Weather Alerts for Sawtooth/Stanley Basin

Issued by the National Weather Service

       Special Weather Statement      

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
SAWTOOTH/STANLEY BASIN

Areas Affected:
Upper Snake River Valley/Idaho Falls BLM - Centennial Mountains and Snake River Range/Targhee NF - Caribou Range/Caribou NF - Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River
Effective: Tue, 7/15 1:06pm Updated: Tue, 7/15 7:19pm Urgency: Expected
Expires: Tue, 7/15 9:00pm Severity:  Severe  Certainty: Likely

 
Details:
* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River
Valley/Idaho Falls BLM, Fire Weather Zone 411 Centennial
Mountains and Snake River Range/Targhee NF, Fire Weather Zone
413 Caribou Range/Caribou NF and Fire Weather Zone 427 Goose
Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River.

* TIMING...Scattered thunderstorms are expected to develop
during the afternoon and evening hours, supporting the
potential for gusty outflow winds and frequent lightning.

* WINDS...A dry low level environment will promote the potential
for storms to produce gusty outflow wind gusts in excess of 40-
50 mph, locally higher up to around 60 mph.

* RELATIVE HUMIDITY...As low as 15 to 25 percent.

* THUNDERSTORMS...25 to 45 percent coverage expected.

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

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:

- 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.

Special Weather Statement  SPECIAL WEATHER STATEMENT   Special Weather Statement
SAWTOOTH/STANLEY BASIN

Areas Affected:
Arco/Mud Lake Desert - Upper Snake River Plain - Lower Snake River Plain - Eastern Magic Valley - Marsh and Arbon Highlands - Blackfoot Mountains - Caribou Range - Big Hole Mountains
Effective: Tue, 7/15 6:59pm Updated: Tue, 7/15 7:19pm Urgency: Expected
Expires: Tue, 7/15 7:30pm Severity:  Moderate  Certainty: Observed

 
Details:
At 656 PM MDT, Doppler radar was tracking gusty outflow winds along
a line extending from 8 miles west of Taber to 6 miles southeast of
Bone.
Movement was northeast at 50 mph.

HAZARD...Wind gusts of 50 to 55 mph. Blowing dust reducing
visibility to below 2 miles.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.

Locations impacted include...
Idaho Falls, Rigby, Ririe Reservoir, Lorenzo, Goshen, Ammon, Shelley,
Iona, Ucon, Menan, Ririe, Roberts, Firth, Lewisville, Atomic City,
Archer, Rose, Southeast Inl, Taber, and Bone.

Information:
If outdoors, consider seeking shelter inside a building.

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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