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Frost Advisory


URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
350 AM CDT Fri Sep 21 2018

NDZ001-009-017-018-031>033-040-041-043-044-211400-
/O.CON.KBIS.FR.Y.0004.000000T0000Z-180921T1400Z/
Divide-Williams-McKenzie-Dunn-Golden Valley-Billings-Stark-Slope-
Hettinger-Bowman-Adams-
Including the cities of Crosby, Williston, Watford City,
Killdeer, Halliday, Beach, Medora, Dickinson, Marmarth, Mott,
New England, Bowman, and Hettinger
350 AM CDT Fri Sep 21 2018 /250 AM MDT Fri Sep 21 2018/

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT /8 AM MDT/
THIS MORNING...

* TEMPERATURE...In the lower to mid 30s.

* IMPACTS...Sensitive outdoor plants may be killed if left
  unprotected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
twh


Fire Weather Watch


URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
251 AM MDT Fri Sep 21 2018

...Dry cold front passing through Idaho Saturday evening...

.A dry cold front is expected to pass through central Idaho early
Saturday afternoon and the Caribou Highlands late afternoon or
early evening. Before the cold front arrives, it should increase
the wind, warm temperatures, and, as a result, lower humidity.
Winds in the higher elevations of the Salmon-Challis NF, the
northern portion of the Sawtooth NF, and the Caribou NF, may have
winds gusting in excess of 25 mph, and humidity below 15 percent
Saturday afternoon.

IDZ422-476-212100-
/O.CON.KPIH.FW.A.0009.180922T1800Z-180923T0300Z/
Sawtooth Range/Northern Sawtooth NF-
Lemhi and Lost River Range/Challis NF-
251 AM MDT Fri Sep 21 2018

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH SATURDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONES 422 AND 476 ABOVE 7500 FEET
ELEVATION...

* AFFECTED AREA...Fire Weather Zone 422 Sawtooth Range/Northern
  Sawtooth NF and Fire Weather Zone 476 Lemhi and Lost River
  Range/Challis NF.

* WINDS...Southwest 15 to 25 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 11 percent.

* IMPACTS...These weather conditions, combined with extremely
  dry and receptive fuels, can mean rapid spread rates, high
  fire intensity, and produce extreme fire behavior such as fire
  whirls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A fire weather watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
217 AM MDT Fri Sep 21 2018

WYZ414>416-212200-
/O.NEW.KRIW.FW.A.0012.180922T1800Z-180924T0200Z/
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
North Zone Bridger Teton NF and Grand Teton NP-
West Wind River Mountains/East Zone Bridger Teton NF-
217 AM MDT Fri Sep 21 2018

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SUNDAY EVENING...

The National Weather Service in Riverton has issued a Fire Weather
Watch, which is in effect from Saturday afternoon through Sunday
evening.

* IMPACTS: Low Humidities and Strong Gusty Winds will create
  erratic fire behavior and new fire starts.

* AFFECTED AREA:
  In Northwest WY Fire Zone....415.
  In West Central WY Fire Zones...414...416.

* COUNTIES AFFECTED:
  In Central WY...Fremont.
  In North Central WY...Park.
  In West Central WY...Lincoln...Sublette...Teton.

* WIND: West southwest 15 to 25 mph with gusts to 35 mph.

* HUMIDITY: 12 to 15 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible Red
Flag Warnings.

&&

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service Riverton WY
217 AM MDT Fri Sep 21 2018

WYZ280-283-285-288-289-300-212200-
/O.NEW.KRIW.FW.A.0012.180922T1800Z-180924T0200Z/
Natrona County/Casper BLM-Upper Wind River Basin/Wind River Basin-
South Bighorn Mountains-
East Wind River Mountains/South Shoshone NF-
Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain-
217 AM MDT Fri Sep 21 2018

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SUNDAY EVENING...

