Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 13, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jun 21, 2002, 9:27 PM MDT for Garfield County, Montana. It was in force for 63 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 21, 2002, 9:27 PM MDT (03:27 UTC)
- Expired
- Jun 21, 2002, 10:30 PM MDT
- In force
- 63 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties
County Garfield County, MT
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.5 hours before the alert went out and 109 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
- 1320 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 1902 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KGGW 220327 SVRGGW MTC033-220430- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GLASGOW MT 926 PM MDT FRI JUN 21 2002 THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEAST GARFIELD COUNTY IN NORTHEAST MONTANA * UNTIL 1030 PM MDT * AT 921 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTHWEST OF HELL CREEK RECREATION AREA...OR ABOUT 17 MILES NORTH OF JORDAN...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL REMAIN OVER... RURAL NORTHEASTERN GARFIELD COUNTY LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINFALL ARE LIKELY WITH THIS STORM. TAKE COVER IN A STURDY BUILDING UNTIL THE STORM HAS PASSED. .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 21, 8:39 PM MDT, 48 minutes earlier.
Area forecast discussion, Jun 21, 8:39 PM MDT, 48 minutes before
NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
840 PM MDT FRI JUN 21 2002
.SHORT TERM...WATCH EXPIRES AT 9 PM. ONLY ISOLATED THUNDERSTORMS SO
FAR IN NE MT...NONE SEVERE. KGGW SOUNDING MOIST AND UNSTABLE WITH LI
-7 AND CAPE 2200...AND CONDITIONS MOST UNSTABLE OVER OUR SOUTHERN
ZONES...BUT NO GOOD TRIGGER. ALL MODELS INDICATE BETTER DYNAMICS YET
TO ARRIVE LATER THIS EVENING. NEW MESOETA SHOWS THIS TOO. LOTS OF
ACTIVITY YET UPSTREAM...SO EXPECT AN INCREASE IN THUNDERSTORM
ACTIVITY YET TO COME TONIGHT...ISOLATED SEVERE STILL POSSIBLE.
DEWPOINTS MOSTLY 60 TO 65 ACROSS AREA...WITH AN APPARENT DRY LINE
BETWEEN HAVRE AND MALTA EXTENDING NORTH INTO SOUTHWEST SASKATCHEWAN.
ZONES UPDATED FOR WATCH EXPIRATION ONLY. SIMONSEN
.LONG TERM...STRONG UPPER LEVEL RIDGE OF HIGH PRESSURE BEGINS TO
DEVELOP ACROSS THE REGION ON TUESDAY. RIDGE WILL DOMINATE THE
WEATHER THROUGH THE EXTENDED PERIOD. MOS GUIDANCE APPEARS TO BE A
BIT GENEROUS WITH POPS. WILL CONTINUE WARM AND DRY FORECAST. POHL
KGGW TTT 057/084 058/076 056/083 87456633
BUUU 056/087 057/089 056/090 056/090 8722000000
KGDV TTT 057/084 058/076 056/083 87656633
BUUU 054/085 056/088 055/091 055/091 8722000000
.GGW...NONE.In the hours before
Special weather statement, Jun 21, 9:00 PM MDT, 27 minutes before
MTZ016>027-059>062-220400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GLASGOW MT 900 PM MDT FRI JUN 21 2002 ...SEVERE THUNDERSTORM WATCH FOR NORTHEAST MONTANA ALLOWED TO EXPIRE... SCATTERED STRONG THUNDERSTORMS ARE EXPECTED THE REMAINDER OF TONIGHT...BUT ANY SEVERE ACTIVITY WILL BE VERY ISOLATED. KEEP LISTENING TO NOAA WEATHER RADIO FOR THE LATEST FORECAST FROM THE NATIONAL WEATHER SERVICE.
The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 10:04 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 56 min |
| Jun 21, 10:53 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 67 min |
| Jun 22, 12:31 AM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 59 min |
| Jun 22, 2:01 AM MDT | Severe Thunderstorm Warning | GGW | Dawson | 59 min |
| Jun 22, 2:08 AM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 67 min |
| Jun 22, 3:59 AM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 61 min |
| Jun 22, 1:14 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Jun 22, 2:12 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 48 min |
| Jun 22, 2:26 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 64 min |
| Jun 22, 2:29 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 61 min |
| Jun 22, 2:31 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 59 min |
| Jun 22, 2:32 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 58 min |
| Jun 22, 2:42 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 63 min |
| Jun 22, 2:45 PM MDT | Flash Flood Warning | GGW | Garfield | 3 hr |
| Jun 22, 3:13 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 62 min |
| Jun 22, 3:44 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 61 min |
| Jun 22, 5:06 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 69 min |
| Jun 22, 5:47 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Prairie | 58 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; the sounding from the Mesonet's radiosonde archive.