Alert archive / Montana / Red Flag Warnings in 2021

Red Flag Warning 7, NWS Glasgow, MT

April 29, 202112 counties in Montana

NWS Glasgow, MT issued this red flag warning at Apr 29, 2021, 2:42 PM MDT for 12 counties in Montana. It took effect at Apr 30, 2021, 11:00 AM MDT. It was in force for 14 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: Apr 29, 2021, 2:42 PM MDT (20:42 UTC)
In effect from: Apr 30, 2021, 11:00 AM MDT
Expired: May 1, 2021, 12:40 AM MDT
In force: 14 hr
Issued by: NWS Glasgow, MT

Counties Daniels County, MT, Dawson County, MT, Garfield County, MT, McCone County, MT, Petroleum County, MT, Phillips County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT

The radar

The Glasgow radar (KGGW), 77 km from the middle of the area, began a volume at 20:43 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
Apr 30, 3:29 PM MDT	WILDFIRE	2 Sse Brockton, MT	LOCATION ESTIMATED FROM SATELLITE AND RADAR IMAGES. WILDFIRE SILL ONGOING AS OF 330PM MDT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 8.7 hours before the alert went out and 76 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1987 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

350 
WWUS85 KGGW 292042
RFWGGW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Glasgow MT
242 PM MDT Thu Apr 29 2021

MTZ120-122-134-136-300845-
/O.UPG.KGGW.FW.A.0006.210430T1800Z-210501T0400Z/
/O.NEW.KGGW.FW.W.0007.210430T1700Z-210501T0300Z/
/O.NEW.KGGW.FW.A.0007.210501T2000Z-210502T0200Z/
Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties-
Dawson/McCone/Prairie/Richland/Wibaux Counties-
Northern Valley and Northern Phillips Counties-
The Lower Missouri River Breaks including the Charles M Russell
National Wildlife Refuge-
242 PM MDT Thu Apr 29 2021

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MDT FRIDAY FOR
STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE WEATHER 
ZONES 120, 122, 134, AND 136... 
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH 
SATURDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY VALUES 
FOR FIRE WEATHER ZONES 120, 122, 134, AND 136...

The National Weather Service in Glasgow has issued a Red Flag
Warning for strong winds and low relative humidity values, which 
is in effect from 11 AM to 9 PM MDT Friday. A Fire Weather Watch 
has also been issued. This Fire Weather Watch is for gusty winds 
and low relative humidity values is in effect from Saturday 
afternoon through Saturday evening. The Fire Weather Watch for 
Friday is no longer in effect.

* AFFECTED AREA...Fire Weather Zones 120, 122, 134 and 136.

* TIMING... Friday afternoon and evening (Warning) and Saturday
  afternoon and evening (Watch).

* WINDS...West 20 to 30 mph with gusts up to 50 mph.

* RELATIVE HUMIDITY...As low as 8 percent.

* TEMPERATURES...In the mid 80s.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

Please advise the appropriate officials or fire crews in these
areas of this Fire Weather Watch.

&&

$$

MTZ135-137-300845-
/O.UPG.KGGW.FW.A.0006.210430T1800Z-210501T0400Z/
/O.NEW.KGGW.FW.W.0007.210430T1700Z-210501T0300Z/
The Little Rockies-
Southern Petroleum and Southern Garfield Counties-
242 PM MDT Thu Apr 29 2021

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MDT FRIDAY FOR
STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE WEATHER 
ZONES 135 AND 137...

The National Weather Service in Glasgow has issued a Red Flag
Warning for strong winds and low relative humidity values, which 
is in effect from 11 AM to 9 PM MDT Friday. The Fire Weather Watch
is no longer in effect.

* AFFECTED AREA...Fire Weather Zones 135 and 137.

* TIMING... Friday afternoon and evening.

* WINDS...West 15 to 25 mph with gusts up to 50 mph.

* RELATIVE HUMIDITY...As low as 11 percent.

* TEMPERATURES...In the mid 70s in the higher elevations of the
  Little Rockies, and the mid 80s elsewhere.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

&&

$$

http://www.weather.gov/glasgow

4 follow-up statements

127 
WWUS85 KGGW 300842
RFWGGW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Glasgow MT
242 AM MDT Fri Apr 30 2021

.Warm, dry and windy conditions are expected today across the
region leading to critical fire weather conditions. Cooler temperatures,
higher relative humidity, and weaker winds will improve conditions
for Saturday, but may still result in elevated fire concerns.

