Alert archive / Montana / Red Flag Warnings in 2011
Red Flag Warning 9, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Sep 11, 2011, 3:17 AM MDT for 14 counties in Montana. It took effect at Sep 11, 2011, 12:00 PM MDT. It was in force for 10 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 11, 2011, 3:17 AM MDT (09:17 UTC)
- In effect from
- Sep 11, 2011, 12:00 PM MDT
- Expired
- Sep 11, 2011, 10:00 PM MDT
- In force
- 10 hr
- Issued by
- NWS Great Falls, MT
Counties Blaine County, MT, Cascade County, MT, Chouteau County, MT, Fergus County, MT, Glacier County, MT, Hill County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Meagher County, MT, Phillips County, MT, Pondera County, MT, Teton County, MT, Toole County, MT
The radar
The Great Falls radar (KTFX), 63 km from the middle of the area, began a volume at 09:15 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 11, 7:56 PM MDT | NON-TSTM WND GST 49 | 3 Sw Cut Bank, MT | WIND GUST OF 49 MPH WITH FRONTAL PASSAGE MEASURED BY ASOS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 9.3 hours before the alert went out and 51 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
- 4111 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
190 WWUS85 KTFX 110917 RFWTFX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE GREAT FALLS MT 317 AM MDT SUN SEP 11 2011 MTZ112>115-117-112200- /O.UPG.KTFX.FW.A.0006.110911T1800Z-110912T0400Z/ /O.NEW.KTFX.FW.W.0009.110911T1800Z-110912T0400Z/ EASTERN GLACIER/TOOLE/CENTRAL AND EASTERN PONDERA/LIBERTY COUNTIES-HILL AND BLAINE COUNTIES- LEWIS AND CLARK NATIONAL FOREST ROCKY MOUNTAIN DISTRICT/ROCKY MOUNTAIN FRONT-CHOUTEAU AND FERGUS COUNTIES- CENTRAL AND EASTERN LEWIS AND CLARK NATIONAL FOREST AREAS- 317 AM MDT SUN SEP 11 2011 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOLLOWED BY A COLD FRONTAL PASSAGE WITH A STRONG WIND SHIFT FOR FIRE WEATHER ZONES 112...113...114...115 AND 117... THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A RED FLAG WARNING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOLLOWED BY A COLD FRONTAL PASSAGE WITH A STRONG WIND SHIFT...WHICH IS IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS EVENING. THE FIRE WEATHER WATCH HAS BEEN REPLACED BY THIS WARNING. * AFFECTED AREA...FIRE WEATHER ZONES 112...113...114...115 AND 117. * WINDS...WEST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH. * RELATIVE HUMIDITY...AS LOW AS 10 PERCENT. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW RELATIVE HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON AND EVENING. THESE CONDITIONS WILL BE FOLLOWED BY A STRONG WIND SHIFT TO THE NORTH AS A COLD FRONT PUSHES THROUGH THE DISTRICTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THESE AREAS OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/GREATFALLS
2 follow-up statements
042 WWUS85 KTFX 112101 RFWTFX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE GREAT FALLS MT 301 PM MDT SUN SEP 11 2011 MTZ112>115-117-120400- /O.CON.KTFX.FW.W.0009.000000T0000Z-110912T0400Z/ EASTERN GLACIER/TOOLE/CENTRAL AND EASTERN PONDERA/LIBERTY COUNTIES-HILL AND BLAINE COUNTIES- LEWIS AND CLARK NATIONAL FOREST ROCKY MOUNTAIN DISTRICT/ROCKY MOUNTAIN FRONT-CHOUTEAU AND FERGUS COUNTIES- CENTRAL AND EASTERN LEWIS AND CLARK NATIONAL FOREST AREAS- 301 PM MDT SUN SEP 11 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOLLOWED BY A COLD FRONTAL PASSAGE WITH A STRONG WIND SHIFT FOR FIRE WEATHER ZONES 112...113...114...115 AND 117... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 112...113...114...115 AND 117. * WINDS...WEST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH. * RELATIVE HUMIDITY...AS LOW AS 11 PERCENT. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW RELATIVE HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON AND EVENING. THESE CONDITIONS WILL BE FOLLOWED BY A STRONG WIND SHIFT TO THE NORTH AS A COLD FRONT PUSHES THROUGH THE DISTRICTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THESE AREAS OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/GREATFALLS
967 WWUS85 KTFX 120336 RFWTFX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE GREAT FALLS MT 936 PM MDT SUN SEP 11 2011 MTZ112>115-117-120445- /O.EXP.KTFX.FW.W.0009.000000T0000Z-110912T0400Z/ EASTERN GLACIER/TOOLE/CENTRAL AND EASTERN PONDERA/LIBERTY COUNTIES-HILL AND BLAINE COUNTIES- LEWIS AND CLARK NATIONAL FOREST ROCKY MOUNTAIN DISTRICT/ROCKY MOUNTAIN FRONT-CHOUTEAU AND FERGUS COUNTIES- CENTRAL AND EASTERN LEWIS AND CLARK NATIONAL FOREST AREAS- 936 PM MDT SUN SEP 11 2011 ...RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOLLOWED BY A COLD FRONTAL PASSAGE WITH A STRONG WIND SHIFT FOR FIRE WEATHER ZONES 112...113...114... 115 AND 117... THE RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING. A CANADIAN COLD FRONT MOVED ACROSS THE CANADIAN BORDER EARLY SUNDAY EVENING. VERY STRONG AND GUSTY WINDS HAVE ACCOMPANIED THIS FRONT ALTHOUGH RELATIVE HUMIDITIES DROPPED RAPIDLY AS THE FRONT PASSED. STRONG AND GUSTY WINDS ARE EXPECTED TO MOVE INTO CENTRAL MONTANA LATER THIS EVENING. WINDS WILL REMAIN BRISK BUT BECAUSE OF RAPIDLY RISING RELATIVE HUMIDITIES...THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 10 THIS EVENING. MUCH COOLER TEMPERATURES AND HIGHER RELATIVE HUMIDITIES ARE FORECAST FOR MONDAY. $$ HTTP://WEATHER.GOV/GREATFALLS
Nearby
Red Flag Warnings in Montana, 2011Every red flag 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.