Alert archive / Montana / Areal Flood Warnings in 2011
Areal Flood Warning 21, NWS Missoula, MT
NWS Missoula, MT issued this areal flood warning at Jun 7, 2011, 9:51 AM MDT for Missoula County, Ravalli County, Montana. It was in force for 3 days. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 7, 2011, 9:51 AM MDT (15:51 UTC)
- Expired
- Jun 10, 2011, 11:47 AM MDT
- In force
- 3 days
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Missoula County, MT, Ravalli County, MT
The radar
The Missoula radar (KMSX), 28 km from the middle of the area, began a volume at 15:52 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, 3.9 hours before the alert went out and 201 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
- 2 J/kg
- Mixed-layer CIN
- -304 J/kg
- Mixed-layer LCL
- 834 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
993
WGUS45 KMSO 071551
FLWMSO
FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
951 AM MDT TUE JUN 7 2011
MTC063-081-081545-
/O.NEW.KMSO.FA.W.0021.110607T1551Z-110608T1545Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
951 AM MDT TUE JUN 7 2011
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* FLOOD WARNING FOR BITTERROOT RIVER NEAR MISSOULA IN...
SOUTH CENTRAL MISSOULA COUNTY IN WEST CENTRAL MONTANA...
* UNTIL FURTHER NOTICE.
* AT 9:45 AM TUESDAY THE STAGE WAS 9.5 FEET.
* MINOR FLOODING IS FORECAST.
* FLOOD STAGE IS 11.0 FEET.
* FORECAST...RIVER WILL EXCEED FLOOD STAGE OF 11.0 FEET BY WEDNESDAY
MORNING...AND THEN CONTINUE TO RISE BETWEEN 11.0 AND 12.0 FEET.
* AT 12.0 FEET...FLOODING OF FARMLAND AND SOME ROADS ALONG THE
BITTERROOT RIVER FROM LOLO TO THE CONFLUENCE WITH THE CLARK FORK
RIVER IS POSSIBLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 4687 11413 4687 11408 4686 11405 4679 11400
4666 11398 4666 11414 4677 11412 4686 11415
$$4 follow-up statements
535
WGUS45 KMSO 081534 RRA
FLWMSO
BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
934 AM MDT WED JUN 8 2011
MTC063-081-081945-
/O.EXT.KMSO.FA.W.0021.000000T0000Z-110608T1945Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
934 AM MDT WED JUN 8 2011
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS EXTENDED THE
* FLOOD WARNING FOR THE BITTERROOT RIVER NEAR MISSOULA IN
NORTHERN RAVALLI COUNTY IN WEST CENTRAL MONTANA...
SOUTHERN MISSOULA COUNTY IN WEST CENTRAL MONTANA...
* UNTIL FURTHER NOTICE
* FORECAST...RIVER WILL CONTINUE TO RISE ABOVE FLOOD STAGE WEDNESDAY.
THE RIVER WILL PEAK BETWEEN 11 AND 12 FEET THURSDAY NIGHT INTO FRIDAY.
* AT 12.0 FEET...FLOODING OF FARMLAND AND SOME ROADS ALONG THE
BITTERROOT RIVER FROM LOLO TO THE CONFLUENCE WITH THE CLARK FORK
RIVER IS POSSIBLE.
LAT...LON 4687 11413 4687 11408 4686 11405 4679 11400
4666 11398 4666 11414 4677 11412 4686 11415
$$988
WGUS45 KMSO 081809
FLWMSO
BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
1209 PM MDT WED JUN 8 2011
MTC063-081-091945-
/O.EXT.KMSO.FA.W.0021.000000T0000Z-110609T1945Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
1209 PM MDT WED JUN 8 2011
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS EXTENDED THE
* FLOOD WARNING FOR THE BITTERROOT RIVER NEAR MISSOULA IN
NORTHERN RAVALLI COUNTY IN WEST CENTRAL MONTANA...
SOUTHERN MISSOULA COUNTY IN WEST CENTRAL MONTANA...
* FORECAST...RIVER WILL CONTINUE TO RISE ABOVE FLOOD STAGE WEDNESDAY.
THE RIVER WILL PEAK BETWEEN 11 AND 12 FEET THURSDAY NIGHT INTO FRIDAY.
* AT 12.0 FEET...FLOODING OF FARMLAND AND SOME ROADS ALONG THE
BITTERROOT RIVER FROM LOLO TO THE CONFLUENCE WITH THE CLARK FORK
RIVER IS POSSIBLE.
