Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

September 30, 2021Cherokee County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Sep 30, 2021, 3:22 PM CDT for Cherokee County, Oklahoma. It was in force for 23 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 30, 2021, 3:22 PM CDT (20:22 UTC)
Expired: Sep 30, 2021, 3:45 PM CDT
In force: 23 min
Issued by: NWS Tulsa, OK
Hail: 0.75 in
Wind: 40

County Cherokee County, OK

The radar

The Tulsa radar (KINX), 53 km from the middle of the area, began a volume at 20:22 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

Norman, OK (KOUN), launched 12:00Z, 8.4 hours before the alert went out and 224 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: 961 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 945 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 75 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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Sep 30, 3:07 PM CDT, 15 minutes earlier.

Area forecast discussion, Sep 30, 3:07 PM CDT, 15 minutes before

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Hazardous weather outlook, Sep 30, 1:09 PM CDT, 2 hours 13 minutes before

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In the hours before

Special weather statement, Sep 30, 12:45 PM CDT, 2 hours 37 minutes before

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Special weather statement, Sep 30, 1:54 PM CDT, 1 hour 28 minutes before

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Special weather statement, Sep 30, 1:59 PM CDT, 1 hour 23 minutes before

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Special weather statement, Sep 30, 2:14 PM CDT, 1 hour 8 minutes before

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Special weather statement, Sep 30, 2:40 PM CDT, 42 minutes before

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Special weather statement, Sep 30, 3:22 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 30, 12:45 PM CDT	Special Weather Statement	TSA	Creek	30 min
Sep 30, 12:56 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	34 min
Sep 30, 1:28 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	23 min
Sep 30, 1:54 PM CDT	Special Weather Statement	TSA	Tulsa	36 min
Sep 30, 1:59 PM CDT	Special Weather Statement	TSA	Tulsa	16 min
Sep 30, 2:14 PM CDT	Special Weather Statement	TSA	Rogers	31 min
Sep 30, 2:40 PM CDT	Special Weather Statement	TSA	Mayes	35 min
Sep 30, 5:16 PM CDT	Special Weather Statement	TSA	Choctaw	44 min
Sep 30, 5:19 PM CDT	Special Weather Statement	TSA	Delaware	26 min
Sep 30, 5:58 PM CDT	Special Weather Statement	TSA	Choctaw	47 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.