Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 28, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jun 29, 2001, 2:20 AM MDT for Dawson County, Montana. It was in force for 55 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
- Jun 29, 2001, 2:20 AM MDT (08:20 UTC)
- Expired
- Jun 29, 2001, 3:15 AM MDT
- In force
- 55 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Dawson County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 29, 2:55 AM MDT | Hail 0.75 | Glendive, MT |
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
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 8.3 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
- 148 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 2160 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Jun 28, 8:20 PM MDT, 6 hours earlier.
Area forecast discussion, Jun 28, 8:20 PM MDT, 6 hours before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
820 PM MDT THU JUN 28 2001
SEVERE THUNDERSTORMS DEVELOPING JUST NORTH OF THETA-E RIDGE AXIS
ACROSS SOUTHERN MONTANA. STORMS TRACKING EAST BETWEEN RIDGE AXIS AND
QUASI-DRY LINE STRETCHING FROM LEWISTOWN TO WOLF POINT WITH SEVERE
STORMS STAYING SOUTH OF CWA ATTM. THETA-E RIDGE DOES CURVE NORTHWARD
ACROSS WESTERN MONTANA CLIPPING SOUTHEAST ZONES SO CHANCE OF SEVERE
WX STILL IN THAT AREA. CURRENT FORECAST AS GOOD HANDLE ON SITUATION
ATTM SO NO UPDATE PLANNED. EBERT
EXTENDED...BASIC AGREEMENT AMONG FCST MODELS WITH SUBTLE DIFFERENCES
...TYPICAL OF SUMMER PATTERN. MODELS AGREE BUILDING W CONUS UPPER HI
VICINITY OF FOUR CORNERS WITH RIDGING NORTH THRU MT AND S CANADA.
12Z AVN SHOWS MORE PRONOUNCED RIDGING ACROSS MT/S CANADA THAN 00Z
MRF AND CANADIAN WHICH SHOW TRANSITION TO ZONAL THEN SLIGHT NW FLOW
ACROSS MT BEGINNING SUNDAY AS RIDGE RETROGRADES TO GT BASIN/PAC NW
AXIS. MRF/CANADIAN SOLUTION MORE TYPICAL SUMMER PATTERN FOR REGION
WITH MINOR RIPPLES IN FLOW POTENTIAL TRIGGERS FOR AFTERNOON/EVENING
CONVECTION. PATTERN LOOKS MAINLY DRY AFTER SUNDAY WHEN ANTICIPATE
COOL FRONT PASSAGE. THICKNESS PATTERN SHOWS SLIGHT COOLING FROM
SUNDAY THRU END OF EXTENDED PERIOD. GIVEN THICKNESS PATTERN...WILL
GO ABOVE MOS GUIDANCE SUNDAY BUT ACCEPT GUIDANCE LATER IN PERIOD.
SECORA
KGGW 058/081 057/080 058/085 051/080 054/082 057/081 056/080
BETBUUU 951122/8642111
KGDV 061/082 059/081 057/087 051/083 052/081 055/083 056/083
BETBUUU 954333/8642111The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 2:00 AM 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.