Alert archive / Montana / Special Weather Statements in 2015

Special Weather Statement, NWS Glasgow, MT

July 1, 2015Valley County, Montana

NWS Glasgow, MT issued this special weather statement at Jul 1, 2015, 2:21 PM MDT for Valley County, Montana. It was in force for 54 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: Jul 1, 2015, 2:21 PM MDT (20:21 UTC)
Expired: Jul 1, 2015, 3:15 PM MDT
In force: 54 min
Issued by: NWS Glasgow, MT

County Valley County, MT

The radar

The Glasgow radar (KGGW), 52 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 nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 8.4 hours before the alert went out and 50 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: 757 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 116 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 Jul 1, 9:16 AM MDT, 5 hours 5 minutes earlier.

Area forecast discussion, Jul 1, 9:16 AM MDT, 5 hours 5 minutes before

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Hazardous weather outlook, Jul 1, 3:45 AM MDT, 10 hours 36 minutes before

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In the hours before

Special weather statement, Jul 1, 2:21 PM MDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
221 PM MDT WED JUL 1 2015

MTZ017-012115-
VALLEY-
221 PM MDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EASTERN VALLEY COUNTY IN NORTHEAST MONTANA...

UNTIL 315 PM MDT.

AT 219 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES WEST OF LUSTRE...MOVING SOUTHEAST AT 15
MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IN THE ADVISORY INCLUDE...
  RURAL AREAS OF EASTERN VALLEY COUNTY...

LAT...LON 4831 10580 4822 10580 4822 10581 4822 10584
      4820 10585 4813 10606 4845 10625 4850 10614
TIME...MOT...LOC 2021Z 327DEG 14KT 4840 10612

MICKELSON
WEATHER.GOV/GLASGOW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 6:00 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	42 min
Jun 30, 6:19 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Richland, Roosevelt	56 min
Jun 30, 7:11 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	46 min
Jul 1, 2:39 PM MDT	Special Weather Statement	GGW	Phillips	66 min
Jul 1, 2:58 PM MDT	Special Weather Statement	GGW	Valley	62 min
Jul 1, 3:06 PM MDT	Special Weather Statement	GGW	Roosevelt	54 min
Jul 1, 3:09 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Roosevelt, Valley	66 min
Jul 1, 3:20 PM MDT	Special Weather Statement	GGW		55 min
Jul 1, 3:48 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	57 min
Jul 1, 4:05 PM MDT	Special Weather Statement	GGW	McCone	55 min
Jul 1, 4:14 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	37 min
Jul 1, 4:20 PM MDT	Special Weather Statement	GGW	McCone	55 min
Jul 1, 4:32 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	43 min
Jul 1, 4:47 PM MDT	Special Weather Statement	GGW	Daniels	58 min
Jul 1, 4:57 PM MDT	Special Weather Statement	GGW	Dawson, McCone, Prairie	63 min
Jul 1, 5:24 PM MDT	Special Weather Statement	GGW	Roosevelt	66 min
Jul 1, 5:27 PM MDT	Special Weather Statement	GGW	Valley	63 min
Jul 1, 5:48 PM MDT	Special Weather Statement	GGW	Phillips	57 min
Jul 1, 5:58 PM MDT	Special Weather Statement	GGW	Dawson	62 min

Nearby

Special Weather Statements in Montana, 2015 Every special weather statement in 2015

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.