MTZ120-122-134-136-302045-
/O.CON.KGGW.FW.W.0007.210430T1700Z-210501T0300Z/
/O.CON.KGGW.FW.A.0007.210501T2000Z-210502T0200Z/
Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties-
Dawson/McCone/Prairie/Richland/Wibaux Counties-
Northern Valley and Northern Phillips Counties-
The Lower Missouri River Breaks including the Charles M Russell
National Wildlife Refuge-
242 AM MDT Fri Apr 30 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
9 PM MDT THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY
VALUES FOR FIRE WEATHER ZONES 120, 122, 134, AND 136...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH SATURDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE
HUMIDITY VALUES FOR FIRE WEATHER ZONES 120, 122, 134, AND 136...

* AFFECTED AREA...Fire Weather Zones 120, 122, 134 and 136.

* TIMING... This afternoon and evening (Warning) and Saturday 
  afternoon and evening (Watch).

* WINDS...West 20 to 30 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 10 percent.

* TEMPERATURES...In the mid 70s to mid 80s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

Please advise the appropriate officials or fire crews in these
areas of this Fire Weather Watch.

&&

$$

MTZ135-137-302045-
/O.CON.KGGW.FW.W.0007.210430T1700Z-210501T0300Z/
The Little Rockies-
Southern Petroleum and Southern Garfield Counties-
242 AM MDT Fri Apr 30 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
9 PM MDT THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY
VALUES FOR FIRE WEATHER ZONES 135 AND 137...

* AFFECTED AREA...Fire Weather Zones 135 and 137.

* TIMING... This afternoon and evening.

* WINDS...West 20 to 30 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 12 percent.

* TEMPERATURES...In the mid 80s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

&&

$$

http://www.weather.gov/glasgow

876 
WWUS85 KGGW 302012
RFWGGW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Glasgow MT
212 PM MDT Fri Apr 30 2021

.Warm, dry and windy conditions will linger into the southern
zones late tonight. Cooler temperatures, higher relative 
humidity, and weaker winds will improve conditions for Saturday, 
but may still result in elevated fire concerns.

MTZ122-010900-
/O.EXT.KGGW.FW.W.0007.000000T0000Z-210501T0900Z/
/O.CON.KGGW.FW.A.0007.210501T2000Z-210502T0200Z/
Dawson/McCone/Prairie/Richland/Wibaux Counties-
212 PM MDT Fri Apr 30 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 3 AM MDT SATURDAY FOR
STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE WEATHER 
ZONE 122... 

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY 
AFTERNOON THROUGH SATURDAY EVENING FOR STRONG WINDS 
AND LOW RELATIVE HUMIDITY VALUES FOR FIRE WEATHER ZONE 122...

* AFFECTED AREA...Fire Weather Zone 122.

* TIMING... Through 3 AM (Warning) and Saturday afternoon and 
  evening (Watch).

* WINDS...West 15 to 25 mph with gusts up to 45 mph then to 30 mph
  after midnight tonight.

* RELATIVE HUMIDITY...As low as 10 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

Please advise the appropriate officials or fire crews in these
areas of this Fire Weather Watch.

&&

$$

MTZ137-010900-
/O.EXT.KGGW.FW.W.0007.000000T0000Z-210501T0900Z/
Southern Petroleum and Southern Garfield Counties-
212 PM MDT Fri Apr 30 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 3 AM MDT SATURDAY FOR
STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE WEATHER 
ZONE 137...

* AFFECTED AREA...Fire Weather Zone 137.

* TIMING... This afternoon and evening.

* WINDS...West 10 to 20 mph with gusts up to 45 mph then to 30 mph
  after midnight tonight.

* RELATIVE HUMIDITY...As low as 11 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

&&

$$

MTZ120-134-136-010900-
/O.CON.KGGW.FW.W.0007.000000T0000Z-210501T0300Z/
/O.CON.KGGW.FW.A.0007.210501T2000Z-210502T0200Z/
Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties-
Northern Valley and Northern Phillips Counties-
The Lower Missouri River Breaks including the Charles M Russell
National Wildlife Refuge-
212 PM MDT Fri Apr 30 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE 
WEATHER ZONES 120, 134, AND 136... 

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON 
THROUGH SATURDAY EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY
VALUES FOR FIRE WEATHER ZONES 120, 134, AND 136...

* AFFECTED AREA...Fire Weather Zones 120, 134 and 136.

* TIMING... Through this evening (Warning) and Saturday afternoon
  and evening (Watch).

* WINDS...West 15 to 25 mph with gusts up to 45 mph then to 30 mph
  after midnight tonight.

* RELATIVE HUMIDITY...As low as 10 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

Please advise the appropriate officials or fire crews in these
areas of this Fire Weather Watch.

&&

$$

MTZ135-010300-
/O.CON.KGGW.FW.W.0007.000000T0000Z-210501T0300Z/
The Little Rockies-
212 PM MDT Fri Apr 30 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE 
WEATHER ZONE 135...

