Severe Thunderstorm Warning
Severe Weather Statement
National Weather Service Salt Lake City UT
245 PM MDT Fri Sep 18 2026
UTC029-033-057-WYC041-182100-
/O.CON.KSLC.SV.W.0137.000000T0000Z-260918T2100Z/
Weber UT-Rich UT-Morgan UT-Uinta WY-
245 PM MDT Fri Sep 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MDT
FOR NORTHEASTERN WEBER...SOUTHERN RICH...NORTHEASTERN MORGAN AND
NORTHWESTERN UINTA COUNTIES...
At 244 PM MDT, a severe thunderstorm was located 10 miles southwest
of Woodruff, or 18 miles south of Randolph, moving northeast at 40
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Randolph, Woodruff, and Almy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4133 11088 4119 11148 4143 11152 4145 11150
4171 11116
TIME...MOT...LOC 2044Z 233DEG 35KT 4142 11132
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BW
Severe Weather Statement
National Weather Service Salt Lake City UT
242 PM MDT Fri Sep 18 2026
UTC011-029-057-182100-
/O.CON.KSLC.SV.W.0136.000000T0000Z-260918T2100Z/
Weber UT-Davis UT-Morgan UT-
242 PM MDT Fri Sep 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MDT
FOR SOUTH CENTRAL WEBER...NORTHEASTERN DAVIS AND WEST CENTRAL MORGAN
COUNTIES...
At 241 PM MDT, a severe thunderstorm was located over South Weber, or
near Layton, moving northeast at 35 mph.
HAZARD...Half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Ogden, Layton, Farmington, Hill Air Force Base, Kaysville, South
Ogden, Centerville, South Weber, Uintah, Fruit Heights, East Layton,
Mountain Green, and Snowbasin.
This includes the following highways...
Interstate 15 between mile markers 323 and 325, and between mile
markers 328 and 332.
Interstate 84 between mile markers 86 and 95.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4093 11186 4108 11200 4122 11189 4114 11178
4095 11169
TIME...MOT...LOC 2041Z 203DEG 30KT 4111 11191
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
BW
Severe Weather Statement
Severe Weather Statement
National Weather Service Salt Lake City UT
245 PM MDT Fri Sep 18 2026
UTC029-033-057-WYC041-182100-
/O.CON.KSLC.SV.W.0137.000000T0000Z-260918T2100Z/
Weber UT-Rich UT-Morgan UT-Uinta WY-
245 PM MDT Fri Sep 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MDT
FOR NORTHEASTERN WEBER...SOUTHERN RICH...NORTHEASTERN MORGAN AND
NORTHWESTERN UINTA COUNTIES...
At 244 PM MDT, a severe thunderstorm was located 10 miles southwest
of Woodruff, or 18 miles south of Randolph, moving northeast at 40
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Randolph, Woodruff, and Almy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4133 11088 4119 11148 4143 11152 4145 11150
4171 11116
TIME...MOT...LOC 2044Z 233DEG 35KT 4142 11132
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BW
Flood Advisory
Flood Advisory
National Weather Service Salt Lake City UT
250 PM MDT Fri Sep 18 2026
UTC011-057-182345-
/O.NEW.KSLC.FA.Y.0037.260918T2050Z-260918T2345Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Davis UT-Weber UT-
250 PM MDT Fri Sep 18 2026
...FLOOD ADVISORY IN EFFECT UNTIL 545 PM MDT THIS AFTERNOON...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Northeastern Davis County in northern Utah...
South Central Weber County in northern Utah...
* WHEN...Until 545 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas due
to heavy rainfall from strong thunderstorms. River or stream flows,
especially along the Weber River, are expected to rise.
* ADDITIONAL DETAILS...
- At 248 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Public reported minor flooding is already
occurring in the advisory area. Between 0.75 and 1.25 inches of
rain have fallen.
- Some locations that will experience flooding include...
