Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 21, NWS Glasgow, MT

June 22, 2002Petroleum County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 22, 2002, 2:12 PM MDT for Petroleum County, Montana. It was in force for 48 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 22, 2002, 2:12 PM MDT (20:12 UTC)
Expired
Jun 22, 2002, 3:00 PM MDT
In force
48 min
Issued by
NWS Glasgow, MT
Area
Counties, with a storm outline in the text

County Petroleum County, MT

The radar

The Billings radar (KBLX), 130 km from the middle of the area, began a volume at 20:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jun 22, 2:30 PM MDTTornado F0Winnett, MTBrief tornado touch down reported by spotter 15 SE Winnett.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 22, 1:45 PM MDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 8.2 hours before the alert went out and 182 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-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 12:00Z on 2002-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1539 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 12:00Z on 2002-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KGGW 222012
SVRGGW
MTC069-222100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
207 PM MDT SAT JUN 22 2002

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN PETROLEUM COUNTY IN NORTHEAST MONTANA

* UNTIL 300 PM MDT

* AT 205 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 20 MILES EAST OF WINNETT...MOVING WEST AT 15
  MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER...
  RURAL SOUTHERN PETROLEUM COUNTY

A TRAINED WEATHER SPOTTER REPORTED 3/4 INCH HAIL NEAR 4 MILES 
SOUTHWEST OF MOSBY.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL...DANGEROUS 
LIGHTNING AND TORRENTIAL RAINS.

LAT...LON 4679 10839 4679 10797 4701 10795 4726 10799
          4727 10843

.END
77

The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 9:27 PM MDTSevere Thunderstorm WarningGGWGarfield63 min
Jun 21, 10:04 PM MDTSevere Thunderstorm WarningGGWValley56 min
Jun 21, 10:53 PM MDTSevere Thunderstorm WarningGGWMcCone67 min
Jun 22, 12:31 AM MDTSevere Thunderstorm WarningGGWRichland, Roosevelt59 min
Jun 22, 2:01 AM MDTSevere Thunderstorm WarningGGWDawson59 min
Jun 22, 2:08 AM MDTSevere Thunderstorm WarningGGWWibaux67 min
Jun 22, 3:59 AM MDTSevere Thunderstorm WarningGGWRoosevelt61 min
Jun 22, 1:14 PM MDTSevere Thunderstorm WarningGGWGarfield61 min
Jun 22, 2:26 PM MDTSevere Thunderstorm WarningGGWGarfield64 min
Jun 22, 2:29 PM MDTSevere Thunderstorm WarningGGWValley61 min
Jun 22, 2:31 PM MDTSevere Thunderstorm WarningGGWValley59 min
Jun 22, 2:32 PM MDTSevere Thunderstorm WarningGGWValley58 min
Jun 22, 2:42 PM MDTSevere Thunderstorm WarningGGWPhillips63 min
Jun 22, 2:45 PM MDTFlash Flood WarningGGWGarfield3 hr
Jun 22, 3:13 PM MDTSevere Thunderstorm WarningGGWValley62 min
Jun 22, 3:44 PM MDTSevere Thunderstorm WarningGGWPhillips61 min
Jun 22, 5:06 PM MDTSevere Thunderstorm WarningGGWPhillips69 min
Jun 22, 5:47 PM MDTSevere Thunderstorm WarningGGWGarfield, Prairie58 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; radar from the NEXRAD Level II archive.