Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 14, NWS Glasgow, MT

June 15, 2001Valley County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 15, 2001, 12:58 PM MDT for Valley County, Montana. It was in force for 62 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 15, 2001, 12:58 PM MDT (18:58 UTC)
Expired: Jun 15, 2001, 2:00 PM MDT
In force: 62 min
Issued by: NWS Glasgow, MT
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Valley County, MT

What was reported inside it

Time	Report	Where	Remark
Jun 15, 1:25 PM MDT	Hail 0.75	Hinsdale, 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

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 7.0 hours before the alert went out and 17 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: 31 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1214 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 57 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 15, 9:35 AM MDT, 3 hours 23 minutes earlier.

Area forecast discussion, Jun 15, 9:35 AM MDT, 3 hours 23 minutes before

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
935 AM MDT FRI JUN 15 2001

THE UPPER LOW HAS LIFTED INTO MANITOBA THIS MORNING. NORTHEAST
MONTANA WILL REMAIN IN CYCLONIC FLOW ALOFT AS A SHORTWAVE TRACKS
THROUGH CENTRAL MONTANA TODAY. ETA FORECAST SOUNDINGS SHOW MODERATE
INSTABILITY BY THIS AFTERNOON WITH LI'S AT -5 AND CAPES TO 1400
J/KG...SO SCATTERED POPS LOOK GOOD. WINDS ARE FORECAST TO INCREASE
TO 20-25 KTS UP TO 700 MB. WE WILL MIX OUT WELL TODAY SO WILL BUMP
UP WINDS. UPDATES ON THE WAY.  WATERHOUSE

EXTENDED...MODERATE ZONAL FLOW ALL PERIOD...WITH TEMPS A LITTLE
BELOW NORMAL. WEAK SHORTWAVE MOVES ACROSS S CAN SUN. EXPECT ISOLATED
TSTORM OR TWO ACROSS N BORDER ZONES...BUT OTHERWISE DRY FORECAST
GOOD. PROGS FAIRLY CONSISTENT...BUT NOW DIFFERENT FROM PREVIOUS RUNS
WITH HANDLING MON SYSTEM...KEEPING GULF OF AK CLOSED 500 MB LOW
TRAPPED UNDER CUT OFF AK HIGH THROUGH PERIOD AND ONLY SENDING
SHORTWAVE THOUGH MT. STILL STRONG ENOUGH FOR CHANCE OF TSTORMS. AVN
WANTS TO GIVE ACCOMPANYING COLD FRONT A BOOST WITH INPUT FROM N
BRANCH OF JET...DROPPING 850 TEMPS TO UPPER 30S 00Z TUE. THIS
DISCOUNTED...BUT WILL COOL MON HIGHS A LITTLE IN LINE WITH
SURROUNDING ZONES...OTHERWISE NOTHING IN NEW MRF TO INDICATE STRONG
NEED FOR CHANGES. SIMONSEN

KGGW /069 045/072 047/076 052/074 050/067 046/073 050/073
      BBBTWBB  87441/8203422
KGDV /069 045/072 047/078 05O1/076 046/071 049/073 050/075
      BBBTWBB  87331/8203422

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 12:48 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	57 min
Jun 15, 2:56 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	64 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.