Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 166, NWS Glasgow, MT

July 26, 2001Garfield County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 26, 2001, 4:15 PM MDT for Garfield County, Montana. It was in force for 60 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 26, 2001, 4:15 PM MDT (22:15 UTC)
Expired: Jul 26, 2001, 5:15 PM MDT
In force: 60 min
Issued by: NWS Glasgow, MT
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Garfield County, MT

What was reported inside it

Time	Report	Where	Remark
Jul 26, 4:38 PM MDT	Thunderstorm Wind 52 M	Cohagen, MT

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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 26, 3:00 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.3 hours before the alert went out and 109 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: 59 J/kg
Mixed-layer CIN: -213 J/kg
Mixed-layer LCL: 1424 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 26, 3:00 PM MDT, 1 hour 15 minutes earlier.

Area forecast discussion, Jul 26, 3:00 PM MDT, 1 hour 15 minutes before

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In the hours before

Local storm report, Jul 26, 3:15 PM MDT, 1 hour 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 25, 6:08 PM MDT	Severe Thunderstorm Warning	GGW	Prairie	67 min
Jul 25, 6:46 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	59 min
Jul 26, 10:13 AM MDT	Severe Thunderstorm Warning	GGW	Phillips	62 min
Jul 26, 10:30 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	60 min
Jul 26, 11:13 AM MDT	Severe Thunderstorm Warning	GGW	Valley	62 min
Jul 26, 12:39 PM MDT	Flash Flood Warning	GGW	Garfield	6 hr
Jul 26, 2:12 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	63 min
Jul 26, 3:15 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	60 min
Jul 26, 5:55 PM MDT	Severe Thunderstorm Warning	GGW	Wibaux	65 min

Nearby

Severe Thunderstorm Warnings in Montana, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.