Alert archive / Montana / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 74, NWS Billings, MT

June 17, 2007Custer County, Fallon County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 17, 2007, 6:00 AM MDT for Custer County, Fallon County, Montana. It was in force for 37 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: Jun 17, 2007, 6:00 AM MDT (12:00 UTC)
Expired: Jun 17, 2007, 6:37 AM MDT
In force: 37 min
Issued by: NWS Billings, MT
Area: Counties, with a storm outline in the text

Counties Custer County, MT, Fallon County, MT

The radar

The Glasgow radar (KGGW), 246 km from the middle of the area, began a volume at 12:04 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
Jun 17, 4:40 AM MDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 0.0 hours before the alert went out and 246 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: 5 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 929 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: -75 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 Billings, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 5:09 AM MDT, 51 minutes earlier.

Area forecast discussion, Jun 17, 5:09 AM MDT, 51 minutes before

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Hazardous weather outlook, Jun 17, 5:18 AM MDT, 42 minutes before

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In the hours before

Local storm report, Jun 17, 2:47 AM MDT, 3 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
247 AM MDT SUN JUN 17 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0244 AM     HAIL             5 S RYEGATE             46.23N 109.25W
06/17/2007  M1.75 INCH       GOLDEN VALLEY      MT   TRAINED SPOTTER

            BROKEN WINDOWS.

&&

SOLUM

Local storm report, Jun 17, 2:50 AM MDT, 3 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
250 AM MDT SUN JUN 17 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0235 AM     HAIL             15 NE ROUNDUP           46.60N 108.32W
06/17/2007  M1.75 INCH       MUSSELSHELL        MT   TRAINED SPOTTER

&&

SOLUM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 6:26 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	79 min
Jun 16, 7:24 PM MDT	Severe Thunderstorm Warning	BYZ	Treasure	35 min
Jun 17, 12:52 AM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	48 min
Jun 17, 2:06 AM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	54 min
Jun 17, 2:16 AM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Wheatland	44 min
Jun 17, 2:56 AM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Sweet Grass, Wheatland	25 min
Jun 17, 2:56 AM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud, Treasure, Yellowstone	64 min
Jun 17, 3:03 AM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Yellowstone	57 min
Jun 17, 3:26 AM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Yellowstone	64 min
Jun 17, 3:47 AM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	58 min
Jun 17, 3:56 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud, Treasure	64 min
Jun 17, 4:02 AM MDT	Tornado Warning	BYZ	Custer, Rosebud	28 min
Jun 17, 4:08 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure, Yellowstone	67 min
Jun 17, 4:40 AM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	65 min
Jun 17, 4:46 AM MDT	Severe Thunderstorm Warning	BYZ	Custer	29 min

Nearby

Severe Thunderstorm Warnings in Montana, 2007 Every severe thunderstorm warning in 2007

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.