Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Norman, OK

September 8, 2021Bryan County, Oklahoma

NWS Norman, OK issued this special weather statement at Sep 8, 2021, 4:55 AM CDT for Bryan County, Oklahoma. It was in force for 35 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: Sep 8, 2021, 4:55 AM CDT (09:55 UTC)
Expired: Sep 8, 2021, 5:30 AM CDT
In force: 35 min
Issued by: NWS Norman, OK
Hail: 0.25 in
Wind: 40

County Bryan County, OK

The radar

The Dallas/Ft Worth radar (KFWS), 189 km from the middle of the area, began a volume at 09:56 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

Fort Worth, TX (KFWD), launched 00:00Z, 9.9 hours before the alert went out and 168 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: 344 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 2426 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 93 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 Sep 8, 2:30 AM CDT, 2 hours 25 minutes earlier.

Area forecast discussion, Sep 8, 2:30 AM CDT, 2 hours 25 minutes before

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Hazardous weather outlook, Sep 8, 4:00 AM CDT, 55 minutes before

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In the hours before

Special weather statement, Sep 8, 12:40 AM CDT, 4 hours 15 minutes before

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Special weather statement, Sep 8, 4:55 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
Sep 7, 7:15 PM CDT	Special Weather Statement	OUN	Roger Mills	30 min
Sep 7, 7:21 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Blaine, Dewey, Kingfisher, Major	39 min
Sep 7, 7:43 PM CDT	Special Weather Statement	OUN	Noble	32 min
Sep 7, 7:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Blaine, Canadian, Custer, Dewey, Kingfisher	39 min
Sep 7, 8:02 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Noble, Payne	25 min
Sep 7, 8:21 PM CDT	Special Weather Statement	OUN	Custer	24 min
Sep 7, 8:27 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	33 min
Sep 7, 8:46 PM CDT	Special Weather Statement	OUN	Custer	29 min
Sep 7, 9:11 PM CDT	Special Weather Statement	OUN	Beckham	34 min
Sep 7, 9:19 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer	41 min
Sep 7, 9:23 PM CDT	Special Weather Statement	OUN	Washita	37 min
Sep 7, 9:40 PM CDT	Special Weather Statement	OUN	Kay	35 min
Sep 8, 12:40 AM CDT	Special Weather Statement	OUN	Cotton	35 min
Sep 8, 5:31 AM CDT	Special Weather Statement	OUN	Bryan	29 min
Sep 8, 6:10 AM CDT	Special Weather Statement	OUN	Bryan	35 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.