Alert archive / Oklahoma / Red Flag Warnings in 2010

Red Flag Warning 9, NWS Norman, OK

April 5, 20105 counties in Oklahoma

NWS Norman, OK issued this red flag warning at Apr 5, 2010, 3:29 AM CDT for 5 counties in Oklahoma. It took effect at Apr 5, 2010, 11:00 AM CDT. It was in force for 8 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: Apr 5, 2010, 3:29 AM CDT (08:29 UTC)
In effect from: Apr 5, 2010, 11:00 AM CDT
Expired: Apr 5, 2010, 6:38 PM CDT
In force: 8 hr
Issued by: NWS Norman, OK

Counties Ellis County, OK, Harper County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 125 km from the middle of the area, began a volume at 08:30 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 nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 8.5 hours before the alert went out and 178 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: 1163 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1728 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.1

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 Norman, OK wrote its last area forecast discussion before this red flag warning went out at Apr 5, 3:29 AM CDT, 0 minutes earlier.

Area forecast discussion, Apr 5, 3:29 AM CDT, 0 minutes before

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Hazardous weather outlook, Apr 4, 11:40 PM CDT, 3 hours 49 minutes before

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In the hours before

Special weather statement, Apr 4, 10:13 PM CDT, 5 hours 16 minutes before

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Local storm report, Apr 4, 10:17 PM CDT, 5 hours 12 minutes before

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Special weather statement, Apr 4, 10:17 PM CDT, 5 hours 12 minutes before

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Local storm report, Apr 4, 10:37 PM CDT, 4 hours 52 minutes before

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Local storm report, Apr 4, 10:44 PM CDT, 4 hours 45 minutes before

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Special weather statement, Apr 5, 12:58 AM CDT, 2 hours 31 minutes before

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 4, 8:20 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Major	55 min
Apr 4, 9:05 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	55 min
Apr 4, 9:11 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	64 min
Apr 4, 9:41 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher, Major	64 min
Apr 4, 10:32 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble	30 min
Apr 5, 1:30 AM CDT	Severe Thunderstorm Warning	OUN	Grant	45 min
Apr 5, 2:06 AM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	39 min
Apr 5, 2:40 AM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	65 min
Apr 5, 3:29 AM CDT	Fire Weather Watch	OUN	Alfalfa, Beckham, Custer, Dewey, Ellis, Greer and 10 more	25 hr

Nearby

Red Flag Warnings in Oklahoma, 2010 Every red flag warning in 2010

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.