Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 20, NWS Glasgow, MT

June 22, 2002Garfield County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 22, 2002, 1:14 PM MDT for Garfield County, Montana. It was in force for 61 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, 1:14 PM MDT (19:14 UTC)
Expired: Jun 22, 2002, 2:15 PM MDT
In force: 61 min
Issued by: NWS Glasgow, MT
Area: Counties, with a storm outline in the text

County Garfield County, MT

What was reported inside it

Time	Report	Where	Remark
Jun 22, 2:10 PM MDT	Hail 0.75	Mosby, 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 12:00Z, 7.2 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.

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: 1539 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 22, 9:00 AM MDT, 4 hours 14 minutes earlier.

Area forecast discussion, Jun 22, 9:00 AM MDT, 4 hours 14 minutes before

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In the hours before

Local storm report, Jun 22, 10:46 AM MDT, 2 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1046 AM MDT SAT JUN 22 2002

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 AM    8 NE CULBERTSON           MT   1.00 INCH HAIL
06/22/02   ROOSEVELT

0215 AM    10NE LINDSAY              MT   1.00 INCH HAIL
06/22/02   DAWSON

1230 AM    POPLAR                    MT   .75 INCH HAIL
06/22/02   ROOSEVELT

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, 2:01 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, 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.