Alert archive / Montana / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 51, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 19, 2003, 7:24 PM MDT for Blaine County, Montana. It was in force for 51 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 19, 2003, 7:24 PM MDT (01:24 UTC)
- Expired
- Jun 19, 2003, 8:15 PM MDT
- In force
- 51 min
- Issued by
- NWS Great Falls, MT
- Area
- Counties, with a storm outline in the text
County Blaine County, MT
The radar
The Glasgow radar (KGGW), 182 km from the middle of the area, began a volume at 01:26 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 00:00Z, 1.4 hours before the alert went out and 136 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
- 3076 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
100 WUUS55 KTFX 200124 SVRTFX MTC005-200215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREAT FALLS MT 722 PM MDT THU JUN 19 2003 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN BLAINE COUNTY IN NORTH CENTRAL MONTANA * UNTIL 815 PM MDT * AT 719 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS 11 MILES NORTHWEST OF LODGEPOLE...OR ABOUT 40 MILES SOUTHEAST OF CHINOOK. THE STORM WILL DRIFT NORTH OVER THE NEXT HOUR. * THE SEVERE THUNDERSTORM WILL REMAIN OVER RURAL BLAINE COUNTY 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 4791 10947 4801 10852 4841 10845 4841 10947
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 19, 7:05 PM MDT, 19 minutes earlier.
Area forecast discussion, Jun 19, 7:05 PM MDT, 19 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
705 PM MDT THU JUN 19 2003
UPDATING ZONES AND STATE FORECAST TO REMOVE SEVERE THUNDERSTORM
WATCH AND FRESHEN UP SOME OF THE WORDING FOR THE TONIGHT PERIOD.
.DISCUSSION...
TONIGHT THROUGH SATURDAY...SHOWERS AND THUNDERSTORMS WILL CONTINUE
OVER THE AREA INTO THE WEEKEND. LATE FRIDAY NIGHT AN UPPER TROUGH
MOVES INTO MT WEST OF THE CONTINENTAL DIVIDE THEN MOVES THROUGH THE
FORECAST AREA ON SAT. AT THE SURFACE A TROUGH FROM CENTRAL MT
THROUGH SW MT WILL NOT MAKE MUCH PROGRESS E OVERNIGHT BUT THEN WILL
ACCELERATE INTO THE ERN PLAINS OF MT FRI AFTERNOON AS DOWNSLOPE
INCREASES OVER THE E SLOPES OF THE ROCKY MOUNTAINS. ONE AREA OF
CONVECTION WILL SPREAD NE FROM SW MT TO N CENTRAL MT THU AFTERNOON
AND EVENING. A SHORTWAVE MAY SPAWN ANOTHER ROUND OF CONVECTION OVER
THE FAR WRN ZONES LATE TONIGHT WHICH WILL SPREAD E ON FRI. EXPECT
PRECIPITATION TO DIMINISH W TO E FRI AFTERNOON AND EVENING AS
SHORTWAVE MOVES E OF AREA AND DOWNSLOPE INCREASES. ON SAT THERE WILL
BE INSTABILITY AS THE UPPER TROUGH MOVES THROUGH THE AREA. BUT ON
THE OTHER HAND LOW LEVEL DOWNSLOPE WINDS WILL BE BLOWING OVER THE
PLAINS. ETA AND GFS DIFFER ON QPF FOR AREA ON SAT WITH GFS DRIER.
WILL CONTINUE WITH CHANCE POPS N BUT LOWER FAR S TO SLIGHT CHANCE AS
MOST MOISTURE AND DYNAMICS STAY N OF AREA. AS FOR SEVERE
WEATHER..SEVERE TSTM WATCH IS IN PLACE THROUGH THE EARLY EVENING
HOURS OF THU AND MAY NEED TO BE EXPANDED N AND/OR E DURING THE
EVENING. FRI AFTERNOON SURFACE TROUGH AND GREATEST INSTABILITY ARE E
OF FORECAST AREA BUT THERE STILL IS AN OUTSIDE CHANCE OF SEVERE
TSTMS OVER FERGUS AND BLAINE COUNTIES. BLANK
.SATURDAY NIGHT AND SUNDAY...UPPER TROF MOVES OVER THE AREA SATURDAY
NIGHT CONTINUING CONVECTIVE ACTIVITY. BY SUNDAY...FLOW ALOFT BECOMES
MORE WESTERLY ALLOWING FOR SOMEWHAT OF A RESPITE FROM SIGNIFICANT
WEATHER. ENOUGH INSTABILITY THOUGH FOR A SLIGHT CHANCE OF SHOWERS OR
THUNDERSTORMS.
