Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 17, NWS Glasgow, MT

June 22, 2002Dawson County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 22, 2002, 2:01 AM MDT for Dawson 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, 2:01 AM MDT (08:01 UTC)
Expired: Jun 22, 2002, 3:00 AM MDT
In force: 59 min
Issued by: NWS Glasgow, MT
Area: Whole counties

County Dawson County, MT

What was reported inside it

Time	Report	Where	Remark
Jun 22, 2:15 AM MDT	Hail 1	Lindsay, 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, 8.0 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

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, 5 hours 22 minutes earlier.

Area forecast discussion, Jun 21, 8:39 PM MDT, 5 hours 22 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, 5 hours 1 minute 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.

Local storm report, Jun 22, 1:49 AM MDT, 12 minutes before

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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, 12:31 AM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	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, 2002 Every 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.