Flash Flood Watch
Flood Watch
National Weather Service Great Falls MT
159 AM MDT Wed Aug 27 2025
MTZ327-271600-
/O.EXT.KTFX.FF.A.0002.250827T1500Z-250828T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Beaverhead County-
Including the following locations: Jackson and Wisdom
159 AM MDT Wed Aug 27 2025
...FLASH FLOOD WATCH FOR THE BIG HOLLOW, GROUSE, SAWLOG, AND SOUTH
FORK BURN SCAR NOW IN EFFECT FROM 9 AM MDT THIS MORNING THROUGH THIS
EVENING...
* WHAT...Flash flooding and debris flows caused by excessive
rainfall continue to be possible over the Big Hollow, Grouse,
Sawlog, and South Fork burn scars. Rainfall amounts of 1 to 2
inches are possible in less than one hour from thunderstorms.
* WHERE...A portion of southwest Montana, including the following
area, Northwest Beaverhead County.
* WHEN...From 9 AM MDT this morning through this evening.
* IMPACTS...Heavy rainfall over the Big Hollow, Grouse, Sawlog, and
South Fork burn scars is expected up to and during the period of
the watch. Residents near the Big Hollow, Grouse, Sawlog, and
South Fork burn scars should prepare for potential flooding
impacts. Be sure to stay up to date with information from local
authorities. Heavy rainfall could trigger flash flooding of
low-lying areas, urbanized street flooding, and 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.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLAN NOW so you will know what to do in an emergency. Keep informed
by listening to local radio and television for statements and
possible warnings. Follow the advice of public safety officials.
&&
$$
Brusda
Flood Watch
National Weather Service Boise ID
1230 PM PDT Tue Aug 26 2025
.A surge of deep monsoonal moisture combined with a slow-moving
upper trough will bring periods of heavy showers and thunderstorms
across the region. This airmass contains anomalously high moisture
content, supporting the potential for excessive rainfall. Flash
flooding will be possible, especially in steep terrain, narrow
canyons, and near recent burn scars where soils are less able to
absorb rainfall. The greatest risk will be Tuesday afternoon through
Wednesday evening as repeated rounds of storms move through.
IDZ011>016-028>030-033-ORZ062>064-272000-
/O.CON.KBOI.FF.A.0005.000000T0000Z-250828T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
West Central Mountains-Lower Treasure Valley-Boise Mountains-
Upper Treasure Valley-Southwest Highlands-Western Magic Valley-
Camas Prairie-Owyhee Mountains-Southern Twin Falls County-Upper
Weiser River-Baker County-Malheur County-Oregon Lower Treasure
Valley-
Including the cities of Silver City, McCall, Big Creek,
Hollister, Glendale, Ontario, Mesa, Cuprum, Nyssa, Caldwell,
Soldier, Ola, Murphy Hot Springs, Hill City, Fruitvale,
Fairfield, Grasmere, Nampa, Cambridge, Riddle, Council, Warm
Lake, Baker, Malheur City, Rogerson, Prairie, Indian Valley,
Anderson Dam, Selby, Goodrich, Reynolds, Blaine, Corral, Bear,
Three Creek, Cascade, Twin Falls, Boise, and Pine
130 PM MDT Tue Aug 26 2025 /1230 PM PDT Tue Aug 26 2025/
...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY EVENING...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Idaho, including the following areas, Boise
Mountains, Camas Prairie, Lower Treasure Valley, Owyhee Mountains,
Southern Twin Falls County, Southwest Highlands, Upper Treasure
Valley, Upper Weiser River, West Central Mountains and Western
Magic Valley and Oregon, including the following areas, Baker
County, Malheur County and Oregon Lower Treasure Valley.
* WHEN...Through Wednesday evening.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows, especially in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- 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.
