Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 16, NWS Glasgow, MT

June 17, 2001McCone County, Roosevelt County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 17, 2001, 3:04 PM MDT for McCone County, Roosevelt County, Montana. It was in force for 56 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 17, 2001, 3:04 PM MDT (21:04 UTC)
Expired: Jun 17, 2001, 4:00 PM MDT
In force: 56 min
Issued by: NWS Glasgow, MT
Area: Whole counties

Counties McCone County, MT, Roosevelt County, MT

The radar

The Glasgow radar (KGGW), 94 km from the middle of the area, began a volume at 21:06 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

Time	Report	Where	Remark
Jun 17, 3:10 PM MDT	Thunderstorm Wind 52 E	Wolf Pt, 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.1 hours before the alert went out and 379 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1350 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 17, 2:40 PM MDT, 24 minutes earlier.

Area forecast discussion, Jun 17, 2:40 PM MDT, 24 minutes before

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
240 PM MDT SUN JUN 17 2001

BEST CHANCE OF STRONG THUNDERSTORM DEVELOPMENT TONIGHT WILL BE IN
THE SOUTHEAST ZONES. DEW POINTS IN THE LOWER 50S HAVE RESULTED IN
CAPES OF 1500-2000 J/KG. A SURFACE TROUGH SLOWLY MOVING EAST THROUGH
THAT AREA SHOULD INITIATE CONVECTION LATER THIS AFTERNOON. MID LEVEL
WINDS TO 55 KTS WILL PROVIDE GOOD SHEAR WITH FORECASTED HODOGRAPHS
SUGGESTING POSSIBLE SUPERCELL DEVELOPMENT. WILL CONTINUE THE MENTION
OF SEVERE STORMS IN THAT AREA TONIGHT.

WATER VAPOR SHOWS A COMPLEX PATTERN OVER REGION THIS AFTERNOON. FAST
WESTERLY FLOW ALOFT CONTINUES WITH A WAVE MOVING THROUGH SOUTHERN
ALBERTA AND A TROUGH MOVING INTO THE PACIFIC NORTHWEST. ETA/AVN DID
A POOR JOB WITH THE STRENGTH OF THE PACIFIC TROUGH. AVN POINTS AT A
POSSIBLE MCS DEVELOPMENT OVER SOUTHWEST MONTANA LATE TONIGHT WHICH
MOVES INTO SOUTHEAST MONTANA BY 12Z. WILL KEEP POPS OUT FOR THE
ENTIRE AREA OVERNIGHT WITH HIGHER POPS IN THE SOUTHERN ZONES.

TOMORROW WILL BE COOLER WITH COLD AIR ADVECTION. CONVECTIVE
TEMPERATURES WILL BE REACHED BY AFTERNOON FOR MOSTLY CLOUDY SKIES
AND SHOWERY PRECIPITATION. CONVECTION WILL DIMINISH MONDAY EVENING
WITH LOSS OF DYNAMICS AND DIURNAL HEATING. FLOW ALOFT BECOMES
NORTHWEST TUESDAY FOR DRY CONDITIONS AND WARMER TEMPERATURES.
WATERHOUSE

EXTENDED...UPPER LEVEL RIDGE STARTS BUILDING INTO MT ON WED WITH
RIDGE AXIS PROGGED OVER ERN MT ON FRI. WED AND THU WILL BE DRY WITH
A WARMING TREND. FLOW ALOFT BECOME SW FOR NEXT WEEKEND. MRF MOVES A
COLD FRONT THRU ERN MT FRIDAY NIGHT AND SAT MORNING. WILL KEEP
FRIDAY DRY AND WARM AND MENTION A CHANCE OF THUNDERSTORMS FOR SAT.
THEN A SHORTWAVE ON SW FLOW ALOFT FOLLOWS LATE SAT AND EARLY SUN.
WILL ALSO MENTION A CHANCE OF THUNDERSTORMS ON SUN.    FORRESTER

KGGW 048/065 043/072 045/073 049/078 053/085 054/082 054/079         2
      TBBUBTW  994320/7910033
KGDV 050/065 042/070 047/071 050/080 053/086 054/082 055/084
      TBBUBTW  995420/7910133

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 4:21 PM MDT	Severe Thunderstorm Warning	GGW	Richland	69 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; radar from the NEXRAD Level II archive.