355
WGUS55 KBOI 240431
FFWBOI
IDC015-240630-
/O.NEW.KBOI.FF.W.0005.260724T0431Z-260724T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BOISE ID
1031 PM MDT THU JUL 23 2026
THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
THE WAPITI BURN AREA IN...
NORTHEASTERN BOISE COUNTY IN SOUTHWESTERN IDAHO...
* UNTIL 1230 AM MDT.
* AT 1031 PM MDT, DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN OVER THE WAPITI BURN AREA. FLASH FLOODING IS ONGOING OR
EXPECTED TO BEGIN SHORTLY.
EXCESSIVE RAINFALL OVER THE BURN SCAR WILL RESULT IN DEBRIS FLOW
ALONG HIGHWAY 21 SOUTH OF BANNER SUMMIT. THE DEBRIS FLOW CAN CONSIST
OF ROCK, MUD, VEGETATION AND OTHER LOOSE MATERIALS.
HAZARD...LIFE THREATENING FLASH FLOODING AND DEBRIS FLOWS IN
AND AROUND THE WAPITI FIRE BURN SCAR.
SOURCE...RADAR.
IMPACT...LIFE THREATENING FLASH FLOODING AND DEBRIS FLOWS IN
AND AROUND THE WAPITI FIRE BURN SCAR WILL IMPACT
GRANDJEAN ROAD AND HIGHWAY 21 FROM EAST OF LOWMAN TO
BANNER SUMMIT.
* SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
HIGHWAY 21 BETWEEN GRANDJEAN RD AND BANNER SUMMIT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A LIFE THREATENING SITUATION. HEAVY RAINFALL WILL CAUSE
EXTENSIVE AND SEVERE FLASH FLOODING OF CREEKS...STREAMS...AND
DITCHES IN THE WAPITI BURN AREA. SEVERE DEBRIS FLOWS CAN ALSO BE
ANTICIPATED ACROSS ROADS. ROADS AND DRIVEWAYS MAY BE WASHED AWAY IN
PLACES. IF YOU ENCOUNTER FLOOD WATERS...CLIMB TO SAFETY.
LAT...LON 4422 11533 4430 11532 4432 11528 4429 11524
4431 11522 4428 11520 4430 11518 4425 11516
4420 11517 4415 11506 4412 11507 4410 11503
4406 11513 4410 11517 4410 11523 4409 11523
4414 11536 4416 11537
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
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