Ogden, Layton, Farmington, Hill Air Force Base, Roy, Clearfield,
Kaysville, South Ogden, Washington Terrace, Riverdale, South
Weber, Uintah, Weber State University, Sunset, Fruit Heights and
East Layton.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4116 11204 4118 11200 4121 11192 4120 11188
4118 11187 4117 11188 4116 11187 4116 11186
4115 11186 4111 11185 4110 11186 4108 11185
4106 11185 4101 11184 4096 11196 4109 11203
$$
BW
Flood Advisory
National Weather Service Riverton WY
232 PM MDT Fri Sep 18 2026
WYC013-037-182230-
/O.NEW.KRIW.FA.Y.0048.260918T2032Z-260918T2230Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont WY-Sweetwater WY-
232 PM MDT Fri Sep 18 2026
...FLOOD ADVISORY IN EFFECT UNTIL 430 PM MDT THIS AFTERNOON...
* WHAT...Arroyo and small stream flooding caused by excessive
rainfall is expected.
* WHERE...Southeastern Fremont County in central Wyoming...
Northeastern Sweetwater County in south central Wyoming...
* WHEN...Until 430 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Overflowing poor
drainage areas.
* ADDITIONAL DETAILS...
- At 232 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause arroyo and small stream flooding.
Up to 0.5 inches of rain have fallen.
- Additional rainfall amounts of 0.1 to 0.8 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Bairoil and Green Mountain.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 4220 10776 4237 10752 4212 10752 4213 10780
$$
Rowe
Flood Advisory
National Weather Service Riverton WY
155 PM MDT Fri Sep 18 2026
WYC013-182300-
/O.NEW.KRIW.FA.Y.0047.260918T1955Z-260918T2300Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fremont WY-
155 PM MDT Fri Sep 18 2026
...FLOOD ADVISORY IN EFFECT UNTIL 5 PM MDT THIS AFTERNOON...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Southeastern Fremont County in central Wyoming...
* WHEN...Until 500 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Overflowing poor drainage areas. Ponding of water in urban or other
areas is occurring or is imminent.
* ADDITIONAL DETAILS...
- At 155 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.3 and 1.5 inches of rain
have fallen.
- Additional rainfall amounts of 0.5 to 2 inches are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Riverton, Arapahoe, Hudson, Arapahoe Elementary School, St
Stephens and Fremont County Fairgrounds.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4282 10863 4292 10858 4308 10839 4304 10828
4289 10842 4277 10852
$$
Rowe
Flood Watch
Flood Watch
National Weather Service Riverton WY
110 PM MDT Fri Sep 18 2026
WYZ001-191300-
/O.EXA.KRIW.FA.A.0006.000000T0000Z-260921T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yellowstone National Park-
Including the cities of Old Faithful, Lake, and Mammoth
110 PM MDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT THROUGH SUNDAY AFTERNOON...
* WHAT...Flash flooding caused by moderate to heavy rainfall is
possible, especially in terrain and poor drainage areas.
* WHERE...Northwest Wyoming, including Yellowstone National Park.
* WHEN...Through Sunday afternoon.
* IMPACTS...Heavy rainfall may result in flooding of rivers, creeks,
streams, and other low-lying and flood-prone locations. Flooding
may occur in poor drainage areas and around steep terrain.
* ADDITIONAL DETAILS...
- A slow moving weather system will move across Wyoming today
through Sunday and bring rounds of showers and thunderstorms to
the region, especially northern Wyoming. Any shower or
thunderstorm could produce moderate to heavy rainfall across the
Watch Area.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
Flood Watch
National Weather Service Riverton WY
110 PM MDT Fri Sep 18 2026
WYZ002-003-007>011-191300-
/O.CON.KRIW.FA.A.0006.000000T0000Z-260921T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Absaroka Mountains-Cody Foothills-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-Northeast
Johnson County-Southeast Johnson County-
Including the cities of Clark, Cody, Kaycee, Buffalo, and Meeteetse
110 PM MDT Fri Sep 18 2026
...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON...
* WHAT...Flash flooding caused by moderate to heavy rainfall is
possible, especially in terrain and poor drainage areas.
* WHERE...Portions of central, north central, and northwest Wyoming,
including the following areas, in central Wyoming, Owl Creek and
Bridger Mountains. In north central Wyoming, Bighorn Mountains
Southeast, Bighorn Mountains West, Northeast Johnson County and
Southeast Johnson County. In northwest Wyoming, Absaroka Mountains
and Cody Foothills.
