Alert archive / Idaho / Flash Flood Warnings in 2011
Flash Flood Warning 3, NWS Missoula, MT
NWS Missoula, MT issued this flash flood warning at Jul 12, 2011, 1:46 PM MDT for Lemhi County, Idaho. It was in force for 59 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 12, 2011, 1:46 PM MDT (19:46 UTC)
- Expired
- Jul 12, 2011, 2:45 PM MDT
- In force
- 59 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
- Flood severity
- None
County Lemhi County, ID
The radar
The Pocatello radar (KSFX), 217 km from the middle of the area, began a volume at 19:47 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
Boise Airport, ID (KBOI), launched 12:00Z, 7.8 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2316 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -46 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
951 WGUS55 KMSO 121946 FFWMSO IDC059-122045- /O.NEW.KMSO.FF.W.0003.110712T1946Z-110712T2045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MISSOULA MT 146 PM MDT TUE JUL 12 2011 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL LEMHI COUNTY IN EAST CENTRAL IDAHO... * UNTIL 245 PM MDT. * AT 143 PM MDT...DOPPLER RADAR AND THE PUBLIC INDICATED FLASH FLOODING OVER THE WARNED AREA. * THE WILL REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING...MUD AND DEBRIS FLOWS ARE IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. && LAT...LON 4492 11401 4483 11388 4464 11393 4477 11410 $$ GIBSON
2 follow-up statements
838 WGUS75 KMSO 122023 FFSMSO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 223 PM MDT TUE JUL 12 2011 IDC059-122045- /O.CON.KMSO.FF.W.0003.000000T0000Z-110712T2045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LEMHI ID- 223 PM MDT TUE JUL 12 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM MDT FOR CENTRAL LEMHI COUNTY... AT 212 PM MDT...THUNDERSTORMS HAVE MOVED AWAY FROM THE WARNED AREA. EARLIER STRONG THUNDERSTORMS PRODUCED HEAVY RAIN WITH FLASH FLOODING REPORTED ON THE HIGH 93 CORRIDOR IN LEMHI COUNTY NORTH OF CHALLIS. ROCKS AND DEBRIS MAY BE IMPACTING THE HIGHWAY 93 CORRIDOR AND SURROUNDING AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT TUESDAY EVENING FOR EAST CENTRAL IDAHO AND WEST CENTRAL MONTANA. LAT...LON 4492 11401 4483 11388 4464 11393 4477 11410 $$ GIBSON
545 WGUS75 KMSO 122041 FFSMSO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 241 PM MDT TUE JUL 12 2011 IDC059-122050- /O.EXP.KMSO.FF.W.0003.000000T0000Z-110712T2045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LEMHI ID- 241 PM MDT TUE JUL 12 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 245 PM MDT/145 PM PDT/ FOR CENTRAL LEMHI COUNTY... HEAVY RAIN HAS ENDED BUT RUNOFF FROM THE HEAVY RAIN COULD STILL CREATE ADDITIONAL FLOODING IMPACTS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT TUESDAY EVENING FOR EAST CENTRAL IDAHO AND WEST CENTRAL MONTANA. LAT...LON 4492 11401 4483 11388 4464 11393 4477 11410 $$ KITSMILLER
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:04 PM MDT | Areal Flood Advisory | MSO | Lemhi | 100 min |
| Jul 12, 4:55 PM MDT | Areal Flood Advisory | MSO | Lemhi | 3 hr |
Nearby
Flash Flood Warnings in Idaho, 2011Every flash flood warning in 2011
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.