.MONDAY THROUGH THURSDAY...CONVECTIVE PATTERN RETURNS MONDAY
THROUGH WEDNESDAY AS AN UPPER LOW MOVES ACROSS IDAHO AND NORTHERN
WYOMING. LOW LIFTS OUT THURSDAY LEAVING CWA UNDER NORTHWEST FLOW
ALOFT. CHANCE OF SHOWERS WILL CONTINUE EACH DAY.
.CCF NUMBERS
GTF TE 054/070 046/065 043 04664
BBBBB 066/043 065/044 064/047 066/046 070 33233334433
CTB TE 055/064 044/062 041 04761
BBEBB 063/045 061/044 063/045 065/045 068 33233333322
HLN TE 058/071 047/066 046 04665
BBBBB 065/045 066/046 066/050 067/049 072 33233444433
BZN TB 051/072 044/065 040 04566
BBBBB 065/040 064/043 066/046 067/045 069 33233444444
WEY TB 042/066 038/058 031 04467
BBBBB 060/038 059/039 058/039 056/037 062 23233444455
DLN TB 054/067 044/064 038 04666
BBBBB 064/040 064/042 066/047 065/042 071 23233444433
HVR TE 057/077 049/069 045 04664
BBBBB 067/048 069/049 068/050 071/049 074 33233443333
LWT TB 054/075 046/065 042 04566
BBBBB 062/044 061/045 063/047 065/045 068 33233444444
.TFX...NONEHazardous weather outlook, Jun 19, 7:00 PM MDT, 24 minutes before
MTZ008>015-044>055-200010- HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE GREAT FALLS MT 700 PM MDT THU JUN 19 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND SOUTHWEST MONTANA .DAY ONE...TODAY THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW FOR THE REMAINDER OF THE NIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY 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.
In the hours before
Local storm report, Jun 19, 4:50 PM MDT, 2 hours 34 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
450 PM MDT THU JUN 19 2003
TIME(MDT) .....EVENT LOCATION..... ST ...EVENT/REMARKS...........
.....COUNTY LOCATION.....
0420 PM CHOTEAU MT 1 INCH HAIL
06/19/03 TETON
0440 PM CHOTEAU MT 0.75 INCH HAIL
06/19/03 TETON
0445 PM VALIER MT 1 INCH HAIL
06/19/03 PONDERA
NNNNLocal storm report, Jun 19, 6:01 PM MDT, 1 hour 23 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
601 PM MDT THU JUN 19 2003
TIME(MDT) .....EVENT LOCATION..... ST ...EVENT/REMARKS...........
.....COUNTY LOCATION.....
0350 PM 4 W HELENA MT 0.25 INCH HAIL
06/19/03 LEWIS AND CLARK
0420 PM 18 SE AUGUSTA MT 58 MPH TSTM GUST
06/19/03 LEWIS AND CLARK
0420 PM CHOTEAU MT 1 INCH HAIL
06/19/03 TETON
0430 PM 18 SE AUGUSTA MT 61 MPH TSTM GUST
06/19/03 LEWIS AND CLARK SUSTAINED 50 MPH WINDS
0440 PM CHOTEAU MT 0.75 INCH HAIL
06/19/03 TETON
0445 PM VALIER MT 1 INCH HAIL
06/19/03 PONDERA
0450 PM 1 NE SIMMS MT 60 MPH TSTM GUST
06/19/03 CASCADE ESTIMATED WINDS
0458 PM 1 NE SIMMS MT 0.25 INCH HAIL
06/19/03 CASCADE
0500 PM 1 W ULM MT 60 MPH TSTM GUST
06/19/03 CASCADE ESTIMATED WINDS
0505 PM 7 W FAIRFIELD MT 60 MPH TSTM GUST
06/19/03 TETON LIMB (20 FT. IN LENGTH)
