Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Norman, OK

May 7, 20217 counties in Oklahoma

NWS Norman, OK issued this special weather statement at May 7, 2021, 11:15 PM CDT for 7 counties in Oklahoma. It was in force for 45 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 7, 2021, 11:15 PM CDT (04:15 UTC)
Expired: May 8, 2021, 12:00 AM CDT
In force: 45 min
Issued by: NWS Norman, OK

Counties Blaine County, OK, Canadian County, OK, Garfield County, OK, Kingfisher County, OK, Major County, OK, Oklahoma County, OK, Washita County, OK

The radar

The Vance AFB radar (KVNX), 93 km from the middle of the area, began a volume at 04:15 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 00:00Z, 4.3 hours before the alert went out and 263 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: 684 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 2461 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

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 7, 10:49 PM CDT, 26 minutes earlier.

Area forecast discussion, May 7, 10:49 PM CDT, 26 minutes before

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Hazardous weather outlook, May 7, 10:40 PM CDT, 35 minutes before

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In the hours before

Special weather statement, May 7, 7:58 PM CDT, 3 hours 17 minutes before

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Special weather statement, May 7, 8:39 PM CDT, 2 hours 36 minutes before

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Special weather statement, May 7, 9:18 PM CDT, 1 hour 57 minutes before

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Special weather statement, May 7, 9:47 PM CDT, 1 hour 28 minutes before

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Special weather statement, May 7, 10:18 PM CDT, 57 minutes before

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Special weather statement, May 7, 11:15 PM 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 7, 7:12 PM CDT	Special Weather Statement	OUN	Ellis	33 min
May 7, 7:14 PM CDT	Special Weather Statement	OUN	Woodward	31 min
May 7, 7:28 PM CDT	Special Weather Statement	OUN	Roger Mills	32 min
May 7, 7:58 PM CDT	Special Weather Statement	OUN	Ellis, Roger Mills	47 min
May 7, 8:39 PM CDT	Special Weather Statement	OUN	Dewey	36 min
May 7, 9:18 PM CDT	Special Weather Statement	OUN	Major	27 min
May 7, 9:47 PM CDT	Special Weather Statement	OUN	Major	28 min
May 7, 10:18 PM CDT	Special Weather Statement	OUN	Blaine, Kingfisher, Major	57 min
May 7, 11:31 PM CDT	High Wind Warning	OUN	Alfalfa, Garfield, Grant, Major	82 min

Nearby

Special Weather Statements in Oklahoma, 2021 Every special weather statement in 2021

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.