Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 14, NWS Glasgow, MT
NWS Glasgow, MT issued this red flag warning at Jun 10, 2021, 3:47 AM MDT for 5 counties in Montana. It took effect at Jun 10, 2021, 11:00 AM MDT. It was in force for 9 hr. 16 reports 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
- Jun 10, 2021, 3:47 AM MDT (09:47 UTC)
- In effect from
- Jun 10, 2021, 11:00 AM MDT
- Expired
- Jun 10, 2021, 7:51 PM MDT
- In force
- 9 hr
- Issued by
- NWS Glasgow, MT
Counties Dawson County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Wibaux County, MT
The radar
The Glasgow radar (KGGW), 159 km from the middle of the area, began a volume at 09:48 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 |
|---|---|---|---|
| Jun 10, 3:33 PM MDT | HAIL 1.5 | 18 W Sidney, MT | . |
| Jun 10, 3:33 PM MDT | HAIL 1.5 | 18 W Sidney, MT | |
| Jun 10, 4:22 PM MDT | HAIL 1.5 | Sidney, MT | CORRECTS PREVIOUS HAIL REPORT FROM SIDNEY. CONTINUED PEA SIZE HAIL, WITH BRIEFLY UP TO PING PONG BALL SIZE. |
| Jun 10, 4:22 PM MDT | HAIL 1.75 | Sidney, MT | CONTINUED PEA SIZE HAIL, WITH BRIEFLY UP TO PING PONG BALL SIZE. |
| Jun 10, 4:30 PM MDT | HAIL 2 | 5 Sse Sidney, MT | 2 INCH HAIL ALONG LOST HIGHWAY IN SIDNEY. REPORT FROM SOCIAL MEDIA. |
| Jun 10, 5:50 PM MDT | HAIL 1.75 | 22 N Wibaux, MT | QUARTER TO GOLF BALL SIZE HAIL. |
| Jun 10, 6:16 PM MDT | HAIL 1.75 | 9 Ene Savage, MT | . |
| Jun 10, 6:16 PM MDT | HAIL 1.75 | 9 Ene Savage, MT | |
| Jun 10, 6:30 PM MDT | HAIL 1.75 | 5 Ese Savage, MT | LOCATION AND TIME ESTIMATED. HAIL RANGED FROM THE SIZE OF PEAS TO GOLF BALLS. LARGEST HAIL OCCURRED ROUGHLY 6:30PM, BUT HAIL WAS ON AND OFF FROM 5:20PM TO 8PM. |
| Jun 10, 7:39 PM MDT | NON-TSTM WND DMG | 8 W Mccloud, MT | SEMI BLOWN OVER ON ITS SIDE 27 MILES SOUTH OF BROCKWAY. TIME ESTIMATED FROM RADAR. FROM SOCIAL MEDIA. |
| Jun 10, 7:52 PM MDT | NON-TSTM WND GST 60 | 2 E Fort Peck, MT | ALONG FRONTAL PASSAGE- MESONET STATION GGWFP 2.4 E FORT PECK (GGWWFO). |
| Jun 10, 7:55 PM MDT | TSTM WND DMG | 10 Wnw Mccloud, MT | ASH TREES BROKEN ABOUT HALFWAY UP. APPLE TREES AND AN 80-YEAR-OLD SPRUCE TREE BLOWN DOWN. |
| Jun 10, 7:55 PM MDT | HAIL 3 | 10 Wnw Mccloud, MT | 3 INCH HAIL AND TORRENTIAL RAINFALL. |
| Jun 10, 8:00 PM MDT | HAIL 2 | 19 Nw Terry, MT | . |
| Jun 10, 8:00 PM MDT | HAIL 2 | 19 Nw Terry, MT | |
| Jun 10, 8:00 PM MDT | HAIL 2.75 | 10 Nnw Mccloud, MT | SOCIAL MEDIA REPORT OF MOSTLY GOLF BALL SIZED HAIL WITH THE BIGGEST PIECE BEING BASEBALL SIZED. TIME ESTIMATED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 9.8 hours before the alert went out and 329 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
- 1026 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 1598 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
374 WWUS85 KGGW 100947 RFWGGW URGENT - FIRE WEATHER MESSAGE National Weather Service Glasgow MT 347 AM MDT Thu Jun 10 2021 ...CRITICAL FIRE WEATHER CONCERNS TODAY... MTZ137-101100- /O.CAN.KGGW.FW.A.0011.210610T1700Z-210611T0200Z/ Southern Petroleum and Southern Garfield Counties- 347 AM MDT Thu Jun 10 2021 ...FIRE WEATHER WATCH IS CANCELLED FOR GUSTY WINDSW AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 137... The National Weather Service in Glasgow has cancelled the Fire Weather Watch. Humidity is expected to mostly recover before the stronger frontal winds arrive from the west this afternoon. $$ MTZ122-110200- /O.UPG.KGGW.FW.A.0011.210610T1700Z-210611T0200Z/ /O.NEW.KGGW.FW.W.0014.210610T1700Z-210611T0200Z/ Dawson/McCone/Prairie/Richland/Wibaux Counties- 347 AM MDT Thu Jun 10 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 122... The National Weather Service in Glasgow has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 11 AM this morning to 8 PM MDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 122, mainly south of MT- Highway 200. * TIMING...Late this morning to early this evening. * WINDS...From the south 20 to 30 mph with gusts up to 40 mph early, then from the west at 30 to 40 mph with gusts up to 50 mph later. * RELATIVE HUMIDITY...As low as 13 percent. * TEMPERATURES...Mid 90s to lower 100s. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/glasgow
1 follow-up statement
933 WWUS85 KGGW 110151 RFWGGW URGENT - FIRE WEATHER MESSAGE National Weather Service Glasgow MT 751 PM MDT Thu Jun 10 2021 MTZ122-110300- /O.CAN.KGGW.FW.W.0014.000000T0000Z-210611T0200Z/ Dawson/McCone/Prairie/Richland/Wibaux Counties- 751 PM MDT Thu Jun 10 2021 ...RED FLAG WARNING IS CANCELLED FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 122... The National Weather Service in Glasgow has cancelled the Red Flag Warning. Relative humidity has recovered over the warned area, and for this reason the Red Flag Warning is canceled. $$ http://www.weather.gov/glasgow
