Alert archive / Montana / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 92, NWS Glasgow, MT

July 6, 2016Dawson County, Prairie County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 6, 2016, 2:22 PM MDT for Dawson County, Prairie County, Montana. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 6, 2016, 2:22 PM MDT (20:22 UTC)
Expired
Jul 6, 2016, 3:15 PM MDT
In force
53 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Dawson County, MT, Prairie County, MT

The radar

The Glasgow radar (KGGW), 169 km from the middle of the area, began a volume at 20:24 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 6, 12:55 PM MDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.4 hours before the alert went out and 339 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, Bismarck Municip, ND at 12:00Z on 2016-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 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, Bismarck Municip, ND at 12:00Z on 2016-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
10 J/kg
Mixed-layer CIN
-272 J/kg
Mixed-layer LCL
1523 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
-21 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

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 6, 2:12 PM MDT, 10 minutes earlier.

Area forecast discussion, Jul 6, 2:12 PM MDT, 10 minutes before
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Hazardous weather outlook, Jul 6, 3:27 AM MDT, 10 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
327 AM MDT WED JUL 6 2016

MTZ016>027-059>062-070930-
CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-
DANIELS-SHERIDAN-WESTERN ROOSEVELT-PETROLEUM-GARFIELD-MCCONE-
RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN PHILLIPS-
SOUTHWEST PHILLIPS-NORTHERN VALLEY-EASTERN ROOSEVELT-
327 AM MDT WED JUL 6 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER TODAY AND
TONIGHT IS LOW.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A LARGE STORM SYSTEM AND COLD FRONT IS EXPECTED TO IMPACT
NORTHEAST MONTANA OVER THE WEEKEND. SEVERE STORMS ARE POSSIBLE
ON SUNDAY ALONG WITH HEAVY RAINFALL. ESTIMATED RAINFALL TOTALS
ARE UNCERTAIN AS WEATHER MODELS CONTINUE TO EVOLVE.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, Jul 6, 12:15 PM MDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
1215 PM MDT WED JUL 6 2016

MTZ023-025-026-061900-
PRAIRIE MT-DAWSON MT-MCCONE MT-
1215 PM MDT WED JUL 6 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MCCONE...
NORTHWESTERN PRAIRIE AND WEST CENTRAL DAWSON COUNTIES UNTIL 100 PM
MDT...

AT 1214 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 16
MILES SOUTH OF BROCKWAY...OR 27 MILES SOUTHWEST OF CIRCLE...MOVING
NORTHEAST AT 20 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
BROCKWAY...MCCLOUD...CROW ROCK AND WATKINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO
STATIONS AND AVAILABLE TELEVISION STATIONS FOR ADDITIONAL INFORMATION
AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4686 10584 4686 10608 4718 10608 4739 10591
      4722 10519 4683 10567 4683 10583
TIME...MOT...LOC 1814Z 230DEG 20KT 4706 10584

BIGELBACH
Local storm report, Jul 6, 12:39 PM MDT, 1 hour 43 minutes before
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Local storm report, Jul 6, 1:22 PM MDT, 1 hour before
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Local storm report, Jul 6, 1:40 PM MDT, 42 minutes before
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Local storm report, Jul 6, 2:00 PM MDT, 22 minutes before
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Special weather statement, Jul 6, 2:01 PM MDT, 21 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 11:07 AM MDTSevere Thunderstorm WarningGGWGarfield53 min
Jul 6, 11:40 AM MDTSevere Thunderstorm WarningGGWGarfield65 min
Jul 6, 12:15 PM MDTSpecial Weather StatementGGWPrairie45 min
Jul 6, 12:41 PM MDTSevere Thunderstorm WarningGGWDawson, Garfield, McCone, Prairie64 min
Jul 6, 1:13 PM MDTSevere Thunderstorm WarningGGWDawson62 min
Jul 6, 1:43 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Prairie62 min
Jul 6, 2:01 PM MDTSpecial Weather StatementGGWPrairie44 min
Jul 6, 2:04 PM MDTSevere Thunderstorm WarningGGWDawson, Wibaux56 min
Jul 6, 2:21 PM MDTAreal Flood WarningGGWDawson3 hr
Jul 6, 2:48 PM MDTSpecial Weather StatementGGWWibaux57 min
Jul 6, 3:11 PM MDTSevere Thunderstorm WarningGGWDawson, Prairie, Wibaux49 min

Nearby

Severe Thunderstorm Warnings in Montana, 2016Every severe thunderstorm warning in 2016

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; radar from the NEXRAD Level II archive.