Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

October 11, 2011Sequoyah County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Oct 11, 2011, 3:04 PM CDT for Sequoyah County, Oklahoma. It was in force for 26 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: Oct 11, 2011, 3:04 PM CDT (20:04 UTC)
Expired: Oct 11, 2011, 3:30 PM CDT
In force: 26 min
Issued by: NWS Tulsa, OK

County Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 28 km from the middle of the area, began a volume at 20:07 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

Springfield, MO (KSGF), launched 12:00Z, 8.1 hours before the alert went out and 176 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: 644 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Oct 11, 12:40 PM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, Oct 11, 12:40 PM CDT, 2 hours 24 minutes before

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Hazardous weather outlook, Oct 11, 11:16 AM CDT, 3 hours 48 minutes before

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In the hours before

Special weather statement, Oct 11, 3:04 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
304 PM CDT TUE OCT 11 2011

OKZ072-076-112030-
LE FLORE OK-SEQUOYAH OK-
304 PM CDT TUE OCT 11 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 330 PM CDT
FOR THE FOLLOWING COUNTIES...

IN SOUTHEAST OKLAHOMA
     NORTHEASTERN LE FLORE

IN EAST CENTRAL OKLAHOMA
     EASTERN SEQUOYAH

AT 304 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER GANS...MOVING
NORTHEAST AT 25 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...GANS...
MULDROW...ROLAND...ARKOMA AND SHORT.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL AND WIND
GUSTS TO 40 MPH.

LAT...LON 3563 9448 3534 9444 3525 9473 3541 9485
TIME...MOT...LOC 2004Z 239DEG 23KT 3537 9470

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 3:26 PM CDT	Special Weather Statement	TSA	Crawford	34 min
Oct 11, 4:44 PM CDT	Special Weather Statement	TSA	Benton	46 min
Oct 11, 5:31 PM CDT	Special Weather Statement	TSA	Franklin	44 min
Oct 11, 6:00 PM CDT	Special Weather Statement	TSA	Carroll	45 min
Oct 11, 6:07 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	53 min
Oct 11, 6:57 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	33 min

Nearby

Special Weather Statements in Oklahoma, 2011 Every special weather statement in 2011

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.