564 
WGUS55 KPIH 131758
FFWPIH
IDC051-065-132000-
/O.NEW.KPIH.FF.W.0005.260813T1758Z-260813T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pocatello ID
1158 AM MDT Thu Aug 13 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 200 PM MDT.

* At 1158 AM MDT, Doppler radar indicated thunderstorms producing
  heavy rain over the Big Rock Burn Scar. 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

$$

McKaughan

153 
WGUS55 KPIH 131925
FFWPIH
IDC051-065-132100-
/O.EXT.KPIH.FF.W.0005.000000T0000Z-260813T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pocatello ID
125 PM MDT Thu Aug 13 2026

The National Weather Service in Pocatello has extended the

* Flash Flood Warning for...
  The Big Rock burn scar in...
  Southeastern Jefferson County in southeastern Idaho...
  South Central Madison County in southeastern Idaho...

* Until 300 PM MDT.

* At 125 PM MDT, Emergency management reported thunderstorms
  producing heavy rain over the Big Rock Burn Scar. Between 0.25 and
  0.5 inches of rain have fallen. Additional rainfall amounts of 0.1
  to 0.2 inches are possible in the warned area. Flash flooding is
  already occurring. Snake River Rd. and Heise Road have water and
  debris on the roadway.

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...Emergency management reported.

  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.

Be aware of your surroundings and do not drive on flooded roads.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

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...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

McKaughan

809 
WGUS75 KPIH 132057
FFSPIH

Flash Flood Statement
National Weather Service Pocatello ID
257 PM MDT Thu Aug 13 2026

IDC051-065-132107-
/O.EXP.KPIH.FF.W.0005.000000T0000Z-260813T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson ID-Madison ID-
257 PM MDT Thu Aug 13 2026

...FLASH FLOOD WARNING FOR THE BIG ROCK BURN SCAR WILL EXPIRE AT 3 PM
MDT THIS AFTERNOON FOR SOUTHEASTERN JEFFERSON AND SOUTH CENTRAL
MADISON COUNTIES...

The heavy rain has ended but impacts from earlier flooding remain in
place across the area. Please continue to heed remaining road
closures.

A Flash Flood Watch remains in effect for the burn scar area until
1000 PM MDT Thursday.

&&

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

$$

McKaughan