Alert archive / Montana / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 28, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 13, 2003, 4:21 PM MDT for Judith Basin County, Montana. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 13, 2003, 4:21 PM MDT (22:21 UTC)
- Expired
- Jun 13, 2003, 5:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Great Falls, MT
- Area
- Counties, with a storm outline in the text
County Judith Basin County, MT
The radar
The Great Falls radar (KTFX), 99 km from the middle of the area, began a volume at 22:20 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 10.4 hours before the alert went out and 70 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
- 1955 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
787 WUUS55 KTFX 132221 SVRTFX MTC045-132300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 420 PM MDT FRI JUN 13 2003 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL JUDITH BASIN COUNTY IN CENTRAL MONTANA * UNTIL 500 PM MDT * AT 415 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER EAST CENTRAL MEAGHER COUNTY...OR ABOUT 19 MILES NORTHEAST OF WHITE SULPHUR SPRINGS...MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE OVER... RURAL SOUTHERN JUDITH BASIN COUNTY AT 430 PM MDT RURAL CENTRAL JUDITH BASIN COUNTY AT 450 PM MDT HAIL UP TO ONE INCH IN DIAMETER IS LIKELY WITH THIS STORM. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN GREAT FALLS. LAT...LON 4679 11060 4670 11044 4689 11013 4701 11050
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 13, 2:25 PM MDT, 1 hour 56 minutes earlier.
Area forecast discussion, Jun 13, 2:25 PM MDT, 1 hour 56 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
225 PM MDT FRI JUN 13 2003
.SHORT TERM...ACTIVE AFTERNOON AS PACIFIC COLD FRONT APPROACHING CWA
FROM THE WEST HAS HELPED KICK OFF NUMEROUS THUNDERSTORMS. SOME
STORMS MAY BECOME SEVERE. SEVERAL STORMS HAVE ALREADY PRODUCED
SMALL HAIL. SOUNDINGS INDICATE STRONG DOWNBURSTS MAY BE A PROBLEM AS
WELL. CONVECTIVE ACTIVITY LOOKS TO BE CONFINED TO FRONTAL PASSAGE
AND DECREASES TONIGHT FROM WEST TO EAST. SOUTHWEST FLOW ALOFT
PERSISTS THROUGH MONDAY AS DOES THE THREAT OF SHOWERS AND
THUNDERSTORMS EACH AFTERNOON AND EVENING. THICKNESS VALUES INDICATE
TEMPERATURES REMAIN FAIRLY STATIC THROUGH MONDAY WITH READINGS
CONTINUING ABOVE SEASONAL AVERAGES. EMANUEL
.LONG TERM...AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL BUILD OVER
THE AREA ON TUESDAY...THEN MOVE EAST ON WEDNESDAY. THIS WILL ALLOW
FOR MOSTLY DRY WEATHER TUESDAY AND WEDNESDAY. THE EXCEPTION WILL BE
OVER THE SOUTHWEST...WHERE A FEW ISOLATED THUNDERSTORMS ARE
POSSIBLE...MAINLY OVER THE MOUNTAINS. FOR THURSDAY AND
FRIDAY...EXPECT A SLIGHT CHANCE OF THUNDERSTORMS OVER THE
REGION...AS THE FLOW ALOFT WILL BE MORE WESTERLY. TEMPERATURES WILL
AVERAGE ABOUT 5 TO 10 DEGREES ABOVE NORMAL THROUGH THE PERIOD. BRUSDA
.CCF NUMBERS
GTF BB 050/078 051/080 051 08722
BBUBB 080/048 081/052 083/055 081/055 077 33330000332
CTB BB 049/075 049/077 049 08522
BBUBB 077/048 076/046 078/048 076/048 070 22330000332
HLN BB 051/080 052/082 052 08622
BBUBB 081/050 080/053 084/056 082/056 078 33330---332
BZN BB 048/080 048/082 048 08612
BBUBB 081/045 080/044 081/046 079/046 076 33331100332
WEY BB 036/075 039/076 040 08511
BBUBB 076/044 076/041 075/039 073/039 070 33322200332
DLN BB 047/079 048/079 046 08411
BBUBB 078/047 079/044 080/046 078/046 077 33222211332
HVR BB 055/081 054/082 053 08712
BBUBB 082/051 079/053 086/055 084/055 080 33330000332
LWT BB 052/077 051/079 050 08713
BBUBB 080/048 079/046 080/048 078/048 075 33330000332
.TFX...NONE.Hazardous weather outlook, Jun 13, 6:35 AM MDT, 9 hours 46 minutes before
MTZ008>015-044>055-140010- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 635 AM MDT FRI JUN 13 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND SOUTHWEST MONTANA .DAY ONE...TODAY A PACIFIC COLD FRONT WILL MOVE ACROSS NORTH CENTRAL AND SOUTHWEST MONTANA THIS AFTERNOON AND EVENING...WITH SHOWERS AND THUNDERSTORMS DEVELOPING AHEAD OF IT. THESE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE STRONG GUSTY WINDS AND LARGE HAIL. PLEASE MONITOR THE LATEST INFORMATION ISSUED BY THE NATIONAL WEATHER SERVICE IN GREAT FALLS ON THIS DEVELOPING SITUATION. NO WATCHES, WARNINGS, OR ADVISORIES CURRENTLY IN EFFECT .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
Nearby
Severe Thunderstorm Warnings in Montana, 2003Every severe thunderstorm warning in 2003
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.