Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

April 13, 2012Pawnee County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 13, 2012, 5:20 PM CDT for Pawnee County, Oklahoma. It was in force for 25 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: Apr 13, 2012, 5:20 PM CDT (22:20 UTC)
Expired: Apr 13, 2012, 5:45 PM CDT
In force: 25 min
Issued by: NWS Tulsa, OK

County Pawnee County, OK

The radar

The Vance AFB radar (KVNX), 115 km from the middle of the area, began a volume at 22:22 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

Lamont, OK (KLMN), launched 12:00Z, 10.3 hours before the alert went out and 56 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: 1335 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 423 m²/s²
0-3 km storm-relative helicity: 437 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.6

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 Apr 13, 4:06 PM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Apr 13, 4:06 PM CDT, 1 hour 14 minutes before

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Hazardous weather outlook, Apr 13, 5:08 PM CDT, 12 minutes before

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In the hours before

Special weather statement, Apr 13, 3:17 PM CDT, 2 hours 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
317 PM CDT FRI APR 13 2012

OKZ054>056-132045-
NOWATA OK-OSAGE OK-WASHINGTON OK-
317 PM CDT FRI APR 13 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 345 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     WESTERN NOWATA...EASTERN OSAGE AND WASHINGTON

AT 317 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES WEST OF
OCHELATA...MOVING NORTHEAST AT 40 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
OCHELATA...BARTLESVILLE...DEWEY...WANN...DELAWARE AND NOWATA.

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

LAT...LON 3699 9580 3671 9557 3652 9605 3665 9620
TIME...MOT...LOC 2017Z 224DEG 36KT 3661 9606

Special weather statement, Apr 13, 4:24 PM CDT, 56 minutes before

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Local storm report, Apr 13, 4:30 PM CDT, 50 minutes before

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Special weather statement, Apr 13, 4:38 PM CDT, 42 minutes before

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Special weather statement, Apr 13, 5:05 PM CDT, 15 minutes before

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Special weather statement, Apr 13, 5:20 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
Apr 13, 3:17 PM CDT	Special Weather Statement	TSA	Washington	28 min
Apr 13, 3:45 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Washington	45 min
Apr 13, 4:24 PM CDT	Special Weather Statement	TSA	Nowata	36 min
Apr 13, 4:38 PM CDT	Special Weather Statement	TSA	Craig	37 min
Apr 13, 5:05 PM CDT	Special Weather Statement	TSA	Washington	25 min
Apr 13, 5:30 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	19 min
Apr 13, 6:01 PM CDT	Special Weather Statement	TSA	Osage	29 min
Apr 13, 6:18 PM CDT	Special Weather Statement	TSA	Creek	27 min
Apr 13, 6:55 PM CDT	Special Weather Statement	TSA	Creek	35 min

Nearby

Special Weather Statements in Oklahoma, 2012 Every special weather statement in 2012

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.