Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 145, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Sep 4, 2002, 11:53 PM MDT for Phillips County, Valley County, Montana. It was in force for 67 min. 1 report 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
- Sep 4, 2002, 11:53 PM MDT (05:53 UTC)
- Expired
- Sep 5, 2002, 1:00 AM MDT
- In force
- 67 min
- Issued by
- NWS Glasgow, MT
- Area
- Counties, with a storm outline in the text
Counties Phillips County, MT, Valley County, MT
The radar
The Glasgow radar (KGGW), 51 km from the middle of the area, began a volume at 05:55 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 |
|---|---|---|---|
| Sep 5, 1:00 AM MDT | Thunderstorm Wind 52 M | Hinsdale, MT | 60 mph wind reported by spotter 15 miles northwest of Hinsdale. |
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 nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 5.9 hours before the alert went out and 264 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
- 359 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 2121 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -64 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 Sep 4, 8:15 PM MDT, 3 hours 38 minutes earlier.
Area forecast discussion, Sep 4, 8:15 PM MDT, 3 hours 38 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
815 PM MDT WED SEP 4 2002
.SHORT TERM...ISOLATED THUNDERSTORM OVER THE MISSOURI RIVER ON
GARFIELD AND PHILLIPS COUNTY LINE AT THIS TIME. THIS STORM APPEARS
TO BE AT THE NORTHERN END OF A SHORTWAVE OVER SOUTH CENTRAL MONTANA
THAT IS BRINGING CONVECTIVE ACTIVITY TO SE MONTANA. THIS WAVE IS
MOVING ALONG A FRONTAL BOUNDARY LOCATED OVER SOUTHERN MONTANA. LOOK
FOR THIS WAVE TO MOVE ACROSS ERN MONTANA OVERNIGHT AND COULD
EVENTUALLY BRING SOME STORMS TO SE PART OF FORECAST AREA. WITH
ANOTHER AREA OF STORMS OVER NW FERGUS COUNTY AND SW FLOW ALOFT
OVERRUNNING THE FRONTAL BOUNDARY...WILL MAINTAIN GOING FORECAST
WHICH HAS A CHANCE OF SHOWERS AND THUNDERSTORMS FOR THE ENTIRE AREA.
NO UPDATES PLANNED. FORRESTER
.LONG TERM...AVN EXTENDED CONTINUES SOUTHWEST FLOW OVER THE REGION
AS THE WEST COAST TROUGH MOVES NEAR SHORE. PRECIP CONVEYOR CUTS OFF
THE TROPICAL CONNECTION BUT CONTINUED AFTERNOON SHOWERS REMAIN
POSSIBLE. SHOWER POTENTIAL STARTS TO DECREASE ABOUT DAY 6 AND 7 BUT
IS TOO INDEFINITE TO MAKE CHANGES TO THE PRESENT CHANCE POPS.
EXPECT SEASONAL TEMPERATURES. MCNULTY
KGGW BEB 062/085 054/078 054/074 79333443
BBBB 053/076 051/073 052/075 053/063 8133333333
KGDV BBB 063/099 057/087 057/085 79223333
BEBU 056/082 054/080 053/077 053/064 8144333333
.GGW...NONE.The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 10:33 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 57 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.