Alert archive / Montana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 27, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jun 23, 2011, 9:29 PM MDT for Garfield County, McCone County, Montana. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 23, 2011, 9:29 PM MDT (03:29 UTC)
- Expired
- Jun 23, 2011, 10:30 PM MDT
- In force
- 61 min
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
Counties Garfield County, MT, McCone County, MT
The radar
The Glasgow radar (KGGW), 85 km from the middle of the area, began a volume at 03:32 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
Great_falls, MT (KTFX), launched 00:00Z, 3.5 hours before the alert went out and 316 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
- 40 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -60 m²/s²
- 0-3 km storm-relative helicity
- -48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 23, 9:18 PM MDT, 11 minutes earlier.
Area forecast discussion, Jun 23, 9:18 PM MDT, 11 minutes before
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</html>Hazardous weather outlook, Jun 23, 3:16 PM MDT, 6 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 316 PM MDT THU JUN 23 2011 MTZ016>027-059>062-241000- CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY- DANIELS-SHERIDAN-WESTERN ROOSEVELT-PETROLEUM-GARFIELD-MCCONE- RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN PHILLIPS- SOUTHWEST PHILLIPS-NORTHERN VALLEY-EASTERN ROOSEVELT- 316 PM MDT THU JUN 23 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT NUMEROUS THUNDERSTORMS ARE EXPECTED TONIGHT. SOME OF THE STORMS MAY BECOME SEVERE...WITH LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINFALL WITH FREQUENT LIGHTNING BEING THE MAIN THREATS. THE HEAVIEST RAINFALL RATES...UP TO 2 INCHES PER 3 HOURS..ARE EXPECTED SOUTH OF THE MISSOURI RIVER. FLASH FLOODING WILL BE POSSIBLE. AREAS OF LOWLAND AND RIVER FLOODING PERSIST ALONG THE MUSSELSHELL...MILK...AND MISSOURI RIVERS. FLOOD WARNINGS REMAIN IN EFFECT. A LAKE WIND ADVISORY IS IN EFFECT FOR FORT PECK LAKE UNTIL MIDNIGHT TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY HEAVY RAIN SHOWERS WILL LINGER NEAR THE NORTH DAKOTA BORDER THROUGH FRIDAY MORNING WHICH MAY INCREASE FLOOD CONCERNS THERE. NO HAZARDOUS WEATHER IS EXPECTED. SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
In the hours before
Local storm report, Jun 23, 8:05 PM MDT, 1 hour 24 minutes before
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</html>The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 6:54 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 66 min |
| Jun 23, 6:59 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 61 min |
| Jun 23, 7:44 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 61 min |
| Jun 23, 8:00 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Phillips, Valley | 60 min |
| Jun 23, 8:46 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 59 min |
| Jun 23, 9:03 PM MDT | Special Weather Statement | GGW | Valley | 57 min |
| Jun 23, 9:53 PM MDT | Special Weather Statement | GGW | Valley | 52 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2011Every severe thunderstorm 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.