LAT...LON 4687 11413 4687 11408 4686 11405 4679 11400
4666 11398 4666 11414 4677 11412 4686 11415
$$939
WGUS45 KMSO 091904
FLWMSO
BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
104 PM MDT THU JUN 9 2011
MTC063-081-101945-
/O.EXT.KMSO.FA.W.0021.000000T0000Z-110610T1945Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
104 PM MDT THU JUN 9 2011
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS EXTENDED THE
* FLOOD WARNING FOR THE BITTERROOT RIVER NEAR MISSOULA IN...
NORTHERN RAVALLI COUNTY IN WEST CENTRAL MONTANA...
SOUTHERN MISSOULA COUNTY IN WEST CENTRAL MONTANA...
* UNTIL FURTHER NOTICE.
* AT 12:45 PM THURSDAY THE STAGE WAS 11.3 FEET.
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FLOOD STAGE IS 11.0 FEET.
* FORECAST...THE RIVER LEVEL WILL REMAIN ABOVE FLOOD STAGE THROUGH
FRIDAY. READINGS WILL SLOWLY DECREASE THROUGH THE WEEKEND.
HOWEVER...RIVER LEVELS WILL CONTINUE TO FLOW FAST AND HIGH EVEN WHEN
READINGS FALL BELOW FLOOD STAGE.
* AT 11.0 FEET...FLOODING TO LOW LYING AREAS ADJACENT TO THE RIVER IS
POSSIBLE.
LAT...LON 4687 11413 4687 11408 4686 11405 4679 11400
4666 11398 4666 11414 4677 11412 4686 11415
$$533
WGUS85 KMSO 101747
FLSMSO
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1147 AM MDT FRI JUN 10 2011
MTC063-081-101756-
/O.CAN.KMSO.FA.W.0021.000000T0000Z-110610T1945Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MISSOULA MT-RAVALLI MT-
1147 AM MDT FRI JUN 10 2011
...THE FLOOD WARNING HAS BEEN CANCELLED FOR THE BITTERROOT
RIVER NEAR MISSOULA FOR SOUTHERN MISSOULA AND NORTHERN
RAVALLI COUNTIES IN WEST CENTRAL MONTANA...
THE RIVER LEVEL HAS BEGUN A SLOW DECREASE AND HAS FALLEN BELOW
FLOOD STAGE. HOWEVER...LOW LYING AREAS AROUND THE RIVER CHANNEL
MAY STILL SEE LOCALIZED FLOODING. DESPITE THE LEVEL FALLING
BELOW FLOOD STAGE...THE RIVER WILL STILL BE FLOWING HIGH AND
FAST THROUGH THE WEEKEND.
LAT...LON 4687 11413 4687 11408 4686 11405 4679 11400
4666 11398 4666 11414 4677 11412 4686 11415
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 11:35 PM MDT | Areal Flood Warning | MSO | Lincoln | 57 hr |
| Jun 7, 5:18 AM MDT | Areal Flood Warning | MSO | Ravalli | 52 hr |
| Jun 7, 9:41 AM MDT | Areal Flood Warning | MSO | Flathead | 48 hr |
| Jun 7, 9:46 AM MDT | Areal Flood Warning | MSO | Ravalli | 47 hr |
| Jun 7, 9:59 AM MDT | Areal Flood Warning | MSO | Granite, Missoula | 3 days |
| Jun 7, 10:04 AM MDT | Areal Flood Warning | MSO | Sanders | 10 days |
| Jun 7, 10:27 AM MDT | Areal Flood Warning | MSO | Lake | 70 hr |
| Jun 7, 10:33 AM MDT | Areal Flood Warning | MSO | Ravalli | 26 hr |
| Jun 7, 12:30 PM MDT | Areal Flood Warning | MSO | Granite | 47 hr |
| Jun 7, 4:33 PM MDT | Areal Flood Warning | MSO | Deer Lodge | 43 hr |
| Jun 7, 4:51 PM MDT | Areal Flood Warning | MSO | Missoula | 67 hr |
| Jun 7, 5:19 PM MDT | Areal Flood Warning | MSO | Missoula, Powell | 66 hr |
| Jun 7, 5:26 PM MDT | Areal Flood Warning | MSO | Granite, Missoula | 10 days |
| Jun 7, 5:55 PM MDT | Areal Flood Warning | MSO | Powell | 65 hr |
Nearby
Areal Flood Warnings in Montana, 2011Every areal 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.