Alert archive / Montana / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 14, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 3, 2009, 8:51 PM MDT for Blaine County, Montana. It was in force for 40 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 3, 2009, 8:51 PM MDT (02:51 UTC)
- Expired
- Jul 3, 2009, 9:31 PM MDT
- In force
- 40 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
County Blaine County, MT
The radar
The Glasgow radar (KGGW), 174 km from the middle of the area, began a volume at 02:51 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, 2.9 hours before the alert went out and 176 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
- 548 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 2246 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 57 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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 3, 5:48 PM MDT, 3 hours 3 minutes earlier.
Area forecast discussion, Jul 3, 5:48 PM MDT, 3 hours 3 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 423 AM MDT FRI JUL 3 2009 MTZ009-010-044>046-048-049-041030- NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-TOOLE-LIBERTY- EASTERN PONDERA-SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON- 423 AM MDT FRI JUL 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL MONTANA. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING...SOME STORMS MAY BE STRONG WITH GUSTY WINDS AND SMALL HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE ON SATURDAY AND SUNDAY AS MOISTURE AND INSTABILITY INCREASE. SOME STORMS MAY BECOME STRONG AND PRODUCE GUSTY WINDS AND HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ008-011>015-047-050>055-041030- BEAVERHEAD-HILL-CASCADE-CHOUTEAU- CENTRAL AND SOUTHERN LEWIS AND CLARK-MADISON-BLAINE-JUDITH BASIN- FERGUS-JEFFERSON-BROADWATER-MEAGHER-GALLATIN- 423 AM MDT FRI JUL 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA...NORTH CENTRAL MONTANA AND SOUTHWEST MONTANA. .DAY ONE...TODAY AND TONIGHT SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED THUNDERSTORMS ARE POSSIBLE AGAIN ON SATURDAY WITH SOME STRONG STORMS PRODUCING GUSTY WINDS AND HAIL. THE THREAT FOR HAZARDOUS WEATHER IS EXPECTED TO DECREASE FOR SUNDAY THROUGH THURSDAY. .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 3, 4:43 PM MDT, 4 hours 8 minutes before
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</html>Special weather statement, Jul 3, 5:31 PM MDT, 3 hours 20 minutes before
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</html>Local storm report, Jul 3, 5:57 PM MDT, 2 hours 54 minutes before
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</html>Special weather statement, Jul 3, 7:51 PM MDT, 1 hour before
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</html>Special weather statement, Jul 3, 8:34 PM MDT, 17 minutes before
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</html>The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 7:51 PM MDT | Special Weather Statement | TFX | Broadwater | 54 min |
| Jul 3, 8:34 PM MDT | Special Weather Statement | TFX | 56 min | |
| Jul 4, 1:56 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 49 min |
| Jul 4, 2:21 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 39 min |
| Jul 4, 2:29 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 30 min |
| Jul 4, 2:34 PM MDT | Special Weather Statement | TFX | Judith Basin | 41 min |
| Jul 4, 2:44 PM MDT | Special Weather Statement | TFX | Cascade | 46 min |
| Jul 4, 3:00 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 45 min |
| Jul 4, 3:50 PM MDT | Special Weather Statement | TFX | Cascade | 40 min |
| Jul 4, 4:06 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 39 min |
| Jul 4, 4:13 PM MDT | Special Weather Statement | TFX | Glacier | 47 min |
| Jul 4, 4:16 PM MDT | Special Weather Statement | TFX | Judith Basin | 59 min |
| Jul 4, 4:23 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 37 min |
| Jul 4, 4:35 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus | 40 min |
| Jul 4, 4:53 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 37 min |
| Jul 4, 5:03 PM MDT | Special Weather Statement | TFX | Glacier | 42 min |
| Jul 4, 5:21 PM MDT | Special Weather Statement | TFX | Hill | 39 min |
| Jul 4, 5:21 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 24 min |
| Jul 4, 5:29 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 5 min |
| Jul 4, 5:35 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 25 min |
| Jul 4, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 29 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2009Every severe thunderstorm warning in 2009
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.