Alert archive / Idaho / Flash Flood Warnings in 2017
Flash Flood Warning 2, NWS Pocatello, ID
NWS Pocatello, ID issued this flash flood warning at Aug 23, 2017, 2:34 PM MDT for Bannock County, Power 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
- Aug 23, 2017, 2:34 PM MDT (20:34 UTC)
- Expired
- Aug 23, 2017, 5:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bannock County, ID, Power County, ID
The radar
The Pocatello radar (KSFX), 43 km from the middle of the area, began a volume at 20:35 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, 8.6 hours before the alert went out and 224 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
- 114 J/kg
- Mixed-layer CIN
- -227 J/kg
- Mixed-layer LCL
- 2053 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
711 WGUS55 KPIH 232034 FFWPIH IDC005-077-232330- /O.NEW.KPIH.FF.W.0002.170823T2034Z-170823T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Pocatello ID 234 PM MDT WED AUG 23 2017 The National Weather Service in Pocatello has issued a * Flash Flood Warning for... Central Bannock County in southeastern Idaho... East central Power County in southeastern Idaho... * Until 530 PM MDT * At 230 PM MDT, Doppler radar indicated heavy rain approaching the Powerline Fire burn scar area. Doppler Radar indicates the potential for two inch per hour or greater rainfall rates. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Fort Hall Bannock Creek Lodge and the Rattlesnake Creek Drainage Region within the Powerline Burn Scar area. Excessive rainfall over the burn scar will result in debris flow moving through the Rattlesnake Creek Drainage near Rattlesnake Road. The debris flow can consist of rock, mud, ash, vegetation and other loose materials. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay away or be swept away. River banks and culverts can become unstable and unsafe. Move away from recently burned areas. Life-threatening flooding of creeks, roads and normally dry arroyos is likely. The heavy rains will likely trigger rockslides, mudslides and debris flows in steep terrain, especially in and around these areas. A Flash Flood Warning means that flooding is imminent or occurring. If you are in the warned area move to higher ground immediately. Residents living along streams and creeks should take immediate precautions to protect life and property. && LAT...LON 4285 11246 4256 11248 4257 11260 4283 11284 $$ AD/DMH
1 follow-up statement
737 WGUS75 KPIH 232223 FFSPIH Flash Flood Statement National Weather Service Pocatello ID 423 PM MDT WED AUG 23 2017 IDC005-077-232231- /O.CAN.KPIH.FF.W.0002.000000T0000Z-170823T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bannock ID-Power ID- 423 PM MDT WED AUG 23 2017 ...THE FLASH FLOOD WARNING FOR CENTRAL BANNOCK AND EAST CENTRAL POWER COUNTIES IS CANCELLED... The heavy rain has ended. Flooding is no longer expected to pose an immediate threat. Doppler Radar indicates up to one and a half inches of rain may have fell over for southeast portions of the burn area. LAT...LON 4285 11246 4256 11248 4257 11260 4283 11284 $$ AD/VALLE
The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 1:05 PM MDT | Special Weather Statement | PIH | Oneida | 55 min |
| Aug 23, 1:55 PM MDT | Special Weather Statement | PIH | Power | 50 min |
| Aug 23, 2:43 PM MDT | Special Weather Statement | PIH | Oneida | 47 min |
| Aug 23, 2:52 PM MDT | Special Weather Statement | PIH | Oneida | 38 min |
| Aug 23, 3:16 PM MDT | Special Weather Statement | PIH | Bannock | 44 min |
| Aug 23, 3:50 PM MDT | Special Weather Statement | PIH | Cassia | 40 min |
| Aug 23, 4:07 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 38 min |
Nearby
Flash Flood Warnings in Idaho, 2017Every flash flood warning in 2017
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.