Alert archive / Montana / Special Weather Statements in 2012

Special Weather Statement, NWS Glasgow, MT

August 2, 2012Daniels County, Montana

NWS Glasgow, MT issued this special weather statement at Aug 2, 2012, 3:57 PM MDT for Daniels County, Montana. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 2, 2012, 3:57 PM MDT (21:57 UTC)
Expired
Aug 2, 2012, 5:00 PM MDT
In force
63 min
Issued by
NWS Glasgow, MT

County Daniels County, MT

The radar

The Glasgow radar (KGGW), 89 km from the middle of the area, began a volume at 21:59 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 nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.0 hours before the alert went out and 87 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, Glasgow Intl Airport, MT at 12:00Z on 2012-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 227 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, Glasgow Intl Airport, MT at 12:00Z on 2012-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 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
227 J/kg
Mixed-layer CIN
-196 J/kg
Mixed-layer LCL
1541 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 2, 3:28 PM MDT, 29 minutes earlier.

Area forecast discussion, Aug 2, 3:28 PM MDT, 29 minutes before
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Hazardous weather outlook, Aug 2, 3:51 PM MDT, 6 minutes before
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In the hours before

Special weather statement, Aug 2, 12:47 PM MDT, 3 hours 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
1247 PM MDT THU AUG 2 2012

MTZ022-023-021945-
GARFIELD-MCCONE-
1247 PM MDT THU AUG 2 2012

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHWESTERN MCCONE COUNTY IN NORTHEAST MONTANA...
  EASTERN GARFIELD COUNTY IN NORTHEAST MONTANA...

UNTIL 145 PM MDT.

AT 1243 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 16 MILES WEST OF
FLOWING WELLS REST AREA TO 8 MILES SOUTHEAST OF JORDAN...AND MOVING
EAST AT 10 MPH.

HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THESE STORMS.

LOCATIONS IN THE ADVISORY INCLUDE...
   VAN NORMAN...

LAT...LON 4746 10596 4726 10644 4720 10691 4736 10652
TIME...MOT...LOC 1846Z 253DEG 10KT 4733 10650 4724 10678

TFJ
WEATHER.GOV/GLASGOW
Special weather statement, Aug 2, 1:41 PM MDT, 2 hours 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
141 PM MDT THU AUG 2 2012

MTZ023-025-026-022045-
DAWSON-MCCONE-PRAIRIE-
141 PM MDT THU AUG 2 2012

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHERN PRAIRIE COUNTY IN NORTHEAST MONTANA...
  SOUTHERN MCCONE COUNTY IN NORTHEAST MONTANA...
  WESTERN DAWSON COUNTY IN NORTHEAST MONTANA...

UNTIL 245 PM MDT.

AT 138 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES SOUTHEAST
OF CIRCLE TO 9 MILES SOUTH OF BROCKWAY...AND MOVING EAST AT 20 MPH.

HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THESE STORMS.

LOCATIONS IN THE ADVISORY INCLUDE...
   LINDSAY...

LAT...LON 4738 10476 4717 10525 4712 10597 4733 10548
TIME...MOT...LOC 1942Z 263DEG 16KT 4729 10546 4718 10572

TFJ
WEATHER.GOV/GLASGOW
Special weather statement, Aug 2, 3:03 PM MDT, 54 minutes before
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Special weather statement, Aug 2, 3:23 PM MDT, 34 minutes before
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Local storm report, Aug 2, 3:26 PM MDT, 31 minutes before
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Special weather statement, Aug 2, 3:57 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 10:36 AM MDTSpecial Weather StatementGGWDawson54 min
Aug 2, 11:47 AM MDTSpecial Weather StatementGGWGarfield58 min
Aug 2, 12:47 PM MDTSpecial Weather StatementGGWGarfield58 min
Aug 2, 1:41 PM MDTSpecial Weather StatementGGWDawson64 min
Aug 2, 2:40 PM MDTSevere Thunderstorm WarningGGWDawson, Prairie, Wibaux62 min
Aug 2, 3:03 PM MDTSpecial Weather StatementGGWDaniels57 min
Aug 2, 3:17 PM MDTLake Wind AdvisoryGGWGarfield, McCone, Phillips, Valley30 hr
Aug 2, 3:23 PM MDTSpecial Weather StatementGGWWibaux22 min

Nearby

Special Weather Statements in Montana, 2012Every special weather statement in 2012

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.