* WHEN...Through Sunday afternoon.
* IMPACTS...Excessive rainfall may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas and around
steep terrain.
* ADDITIONAL DETAILS...
- A slow moving weather system will move across Wyoming today
through Sunday and bring rounds of showers and thunderstorms to
the region, especially northern Wyoming. Any shower or
thunderstorm could produce moderate to heavy rainfall across the
Watch Area.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
Gerhardt
Flood Watch
National Weather Service Billings MT
1103 AM MDT Fri Sep 18 2026
.A strong and slow moving weather system will impact the region
tonight through Sunday. Well above normal atmospheric moisture levels
combined with the dynamics from this storm system will provide the
potential for heavy rainfall during this period. Thunderstorms
embedded in the more general rainfall will have the potential to
produce flash flooding, particularly over recent burn scars.
MTZ029>031-034-036-040-042-056>058-063>068-138-139-141-169>173-228-
235-WYZ198-199-191715-
/O.CON.KBYZ.FA.A.0004.260919T0000Z-260921T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Musselshell-Treasure-Northern Rosebud-Northern Stillwater-Powder
River-Northern Park-Golden Valley-Red Lodge Foothills-Northern
Big Horn-Southern Rosebud-Judith Gap-Paradise Valley-Livingston
Area-Beartooth Foothills-Absaroka/Beartooth Mountains-Crazy
Mountains-Southern Big Horn-Southeastern Carbon-Northern Sweet
Grass-Bighorn Canyon-Northern Carbon-Pryor/Northern Bighorn
Mountains-Melville Foothills-Northeastern Yellowstone-Southern
Wheatland-Southwestern Yellowstone-Northeast Bighorn Mountains-
Sheridan Foothills-
Including the locations of Forsyth, Burgess Jct, Big Timber,
Fromberg, Crow Agency, Joliet, Red Lodge, Wilsall, Sheridan,
Emigrant, Billings, Lame Deer, Colstrip, Bridger, Broadus, Ryegate,
Pompeys Pillar, Melville, Harlowton, Fishtail, Pryor, Absarokee,
Clyde Park, Hardin, Hysham, Judith Gap, Columbus, Lodge Grass, Fort
Smith, Lavina, Roundup, McLeod, Cooke City, Livingston, and Custer
1103 AM MDT Fri Sep 18 2026
...FLOOD WATCH REMAINS IN EFFECT FROM 6 PM MDT THIS EVENING THROUGH
SUNDAY AFTERNOON...
* WHAT...Flooding caused by excessive rainfall is possible, along
with Flash Flooding of recent burn scars.
* WHERE...All of South Central Montana, Portions of Southeast
Montana, and Sheridan County Wyoming.
* WHEN...From 6 PM MDT this evening through Sunday afternoon.
* IMPACTS...Excessive runoff may result in flooding of creeks and
other low-lying and flood-prone locations. Flooding may occur in
poor drainage and urban areas.
* ADDITIONAL DETAILS...
- 1 to 2.5 inches of rainfall is expected across the watch area
tonight through Sunday. Locally heavier totals up to 4 inches are
possible where thunderstorm activity is more persistent.
- The Robertson Draw, East Side, Elk, and McGhee-Remington burn
scars are particularly vulnerable to Flash Flooding and debris
flows during the watch period. Any other burn scars from this
summer will have elevated Flash Flood potential as well.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Please monitor forecasts and be alert for possible Flood Warnings.
Those living in areas prone to flooding should be prepared to take
action should flooding develop.
&&
$$
EA
Flood Watch
National Weather Service Pocatello ID
1030 AM MDT Fri Sep 18 2026
IDZ053-190600-
/O.CAN.KPIH.FF.A.0007.000000T0000Z-260919T0400Z/
/O.NEW.KPIH.FA.A.0002.260918T1630Z-260919T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Upper Snake River Plain-
Including the cities of Rexburg, Idaho Falls, and St. Anthony
1030 AM MDT Fri Sep 18 2026
...FLASH FLOOD WATCH FOR THE BIG ROCK BURN SCAR IS BEING EXPANDED...