* AFFECTED AREA...Fire Weather Zone 135.

* TIMING... This afternoon and evening.

* WINDS...West 15 to 25 mph with gusts up to 50 mph then to 30 mph
  after midnight tonight.

* RELATIVE HUMIDITY...As low as 14 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

&&

$$

http://www.weather.gov/glasgow

528 
WWUS85 KGGW 010248
RFWGGW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Glasgow MT
848 PM MDT Fri Apr 30 2021

.Dry and windy conditions will linger into the area through
Saturday morning. Cooler temperatures, higher relative humidity, 
and weaker winds will improve conditions for Saturday, but may 
still result in elevated fire concerns.

MTZ120-122-134-136-011200-
/O.EXT.KGGW.FW.W.0007.000000T0000Z-210501T1200Z/
/O.CON.KGGW.FW.A.0007.210501T2000Z-210502T0200Z/
Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties-
Dawson/McCone/Prairie/Richland/Wibaux Counties-
Northern Valley and Northern Phillips Counties-
The Lower Missouri River Breaks including the Charles M Russell
National Wildlife Refuge-
848 PM MDT Fri Apr 30 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 6 AM MDT SATURDAY FOR
STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE WEATHER 
ZONES 120, 122, 134, AND 136... 

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON 
THROUGH SATURDAY EVENING FOR STRONG WINDS AND LOW RELATIVE 
HUMIDITY VALUES FOR FIRE WEATHER ZONES 120, 122, 134, AND 136...

* AFFECTED AREA...Fire Weather Zones 120, 122, 134 and 136.

* TIMING... Through Saturday morning (Warning) and Saturday 
  afternoon and evening (Watch).

* WINDS...West 5 to 15 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 15 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning and Fire Weather Watch.

&&

$$

MTZ135-137-011200-
/O.EXT.KGGW.FW.W.0007.000000T0000Z-210501T1200Z/
The Little Rockies-
Southern Petroleum and Southern Garfield Counties-
848 PM MDT Fri Apr 30 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 6 AM MDT SATURDAY FOR 
STRONG WINDS AND LOW RELATIVE HUMIDITY VALUES FOR FIRE WEATHER 
ZONES 135 AND 137...

* AFFECTED AREA...Fire Weather Zones 135 and 137.

* TIMING... This afternoon and evening.

* WINDS...West 5 to 10 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 15 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Red Flag Warning.

&&

$$

http://www.weather.gov/glasgow

878 
WWUS85 KGGW 010640
RFWGGW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Glasgow MT
1240 AM MDT Sat May 1 2021

.Diminishing wind speeds and rising relative humidity have lowered
the fire weather threat across the region for early this morning.
Elevated fire weather conditions are expected for a portion of the
region later today.

MTZ120-122-134-136-011845-
/O.CAN.KGGW.FW.W.0007.000000T0000Z-210501T1200Z/
/O.CON.KGGW.FW.A.0007.210501T2000Z-210502T0200Z/
Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties-
Dawson/McCone/Prairie/Richland/Wibaux Counties-
Northern Valley and Northern Phillips Counties-
The Lower Missouri River Breaks including the Charles M Russell
National Wildlife Refuge-
1240 AM MDT Sat May 1 2021

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM THIS AFTERNOON
THROUGH THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY
VALUES FOR FIRE WEATHER ZONES 120, 122, 134, AND 136...

...RED FLAG WARNING IS CANCELLED FOR FIRE WEATHER ZONES 120, 122,
134, AND 136...

The National Weather Service in Glasgow has cancelled the Red
Flag Warning.

* AFFECTED AREA...Fire Weather Zones 120, 122, 134 and 136.

* TIMING...Watch remains in effect for this afternoon and evening.
 
* WINDS...West 5 to 15 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 21 percent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please advise the appropriate officials or fire crews in these
areas of this Fire Weather Watch.

&&

$$

MTZ135-137-010745-
/O.CAN.KGGW.FW.W.0007.000000T0000Z-210501T1200Z/
The Little Rockies-
Southern Petroleum and Southern Garfield Counties-
1240 AM MDT Sat May 1 2021

...RED FLAG WARNING IS CANCELLED FOR FIRE WEATHER ZONES 135 AND 
137...

The National Weather Service in Glasgow has cancelled the Red
Flag Warning.

Diminishing wind speeds and rising relative humidity have lowered
the fire weather threat across the region. Therefore the Red Flag
Waring has been cancelled.  

$$

http://www.weather.gov/glasgow

The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 2:42 PM MDT	Fire Weather Watch	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	37 hr
Apr 29, 2:51 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	51 hr

Nearby

Red Flag Warnings in Montana, 2021 Every red flag warning in 2021

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.