Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 49, NWS Glasgow, MT

July 5, 2001Dawson County, Wibaux County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 5, 2001, 10:30 PM MDT for Dawson County, Wibaux County, Montana. It was in force for 60 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: Jul 5, 2001, 10:30 PM MDT (04:30 UTC)
Expired: Jul 5, 2001, 11:30 PM MDT
In force: 60 min
Issued by: NWS Glasgow, MT
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Dawson County, MT, Wibaux County, MT

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 5, 8:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.5 hours before the alert went out and 233 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: 2576 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 2345 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KGGW 060430
SVRGGW

MTC021-109-060530-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
1030 PM MDT THU JUL 5 2001

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN DAWSON COUNTY IN NORTHEAST MONTANA
  SOUTHERN WIBAUX COUNTY IN NORTHEAST MONTANA

* UNTIL 1130 PM MDT

* AT 1021 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES WEST OF HODGES...OR ABOUT 13 MILES
  SOUTH OF GLENDIVE...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HODGES BY 1040 PM MDT
  WIBAUX BY 1050 PM MDT

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

LAT...LON 4701 10470 4683 10471 4674 10337 4701 10335

.END
!86!

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 Jul 5, 9:25 PM MDT, 1 hour 5 minutes earlier.

Area forecast discussion, Jul 5, 9:25 PM MDT, 1 hour 5 minutes before

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
925 PM MDT THU JUL 5 2001

SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 07Z FOR EASTERN ZONES.
SEVERE WEATHER IN PROGRESS OVER EASTERN HALF OF CWA. NOT ENOUGH TIME
FOR IN DEPTH FORECAST DISCUSSION.   POHL

EXTENDED...SOUTHWEST CONUS HIGH CONTINUES TO DOMINATE THE WEATHER
PATTERN THROUGH THE EXTENDED PERIOD. HIGH PULLS MONSOONAL MOISTURE
NORTH TOWARD MONTANA BUT MODELS KEEPING NORTHERN MONTANA ON THE
PERIPHERY OF MOISTURE STREAM. JET PULLS FURTHER NORTH INTO CANADA
WITH WEAK SHORTWAVE ENERGY ROTATING AROUND HIGH INTO MONTANA. TIMING
AND STRENGTH OF THESE WAVES STILL AN ISSUE BUT AVN SUGGESTING BEST
POSSIBILITY FOR THUNDERSTORMS DURING THE PERIOD WILL BE SUNDAY WITH
A WEAK FRONT PUSHING ACROSS CWA. REMAINDER OF PERIOD MARGINAL FOR
THUNDERSTORMS BUT WILL KEEP DRY WORDING FOR NOW. EBERT

KGGW 062/082 053/086 057/087 057/087 059/088 060/086 060/086
      BBTBBBB  873111/9032222

KGDV 062/083 052/086 056/087 056/088 058/089 057/085 059/086
      BBTBBBB  875111/9032222

In the hours before

Local storm report, Jul 5, 10:22 PM MDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1022 PM MDT THU JUL 5 2001

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

0840 PM    15 N BROCKTON             MT   60 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0840 PM    17 N BROCKTON             MT   80 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0840 PM    18 W FROID                MT   80 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0850 PM    IN TOWN GLENDIVE          MT   .88 INCH HAIL
07/05/01   DAWSON

0850 PM    10 W FROID                MT   WIND DAMAGE
07/05/01   ROOSEVELT                      TRACTOR/TRAILER BLOWN OVER

0852 PM    11 W FROID                MT   80 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0920 PM    HOMESTEAD                 MT   60 MPH TSTM WIND GUST
07/05/01   SHERIDAN

0921 PM    25 NW (SDY)SIDNEY-RICHLANDMT(GDV)GLENDIVE-DAWSON   TORNADO
07/05/01   RICHLAND

0921 PM    25 NW SIDNEY              MT   TORNADO
07/05/01   RICHLAND

AP

Local storm report, Jul 5, 10:22 PM MDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GLASGOW MT
1022 PM MDT THU JUL 5 2001

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

0840 PM    15 N BROCKTON             MT   60 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0840 PM    17 N BROCKTON             MT   80 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0840 PM    18 W FROID                MT   80 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0850 PM    IN TOWN GLENDIVE          MT   .88 INCH HAIL
07/05/01   DAWSON

0850 PM    10 W FROID                MT   WIND DAMAGE
07/05/01   ROOSEVELT                      TRACTOR/TRAILER BLOWN OVER

0852 PM    11 W FROID                MT   80 MPH TSTM WIND GUST
07/05/01   ROOSEVELT

0920 PM    HOMESTEAD                 MT   60 MPH TSTM WIND GUST
07/05/01   SHERIDAN

0921 PM    25 NW SIDNEY              MT   TORNADO
07/05/01   RICHLAND

AP

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 8:01 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	89 min
Jul 5, 8:17 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	58 min
Jul 5, 8:47 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	88 min
Jul 5, 9:31 PM MDT	Tornado Warning	GGW	Richland	59 min
Jul 5, 9:33 PM MDT	Tornado Warning	GGW	Roosevelt	42 min
Jul 5, 9:54 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	36 min
Jul 5, 10:45 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	60 min

Nearby

Severe Thunderstorm Warnings in Montana, 2001 Every 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.