Alert archive / Montana / Flash Flood Warnings in 2012
Flash Flood Warning 5, NWS Missoula, MT
NWS Missoula, MT issued this flash flood warning at Jul 16, 2012, 3:08 PM MDT for Granite County, Ravalli County, Montana. It was in force for 112 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 16, 2012, 3:08 PM MDT (21:08 UTC)
- Expired
- Jul 16, 2012, 5:00 PM MDT
- In force
- 112 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Granite County, MT, Ravalli County, MT
The radar
The Missoula radar (KMSX), 87 km from the middle of the area, began a volume at 21:10 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
Spokane, WA (KOTX), launched 12:00Z, 9.1 hours before the alert went out and 251 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
- 136 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 888 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 295 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
779 WGUS55 KMSO 162108 FFWMSO MTC039-081-162300- /O.NEW.KMSO.FF.W.0005.120716T2108Z-120716T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MISSOULA MT 308 PM MDT MON JUL 16 2012 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN RAVALLI COUNTY IN WEST CENTRAL MONTANA... WESTERN GRANITE COUNTY IN WEST CENTRAL MONTANA... * UNTIL 500 PM MDT. * AT 302 PM MDT...DOPPLER RADAR INDICATED FLASH FLOODING OVER THE WARNED AREA. STRONG THUNDERSTORMS CONTINUE TO DEVELOP AND PRODUCE HEAVY RAINFALL NEAR AND OVER SKALKAHO PASS. * LOCATIONS IMPACTED INCLUDE...SKALKAHO PASS. 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. IN RUGGED TERRAIN THERE ARE MANY LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. && LAT...LON 4634 11394 4634 11368 4616 11368 4616 11394 $$ DICKERSON
1 follow-up statement
575 WGUS75 KMSO 162253 FFSMSO FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 453 PM MDT MON JUL 16 2012 MTC039-081-162301- /O.EXP.KMSO.FF.W.0005.000000T0000Z-120716T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GRANITE MT-RAVALLI MT- 453 PM MDT MON JUL 16 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 500 PM MDT/400 PM PDT/ FOR EASTERN RAVALLI AND WESTERN GRANITE COUNTIES... ALTHOUGH LIGHT RAIN WILL CONTINUE TO AFFECT SKALKAHO PASS THROUGH THE EVENING...STRONG THUNDERSTORMS CAPABLE OF TORRENTIAL RAIN HAVE LEFT THE AREA THUS ENDING THE THREAT OF FLASH FLOODING FOR NOW. ADDITIONAL STRONG STORMS WITH HEAVY RAIN MAY BE POSSIBLE YET AGAIN LATER TONIGHT. LAT...LON 4634 11394 4634 11368 4616 11368 4616 11394 $$ DICKERSON
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 2:42 PM MDT | Flash Flood Warning | MSO | Silver Bow | 93 min |
| Jul 16, 3:04 PM MDT | Flash Flood Watch | MSO | Deer Lodge, Granite, Lake, Mineral, Missoula, Powell and 3 more | 5 hr |
Nearby
Flash Flood Warnings in Montana, 2012Every flash flood warning in 2012
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.