&&
$$
TL
Flood Watch
National Weather Service Boise ID
1230 PM PDT Tue Aug 26 2025
.A surge of deep monsoonal moisture combined with a slow-moving
upper trough will bring periods of heavy showers and thunderstorms
across the region. This airmass contains anomalously high moisture
content, supporting the potential for excessive rainfall. Flash
flooding will be possible, especially in steep terrain, narrow
canyons, and near recent burn scars where soils are less able to
absorb rainfall. The greatest risk will be Tuesday afternoon through
Wednesday evening as repeated rounds of storms move through.
ORZ061-271200-
/O.EXT.KBOI.FF.A.0005.000000T0000Z-250827T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Harney County-
Including the cities of Venator, Dunnean, Diamond, Crane,
Buchanan, New Princeton, and Burns
1230 PM PDT Tue Aug 26 2025
...FLASH FLOOD WATCH NOW IN EFFECT THROUGH LATE TONIGHT...
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of southeast Oregon, including the following
county, Harney County.
* WHEN...Through late tonight.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows, especially in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- 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.
Local emergency services are monitoring the situation and will issue
a public statement as conditions warrant. PLAN NOW so you will know
what to do in an emergency. Keep informed by listening to local
radio and television for statements and possible warnings. Follow
the advice of public safety officials.
&&
$$
Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
113 PM PDT Tue Aug 26 2025
CAZ281-284-285-ORZ617-623>625-270815-
/O.NEW.KMFR.FW.W.0023.250827T2000Z-250828T0400Z/
/O.CON.KMFR.FW.W.0022.000000T0000Z-250827T0400Z/
Central Siskiyou County Including Shasta Valley-
Siskiyou County from the Cascade Mountains East and South to Mt
Shasta-Modoc County Except for the Surprise Valley-
Umpqua National Forest-Southern Oregon Cascades-
Klamath Basin and the Fremont-Winema National Forest-
South Central Oregon Desert including the BLM Land in Eastern
Lake and Western Harney Counties-
113 PM PDT Tue Aug 26 2025
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING
FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281,
284, 285, 617, 623, 624, AND 625...
...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM PDT WEDNESDAY FOR
ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281, 284,
285, 617, 623, 624, AND 625...
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect from 1 PM to 9 PM PDT Wednesday.
* IMPACTS...Abundant lightning on dry fuels resulting in the
potential for numerous new fire starts.
* AFFECTED AREA...In California, Fire weather zones 281, 284, and
285, and in Oregon, Fire weather zones 617, 623, 624, and 625.
* THUNDERSTORMS...Scattered thunderstorms with abundant lightning
expected. Storms are likely to be wet, but lightning strikes
outside of precipitation cores are possible, and may cause many
new fire starts.
* OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up
to 25 miles from thunderstorm cores.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Follow all fire restrictions. You can find your county`s
emergency sign up form as well as links to fire restrictions at
weather.gov/medford/wildfire. One less spark, one less wildfire.
Be sure you`re signed up for your county`s emergency alert
system. Familiarize yourself with your emergency plan and make
sure you listen to emergency services. Visit ready.gov/plan for
more information.
A Red Flag Warning is issued when we identify weather conditions
that promote rapid spread of fire which may become life-
threatening. This does not mean there is a fire. These conditions
are either occurring now or will begin soon. It is important to
have multiple ways to receive information from authorities.
&&
$$
Flood Advisory
Flood Advisory
National Weather Service Boise ID
410 AM MDT Wed Aug 27 2025
IDC001-027-073-271315-
/O.NEW.KBOI.FA.Y.0007.250827T1010Z-250827T1315Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ada ID-Canyon ID-Owyhee ID-
410 AM MDT Wed Aug 27 2025
...FLOOD ADVISORY IN EFFECT UNTIL 715 AM MDT THIS MORNING...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...A portion of southwest Idaho, including the following
counties, Ada, Canyon and Owyhee.
* WHEN...Until 715 AM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways including Highway 78.
* ADDITIONAL DETAILS...
