Flash Flood Warning
Flash Flood Warning
IDC013-182015-
/O.EXT.KPIH.FF.W.0012.000000T0000Z-260918T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pocatello ID
1150 AM MDT Fri Sep 18 2026
The National Weather Service in Pocatello has extended the
* Flash Flood Warning for...
The Ohio burn scar in...
Northwestern Blaine County in central Idaho...
* Until 215 PM MDT.
* At 1150 AM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the Ohio Burn Scar. Between 0.5 and 1 inch of rain
has already fallen. The expected rainfall rate is 0.5 to 1 inch in
1 hour. Flash flooding is ongoing or expected to begin shortly.
Excessive rainfall over the burn scar will result in debris flow
moving through the Ohio burn scar. The debris flow can consist of
rock, mud, vegetation and other loose materials.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding in and around the Ohio Burn Scar.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of areas in and around the
Ohio Burn Scar.
* Some locations that will experience flash flooding include...
Mainly rural areas of Northwestern Blaine County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a life threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of creeks...streams...and ditches
in the Ohio Burn Scar. Severe debris flows can also be anticipated
across roads. Roads and driveways may be washed away in places. If
you encounter flood waters...climb to safety.
&&
LAT...LON 4357 11433 4358 11432 4359 11433 4359 11432
4360 11430 4361 11426 4360 11425 4359 11426
4356 11430 4356 11433
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR
$$
TAX
Flash Flood Warning
IDC039-182000-
/O.NEW.KBOI.FF.W.0011.260918T1749Z-260918T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boise ID
1149 AM MDT Fri Sep 18 2026
The National Weather Service in Boise has issued a
* Flash Flood Warning for...
The MM115 HWY 20 burn scar in...
Central Elmore County in southwestern Idaho...
* Until 200 PM MDT.
* At 1149 AM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the MM115 HWY 20 Burn Scar. The expected rainfall
rate is 0.25 to 0.75 inches in 1 hour. Flash flooding is ongoing or
expected to begin shortly. Excessive rainfall over the burn scar
will result in debris flow. The debris flow can consist of rock,
mud, vegetation and other loose materials.
HAZARD...Flash flooding caused by thunderstorms in and around the
MM115 HWY 20 Burn Scar.
SOURCE...Radar indicated.
IMPACT...Flooding of areas in and around the MM115 HWY 20 Burn
Scar.
* Some locations that will experience flash flooding include...
Mainly rural areas of Central Elmore County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a life threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of creeks...streams...and ditches
in the MM115 HWY 20 Burn Scar. Severe debris flows can also be
anticipated across roads. Roads and driveways may be washed away in
places. If you encounter flood waters...climb to safety.
&&
LAT...LON 4327 11541 4328 11541 4328 11544 4331 11544
4331 11540 4330 11540 4330 11539 4329 11539
4329 11538 4328 11538 4328 11533 4327 11533
4327 11534 4326 11536 4326 11538 4327 11538
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.25-0.75 INCHES IN 1 HOUR
$$
JDS
Flash Flood Watch
Flood Watch
National Weather Service Boise ID
1050 AM MDT Fri Sep 18 2026
IDZ011>014-016-028-190600-
/O.NEW.KBOI.FF.A.0006.260918T1650Z-260919T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
West Central Mountains-Lower Treasure Valley-Boise Mountains-
Upper Treasure Valley-Western Magic Valley-Camas Prairie-
Including the cities of Warm Lake, Cuprum, Big Creek, Bear, Caldwell,
McCall, Pine, Prairie, Ola, Cascade, Selby, Corral, Blaine, Soldier,
Anderson Dam, Twin Falls, Fairfield, Boise, Hill City, and Nampa
1050 AM MDT Fri Sep 18 2026
...FLASH FLOOD WATCH FOR THE WAPITI, CROOKED, BUCKHORN BURN SCAR IN
EFFECT THROUGH THIS EVENING...
* WHAT...Flash flooding and debris flows caused by excessive rainfall
are possible over the Wapiti, Crooked, Buckhorn burn scar areas.
* WHERE...Portions of south central and southwest Idaho, including
the following areas, in south central Idaho, Western Magic Valley.
In southwest Idaho, Boise Mountains, Camas Prairie, Lower Treasure
Valley, Upper Treasure Valley and West Central Mountains.
* WHEN...Through this evening.
* IMPACTS...Heavy rainfall over the Wapiti, Crooked, Buckhorn burn
scar is expected up to and during the period of the watch.
Residents near the Wapiti, Crooked, Buckhorn burn scar should
prepare for potential debris flow. Be sure to stay up to date with
information from local authorities. Heavy rainfall could trigger
flash flooding or debris flows in and near recent wildfire burn
scars.
* ADDITIONAL DETAILS...
- National Weather Service Meteorologists are forecasting heavy
rainfall over the burn scar, which may lead to flash flooding and
debris flows.
- Some locations that may experience flash flooding include...