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Glasgow, MT wrote its last area forecast discussion before this red flag warning went out at Jun 9, 9:28 PM MDT, 6 hours 19 minutes earlier.
Area forecast discussion, Jun 9, 9:28 PM MDT, 6 hours 19 minutes before
Area Forecast Discussion National Weather Service Glasgow MT 928 PM MDT Wed Jun 9 2021 .DISCUSSION... Today is the lull between storms, with severe potential once again Thursday with all modes of severe possible. In addition, locally heavy rainfall is once again possible Thursday afternoon and evening. In addition, there's a chance for some severe storms tonight in the far northern and western portions of the CWA. Tonight... Showers and thunderstorms should enter the CWA late this evening and overnight tonight, with some gusty winds and small hail possible with any storms that do develop. In addition, the environmental winds will begin to pick up area-wide, which will be enough to reach Lake Wind Advisory criteria over Fort Peck Lake. Some lingering showers and thunder is possible in the northeast (Daniels and Sheridan Counties) from whatever's left over from the overnight convection. Thursday through Friday.... CAMs guidance in fairly good agreement in developing storms tomorrow afternoon over the eastern half of the CWA in the ballpark of 3 PM MDT. In addition, storms will be developing over Central Montana as well, so there will be a dry slot in between the two areas of convection. The eastern line will move into North Dakota during the evening while the convection in Central Montana spreads across the area. WPC has outlooked roughly the eastern half of the CWA for a marginal risk of excessive rainfall, with a slight risk roughly east of a Scobey to Wibaux line: this seems reasonable given the doubleshot of storms this part of the area should get, and a Flash Flood Watch may be needed in later forecast packages. SPC has the eastern half of the CWA under an enhanced risk, with a hatched area for winds and hail (with the hatched hail area for almost all of the area): this also is reasonable given the convective parameters that are setting up. After the storms move out, the gusty environmental winds will continue into Friday and temperatures will be much cooler than it was today or what it will be on Thursday. Saturday and beyond... Upper level ridging will begin to build in, leading to rising temperatures through the weekend into early next week. The peak of the heat currently appears to be Monday and Tuesday. Dry weather will return as well. 97 && .AVIATION... FLIGHT CONDITIONS: Periods of MVFR ceilings are possible Thursday morning at KGGW and KOLF. VFR conditions expected Thursday afternoon. LLWS: Possible overnight tonight just before sunrise at KSDY and KGDV. Possible again at all terminals Thursday evening into Friday morning. WINDS: E 15-20 kts overnight tonight. SE-E 15-25 kts Thursday morning, switching to the W-NW 15-25kts, gusts 30-35kts by afternoon. SYNOPSIS: A round of showers and thunderstorms will impact Phillips, Petroleum and Valley counties overnight, possibly impacting KGGW by early morning. Debris clouds left over from these overnight storms may lower ceilings to MVFR conditions at the western terminals. Ceilings lift by noon Thursday but widespread showers and thunderstorms will develop by afternoon with some of the storms becoming severe. The storms will begin to push out of the area by midnight and should exit into North Dakota by Friday morning. RMB && .GLASGOW WATCHES/WARNINGS/ADVISORIES... Fire Weather Watch from Thursday morning through Thursday evening for MTZ122-137. Lake Wind Advisory from 3 AM Thursday to 7 PM MDT Friday For Fort Peck Lake for Central and Southeast Phillips...Central and Southern Valley...Garfield...McCone...Petroleum. && weather.gov/glasgow
In the hours before
Special weather statement, Jun 9, 10:16 PM MDT, 5 hours 31 minutes before
Special Weather Statement
National Weather Service Glasgow MT
1016 PM MDT Wed Jun 9 2021
MTZ016-060-100500-
Southwest Phillips MT-Central and Southeast Phillips MT-
1016 PM MDT Wed Jun 9 2021
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PHILLIPS COUNTY UNTIL
1100 PM MDT...
At 1015 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles northeast of Hays, or 12 miles north of Zortman, moving
northeast at 30 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Dodson and Phillips.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
A Severe Thunderstorm Watch remains in effect until midnight MDT for
northeastern Montana.
