Alert archive / Montana / Red Flag Warnings in 2011

Red Flag Warning 10, NWS Glasgow, MT

September 27, 201112 counties in Montana

NWS Glasgow, MT issued this red flag warning at Sep 27, 2011, 2:49 PM MDT for 12 counties in Montana. It took effect at Sep 28, 2011, 10:00 AM MDT. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 27, 2011, 2:49 PM MDT (20:49 UTC)
In effect from: Sep 28, 2011, 10:00 AM MDT
Expired: Sep 28, 2011, 8:03 PM MDT
In force: 10 hr
Issued by: NWS Glasgow, MT

Counties Daniels County, MT, Dawson County, MT, Garfield County, MT, McCone County, MT, Petroleum County, MT, Phillips County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT

The radar

The Glasgow radar (KGGW), 77 km from the middle of the area, began a volume at 20:49 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, 8.8 hours before the alert went out and 76 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: 2331 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 209 m²/s²
0-3 km storm-relative helicity: 173 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 red flag 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 red flag warning went out at Sep 27, 10:11 AM MDT, 4 hours 38 minutes earlier.

Area forecast discussion, Sep 27, 10:11 AM MDT, 4 hours 38 minutes before

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Hazardous weather outlook, Sep 27, 10:15 AM MDT, 4 hours 34 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 27, 9:59 AM MDT	Red Flag Warning	GGW	Phillips, Valley	34 hr
Sep 27, 2:27 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	30 hr

Nearby

Red Flag Warnings in Montana, 2011 Every red flag warning in 2011

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.