Headline:
Flash Flood Warning issued September 18 at 10:44AM MDT until September 18 at 1:45PM MDT by NWS Pocatello ID
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
September 18, 2026 - 9:44am
Expires:
September 18, 2026 - 12:45pm
Description:
FFWPIH
The National Weather Service in Pocatello has issued a
* Flash Flood Warning for...
The Big Rock burn scar in...
Southeastern Jefferson County in southeastern Idaho...
South Central Madison County in southeastern Idaho...
* Until 145 PM MDT.
* At 1044 AM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the Big Rock Burn Scar. The expected rainfall rate
is 0.5 to 1 inch in 1 hour. Already saturated and filled ditches
and culverts could become quickly inundated. Flash flooding is
ongoing or expected to begin shortly. Excessive rainfall over the
burn scar will result in debris flow moving through the Big Rock
burn scar. The debris flow can consist of rock, mud, vegetation and
other loose materials.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding in and around the Big Rock Burn Scar.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of areas in and around the
Big Rock Burn Scar.
* Some locations that will experience flash flooding include...
Heise.
Instruction:
This is a life threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of creeks...streams...and ditches
in the Big Rock Burn Scar. 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.
Area Description:
Jefferson, ID; Madison, ID
Forcast Office:
NWS Pocatello ID
Sender:
w-nws.webmaster@noaa.gov