The Flash Flood Watch for the Big Rock burn scar is being replaced
with a more broad Flash Flood Watch across eastern Idaho.
&&
...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...A portion of southeast Idaho, including the following area,
Upper Snake River Plain.
* WHEN...Through this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas. Storm drains
and ditches may become clogged with debris.
* ADDITIONAL DETAILS...
- Heavy rainfall from thunderstorms is expected through this
evening across eastern Idaho. Rainfall amounts in excess of 0.50"
are possible, leading to flooding within burn scars, steep
terrain, and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
Flood Watch
National Weather Service Pocatello ID
1030 AM MDT Fri Sep 18 2026
IDZ052-054-058>068-070>073-075-190600-
/O.NEW.KPIH.FA.A.0002.260918T1630Z-260919T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Arco/Mud Lake Desert-Lower Snake River Plain-Marsh and Arbon
Highlands-Franklin/Eastern Oneida Region-Bear River Range-Bear
Lake Valley-Blackfoot Mountains-Caribou Range-Big Hole Mountains-
Teton Valley-Centennial Mountains - Island Park-Beaverhead -
Lemhi Highlands-Lost River Valley-Challis/Pahsimeroi Valleys-
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Wood River Foothills-
Including the cities of Montpelier, Craters of the Moon NM, Shelley,
Downey, Tetonia, Chilly, Arco, Malad, Victor, Emigration Summit,
Grace, Stanley, INL, Challis, Kilgore, Blackfoot, Spencer, Dubois,
Georgetown, Lava Hot Springs, American Falls, Preston, Small, Fort
Hall, Galena, Driggs, Soda Springs, McCammon, Island Park, Clayton,
Bellevue, Picabo, Sun Valley, Mud
Lake, Pocatello, St. Charles, Bone, Henry, Howe, Ashton, Wayan,
Mackay, Thatcher, Hailey, Swan Valley, Inkom, Ketchum, and Edie
School
1030 AM MDT Fri Sep 18 2026
...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of central, eastern, and southeast Idaho,
including the following areas, in central Idaho, Challis/Pahsimeroi
Valleys, Frank Church Wilderness, Lost River Valley,
Sawtooth/Stanley Basin, Sun Valley Region and Wood River Foothills.
In eastern Idaho, Beaverhead - Lemhi Highlands, Big Hole Mountains,
Centennial Mountains - Island Park and Teton Valley. In southeast
Idaho, Arco/Mud Lake Desert, Bear Lake Valley, Bear River Range,
Blackfoot Mountains, Caribou Range, Franklin/Eastern Oneida Region,
Lower Snake River Plain and Marsh and Arbon Highlands.
* WHEN...Through this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas. Storm drains
and ditches may become clogged with debris.
* ADDITIONAL DETAILS...
- Heavy rainfall from thunderstorms is expected through this
evening across central and eastern Idaho. Rainfall amounts in
excess of 0.50" are possible, leading to flooding within burn
scars, steep terrain, and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
&&
$$
JKeyes
Special Weather Statement
Special Weather Statement
National Weather Service Riverton WY
240 PM MDT Fri Sep 18 2026
WYZ017-020-182115-
Wind River Basin-Natrona County Lower Elevations-
240 PM MDT Fri Sep 18 2026
...STRONG THUNDERSTORMS WILL IMPACT WEST CENTRAL NATRONA AND EAST
CENTRAL FREMONT COUNTIES THROUGH 315 PM MDT...
At 240 PM MDT, Doppler radar was tracking a cluster of strong
thunderstorms capable of producing a landspout 9 miles northwest of
Castle Gardens, which is 23 miles southeast of Shoshoni, moving
northeast at 30 mph.
HAZARD...Landspouts, wind gusts up to 50 mph, and half inch hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible. Gusty winds
could knock down tree limbs and blow around unsecured
objects.
This storm will remain over mainly rural areas of west central
Natrona and east central Fremont Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4292 10744 4294 10753 4292 10755 4290 10753
4286 10754 4285 10756 4285 10760 4283 10760
4280 10764 4281 10765 4278 10768 4289 10795
4336 10775 4305 10721
TIME...MOT...LOC 2040Z 220DEG 26KT 4301 10776
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
$$
Rowe
Special Weather Statement
National Weather Service Cheyenne WY
238 PM MDT Fri Sep 18 2026
WYZ104-109-182130-
Central Carbon County WY-Ferris/Seminoe/Shirley Mountains WY-
238 PM MDT Fri Sep 18 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL CARBON COUNTY
THROUGH 330 PM MDT...