Idaho City, Fairfield, Lowman, Horseshoe Bend, Pine, Prairie,
Atlanta, Anderson Dam, Corral, Centerville, Pioneerville, Garden
Valley, Banks, Gardena, Crouch, Placerville, Trinity Lakes, Rocky
Bar, Dutch Creek Guard Station and Featherville.
- https://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.
&&
$$
JDS
Flood Advisory
Flood Advisory
National Weather Service Boise ID
1127 AM MDT Fri Sep 18 2026
IDC039-047-073-083-181845-
/O.EXT.KBOI.FA.Y.0006.000000T0000Z-260918T1845Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Elmore ID-Gooding ID-Owyhee ID-Twin Falls ID-
1127 AM MDT Fri Sep 18 2026
...FLOOD ADVISORY NOW IN EFFECT UNTIL 1245 PM MDT THIS AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Northwestern Gooding County in south central Idaho...
Northwestern Twin Falls County in south central Idaho...
Southeastern Elmore County in southwestern Idaho...
East Central Owyhee County in southwestern Idaho...
* WHEN...Until 1245 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Water over
roadways.
* ADDITIONAL DETAILS...
- At 1127 AM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 2 inches of rain
have fallen.
- Some locations that will experience flooding include...
Glenns Ferry, Deadman Flat, King Hill, Twentymile Butte, Blair
Trail Reservoir and White Arrow Hot Spring.
- https://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4270 11504 4269 11504 4270 11546 4307 11544
4309 11492
$$
JDS
Flood Watch
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.
&&
$$
JKeyes
Special Weather Statement
Special Weather Statement
National Weather Service Salt Lake City UT
1149 AM MDT Fri Sep 18 2026
UTZ103-107-110-181815-
Eastern Box Elder County UT-Wasatch Mountains I-80 North UT-
Cache Valley/Utah Portion UT-
1149 AM MDT Fri Sep 18 2026
...A strong thunderstorm will impact portions of north central Weber,
southwestern Cache and east central Box Elder Counties through 1215
PM MDT
...
At 1149 AM MDT, Doppler radar was tracking a strong thunderstorm over
Perry, or near Brigham City, moving northeast at 45 mph.
HAZARD...Half inch hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Logan, Brigham City, Hyrum, Perry, Wellsville, Willard, Mantua,
Corinne, Benson, Peter, Providence, Nibley, Millville, River Heights,
Honeyville, Mendon, Paradise, Deweyville, College Ward, and Mantua
Reservoir.
This includes the following highways...
Interstate 15 between mile markers 356 and 372.
US Route 89 between mile markers 459 and 460.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4136 11195 4144 11215 4178 11206 4172 11169
TIME...MOT...LOC 1749Z 203DEG 38KT 4147 11203
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...<40 MPH
$$
BW
Special Weather Statement
National Weather Service Salt Lake City UT
1130 AM MDT Fri Sep 18 2026
UTZ103-104-107-108-110-181800-
Wasatch Back UT-Eastern Box Elder County UT-
Northern Wasatch Front UT-Wasatch Mountains I-80 North UT-
Cache Valley/Utah Portion UT-
1130 AM MDT Fri Sep 18 2026
...A strong thunderstorm will impact portions of central Weber,
southeastern Cache and east central Box Elder Counties through NOON
MDT
...
At 1130 AM MDT, Doppler radar was tracking a strong thunderstorm over
Ogden, moving northeast at 40 mph.
HAZARD...Half inch hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Ogden, Brigham City, Roy, North Ogden, South Ogden, Washington
Terrace, Riverdale, Willard, Marriott-Slaterville, Mantua, Weber
State University, South Willard, West Haven, Pleasant View, Farr
West, Harrisville, Plain City, Paradise, Eden, and Liberty.
This includes Interstate 15 between mile markers 340 and 355.
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 4115 11196 4124 11214 4163 11189 4148 11151
TIME...MOT...LOC 1730Z 211DEG 34KT 4126 11198
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...<40 MPH
$$
BW
Special Weather Statement
National Weather Service Salt Lake City UT
1112 AM MDT Fri Sep 18 2026
UTZ101-181800-
Great Salt Lake Desert and Mountains UT-
1112 AM MDT Fri Sep 18 2026
...Strong thunderstorms will impact portions of south central Box
Elder and western Tooele Counties through NOON MDT
...
At 1111 AM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 15 miles north of Utah Test and Training Range
South to 17 miles northeast of Ibapah. Movement was northeast at 40
mph.
HAZARD...Wind gusts of 50 to 55 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Utah Test and Training Range South, Knolls, Utah Test and Training
Range North, Clive, Dugway Proving Ground Test Range, and Bonneville
Salt Flats.
This includes Interstate 80 in Utah between mile markers 16 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4135 11312 4087 11287 4039 11289 4008 11378
4083 11375
TIME...MOT...LOC 1711Z 214DEG 36KT 4072 11360 4020 11372
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
$$
BW
