517
WGUS65 KPIH 180852
FFAPIH
URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE POCATELLO ID
252 AM MDT FRI SEP 18 2026
IDZ053-190400-
/O.NEW.KPIH.FF.A.0007.260918T0852Z-260919T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UPPER SNAKE RIVER PLAIN-
INCLUDING THE CITIES OF IDAHO FALLS, REXBURG, AND ST. ANTHONY
252 AM MDT FRI SEP 18 2026
...FLASH FLOOD WATCH FOR THE BIG ROCK BURN SCAR IN EFFECT THROUGH
THIS EVENING...
* WHAT...FLASH FLOODING AND DEBRIS FLOWS CAUSED BY EXCESSIVE RAINFALL
ARE POSSIBLE OVER THE BIG ROCK BURN SCAR.
* WHERE...A PORTION OF SOUTHEAST IDAHO, INCLUDING THE FOLLOWING AREA,
UPPER SNAKE RIVER PLAIN.
* WHEN...THROUGH THIS EVENING.
* IMPACTS...HEAVY RAINFALL OVER THE BIG ROCK BURN SCAR IS EXPECTED
DURING THE PERIOD OF THE WATCH. ANYONE IN OR NEAR THE BIG ROCK BURN
SCAR SHOULD PREPARE FOR POTENTIAL DEBRIS FLOW MOVING THROUGH THE
BIG ROCK BURN SCAR. BE SURE TO STAY UP TO DATE WITH INFORMATION
FROM LOCAL AUTHORITIES. HEAVY RAINFALL COULD TRIGGER FLASH FLOODING
AND DEBRIS FLOWS IN AND NEAR RECENT WILDFIRE BURN SCARS.
* ADDITIONAL DETAILS...
- NATIONAL WEATHER SERVICE METEOROLOGISTS ARE FORECASTING HEAVY
RAINFALL OVER THE BIG ROCK BURN SCAR, WHICH MAY LEAD TO FLASH
FLOODING AND DEBRIS FLOWS.
- SOME LOCATIONS THAT MAY EXPERIENCE FLASH FLOODING INCLUDE...
HEISE.
- 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.
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