Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

August 20, 2011McIntosh County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Aug 20, 2011, 2:30 PM CDT for McIntosh County, Oklahoma. It was in force for 30 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: Aug 20, 2011, 2:30 PM CDT (19:30 UTC)
Expired: Aug 20, 2011, 3:00 PM CDT
In force: 30 min
Issued by: NWS Tulsa, OK

County McIntosh County, OK

The radar

The Tulsa radar (KINX), 96 km from the middle of the area, began a volume at 19:30 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, 7.5 hours before the alert went out and 163 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: 141 J/kg
Mixed-layer CIN: -265 J/kg
Mixed-layer LCL: 2507 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -118 m²/s²
0-3 km storm-relative helicity: -58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 20, 12:30 PM CDT, 2 hours earlier.

Area forecast discussion, Aug 20, 12:30 PM CDT, 2 hours before

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Hazardous weather outlook, Aug 20, 1:28 PM CDT, 1 hour 2 minutes before

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In the hours before

Special weather statement, Aug 20, 2:30 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
230 PM CDT SAT AUG 20 2011

OKZ071-073-202000-
MCINTOSH OK-PITTSBURG OK-
230 PM CDT SAT AUG 20 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 300 PM CDT
FOR THE FOLLOWING COUNTIES...

IN SOUTHEAST OKLAHOMA
     CENTRAL MCINTOSH AND NORTHERN PITTSBURG

AT 230 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES SOUTHWEST
OF EUFAULA...MOVING NORTHEAST AT 20 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...EUFAULA AND LAKE EUFAULA STATE PARK.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH.

LAT...LON 3543 9560 3535 9549 3529 9554 3519 9565
      3520 9574
TIME...MOT...LOC 1930Z 217DEG 19KT 3525 9566

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 3:36 PM CDT	Heat Advisory	TSA	Cherokee, Choctaw, Creek, Haskell, Latimer, McIntosh and 11 more	28 hr
Aug 20, 3:50 PM CDT	Special Weather Statement	TSA	Haskell	25 min
Aug 20, 4:25 PM CDT	Special Weather Statement	TSA	Haskell	35 min
Aug 20, 4:29 PM CDT	Special Weather Statement	TSA	Okmulgee	31 min
Aug 20, 4:33 PM CDT	Special Weather Statement	TSA	McIntosh	27 min
Aug 20, 5:32 PM CDT	Special Weather Statement	TSA	Okfuskee	28 min
Aug 20, 5:29 PM CDT	Special Weather Statement	TSA	Sebastian	31 min
Aug 20, 5:46 PM CDT	Special Weather Statement	TSA	Franklin	29 min
Aug 20, 5:58 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	47 min
Aug 20, 6:11 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	49 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.