LAT...LON 4822 10843 4822 10841 4837 10841 4845 10831
4825 10788 4796 10840 4798 10844
TIME...MOT...LOC 0415Z 223DEG 27KT 4809 10845
NWS Glasgow
ruxSpecial weather statement, Jun 9, 10:37 PM MDT, 5 hours 10 minutes before
Special Weather Statement
National Weather Service Glasgow MT
1037 PM MDT Wed Jun 9 2021
MTZ059-100515-
Northern Phillips MT-
1037 PM MDT Wed Jun 9 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL PHILLIPS COUNTY
UNTIL 1115 PM MDT...
At 1036 PM MDT, Doppler radar was tracking a strong thunderstorm near
Turner, or 31 miles west of Whitewater, moving northeast at 40 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Loring, Port Of Morgan and Chapman.
A Severe Thunderstorm Watch remains in effect until midnight MDT for
northeastern Montana.
LAT...LON 4900 10763 4885 10752 4867 10832 4874 10832
4874 10826 4891 10826 4891 10823 4898 10824
4900 10817
TIME...MOT...LOC 0436Z 244DEG 33KT 4878 10833
NWS GlasgowSpecial weather statement, Jun 9, 11:56 PM MDT, 3 hours 51 minutes before
Special Weather Statement
National Weather Service Glasgow MT
1156 PM MDT Wed Jun 9 2021
MTZ016-059-060-100730-
Southwest Phillips MT-Central and Southeast Phillips MT-
Northern Phillips MT-
1156 PM MDT Wed Jun 9 2021
...SIGNIFICANT WEATHER ADVISORY FOR PHILLIPS COUNTY UNTIL 130 AM
MDT...
At 1156 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles northeast of Hays to 15 miles
southeast of Malta. Movement was north at 45 mph.
Pea size hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Malta, Whitewater, Zortman, Dodson, Fourchette, Loring, Port Of
Morgan, Phillips, Chapman, Sleeping Buffalo, Wagner, Landusky, Sun
Prairie and Bowdoin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4792 10889 4792 10863 4799 10861 4798 10843
4845 10841 4843 10836 4874 10832 4875 10826
4900 10824 4900 10721 4762 10784 4759 10834
4768 10878 4773 10889
TIME...MOT...LOC 0556Z 199DEG 39KT 4810 10842 4821 10762
NWS Glasgow
BLMThe office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 6:56 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 64 min |
| Jun 9, 7:51 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 54 min |
| Jun 9, 8:30 PM MDT | Special Weather Statement | GGW | 45 min | |
| Jun 9, 8:33 PM MDT | Special Weather Statement | GGW | Petroleum | 42 min |
| Jun 9, 8:44 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 61 min |
| Jun 9, 9:18 PM MDT | Special Weather Statement | GGW | 42 min | |
| Jun 9, 9:32 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum, Phillips | 58 min |
| Jun 9, 10:16 PM MDT | Special Weather Statement | GGW | Phillips | 44 min |
| Jun 9, 10:25 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum, Phillips | 65 min |
| Jun 9, 10:37 PM MDT | Special Weather Statement | GGW | 38 min | |
| Jun 9, 10:38 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 67 min |
| Jun 9, 11:28 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 25 min |
| Jun 9, 11:56 PM MDT | Special Weather Statement | GGW | Phillips | 94 min |
| Jun 10, 2:32 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 16 min |
| Jun 10, 3:14 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Roosevelt, Sheridan | 61 min |
| Jun 10, 3:27 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 63 min |
| Jun 10, 3:31 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan | 59 min |
| Jun 10, 3:41 PM MDT | Tornado Warning | GGW | Richland | 34 min |
| Jun 10, 4:05 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 55 min |
| Jun 10, 4:12 PM MDT | Tornado Warning | GGW | Richland, Roosevelt | 33 min |
| Jun 10, 4:22 PM MDT | Special Weather Statement | GGW | 38 min | |
| Jun 10, 4:23 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 67 min |
| Jun 10, 4:38 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt, Wibaux | 45 min |
| Jun 10, 5:21 PM MDT | Special Weather Statement | GGW | Garfield | 39 min |
| Jun 10, 5:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 61 min |
| Jun 10, 5:54 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 66 min |
Nearby
Red Flag Warnings in Montana, 2021Every 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.