Alert archive / Montana / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 31, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jun 30, 2003, 8:56 PM MDT for Garfield County, Montana. It was in force for 64 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 30, 2003, 8:56 PM MDT (02:56 UTC)
- Expired
- Jun 30, 2003, 10:00 PM MDT
- In force
- 64 min
- Issued by
- NWS Glasgow, MT
- Area
- Counties, with a storm outline in the text
County Garfield County, MT
The radar
The Glasgow radar (KGGW), 107 km from the middle of the area, began a volume at 02:59 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 30, 5:35 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 2.9 hours before the alert went out and 479 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
- 1086 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 2554 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 8:45 PM MDT, 11 minutes earlier.
Area forecast discussion, Jun 30, 8:45 PM MDT, 11 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
845 PM MDT MON JUN 30 2003
.SHORT TERM...SEVERE THUNDERSTORM WATCH CONTINUES UNTIL MIDNIGHT.
SEVERE PATTERN SHAPING UP MUCH AS EXPECTED WITH INCREASINGLY
UNSTABLE AIRMASS AND DRY...BUT MOISTENING UP AIRMASS. LIFTED INDEX
-6 AND CAPES 1500 J/KG AT KGGW SUSTAINING SEVERE CONVECTION WITH
SEVERAL WARNINGS ISSUED AND UP TO 70 MPH WINDS OUT OF HIGH BASED
CONVECTION. STORMS MOVING EAST A LITTLE FASTER THAN FORECAST AND
HAVE ADJUSTED GRIDS AND ZONES FOR SUCH. OTHERWISE NO OTHER UPDATES.
SIMONSEN
.LONG TERM...THURSDAY NIGHT THROUGH MONDAY...
A WELCOMED BROAD UPPER TROF WILL DOMINATE THE WEATHER DURING THE
BEGINNING OF THIS PERIOD. THIS WILL BRING A COOL/DRY AIRMASS TO THE
AREA AT ALL LEVELS TO WORK INTO THE AREA THURSDAY NIGHT. THE TROF
BROADENS OVER CANADA DURING MUCH OF THE PERIOD WITH MUCH OF THE
MOISTURE AND INSTABILITY REMAINING TO OUR NORTH. TEMPERATURES LOOK
TO REMAIN BELOW NORMAL FOR MUCH OF THE PERIOD. HAVE NOT MADE TOO
MANY CHANGES TO GOING FORECAST. JAMBA
KGGW BBB 060/086 058/083 054/079 82300020
EEBB 051/079 056/080 056/081 056/081 7600000000
KGDV BBB 062/091 060/087 055/082 82322020
EBBB 053/079 057/084 057/084 057/084 7600000000
.GGW...SEVERE THUNDERSTORM WATCH UNTIL MIDNIGHT ALL ZONES.Hazardous weather outlook, Jun 30, 10:20 AM MDT, 10 hours 36 minutes before
MTZ016>027-059>062-011200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GLASGOW MT 1020 AM MDT MON JUN 30 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MONTANA .DAY ONE... AN APPROACHING COLD FRONT FROM THE WEST WILL ENTER A WARM AND UNSTABLE AIRMASS OVER NORTHEAST MONTANA THIS EVENING AND TONIGHT. MOISTURE WILL BE LIMITED...SO THUNDERSTORMS THAT FORM WILL BE ISOLATED TO SCATTERED...BUT THOSE THAT DO FORM WILL BE VERY STRONG TO SEVERE. DAMAGING WINDS ARE POSSIBLE FROM THESE. THE THREAT OF SEVERE THUNDERSTORM WINDS WILL BEGIN IN WESTERN SECTIONS OF NORTHEAST MONTANA EARLY THIS EVENING...SPREADING TO EASTERN SECTIONS AND THE NORTH DAKOTA BORDER AROUND MIDNIGHT. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. SIMONSEN
In the hours before
Local storm report, Jun 30, 8:11 PM MDT, 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
0811 PM MDT MON JUN 30 2003
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0802 PM 10 E HELL CREEK RECREATIO MT 60 MPH TSTORM WIND
06/30/03 GARFIELD
CBLocal storm report, Jun 30, 8:20 PM MDT, 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
0820 PM MDT MON JUN 30 2003
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0817 PM 43 NE JORDAN MT 70 MPH TSTORM WIND
06/30/03 MCCONE
CBThe office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 6:16 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 59 min |
| Jun 30, 6:37 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 53 min |
| Jun 30, 7:32 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 58 min |
| Jun 30, 7:54 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 66 min |
| Jun 30, 8:20 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 55 min |
| Jun 30, 9:01 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 59 min |
| Jun 30, 9:17 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 58 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.