Alert archive / Oklahoma / Special Weather Statements in 2023

Special Weather Statement, NWS Norman, OK

May 11, 2023Ellis County, Harper County, Roger Mills County, Oklahoma

NWS Norman, OK issued this special weather statement at May 11, 2023, 7:37 AM CDT for Ellis County, Harper County, Roger Mills County, Oklahoma. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 11, 2023, 7:37 AM CDT (12:37 UTC)
Expired: May 11, 2023, 8:15 AM CDT
In force: 38 min
Issued by: NWS Norman, OK
Hail: 0.00 in
Wind: 50

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

The radar

The Vance AFB radar (KVNX), 154 km from the middle of the area, began a volume at 12:37 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

Dodge City, (KDDC), launched 12:00Z, 0.6 hours before the alert went out and 171 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: 520 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 736 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 11, 6:39 AM CDT, 58 minutes earlier.

Area forecast discussion, May 11, 6:39 AM CDT, 58 minutes before

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Hazardous weather outlook, May 11, 4:56 AM CDT, 2 hours 41 minutes before

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In the hours before

Special weather statement, May 11, 5:42 AM CDT, 1 hour 55 minutes before

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Special weather statement, May 11, 6:14 AM CDT, 1 hour 23 minutes before

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Special weather statement, May 11, 6:44 AM CDT, 53 minutes before

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Special weather statement, May 11, 6:58 AM CDT, 39 minutes before

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Special weather statement, May 11, 7:37 AM CDT, 0 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
May 10, 7:00 PM CDT	Areal Flood Advisory	OUN	Pottawatomie	3 hr
May 10, 7:44 PM CDT	Flash Flood Warning	OUN	Pottawatomie	3 hr
May 10, 9:14 PM CDT	Special Weather Statement	OUN	Kay	31 min
May 10, 11:16 PM CDT	Special Weather Statement	OUN	Kay	29 min
May 11, 5:42 AM CDT	Special Weather Statement	OUN	Harmon	33 min
May 11, 6:14 AM CDT	Special Weather Statement	OUN	Greer, Harmon, Jackson	31 min
May 11, 6:44 AM CDT	Special Weather Statement	OUN	Greer, Jackson	46 min
May 11, 6:58 AM CDT	Special Weather Statement	OUN	Ellis, Harper, Roger Mills	47 min
May 11, 8:00 AM CDT	Special Weather Statement	OUN	Cotton	30 min
May 11, 8:02 AM CDT	Special Weather Statement	OUN	Jackson	28 min
May 11, 10:00 AM CDT	Special Weather Statement	OUN	Blaine, Custer, Dewey, Major	60 min
May 11, 10:02 AM CDT	Special Weather Statement	OUN	Jefferson	28 min
May 11, 10:17 AM CDT	Special Weather Statement	OUN	Cotton	28 min
May 11, 10:32 AM CDT	Special Weather Statement	OUN	Jefferson	28 min
May 11, 10:34 AM CDT	Special Weather Statement	OUN	Stephens	26 min
May 11, 10:57 AM CDT	Special Weather Statement	OUN	Stephens	33 min
May 11, 4:58 PM CDT	Special Weather Statement	OUN	Cotton	32 min
May 11, 5:02 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	43 min
May 11, 5:43 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	28 min
May 11, 6:03 PM CDT	Special Weather Statement	OUN	Grady	27 min
May 11, 6:05 PM CDT	Special Weather Statement	OUN	Kingfisher	25 min
May 11, 6:18 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	42 min
May 11, 6:30 PM CDT	Special Weather Statement	OUN	Grady	30 min
May 11, 6:50 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady, Oklahoma	40 min
May 11, 7:24 AM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita	36 min
May 11, 12:52 PM CDT	Special Weather Statement	OUN	Archer	38 min
May 11, 6:14 PM CDT	Special Weather Statement	OUN	Clay	31 min
May 11, 6:51 PM CDT	Special Weather Statement	OUN	Clay	24 min

Nearby

Special Weather Statements in Oklahoma, 2023 Every special weather statement in 2023

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.