Alert archive / Montana / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 31, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 17, 2008, 10:05 PM MDT for Fergus County, Montana. It was in force for 44 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 17, 2008, 10:05 PM MDT (04:05 UTC)
- Expired
- Jun 17, 2008, 10:49 PM MDT
- In force
- 44 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
County Fergus County, MT
The radar
The Billings radar (KBLX), 164 km from the middle of the area, began a volume at 04:04 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 17, 5:48 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 4.1 hours before the alert went out and 106 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
- 20 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 3633 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 54 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 Jun 17, 9:00 PM MDT, 1 hour 5 minutes earlier.
Area forecast discussion, Jun 17, 9:00 PM MDT, 1 hour 5 minutes before
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HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE GREAT FALLS MT 1036 AM MDT TUE JUN 17 2008 MTZ008>015-044>055-181230- BEAVERHEAD-NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL- CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-MADISON- TOOLE-LIBERTY-EASTERN PONDERA-BLAINE- SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON-JUDITH BASIN-FERGUS- JEFFERSON-BROADWATER-MEAGHER-GALLATIN- 1036 AM MDT TUE JUN 17 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA...NORTH CENTRAL MONTANA AND SOUTHWEST MONTANA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORM OUTLOOK... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF SOUTHWEST...CENTRAL...AND NORTH CENTRAL MONTANA THROUGH TONIGHT. LOCATION... THE SLIGHT RISK AREA IS GENERALLY SOUTH OF A LINE FROM CHINOOK...TO LOMA...TO LINCOLN...AND INCLUDES GREAT FALLS...LEWISTOWN... HELENA...AND BOZEMAN. TIMING... STRONG THUNDERSTORMS WILL DEVELOP BETWEEN 1 AND 3 PM THIS AFTERNOON OVER SOUTHWEST MONTANA...AND WILL INTENSIFY AS THEY MOVE NORTHEASTWARD OVER SOUTHWEST AND CENTRAL MONTANA LATE THIS AFTERNOON AND THIS EVENING. THE SEVERE THUNDERSTORM THREAT WILL SPREAD ACROSS CENTRAL MONTANA AFTER 4 PM THIS AFTERNOON...AND WILL LIKELY END ACROSS THE ENTIRE AREA BY 11 PM THIS EVENING. IMPACTS... DAMAGING WIND GUSTS OVER 70 MPH AND HAIL TO THE SIZE OF GOLF BALLS WILL BE THE PRIMARY CONCERNS WITH THE STRONGEST STORMS. INTENSE LIGHTNING AND LOCALLY HEAVY RAIN WILL ALSO BE CONCERNS. AN ISOLATED TORNADO CANNOT BE COMPLETELY RULED OUT IN CENTRAL MONTANA EARLY THIS EVENING. RECOMMENDED ACTIONS... STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE NATIONAL WEATHER SERVICE GREAT FALLS WARNING AREA SHOULD MONITOR CHANGING WEATHER CONDITIONS THROUGH TONIGHT. OTHER HAZARDOUS WEATHER... A SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT FOR PORTIONS OF CENTRAL AND SOUTHWEST MONTANA. VERY HEAVY RAIN WITH STORMS MAY CAUSE FLOODING OF LOW-LYING AND POORLY DRAINED AREAS TODAY AND TONIGHT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE WEDNESDAY AND THURSDAY AFTERNOONS ACROSS CENTRAL AND SOUTHWEST MONTANA. THE SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT THROUGH WEDNESDAY AFTERNOON. WITH ABOVE NORMAL TEMPERATURES EXPECTED FOR THE REMAINDER OF THE WEEK...INCREASED SNOWMELT IS EXPECTED OUT OF THE MOUNTAINS. AS A RESULT...RIVER...CREEK...AND STREAM LEVELS WILL REMAIN HIGH THROUGHOUT THE WEEK. THE MAIN AREAS OF CONCERN WILL BE NEAR THE MOUNTAINS. THIS SITUATION WILL CONTINUE TO BE MONITORED FOR ADDITIONAL FLOOD HIGHLIGHTS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. COHEN
In the hours before
Local storm report, Jun 17, 7:33 PM MDT, 2 hours 32 minutes before
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</html>Local storm report, Jun 17, 7:46 PM MDT, 2 hours 19 minutes before
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</html>Local storm report, Jun 17, 8:01 PM MDT, 2 hours 4 minutes before
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</html>Local storm report, Jun 17, 8:38 PM MDT, 1 hour 27 minutes before
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</html>Local storm report, Jun 17, 9:05 PM MDT, 1 hour 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 |
|---|---|---|---|---|
| Jun 17, 6:06 PM MDT | Tornado Warning | TFX | Fergus | 24 min |
| Jun 17, 6:29 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill, Liberty | 46 min |
| Jun 17, 6:29 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 16 min |
| Jun 18, 11:47 AM MDT | River Flood Warning | TFX | Gallatin | 12 days |
Nearby
Severe Thunderstorm Warnings in Montana, 2008Every severe thunderstorm warning in 2008
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.