- At 406 AM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area.
- Some locations that will experience flooding include...
Melba, Walters Ferry, Guffey, Initial Point and Givens Hot
Springs.
- https://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4347 11656 4343 11639 4333 11628 4324 11658
4345 11674
$$
Flood Watch
Flood Watch
National Weather Service Pocatello ID
106 AM MDT Wed Aug 27 2025
IDZ051>075-280600-
/O.CON.KPIH.FA.A.0001.000000T0000Z-250828T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shoshone/Lava Beds-Arco/Mud Lake Desert-Upper Snake River Plain-
Lower Snake River Plain-Eastern Magic Valley-Southern
Hills/Albion Mountains-Raft River Region-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-Lost River Range-
Challis/Pahsimeroi Valleys-Frank Church Wilderness-
Sawtooth/Stanley Basin-Sun Valley Region-Big Lost
Highlands/Copper Basin-Wood River Foothills-
Including the cities of Soda Springs, Dubois, Burley, Idaho
Falls, Malta, Arco, Mackay, Clayton, Howe, Borah Peak, St.
Anthony, Craters of the Moon NM, Shoshone, McCammon, Montpelier,
Downey, St. Charles, Rupert, Georgetown, Heyburn, Thatcher,
Challis, Preston, Oakley, Swan Valley, Lava Hot Springs, Ashton,
Emigration Summit, Hailey, Victor, Almo, Rockland, Grace,
Rexburg, Tetonia, Spencer, Albion, Small, Ketchum, Island Park,
Carey, Edie School, Bellevue, Henry, Bone, Copper Basin, INL,
Blackfoot, Shelley, Inkom, Mud Lake, Fort Hall, Stanley,
Pocatello, Malad, Wayan, Driggs, Holbrook, Kilgore, Picabo,
American Falls, Chilly, Galena, Sun Valley, and Richfield
106 AM MDT Wed Aug 27 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of central, eastern, south central, and southeast
Idaho, including the following areas, in central Idaho, Big Lost
Highlands/Copper Basin, Challis/Pahsimeroi Valleys, Frank Church
Wilderness, Lost River Range, 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 south
central Idaho, Eastern Magic Valley and Shoshone/Lava Beds. 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, Marsh and Arbon Highlands,
Raft River Region, Southern Hills/Albion Mountains and 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.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
13
Flood Watch
National Weather Service Missoula MT
1036 AM MDT Tue Aug 26 2025
IDC049-059-271645-
/O.NEW.KMSO.FA.A.0007.250827T1800Z-250828T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Idaho-Lemhi-
1036 AM MDT Tue Aug 26 2025 /936 AM PDT Tue Aug 26 2025/
...FLOOD WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY
EVENING...
* WHAT...Flash flooding and debris flows caused by excessive
rainfall.
* WHERE...Portions of central and east central Idaho, including the
following counties, in central Idaho, Idaho. In east central
Idaho, Lemhi.
This includes the following Specific Areas...
Highway 95 from Riggins to Whitebird, Moose Fire Burn Area, Williams
Creek Fire Burn Area and Magruder Fire Burn Area.
* WHEN...From Wednesday afternoon through Wednesday evening.
* IMPACTS...Excessive runoff may result in rock and mudslides along
steep terrain, recent burn scars, and flood-prone locations.
* ADDITIONAL DETAILS...
- https://www.weather.gov/mso/hydrology
$$
Flood Watch
National Weather Service Missoula MT
1036 AM MDT Tue Aug 26 2025
MTC081-271645-
/O.NEW.KMSO.FA.A.0007.250827T1800Z-250828T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ravalli-
1036 AM MDT Tue Aug 26 2025
...FLOOD WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY
EVENING...
* WHAT...Flash flooding and debris flows caused by excessive
rainfall.
* WHERE...A portion of west central Montana, including the following
county, Ravalli.
