Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 16, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jun 22, 2002, 12:31 AM MDT for Richland County, Roosevelt County, Montana. It was in force for 59 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 22, 2002, 12:31 AM MDT (06:31 UTC)
- Expired
- Jun 22, 2002, 1:30 AM MDT
- In force
- 59 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties
Counties Richland County, MT, Roosevelt County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 22, 12:31 AM MDT | Hail 0.75 | Poplar, 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, 6.5 hours before the alert went out and 136 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
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, 3 hours 52 minutes earlier.
Area forecast discussion, Jun 21, 8:39 PM MDT, 3 hours 52 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, 3 hours 31 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, 9:27 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| 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, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.