Alert archive / Montana / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS Missoula, MT
NWS Missoula, MT issued this flash flood warning at Feb 3, 2011, 4:41 PM MST for Missoula County, Montana. It was in force for 46 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
- Feb 3, 2011, 4:41 PM MST (23:41 UTC)
- Expired
- Feb 3, 2011, 5:27 PM MST
- In force
- 46 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
- Flood severity
- None
County Missoula County, MT
The radar
The Missoula radar (KMSX), 9 km from the middle of the area, began a volume at 23:47 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
Spokane, WA (KOTX), launched 12:00Z, 11.7 hours before the alert went out and 203 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
- 1737 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
810
WGUS55 KMSO 032341
FFWMSO
MTC063-040145-
/O.NEW.KMSO.FF.W.0002.110203T2341Z-110204T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
441 PM MST THU FEB 3 2011
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
RATTLESNAKE CREEK IN MISSOULA COUNTY OF WEST CENTRAL MONTANA...
* UNTIL 645 PM MST.
* AT 430 PM MST...LAW ENFORCEMENT OFFICIALS REPORTED AN ICE JAM
BREAK ON RATTLESNAKE CREEK. TREES AND LOGS AND ICE ARE MOVING AT A
FAST RATE DOWN THE CREEK TOWARD THE CITY OF MISSOULA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS 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.
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.
&&
LAT...LON 4711 11396 4702 11382 4690 11382 4690 11391
4685 11400 4696 11397
$$1 follow-up statement
436
WGUS75 KMSO 040027
FFSMSO
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
527 PM MST THU FEB 3 2011
MTC063-040035-
/O.CAN.KMSO.FF.W.0002.000000T0000Z-110204T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MISSOULA MT-
527 PM MST THU FEB 3 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR THE RATTLESNAKE
CREEK IN CENTRAL MISSOULA COUNTY...
SHERIFF REPORTS THE WATER HAS CRESTED AND REMAINS IN THE BANKS OF
THE RATTLESNAKE CREEK. THERE HAS BEEN NO PROPERTY DAMAGE. THUS THE
FLASH FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 4711 11396 4702 11382 4690 11382 4690 11391
4685 11400 4696 11397
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 3, 1:32 PM MST | Winter Weather Advisory | MSO | Flathead, Granite, Lake, Mineral, Missoula, Powell and 2 more | 30 hr |
Nearby
Flash Flood Warnings in Montana, 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.