Alert archive / Montana / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 63, NWS Glasgow, MT

June 17, 2007Dawson County, Richland County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 17, 2007, 5:29 AM MDT for Dawson County, Richland County, Montana. It was in force for 61 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, 5:29 AM MDT (11:29 UTC)
Expired: Jun 17, 2007, 6:30 AM MDT
In force: 61 min
Issued by: NWS Glasgow, MT
Area: Counties, with a storm outline in the text

Counties Dawson County, MT, Richland County, MT

The radar

The Glasgow radar (KGGW), 160 km from the middle of the area, began a volume at 11:30 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 00:00Z, 11.5 hours before the alert went out and 159 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: 205 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1742 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 388 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.7

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 Jun 17, 3:34 AM MDT, 1 hour 55 minutes earlier.

Area forecast discussion, Jun 17, 3:34 AM MDT, 1 hour 55 minutes before

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Hazardous weather outlook, Jun 17, 3:27 AM MDT, 2 hours 2 minutes before

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In the hours before

Local storm report, Jun 17, 12:26 AM MDT, 5 hours 3 minutes before

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Local storm report, Jun 17, 12:37 AM MDT, 4 hours 52 minutes before

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Local storm report, Jun 17, 2:22 AM MDT, 3 hours 7 minutes before

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Local storm report, Jun 17, 2:53 AM MDT, 2 hours 36 minutes before

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Local storm report, Jun 17, 4:53 AM MDT, 36 minutes before

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Local storm report, Jun 17, 4:59 AM MDT, 30 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
Jun 16, 6:14 PM MDT	Tornado Warning	GGW	Garfield, McCone, Roosevelt, Valley	61 min
Jun 16, 6:20 PM MDT	Flash Flood Warning	GGW	Garfield, McCone, Roosevelt, Valley	3 hr
Jun 16, 7:03 PM MDT	Tornado Warning	GGW	Dawson, McCone, Richland, Roosevelt	57 min
Jun 16, 7:43 PM MDT	Flash Flood Warning	GGW	Dawson, McCone, Richland, Roosevelt	3 hr
Jun 16, 7:47 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	58 min
Jun 16, 7:56 PM MDT	Tornado Warning	GGW	Dawson, McCone, Richland	64 min
Jun 16, 8:58 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	10 min
Jun 16, 9:03 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	57 min
Jun 16, 9:08 PM MDT	Flash Flood Warning	GGW	Valley	3 hr
Jun 16, 9:14 PM MDT	Severe Thunderstorm Warning	GGW	Richland	46 min
Jun 16, 9:25 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Valley	65 min
Jun 16, 10:15 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	60 min
Jun 16, 10:27 PM MDT	Flash Flood Warning	GGW	Garfield, McCone, Roosevelt, Valley	6 hr
Jun 16, 10:40 PM MDT	Flash Flood Warning	GGW	Dawson, McCone, Richland, Roosevelt	6 hr
Jun 16, 11:20 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	25 min
Jun 16, 11:45 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	47 min
Jun 17, 12:09 AM MDT	Flash Flood Warning	GGW	Valley	4 hr
Jun 17, 12:31 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	44 min
Jun 17, 1:17 AM MDT	Severe Thunderstorm Warning	GGW	Petroleum	43 min
Jun 17, 1:27 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum	48 min
Jun 17, 2:11 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	64 min
Jun 17, 2:26 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone	64 min
Jun 17, 3:04 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	56 min
Jun 17, 3:15 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Phillips, Valley	18 hr
Jun 17, 3:26 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	64 min
Jun 17, 3:58 AM MDT	Severe Thunderstorm Warning	GGW	Prairie	47 min
Jun 17, 4:25 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	47 min
Jun 17, 4:40 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	65 min
Jun 17, 5:09 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	29 min
Jun 17, 6:09 AM MDT	Severe Thunderstorm Warning	GGW	Richland	35 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.