Alert archive / Montana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 52, NWS Glasgow, MT

July 22, 2014Prairie County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 22, 2014, 3:56 PM MDT for Prairie County, Montana. It was in force for 29 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 22, 2014, 3:56 PM MDT (21:56 UTC)
Expired: Jul 22, 2014, 4:25 PM MDT
In force: 29 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Prairie County, MT

The radar

The Glasgow radar (KGGW), 176 km from the middle of the area, began a volume at 21:57 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.

Issued	Product	Office	Lasted
Jul 22, 2:57 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.9 hours before the alert went out and 356 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: 2 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: -30 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 22, 2:59 PM MDT, 57 minutes earlier.

Area forecast discussion, Jul 22, 2:59 PM MDT, 57 minutes before

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Hazardous weather outlook, Jul 22, 3:09 PM MDT, 47 minutes before

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In the hours before

Special weather statement, Jul 22, 1:39 PM MDT, 2 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
139 PM MDT TUE JUL 22 2014

MTZ022-222045-
GARFIELD-
139 PM MDT TUE JUL 22 2014

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHEASTERN GARFIELD COUNTY IN NORTHEAST MONTANA...

UNTIL 245 PM MDT.

AT 135 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES SOUTHWEST OF HILLSIDE...MOVING EAST AT
20 MPH ALONG THE ROSEBUD COUNTY LINE. THERE IS A SEVERE THUNDERSTORM
WARNING FOR NORTHERN ROSEBUD COUNTY UNTIL 230 PM. THE STORM WILL
CROSS HIGHWAY 22.

HAIL UP TO THE SIZE OF NICKELS IS EXPECTED WITH THIS STORM.

LOCATIONS IN THE ADVISORY INCLUDE...
   HILLSIDE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4685 10672 4686 10673 4686 10717 4710 10705
      4716 10654 4705 10609 4685 10609
TIME...MOT...LOC 1938Z 249DEG 17KT 4683 10657

FRANSEN
WEATHER.GOV/GLASGOW

Special weather statement, Jul 22, 2:44 PM MDT, 1 hour 12 minutes before

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Special weather statement, Jul 22, 3:38 PM MDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 1:39 PM MDT	Special Weather Statement	GGW	Garfield	66 min
Jul 22, 2:28 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	56 hr
Jul 22, 2:31 PM MDT	Fire Weather Watch	GGW	Garfield, McCone, Petroleum, Phillips, Valley	36 hr
Jul 22, 2:44 PM MDT	Special Weather Statement	GGW	Prairie	61 min
Jul 22, 3:38 PM MDT	Special Weather Statement	GGW	Prairie	67 min

Nearby

Severe Thunderstorm Warnings in Montana, 2014 Every severe thunderstorm warning in 2014

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.