Alert archive / Montana / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 11, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at May 12, 2007, 6:22 PM MDT for Liberty County, Montana. It was in force for 23 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
- May 12, 2007, 6:22 PM MDT (00:22 UTC)
- Expired
- May 12, 2007, 6:45 PM MDT
- In force
- 23 min
- Issued by
- NWS Great Falls, MT
- Area
- Counties, with a storm outline in the text
County Liberty County, MT
The radar
The Great Falls radar (KTFX), 125 km from the middle of the area, began a volume at 00:23 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, 0.4 hours before the alert went out and 127 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
- 7 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 2492 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 325 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 May 12, 5:20 PM MDT, 1 hour 2 minutes earlier.
Area forecast discussion, May 12, 5:20 PM MDT, 1 hour 2 minutes before
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</html>Hazardous weather outlook, May 12, 2:40 PM MDT, 3 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 240 PM MDT SAT MAY 12 2007 MTZ011>014-047>055-132045- HILL-CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-BLAINE- SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON-JUDITH BASIN-FERGUS- JEFFERSON-BROADWATER-MEAGHER-GALLATIN- 240 PM MDT SAT MAY 12 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA...NORTH CENTRAL MONTANA AND SOUTHWEST MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP OVER SOUTHWEST AND NORTH CENTRAL MONTANA LATE THIS AFTERNOON AND EVENING. SOME OF THE STORMS WILL BECOME SEVERE...PRODUCING LARGE HAIL. ALONG WITH THE LARGE HAIL...A FEW OF THE SEVERE STORMS MAY PRODUCE DAMAGING WIND GUSTS. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A PACIFIC WEATHER SYSTEM WILL MOVE INTO THE AREA FOR SUNDAY THROUGH MONDAY. THIS SYSTEM WILL BRING COOLER AND MORE MOIST AIR INTO THE AREA FOR A BETTER CHANCE OF PRECIPITATION...BUT LESS OF A CHANCE FOR THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ008-015-132045- BEAVERHEAD-MADISON- 240 PM MDT SAT MAY 12 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP OVER SOUTHWEST MONTANA LATE THIS AFTERNOON. SOME OF THE STORMS WILL BE STRONG...PRODUCING SMALL HAIL AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A PACIFIC WEATHER SYSTEM WILL MOVE INTO THE AREA FOR SUNDAY THROUGH MONDAY. THIS SYSTEM WILL BRING COOLER AND MORE MOIST AIR INTO THE AREA FOR A BETTER CHANCE OF PRECIPITATION...BUT LESS OF A CHANCE FOR THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ009-010-044>046-132045- NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-TOOLE-LIBERTY- EASTERN PONDERA- 240 PM MDT SAT MAY 12 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP OVER NORTHERN MONTANA LATE THIS AFTERNOON AND THIS EVENING. SOME OF THE STORMS WILL BE STRONG...PRODUCING SMALL HAIL AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A PACIFIC WEATHER SYSTEM WILL MOVE INTO THE AREA FOR SUNDAY THROUGH MONDAY. THIS SYSTEM WILL BRING COOLER AND MORE MOIST AIR INTO THE AREA FOR A BETTER CHANCE OF PRECIPITATION...BUT LESS OF A CHANCE FOR THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
In the hours before
Local storm report, May 12, 5:42 PM MDT, 40 minutes before
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</html>Local storm report, May 12, 5:48 PM MDT, 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
548 PM MDT SAT MAY 12 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0535 PM HAIL LEWISTOWN 47.06N 109.43W
05/12/2007 E0.25 INCH FERGUS MT TRAINED SPOTTER
PEA SIZE HAIL FALLING IN THE LEWISTOWN AREA.
&&
BRUSDALocal storm report, May 12, 5:57 PM MDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
557 PM MDT SAT MAY 12 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0556 PM HEAVY RAIN STANFORD 47.15N 110.22W
05/12/2007 M1.00 INCH JUDITH BASIN MT TRAINED SPOTTER
&&
SAUCIERThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 2:48 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 18 min |
| May 13, 3:18 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 42 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2007Every severe thunderstorm warning in 2007
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.