DOWN
0521 PM 2 SW GREAT FALLS MT 55 MPH TSTM GUST
06/19/03 CASCADE NWS OFFICE
0535 PM 8 NE BELGRADE MT 50 MPH TSTM GUST
06/19/03 GALLATIN
0540 PM CENTERVILLE MT 61 MPH TSTM GUST
06/19/03 CASCADE 1.20 INCHES
0545 PM 15 NE DUTTON MT 53 MPH TSTM GUST
06/19/03 TETON HEAVY RAIN 0.55 INCHES IN
10 MIN.
NNNNLocal storm report, Jun 19, 6:58 PM MDT, 26 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
658 PM MDT THU JUN 19 2003
TIME(MDT) .....EVENT LOCATION..... ST ...EVENT/REMARKS...........
.....COUNTY LOCATION.....
0350 PM 4 W HELENA MT 0.25 INCH HAIL
06/19/03 LEWIS AND CLARK
0420 PM 18 SE AUGUSTA MT 58 MPH TSTM GUST
06/19/03 LEWIS AND CLARK
0420 PM CHOTEAU MT 1 INCH HAIL
06/19/03 TETON
0430 PM 18 SE AUGUSTA MT 61 MPH TSTM GUST
06/19/03 LEWIS AND CLARK SUSTAINED 50 MPH WINDS
0440 PM CHOTEAU MT 0.75 INCH HAIL
06/19/03 TETON
0445 PM VALIER MT 1 INCH HAIL
06/19/03 PONDERA
0450 PM 1 NE SIMMS MT 60 MPH TSTM GUST
06/19/03 CASCADE ESTIMATED WINDS
0458 PM 1 NE SIMMS MT 0.25 INCH HAIL
06/19/03 CASCADE
0500 PM 1 W ULM MT 60 MPH TSTM GUST
06/19/03 CASCADE ESTIMATED WINDS
0505 PM 7 W FAIRFIELD MT 60 MPH TSTM GUST
06/19/03 TETON LIMB (20 FT. IN LENGTH)
DOWN
0521 PM 2 SW GREAT FALLS MT 55 MPH TSTM GUST
06/19/03 CASCADE NWS OFFICE
0530 PM 12 NE POWER MT 70 MPH TSTM GUST
06/19/03 TETON HEAVY RAIN 0.40 INCHES IN
10 MIN.
0535 PM 8 NE BELGRADE MT 50 MPH TSTM GUST
06/19/03 GALLATIN
0540 PM CENTERVILLE MT 61 MPH TSTM GUST
06/19/03 CASCADE 1.20 INCHES
0545 PM 15 NE DUTTON MT 53 MPH TSTM GUST
06/19/03 TETON HEAVY RAIN 0.55 INCHES IN
10 MIN.
NNNNSpecial weather statement, Jun 19, 7:18 PM MDT, 6 minutes before
MTZ008-012-014-015-048-050>055-200145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 718 PM MDT THU JUN 19 2003 ...SPECIAL WEATHER STATEMENT FOR TONIGHT... SEVERE THUNDERSTORM WATCH 546 THAT WAS IN EFFECT FOR... BEAVERHEAD...MADISON...GALLATIN...BROADWATER...CASCADE...LEWIS AND CLARK...JEFFERSON...MEAGHER...FERGUS...AND JUDITH BASIN COUNTIES...HAS EXPIRED. SHOWERS AND THUNDERSTORMS WITH SMALL HAIL...HEAVY RAIN AND GUSTY WINDS ARE STILL POSSIBLE THROUGHOUT THE REMAINDER OF THE EVENING.
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 11:25 AM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 50 min |
| Jun 20, 12:13 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 47 min |
| Jun 20, 12:36 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 24 min |
| Jun 20, 12:55 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 35 min |
| Jun 20, 1:00 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 30 min |
| Jun 20, 1:30 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Liberty, Pondera, Toole | 45 min |
| Jun 20, 2:14 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty | 46 min |
| Jun 20, 2:25 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 35 min |
| Jun 20, 2:47 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 43 min |
| Jun 20, 3:26 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 64 min |
| Jun 20, 4:00 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 60 min |
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.