Alert archive / Montana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 80, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jul 16, 2011, 5:57 PM MDT for Petroleum County, Phillips County, Montana. It was in force for 63 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
- Jul 16, 2011, 5:57 PM MDT (23:57 UTC)
- Expired
- Jul 16, 2011, 7:00 PM MDT
- In force
- 63 min
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
Counties Petroleum County, MT, Phillips County, MT
The radar
The Glasgow radar (KGGW), 123 km from the middle of the area, began a volume at 23:55 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 12:00Z, 12.0 hours before the alert went out and 191 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
- 2068 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Jul 16, 5:15 PM MDT, 42 minutes earlier.
Area forecast discussion, Jul 16, 5:15 PM MDT, 42 minutes before
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</html>Hazardous weather outlook, Jul 16, 3:06 AM MDT, 14 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 306 AM MDT SAT JUL 16 2011 MTZ016>027-059>062-171000- 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- 306 AM MDT SAT JUL 16 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST MONTANA. .DAY ONE...TODAY AND TONIGHT A CHANCE FOR STRONG THUNDERSTORMS EXISTS THIS EVENING FOR AREAS WEST OF FORT PECK LAKE. ISOLATED SEVERE STORMS ARE NOT OUT OF THE QUESTION... WITH LARGE HAIL... DAMAGING WINDS AND HEAVY RAIN. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THIS WEEKEND WILL START A WARMING TREND THAT WILL LAST THROUGH AT LEAST TUESDAY OF NEXT WEEK. TEMPERATURES WILL BE IN THE MID 90S BY SUNDAY AND REACH INTO NEAR TRIPLE DIGITS ACROSS MUCH OF NORTHEAST MONTANA ON MONDAY AND TUESDAY. PERSONS ARE ADVISED TO TAKE PRECAUTIONS TO DEAL WITH THE HEAT... SUCH AS LIMITING TIME OUTDOORS AND DRINKING PLENTY OF WATER. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
In the hours before
Local storm report, Jul 16, 4:17 PM MDT, 1 hour 40 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 |
|---|---|---|---|---|
| Jul 15, 6:36 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 54 min |
| Jul 15, 7:30 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 60 min |
| Jul 15, 8:30 PM MDT | Special Weather Statement | GGW | Valley | 60 min |
| Jul 15, 8:38 PM MDT | Special Weather Statement | GGW | 67 min | |
| Jul 15, 9:40 PM MDT | Flash Flood Warning | GGW | Dawson, McCone, Prairie | 4 hr |
| Jul 15, 9:50 PM MDT | Special Weather Statement | GGW | Dawson | 55 min |
| Jul 15, 10:06 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 54 min |
| Jul 16, 1:52 AM MDT | Flash Flood Warning | GGW | Dawson, McCone, Richland | 3 hr |
| Jul 16, 3:17 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 58 min |
| Jul 16, 4:15 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 60 min |
| Jul 16, 5:11 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 37 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.