Weather Alerts for Upper Treasure Valley

Issued by the National Weather Service

Flash Flood Watch  FLASH FLOOD WATCH   Flash Flood Watch
UPPER TREASURE VALLEY

Areas Affected:
Boise Mountains
Effective: Fri, 7/17 1:18pm Updated: Fri, 7/17 2:49pm Urgency: Future
Expires: Fri, 7/17 9:00pm Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Flash flooding and debris flows caused by excessive
rainfall continue to be possible over the Wapiti Burn Area.

* WHERE...In an around the Wapiti Burn Scar in the Boise Mountains,
including Highway 21 between Grandjean and Banner Summit.

* WHEN...Until 9 PM MDT this evening.

* IMPACTS...Heavy rainfall over the Wapiti Burn Area is possible
during the period of the watch. Residents near the Wapiti Burn
Area should prepare for potential flooding impacts.

* ADDITIONAL DETAILS...
- Heavy rainfall is possible over the Wapiti Burn Area, which
may lead to flash flooding and debris flows.
- https://www.weather.gov/safety/flood

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

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
UPPER TREASURE VALLEY

Areas Affected:
Sawtooth Range/Northern Sawtooth NF - Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River
Effective: Fri, 7/17 1:18am Updated: Fri, 7/17 2:49pm Urgency: Expected
Expires: Fri, 7/17 9:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT
THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES
411, 413, 422, 427, 475 AND 476...

* AFFECTED AREA...Fire Weather Zone 422 Sawtooth Range/Northern
Sawtooth NF and Fire Weather Zone 427 Goose Creek and Raft
River Valley/Southern Sawtooth NF/Twin Falls BLM south of the
Snake River.

* IMPACTS...Scattered thunderstorms can produce frequent
lightning that may in turn produce wildfire starts in
receptive fuels.

* THUNDERSTORMS...A mix of wet and dry storms, with wetting rains
possible with stronger storms.

* OUTFLOW WINDS...Gusts over 35 mph with peak gusts nearing 55-60
mph.

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

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

CoCoRaHS (Community Collaborative Rain, Hail and Snow Network) Station Number: ID-GM-5 Live Lightning Map - USA Boise Skywarn Spotter ID: DO21 AlertID Southwestern Weather Network
Northwestern Weather Network


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