Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 21, NWS Glasgow, MT

June 27, 2001Dawson County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 27, 2001, 3:39 AM MDT for Dawson County, Montana. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jun 27, 2001, 3:39 AM MDT (09:39 UTC)
Expired
Jun 27, 2001, 4:45 AM MDT
In force
66 min
Issued by
NWS Glasgow, MT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Dawson County, MT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 9.7 hours before the alert went out and 168 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 00:00Z on 2001-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2001-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1655 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
466 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KGGW 270940
SVRGGW
MTC021-271045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
339 AM MDT WED JUN 27 2001

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAWSON COUNTY IN NORTHEAST MONTANA

* UNTIL 445 AM MDT

* AT 331 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES SOUTH OF LINDSAY...OR ABOUT 15 MILES
  NORTHEAST OF TERRY...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER...
  RURAL SOUTHERN AND CENTRAL DAWSON COUNTY
  

  LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINFALL ARE LIKELY WITH   
  THIS STORM. TAKE COVECR IN A STURDY BUILDING UNTIL THE STORM HAS    
  PASSED.

LAT...LON 4720 10531 4698 10519 4689 10492 4716 10435
          4758 10486

.END
94

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 2:51 PM MDTSevere Thunderstorm WarningGGWPrairie, Wibaux24 min
Jun 27, 3:14 PM MDTSevere Thunderstorm WarningGGWPrairie, Wibaux61 min
Jun 27, 4:15 PM MDTSevere Thunderstorm WarningGGWWibaux60 min
Jun 27, 4:56 PM MDTSevere Thunderstorm WarningGGWDawson64 min
Jun 27, 5:12 PM MDTSevere Thunderstorm WarningGGWWibaux63 min

Nearby

Severe Thunderstorm Warnings in Montana, 2001Every severe thunderstorm warning in 2001

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.