The National Weather Service in Riverton has issued a Fire Weather
Watch, which is in effect from Saturday afternoon through Sunday
evening.

* IMPACTS: Low Humidities and Strong Gusty Winds will create
  erratic fire behavior and new fire starts.

* AFFECTED AREA:
  In Central WY...Fire Weather Zones 280...283...285...288...
289 and 300.

* COUNTIES AFFECTED:
  In Central WY...Fremont...Natrona.
  In North Central WY...Hot Springs...Johnson...Washakie.
  In Southwest WY...Sweetwater.
  In West Central WY...Sublette.

* WIND: West southwest 15 to 25 mph with gusts to 30 mph.

* HUMIDITY: 8 to 13 percent.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible Red
Flag Warnings.

&&

$$

http://weather.gov/riverton


Special Weather Statement


Special Weather Statement
National Weather Service Great Falls MT
437 AM MDT Fri Sep 21 2018

MTZ011-047-211500-
Hill-Blaine-
Including the cities of Havre, Rocky Boy, Chinook, Lloyd, Zurich,
Harlem, Hogeland, Hays, and Lodge Pole
437 AM MDT Fri Sep 21 2018

...AREAS OF FOG ACROSS HILL AND BLAINE COUNTIES THIS MORNING...

Areas of fog will affect portions of Hill and Blaine counties
through mid-morning today before dissipating by noon. Localized visibility
reductions as low as one quarter mile have been observed in the
thickest fog. Motorist should be prepared for rapid changes in
visibility through the morning hours. Slow down, use your low beam
headlights, and allow extra spacing between vehicles.

$$

Special Weather Statement
National Weather Service Riverton WY
235 PM MDT Thu Sep 20 2018

WYZ003-005-006-016>018-020-211400-
Cody Foothills-Southwest Big Horn Basin-Southeast Big Horn Basin-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Natrona County Lower Elevations-
Including the cities of Cody, Meeteetse, Thermopolis, Worland,
Dubois, Riverton, Shoshoni, Lander, and Casper
235 PM MDT Thu Sep 20 2018

...Possible Freezing Temperatures Friday Morning in Low Lying
Areas...

A clearing sky after a cool day today will lead to a chilly night
tonight around the region. The normally cold low lying areas
could see temperatures at or near freezing by sunrise Friday
morning. This would include low lying areas along the Wind River,
Bighorn River, Shoshone River, Popo Agie, and Little Popo Agie
Rivers, and low lying areas around Casper. If you have sensitive
outside plants or gardens, it might be a good idea to be prepared
to cover them up Thursday night. Temperatures will be a couple
degrees warmer Friday night, but still down into the upper 30s for
a few areas.

$$

McDonald


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Bismarck ND
457 AM CDT Fri Sep 21 2018

NDZ001-009-017-018-031>033-040-041-043-044-221000-
Divide-Williams-McKenzie-Dunn-Golden Valley-Billings-Stark-Slope-
Hettinger-Bowman-Adams-
457 AM CDT Fri Sep 21 2018 /357 AM MDT Fri Sep 21 2018/

This Hazardous Weather Outlook is for portions of northwest North
Dakota and southwest North Dakota.

.DAY ONE...Today and Tonight

Areas of frost are expected early this morning. A frost advisory
remains in effect. See www.weather.gov/bis for details. Patchy fog
can also be expected in some areas early this morning.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Riverton WY
250 AM MDT Fri Sep 21 2018

WYZ001>020-022>030-221330-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
250 AM MDT Fri Sep 21 2018

...Fire Weather Watch for Central and Southern Wyoming from
Saturday afternoon through Sunday evening...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Elevated fire weather conditions mainly over central and
southern areas.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday and Sunday...Critical fire weather conditions over much
of central and southern parts of the area. Please see the fire
weather watch for more details.

Monday...Elevated to critical fire weather conditions over the
southwest.

Wednesday...Elevated fire weather conditions over the southwest.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

$$

TEAM RIVERTON

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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