WWA Summary for All Issued by BOI

Flash Flood Watch

Flood Watch
National Weather Service Boise ID
1217 PM PDT Sat Aug 16 2025

IDZ011-012-033-170600-
/O.CON.KBOI.FF.A.0003.000000T0000Z-250817T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
West Central Mountains-Lower Treasure Valley-Upper Weiser River-
Including the cities of Mesa, Warm Lake, Cuprum, Cascade, Nampa,
Indian Valley, Caldwell, McCall, Ola, Goodrich, Council, Big
Creek, Fruitvale, Bear, Glendale, and Cambridge
117 PM MDT Sat Aug 16 2025

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...A portion of southwest Idaho, including the following
  areas, Lower Treasure Valley, Upper Weiser River and West Central
  Mountains.

* WHEN...Until midnight MDT tonight.

* IMPACTS...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 burn scars, which may lead to flash flooding
    and debris flows.
  - 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 Watch
National Weather Service Boise ID
1217 PM PDT Sat Aug 16 2025

ORZ061>064-171200-
/O.EXT.KBOI.FF.A.0003.000000T0000Z-250818T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Harney County-Baker County-Malheur County-Oregon Lower Treasure
Valley-
Including the cities of Venator, Ontario, Nyssa, Crane, Dunnean,
Malheur City, New Princeton, Buchanan, Diamond, Baker, and Burns
1217 PM PDT Sat Aug 16 2025 /117 PM MDT Sat Aug 16 2025/

...FLASH FLOOD WATCH NOW IN EFFECT THROUGH SUNDAY EVENING...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...Portions of northeast and southeast Oregon, including the
  following areas, in northeast Oregon, Baker County. In southeast
  Oregon, Harney County, Malheur County and Oregon Lower Treasure
  Valley.

* WHEN...Through Sunday evening.

* IMPACTS...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 burn scars, which may lead to flash flooding
    and debris flows. National Weather Service Meteorologists are
    forecasting heavy rainfall over burn scars, which may lead to
    flash flooding and debris flows.
  - 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.

&&

$$

Flood Watch
National Weather Service Pendleton OR
121 PM PDT Fri Aug 15 2025

.Significant moisture associated with a passing cold front could
lead to periods of heavy rainfall, especially in and around
thunderstorms through the afternoon and evening. This could lead to
flooding in areas surrounding burn scars associated with the 2024
and 2025 fire seasons.

ORZ503-505-506-170600-
/O.CAN.KPDT.FF.A.0003.250823T1800Z-250824T0600Z/
/O.NEW.KPDT.FF.A.0004.250816T1800Z-250817T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Blue Mountains of Oregon-John Day Basin-Ochoco-John Day
Highlands-
Including the cities of Ukiah, Monument, Long Creek, Paulina,
Mitchell, Dayville, Seneca, North Powder, Brothers, John Day,
Prairie City, and Spray
121 PM PDT Fri Aug 15 2025

...FLASH FLOOD WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

Flash flooding caused by excessive rainfall is possible. Rain rates
of 1 inch per hour possible within thunderstorms.

&&

...FLASH FLOOD WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

* WHAT...Flash flooding caused by excessive rainfall is possible.
  Rain rates of 1 inch per hour possible within thunderstorms.

* WHERE...Portions of central and northeast Oregon, including the
  following areas, in central Oregon, John Day Basin and Ochoco-John
  Day Highlands. In northeast Oregon, Southern Blue Mountains of
  Oregon.

* WHEN...From Saturday morning through Saturday evening.

* IMPACTS...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...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

MC

Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
826 AM MDT Sat Aug 16 2025

IDZ411-413-475-476-170300-
/O.CON.KPIH.FW.W.0018.250816T1800Z-250817T0300Z/
Centennial Mountains and Snake River Range/Targhee NF-
Caribou Range/Caribou NF-East Salmon River Mountains/Salmon NF-
Lemhi and Lost River Range/Challis NF-
826 AM MDT Sat Aug 16 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT
THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES
411, 413, 475, AND 476...

* AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and
  Snake River Range/Targhee NF, Fire Weather Zone 413 Caribou
  Range/Caribou NF, Fire Weather Zone 475 East Salmon River
  Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost
  River Range/Challis NF.

* THUNDERSTORMS...25 to 40 percent coverage.

* OUTFLOW WINDS...A dry low-level environment will promote
  stronger storms capable of producing wind gusts up to 50 to 60
  mph.

* IMPACTS...Critical fire weather conditions are expected
  Saturday afternoon and evening. Lightning may generate new
  fire starts. Any new fire starts or existing fires may spread
  rapidly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$