Alert archive / Idaho / Flash Flood Warnings in 2021

Flash Flood Warning 1, NWS Pocatello, ID

July 3, 2021Cassia County, Idaho

NWS Pocatello, ID issued this flash flood warning at Jul 3, 2021, 3:19 PM MDT for Cassia County, Idaho. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 3, 2021, 3:19 PM MDT (21:19 UTC)
Expired: Jul 3, 2021, 6:15 PM MDT
In force: 3 hr
Issued by: NWS Pocatello, ID
Area: Storm-based polygon
Flood severity: None

County Cassia County, ID

The radar

The Pocatello radar (KSFX), 148 km from the middle of the area, began a volume at 21:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Elko, NV (KLKN), launched 12:00Z, 9.3 hours before the alert went out and 154 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2567 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

416 
WGUS55 KPIH 032119
FFWPIH
IDC031-040015-
/O.NEW.KPIH.FF.W.0001.210703T2119Z-210704T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pocatello ID
319 PM MDT Sat Jul 3 2021

The National Weather Service in Pocatello has issued a

* Flash Flood Warning for...
  The Badger Fire Burn Area in...
  Southwestern Cassia County in southeastern Idaho...

* Until 615 PM MDT.

* At 319 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain over the Badger Fire Burn Area. Flash flooding is 
  ongoing or expected to begin shortly.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Rock Creek. The debris flow can consist of rock, 
mud, vegetation and other loose materials.

  HAZARD...Flash flooding caused by thunderstorms in and around
           the Badger Fire Burn Area.

  SOURCE...Doppler radar.

  IMPACT...Flooding of areas in and around the Badger Fire Burn
           Area.

* Some locations that will experience flash flooding include...
  Oakley Reservoir and Bostetter Ranger Station.

This includes the following Active Fire Incidents...
	First Fork.

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 Badger Fire 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.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

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 4241 11415 4236 11404 4226 11393 4220 11391
      4214 11394 4204 11406 4204 11428 4242 11429

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.25-0.5 INCHES IN 30 MINUTES

$$

DH

2 follow-up statements

062 
WGUS75 KPIH 032227
FFSPIH

Flash Flood Statement
National Weather Service Pocatello ID
427 PM MDT Sat Jul 3 2021

IDC031-040015-
/O.CON.KPIH.FF.W.0001.000000T0000Z-210704T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cassia ID-
427 PM MDT Sat Jul 3 2021

...FLASH FLOOD WARNING FOR THE BADGER FIRE BURN AREA REMAINS IN 
EFFECT UNTIL 615 PM MDT THIS EVENING FOR SOUTHWESTERN CASSIA 
COUNTY...

At 427 PM MDT, Doppler radar indicated thunderstorms have ended over 
the Badger Fire Burn Area. Flash flooding is ongoing or expected to 
begin shortly.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Rock Creek. The debris flow can consist of rock, 
mud, vegetation and other loose materials.

HAZARD...Flash flooding caused by thunderstorms in and around the
         Badger Fire Burn Area.

SOURCE...Doppler radar.

IMPACT...Flooding of areas in and around the Badger Fire Burn
         Area.

Some locations that will experience flash flooding include...
  Oakley Reservoir and Bostetter Ranger Station.

This includes the following Active Fire Incidents...
	First Fork.

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 Badger Fire 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.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

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 4241 11415 4236 11404 4226 11393 4220 11391
      4214 11394 4204 11406 4204 11428 4242 11429

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.25-0.5 INCHES IN 30 MINUTES

$$

DH

910 
WGUS75 KPIH 040007
FFSPIH

Flash Flood Statement
National Weather Service Pocatello ID
607 PM MDT Sat Jul 3 2021

IDC031-040017-
/O.EXP.KPIH.FF.W.0001.000000T0000Z-210704T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cassia ID-
607 PM MDT Sat Jul 3 2021

...FLASH FLOOD WARNING FOR THE BADGER FIRE BURN AREA WILL EXPIRE AT 
615 PM MDT THIS EVENING FOR SOUTHWESTERN CASSIA COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat.

LAT...LON 4241 11415 4236 11404 4226 11393 4220 11391
      4214 11394 4204 11406 4204 11428 4242 11429

$$

DH

The office that day

Everything else NWS Pocatello, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 3:45 PM MDT	Special Weather Statement	PIH	Franklin, Oneida	45 min
Jul 3, 5:21 PM MDT	Special Weather Statement	PIH	Franklin	54 min

Nearby

Flash Flood Warnings in Idaho, 2021 Every flash flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.