Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 7, NWS Glasgow, MT

June 9, 2001Sheridan County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 9, 2001, 1:53 PM MDT for Sheridan County, Montana. It was in force for 37 min. 2 reports 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 9, 2001, 1:53 PM MDT (19:53 UTC)
Expired: Jun 9, 2001, 2:30 PM MDT
In force: 37 min
Issued by: NWS Glasgow, MT
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Sheridan County, MT

What was reported inside it

Time	Report	Where	Remark
Jun 9, 2:10 PM MDT	Hail 0.88	Comertown, MT
Jun 9, 2:20 PM MDT	Hail 0.75	Westby, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 9, 11:45 AM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 7.9 hours before the alert went out and 164 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: 37 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1810 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 145 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 9, 9:35 AM MDT, 4 hours 18 minutes earlier.

Area forecast discussion, Jun 9, 9:35 AM MDT, 4 hours 18 minutes before

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
935 AM MDT SAT JUN 9 2001

THUNDERSTORMS TRACKING ALONG FORT PECK LAKE THIS MORNING ASSOCIATED
WITH SURFACE BOUNDARY. STORMS INTERACTING WITH OUTFLOW BOUNDARY LEFT
FROM STORMS OVER SOUTHEAST MONTANA OVERNIGHT. THREAT FOR
THUNDERSTORMS WILL CONTINUE THROUGH THE DAY AS JET PUSHES INTO
STATE. CURRENT FORECAST LOOKS OKAY...NO UPDATE PLANNED. EBERT

EXTENDED...NO CHANGE. A WET PATTERN EARLY...THEN RIDGING AND DRYING.
PROTON

KGGW /084 056/082 056/082 051/066 049/070 051/072 050/074
      TTTTBBB  94433/9433111
KGDV /086 055/084 056/086 048/070 050/071 051/074 051/074
      TTTTBBB  94443/9433111

In the hours before

Local storm report, Jun 9, 1:35 PM MDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
135 PM MDT SAT JUN 9 2001

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

1000 AM    12 ENE JORDAN             MT   .88 INCH HAIL
06/09/01   GARFIELD

1005 AM    43 ENE JORDAN             MT   60 MPH TSTM WIND GUST
06/09/01   GARFIELD

1120 AM    20 SE CIRCLE              MT   .75 INCH HAIL
06/09/01   MCCONE

1120 AM    10 SE CIRCLE              MT   .75 INCH HAIL
06/09/01   MCCONE

1144 AM    35 S MALTA                MT   .75 INCH HAIL
06/09/01   PHILLIPS

1130 AM    LINDSAY                   MT   .75 INCH HAIL
06/09/01   DAWSON

1250 PM    48 SW GLASGOW             MT   .75 INCH HAIL
06/09/01   VALLEY

TLSJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 9:12 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	63 min
Jun 9, 10:27 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	63 min
Jun 9, 10:28 AM MDT	Severe Thunderstorm Warning	GGW	Phillips	62 min
Jun 9, 11:24 AM MDT	Severe Thunderstorm Warning	GGW	Dawson	66 min
Jun 9, 11:29 AM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	61 min
Jun 9, 12:28 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Valley	62 min
Jun 9, 2:39 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	36 min
Jun 9, 3:40 PM MDT	Severe Thunderstorm Warning	GGW	Richland	35 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.