Alert archive / Arkansas / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

February 29, 2012Washington County, Arkansas

NWS Tulsa, OK issued this special weather statement at Feb 29, 2012, 1:45 AM CST for Washington County, Arkansas. 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: Feb 29, 2012, 1:45 AM CST (07:45 UTC)
Expired: Feb 29, 2012, 2:15 AM CST
In force: 30 min
Issued by: NWS Tulsa, OK

County Washington County, AR

The radar

The Western Arkansas radar (KSRX), 83 km from the middle of the area, began a volume at 07:47 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 00:00Z, 7.8 hours before the alert went out and 104 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: 75 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 595 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 482 m²/s²
0-3 km storm-relative helicity: 563 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

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 Feb 28, 11:24 PM CST, 2 hours 21 minutes earlier.

Area forecast discussion, Feb 28, 11:24 PM CST, 2 hours 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1124 PM CST TUE FEB 28 2012

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
LINE OF STORMS HAS CLEARED KBVO AND SHOULD CLEAR KRVS AND
KTUL BY 06Z. THUNDERSTORMS ARE EXPECTED TO AFFECT THE REMAINING
TAF SITES THROUGH 11Z. SKIES ARE EXPECTED TO CLEAR OUT A FEW
HOURS AFTER THE THUNDERSTORMS MOVE PAST THE AFFECTED TAF SITE.
VFR CONDITIONS ARE EXPECTED ON WEDNESDAY.

&&

.PREV DISCUSSION... /ISSUED 920 PM CST TUE FEB 28 2012/

..UPDATE...

DISCUSSION...
AS A COLD FRONT AND LINE OF STRONG STORMS ENTER THE NW PORTION OF
THE FORECAST AREA... HAVE UPDATED THE FORECAST TO INCREASE POPS
AND WIND GUSTS ACROSS THE NORTHERN HALF OF THE REGION. UPDATED
PRODUCTS HAVE ALL BEEN SENT.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

AVIATION...10

Hazardous weather outlook, Feb 29, 1:21 AM CST, 24 minutes before

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In the hours before

Special weather statement, Feb 28, 11:48 PM CST, 1 hour 57 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1148 PM CST TUE FEB 28 2012

OKZ067-068-070-290615-
CHEROKEE OK-MUSKOGEE OK-WAGONER OK-
1148 PM CST TUE FEB 28 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1215 AM CST
FOR THE FOLLOWING COUNTIES...

IN EAST CENTRAL OKLAHOMA
     WESTERN CHEROKEE AND NORTHEASTERN MUSKOGEE

IN NORTHEAST OKLAHOMA
     SOUTHEASTERN WAGONER

AT 1149 PM CST...A STRONG THUNDERSTORM WAS LOCATED OVER CHOSKA...
MOVING EAST AT 50 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...PORTER...
TULLAHASSEE...WAGONER...OKAY...FORT GIBSON...SEQUOYAH STATE PARK AND
HULBERT.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3607 9514 3580 9501 3576 9561 3586 9569
TIME...MOT...LOC 0549Z 254DEG 41KT 3584 9557

Special weather statement, Feb 29, 12:28 AM CST, 1 hour 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1228 AM CST WED FEB 29 2012

OKZ073-290700-
PITTSBURG OK-
1228 AM CST WED FEB 29 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 100 AM CST
FOR THE FOLLOWING COUNTY...

IN SOUTHEAST OKLAHOMA
     CENTRAL PITTSBURG

AT 1228 AM CST...A STRONG THUNDERSTORM WAS LOCATED 2 MILES NORTHWEST
OF HAYWOOD...MOVING EAST AT 75 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
MCALESTER...KREBS...ALDERSON...CROWDER...CANADIAN...ARROWHEAD STATE
PARK AND BLOCKER.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3525 9554 3489 9552 3482 9596 3499 9602
TIME...MOT...LOC 0628Z 253DEG 65KT 3493 9588

Local storm report, Feb 29, 12:45 AM CST, 1 hour before

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Special weather statement, Feb 29, 12:58 AM CST, 47 minutes before

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Local storm report, Feb 29, 1:24 AM CST, 21 minutes before

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Special weather statement, Feb 29, 1:45 AM CST, 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
Feb 28, 9:01 PM CST	Severe Thunderstorm Warning	TSA	Osage	44 min
Feb 28, 9:41 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Osage, Pawnee, Washington	64 min
Feb 28, 10:15 PM CST	Special Weather Statement	TSA	Creek, Tulsa	30 min
Feb 28, 10:31 PM CST	Special Weather Statement	TSA	Creek, Okmulgee, Tulsa	29 min
Feb 28, 10:47 PM CST	Severe Thunderstorm Warning	TSA	Craig, Nowata, Ottawa, Washington	58 min
Feb 28, 10:57 PM CST	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Tulsa, Wagoner	48 min
Feb 28, 11:31 PM CST	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	30 min
Feb 28, 11:44 PM CST	Severe Thunderstorm Warning	TSA	Ottawa	20 min
Feb 28, 11:48 PM CST	Special Weather Statement	TSA	Wagoner	27 min
Feb 28, 11:53 PM CST	Severe Thunderstorm Warning	TSA	Delaware	52 min
Feb 28, 11:57 PM CST	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	48 min
Feb 29, 12:28 AM CST	Special Weather Statement	TSA	Pittsburg	32 min
Feb 29, 12:36 AM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee	39 min
Feb 29, 12:58 AM CST	Special Weather Statement	TSA	Latimer	32 min
Feb 29, 4:14 AM CST	Fire Weather Watch	TSA	Craig, Creek, Delaware, Mayes, Nowata, Okfuskee and 7 more	23 hr
Feb 29, 4:14 AM CST	Red Flag Warning	TSA	Craig, Nowata, Ottawa	14 hr
Feb 29, 12:25 AM CST	Tornado Warning	TSA	Benton	15 min
Feb 29, 12:56 AM CST	Severe Thunderstorm Warning	TSA	Benton, Washington	33 min
Feb 29, 1:09 AM CST	Severe Thunderstorm Warning	TSA	Madison, Washington	33 min
Feb 29, 1:28 AM CST	Tornado Warning	TSA	Carroll, Madison, Washington	32 min
Feb 29, 1:56 AM CST	Severe Thunderstorm Warning	TSA	Madison	34 min
Feb 29, 1:58 AM CST	Severe Thunderstorm Warning	TSA	Carroll, Madison	15 min

Nearby

Special Weather Statements in Arkansas, 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.