Alert archive / Idaho / Flash Flood Warnings in 2021
Flash Flood Warning 3, NWS Pocatello, ID
NWS Pocatello, ID issued this flash flood warning at Jul 27, 2021, 4:32 PM MDT for Bear Lake County, Franklin County, Idaho. It was in force for 115 min. 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 27, 2021, 4:32 PM MDT (22:32 UTC)
- Expired
- Jul 27, 2021, 6:27 PM MDT
- In force
- 115 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bear Lake County, ID, Franklin County, ID
The radar
The Salt Lake City radar (KMTX), 118 km from the middle of the area, began a volume at 22:36 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 10.5 hours before the alert went out and 146 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.
- Mixed-layer CAPE
- 80 J/kg
- Mixed-layer CIN
- -313 J/kg
- Mixed-layer LCL
- 1998 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
271
WGUS55 KPIH 272232
FFWPIH
IDC007-041-280145-
/O.NEW.KPIH.FF.W.0003.210727T2232Z-210728T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pocatello ID
432 PM MDT Tue Jul 27 2021
The National Weather Service in Pocatello has issued a
* Flash Flood Warning for...
Southwestern Bear Lake County in southeastern Idaho...
Southeastern Franklin County in southeastern Idaho...
* Until 745 PM MDT.
* At 432 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Saint Charles and Minnetonka Cave.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 4213 11158 4213 11139 4200 11141 4200 11157
4200 11160
FLASH FLOOD...RADAR INDICATED
$$
DH1 follow-up statement
898
WGUS75 KPIH 280027
FFSPIH
Flash Flood Statement
National Weather Service Pocatello ID
627 PM MDT Tue Jul 27 2021
IDC007-041-280037-
/O.CAN.KPIH.FF.W.0003.000000T0000Z-210728T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bear Lake ID-Franklin ID-
627 PM MDT Tue Jul 27 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN BEAR LAKE AND
SOUTHEASTERN FRANKLIN COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 4213 11158 4213 11139 4200 11141 4200 11157
4200 11160
$$
DHThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 2:05 AM MDT | Red Flag Warning | PIH | Custer, Idaho, Lemhi, Valley | 20 hr |
| Jul 27, 3:05 PM MDT | Flash Flood Warning | PIH | Cassia | 3 hr |
| Jul 27, 3:31 PM MDT | Special Weather Statement | PIH | Bear Lake | 44 min |
| Jul 27, 4:12 PM MDT | Special Weather Statement | PIH | Bear Lake | 48 min |
Nearby
Flash Flood Warnings in Idaho, 2021Every 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.