Alert archive / Montana / Red Flag Warnings in 2012

Red Flag Warning 21, NWS Glasgow, MT

August 25, 20124 counties in Montana

NWS Glasgow, MT issued this red flag warning at Aug 25, 2012, 3:20 AM MDT for 4 counties in Montana. It took effect at Aug 25, 2012, 12:00 PM MDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 25, 2012, 3:20 AM MDT (09:20 UTC)
In effect from
Aug 25, 2012, 12:00 PM MDT
Expired
Aug 25, 2012, 9:00 PM MDT
In force
9 hr
Issued by
NWS Glasgow, MT

Counties Daniels County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT

The radar

The Glasgow radar (KGGW), 95 km from the middle of the area, began a volume at 09:20 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

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 9.3 hours before the alert went out and 93 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.

Skew-T log-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 2012-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 2012-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -106 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1 J/kg
Mixed-layer CIN
-245 J/kg
Mixed-layer LCL
2291 m above ground
0-6 km bulk shear
77 kt
0-1 km storm-relative helicity
-106 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

833 
WWUS85 KGGW 250920
RFWGGW

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE GLASGOW MT
320 AM MDT SAT AUG 25 2012

MTZ120-252200-
/O.NEW.KGGW.FW.W.0021.120825T1800Z-120826T0300Z/
FORT PECK RESERVATION-DANIELS-ROOSEVELT-SHERIDAN-
320 AM MDT SAT AUG 25 2012

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITIES FOR FIRE 
WEATHER ZONE 120...

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A RED FLAG
WARNING FOR STRONG WINDS AND LOW RELATIVE HUMIDITIES... WHICH IS
IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING.

* AFFECTED AREA...FIRE WEATHER ZONE 120.

* WINDS...WEST 20 TO 25 MPH WITH GUSTS UP TO 35 MPH.

* TIMING...WEST WINDS WILL BEGIN TO RAMP UP BY LATE MORNING...
  PEAK DURING THE AFTERNOON AND DIMINISH DURING THE EVENING.

* RELATIVE HUMIDITY...AS LOW AS 18 PERCENT.

* TEMPERATURES...IN THE UPPER 60S.

* IMPACTS...THE COMBINATION OF LOW HUMIDITY... GUSTY WINDS... AND
  DRY FUELS WILL CREATE THE POTENTIAL FOR EXPLOSIVE FIRE GROWTH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THESE
AREAS OF THIS RED FLAG WARNING.

&&

$$

HTTP://WEATHER.GOV/GLASGOW
2 follow-up statements
658 
WWUS85 KGGW 252038
RFWGGW

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE GLASGOW MT
238 PM MDT SAT AUG 25 2012

MTZ120-260300-
/O.CON.KGGW.FW.W.0021.000000T0000Z-120826T0300Z/
FORT PECK RESERVATION-DANIELS-ROOSEVELT-SHERIDAN-
238 PM MDT SAT AUG 25 2012

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
120...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING.

* AFFECTED AREA...FIRE WEATHER ZONE 120.

* WINDS...WEST 15 TO 25 MPH WITH GUSTS UP TO 35 MPH.

* TIMING...WEST WINDS PERSIST THROUGH THE AFTERNOON AND DIMINISH
  DURING THE EVENING.

* RELATIVE HUMIDITY...AS LOW AS 19 PERCENT.

* TEMPERATURES...AROUND 70.

* IMPACTS...THE COMBINATION OF LOW HUMIDITY...GUSTY WINDS... AND
  DRY FUELS WILL CREATE THE POTENTIAL FOR EXPLOSIVE FIRE GROWTH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THESE
AREAS OF THIS RED FLAG WARNING.

&&

$$

HTTP://WEATHER.GOV/GLASGOW
445 
WWUS85 KGGW 260251
RFWGGW

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE GLASGOW MT
851 PM MDT SAT AUG 25 2012


MTZ120-260400-
/O.EXP.KGGW.FW.W.0021.000000T0000Z-120826T0300Z/
FORT PECK RESERVATION-DANIELS-ROOSEVELT-SHERIDAN-
851 PM MDT SAT AUG 25 2012

...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR
STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
120...

THE RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING. 

AS TEMPERATURES COOL THIS EVENING...RELATIVE HUMIDITY VALUES HAVE
RECOVERED SUFFICIENTLY AND WINDS HAVE LIGHTENED ENOUGH TO LET THE
RED FLAG WARNING EXPIRE AS PLANNED.

$$

HTTP://WEATHER.GOV/GLASGOW

Nearby

Red Flag Warnings in Montana, 2012Every red flag 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.