Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 48, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jul 5, 2001, 9:54 PM MDT for Dawson County, Montana. It was in force for 36 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
- Jul 5, 2001, 9:54 PM MDT (03:54 UTC)
- Expired
- Jul 5, 2001, 10:30 PM MDT
- In force
- 36 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Dawson County, MT
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 5, 8:00 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.9 hours before the alert went out and 166 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
- 2576 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 2345 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Jul 5, 9:25 PM MDT, 29 minutes earlier.
Area forecast discussion, Jul 5, 9:25 PM MDT, 29 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
925 PM MDT THU JUL 5 2001
SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 07Z FOR EASTERN ZONES.
SEVERE WEATHER IN PROGRESS OVER EASTERN HALF OF CWA. NOT ENOUGH TIME
FOR IN DEPTH FORECAST DISCUSSION. POHL
EXTENDED...SOUTHWEST CONUS HIGH CONTINUES TO DOMINATE THE WEATHER
PATTERN THROUGH THE EXTENDED PERIOD. HIGH PULLS MONSOONAL MOISTURE
NORTH TOWARD MONTANA BUT MODELS KEEPING NORTHERN MONTANA ON THE
PERIPHERY OF MOISTURE STREAM. JET PULLS FURTHER NORTH INTO CANADA
WITH WEAK SHORTWAVE ENERGY ROTATING AROUND HIGH INTO MONTANA. TIMING
AND STRENGTH OF THESE WAVES STILL AN ISSUE BUT AVN SUGGESTING BEST
POSSIBILITY FOR THUNDERSTORMS DURING THE PERIOD WILL BE SUNDAY WITH
A WEAK FRONT PUSHING ACROSS CWA. REMAINDER OF PERIOD MARGINAL FOR
THUNDERSTORMS BUT WILL KEEP DRY WORDING FOR NOW. EBERT
KGGW 062/082 053/086 057/087 057/087 059/088 060/086 060/086
BBTBBBB 873111/9032222
KGDV 062/083 052/086 056/087 056/088 058/089 057/085 059/086
BBTBBBB 875111/9032222The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 8:01 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 89 min |
| Jul 5, 8:17 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 58 min |
| Jul 5, 8:47 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 88 min |
| Jul 5, 9:31 PM MDT | Tornado Warning | GGW | Richland | 59 min |
| Jul 5, 9:33 PM MDT | Tornado Warning | GGW | Roosevelt | 42 min |
| Jul 5, 10:30 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 60 min |
| Jul 5, 10:45 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 60 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2001Every severe thunderstorm warning in 2001
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.