This includes the following Specific Areas...
Johnson Fire Burn Area, Daly Fire Burn Area and Sharrott Fire Burn
Area.
* WHEN...From Wednesday afternoon through Wednesday evening.
* IMPACTS...Excessive runoff may result in rock and mudslides along
steep terrain, recent burn scars, and flood-prone locations.
* ADDITIONAL DETAILS...
- https://www.weather.gov/mso/hydrology
$$
Flood Watch
National Weather Service Elko NV
718 PM PDT Mon Aug 25 2025
NVZ031-033>041-270230-
/O.NEW.KLKN.FA.A.0001.250826T0218Z-250828T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Elko-Southeastern Elko-Ruby Mountains and East Humboldt
Range in Elko-White Pine-Northern Lander and Northern Eureka-
Southern Lander and Southern Eureka-Southwest Elko-South Central
Elko-Northwestern Nye-Northeastern Nye-
Including the cities of Owyhee, Pinto Summit, Argenta, Lund,
McGill, Palisade, Lamoille, Dunphy, Gibbs Ranch, Cherry Creek,
South Fork, Charleston, Diamond Valley, Jiggs, Oasis, Blue Eagle
Ranch, Ely, Duckwater, Midas, Grass Valley, Ryndon, Ruby Lake,
Mountain City, Lee, Beowawe, Jarbidge, Hickison Summit,
Tuscarora, West Wendover, Preston, Emigrant Pass, Elko, Spring
Creek, Garden Pass, Eureka Airport, Tonopah, Battle Mountain,
Ruth, Crescent Valley, Eureka, Round Mountain, Manhattan, and Ely
Airport
718 PM PDT Mon Aug 25 2025
...FLOOD WATCH IN EFFECT THROUGH WEDNESDAY EVENING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
Flash flooding is also possible over recent burn scar areas
including the Jakes, Midas, Cottonwood Peak, Adobe, Sheep Creek
Canyon, Big Butte, Hot Canyon, Chin Creek, Summit, and other
recently burned areas.
* WHERE...Portions of eastern, north central, northeast, and south
central Nevada, including the following areas, in eastern Nevada,
White Pine. In north central Nevada, Northern Lander and Northern
Eureka and Southern Lander and Southern Eureka. In northeast
Nevada, Northern Elko, Ruby Mountains and East Humboldt Range in
Elko, South Central Elko, Southeastern Elko and Southwest Elko. In
south central Nevada, Northeastern Nye and Northwestern Nye.
* WHEN...Through Wednesday evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations
including burn scars.
* ADDITIONAL DETAILS...
- 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.
&&
$$
86
Air Quality Alert
IDC035-049-271800-
Clearwater-Idaho-
1201 PM MDT Mon Aug 25 2025 /1101 AM PDT Mon Aug 25 2025/
An Air Quality Alert has been issued by the following agencies:
Idaho Department of Environmental Quality in Lewiston
* WHAT...Air Quality Advisory because of forecast stagnant weather conditions.
Air Quality Index is forecast to be Unhealthy for Sensitive Groups.
* WHERE...Clearwater and Idaho Counties.
* WHEN...Until 11 am PDT 8/27/2025
* IMPACTS...Members of sensitive groups may experience health effects.
The general public is less likely to be affected.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Air pollutants can cause breathing difficulties for children, the elderly, as
well as persons with respiratory problems. Those individuals who are sensitive
to increased particulate matter or smoke are encouraged to avoid prolonged or
strenuous outdoor activity during this advisory. Open burning is prohibited
by air quality rule. It is also recommended that all other individuals limit
prolonged strenuous activity outdoors.
Idaho Department of Health and Welfare
https://healthandwelfare.idaho.gov/health-wellness/environmental-
health/idaho-wildfire-and-smoke-information
Idaho Smoke Information Hotline: 1-800-345-1007
Lewiston Regional Office: (208) 799-4370.
$$
