Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 39, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jun 29, 2002, 4:43 PM MDT for Prairie County, Montana. It was in force for 62 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 29, 2002, 4:43 PM MDT (22:43 UTC)
- Expired
- Jun 29, 2002, 5:45 PM MDT
- In force
- 62 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties
County Prairie County, MT
The radar
The Glasgow radar (KGGW), 176 km from the middle of the area, began a volume at 22:46 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 29, 4:50 PM MDT | Thunderstorm Wind 52 M | Terry, MT | 60 mph wind reported at Big Sheep RAWS. |
| Jun 29, 5:15 PM MDT | Thunderstorm Wind 52 M | Terry, MT | 60 mph wind toppled 12 inch diameter pine tree at Terry. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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 29, 2:00 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.7 hours before the alert went out and 177 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
- 80 J/kg
- Mixed-layer CIN
- -468 J/kg
- Mixed-layer LCL
- 2641 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KGGW 292243 SVRGGW MTC079-292345- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GLASGOW MT 443 PM MDT SAT JUN 29 2002 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PRAIRIE COUNTY IN NORTHEAST MONTANA * UNTIL 545 PM MDT * AT 441 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 20 MILES NORTH OF MCCLOUD TO 15 MILES WEST OF MCCLOUD...OR FROM 19 MILES SOUTH OF CIRCLE TO 28 MILES WEST OF TERRY...MOVING EAST AT 20 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... MCCLOUD BY 515 PM MDT STRONG AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES. .END 79
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 29, 2:33 PM MDT, 2 hours 10 minutes earlier.
Area forecast discussion, Jun 29, 2:33 PM MDT, 2 hours 10 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
230 PM MDT SAT JUN 29 2002
.SHORT TERM...A 120 KT JET PUNCHING INTO WESTERN MONTANA THIS
AFTERNOON WILL DRIVE A COLD FRONT INTO EASTERN MONTANA THIS EVENING.
AIR MASS AHEAD OF THIS FEATURE IS MODERATELY UNSTABLE. STRONG/SEVERE
THUNDERSTORMS OVER CENTRAL MONTANA WILL SPREAD EAST AHEAD OF THE
FRONT THIS AFTERNOON/TONIGHT. MAIN THREAT SHOULD BE DAMAGING WINDS
AHEAD OF THE FRONT WITH ISOLATED AREAS OF LARGE HAIL ALSO POSSIBLE.
THE AIR MASS DRIES OUT QUICKLY BEHIND THE FRONT TONIGHT WITH DRY AND
COOLER CONDITIONS IN STORE FOR SUNDAY. THE ETA BRINGS ANOTHER WAVE
ALONG THE CANADIAN BORDER SUNDAY NIGHT WITH WEAK LOW PRESSURE
DEVELOPING OVER SOUTHEAST MONTANA. WILL ADD 20 POPS TO COVER
THIS...OTHERWISE DRY CONDITIONS WILL PREVAIL THROUGH TUESDAY.
.LONG TERM...AN UPPER LEVEL RIDGE MOVES OVER THE AREA WEDNESDAY TO
CONTINUE DRY CONDITIONS. SOUTHWEST FLOW RETURNS THE FOURTH OF JULY
FOR CHANCE POPS DAYS 5-7. TEMPERATURES WILL WARM WEDNESDAY AND THE
FOURTH...THEN COOL OFF FRIDAY AND SATURDAY AS A COLD FRONT MOVES
THROUGH THE AREA LATE THURSDAY. WATERHOUSE
KGGW BBB 058/082 055/080 053/080 99612000
BTTT 056/083 059/086 060/081 054/081 9912333333
KGDV BBB 061/085 057/083 054/083 99612000
BTTT 057/085 060/087 060/083 054/083 9912333333
.GGW...NONEIn the hours before
Local storm report, Jun 29, 3:13 PM MDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
313 PM MDT SAT JUN 29 2002
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1140 PM 15 S CONTENT MT 60 MPH TSTM WIND GUST
06/28/02 PHILLIPS
1140 PM 15 S CONTENT MT WIND DAMAGE
06/28/02 PHILLIPS ROOF BLOWN OFF BARNThe office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 11:13 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 62 min |
| Jun 28, 11:54 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 51 min |
| Jun 29, 3:13 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 62 min |
| Jun 29, 3:50 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 55 min |
| Jun 29, 4:04 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 41 min |
| Jun 29, 4:07 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 53 min |
| Jun 29, 4:15 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 60 min |
| Jun 29, 4:49 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 56 min |
| Jun 29, 4:53 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 67 min |
| Jun 29, 5:02 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 58 min |
| Jun 29, 5:54 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 66 min |
| Jun 29, 5:56 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Wibaux | 64 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.