574 
WGUS55 KPIH 181644
FFWPIH
IDC051-065-181945-
/O.NEW.KPIH.FF.W.0013.260918T1644Z-260918T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pocatello ID
1044 AM MDT Fri Sep 18 2026

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.

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 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.

&&

LAT...LON 4366 11172 4367 11173 4368 11172 4366 11170
      4366 11167 4367 11165 4365 11163 4364 11164
      4364 11165 4363 11166 4363 11169 4364 11169
      4365 11171

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR

$$

TAX

947 
WGUS75 KPIH 181813
FFSPIH

Flash Flood Statement
National Weather Service Pocatello ID
1213 PM MDT Fri Sep 18 2026

IDC051-065-181823-
/O.CAN.KPIH.FF.W.0013.000000T0000Z-260918T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson ID-Madison ID-
1213 PM MDT Fri Sep 18 2026

...FLASH FLOOD WARNING FOR THE BIG ROCK BURN SCAR IS CANCELLED FOR
SOUTHEASTERN JEFFERSON AND SOUTH CENTRAL MADISON COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose an
immediate threat. Please continue to heed remaining road closures.

There is potential for an additional round of showers and
thunderstorms later today.

A Flood Watch remains in effect until 1200 AM MDT Saturday for
portions of central, eastern, and southeast Idaho.

&&

LAT...LON 4366 11172 4367 11173 4368 11172 4366 11170
      4366 11167 4367 11165 4365 11163 4364 11164
      4364 11165 4363 11166 4363 11169 4364 11169
      4365 11171

$$

TAX