At 238 PM MDT, Doppler radar was tracking a strong thunderstorm over
Lamont, or 28 miles southeast of Jeffrey City, moving northeast at 30
mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Lamont and Muddy Gap.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4243 10752 4244 10695 4238 10681 4207 10735
4218 10752
TIME...MOT...LOC 2038Z 220DEG 24KT 4222 10742
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
$$
Natoli
Special Weather Statement
National Weather Service Salt Lake City UT
230 PM MDT Fri Sep 18 2026
UTZ112-114-182115-
Western Uinta Basin UT-Western Uinta Mountains UT-
230 PM MDT Fri Sep 18 2026
...A strong thunderstorm will impact portions of northeastern Wasatch
and northwestern Duchesne Counties through 315 PM MDT
...
At 229 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles northwest of Tabiona, or 29 miles east of Heber City, moving
northeast at 25 mph.
HAZARD...Nickel size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Hanna and Moon Lake.
This includes Utah Route 35 between mile markers 28 and 38.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4035 11090 4048 11091 4074 11062 4051 11036
TIME...MOT...LOC 2029Z 228DEG 22KT 4043 11086
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<40 MPH
$$
MPS
Special Weather Statement
National Weather Service Grand Junction CO
229 PM MDT Fri Sep 18 2026
COZ002-004-182100-
Elkhead and Park Mountains CO-Central Yampa River Basin CO-
229 PM MDT Fri Sep 18 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN MOFFAT COUNTY
THROUGH 300 PM MDT...
At 229 PM MDT, Doppler radar was tracking a strong thunderstorm 12
miles north of Craig, moving northeast at 30 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation and
outdoor objects is possible.
This storm will remain over mainly rural areas of northeastern Moffat
County.
This includes Colorado 13 between mile markers 104 and 115.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4098 10743 4078 10720 4064 10760 4072 10768
TIME...MOT...LOC 2029Z 230DEG 27KT 4070 10757
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
$$
KAA
Special Weather Statement
National Weather Service Salt Lake City UT
227 PM MDT Fri Sep 18 2026
UTZ109-110-WYZ021-182115-
Bear Lake and Bear River Valley UT-Wasatch Mountains I-80 North UT-
Southwest Wyoming WY-
227 PM MDT Fri Sep 18 2026
...A strong thunderstorm will impact portions of northeastern Weber,
southeastern Cache, southern Rich, northeastern Morgan and west
central Uinta Counties through 315 PM MDT
...
At 227 PM MDT, Doppler radar was tracking a strong thunderstorm 18
miles northeast of Morgan, moving northeast at 40 mph.
HAZARD...Nickel size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Randolph, Woodruff, Almy, and Causey Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4116 11159 4134 11170 4171 11117 4135 11092
TIME...MOT...LOC 2027Z 233DEG 35KT 4128 11153
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<40 MPH
$$
BW
Hydrologic Outlook
Hydrologic Outlook
WYC003-013-017-019-023-025-029-035-037-039-043-191800-
Hydrologic Outlook
National Weather Service Riverton WY
1020 AM MDT Fri Sep 18 2026
...Tropical Moisture and Thunderstorms Could Produce Heavy Rainfall
and Localized Flooding through Sunday...
A wet weather system will support periods of showers and
thunderstorms across Wyoming Friday, Saturday, and Sunday. This
weather system is funneling abundant tropical moisture into the
state. Given this anomalously high moisture, many thunderstorms will
feature heavy rainfall, possibly leading to localized flooding. Poor
drainage areas, urban areas, and steep terrain will be the most
susceptible locations for this isolated flooding.
Many locations could see rainfall totals anywhere between 0.75" to
1.75" through Sunday afternoon, with a majority of this rain falling
quickly in thunderstorms.
Remember, if you encounter a flooded roadway, turn around don`t down!
$$
Gerhardt
