Alert archive / Arkansas / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

December 19, 2012Crawford County, Arkansas

NWS Tulsa, OK issued this special weather statement at Dec 19, 2012, 9:21 PM CST for Crawford County, Arkansas. It was in force for 24 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 19, 2012, 9:21 PM CST (03:21 UTC)
Expired: Dec 19, 2012, 9:45 PM CST
In force: 24 min
Issued by: NWS Tulsa, OK

County Crawford County, AR

The radar

The Western Arkansas radar (KSRX), 32 km from the middle of the area, began a volume at 03:22 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.

What was reported inside it

Time	Report	Where	Remark
Dec 19, 9:25 PM CST	TSTM WND DMG	Fort Smith, AR	TWITTER PIC FROM KFSM SHOWS AWNING OFF OF GAS STATION NEAR ZERO AND WHEELER IN FORT SMITH. AN ICE MACHINE WAS TOSSED ACROSS THE STREET FROM THE WALMART ON ZERO. TIME ESTIMATED BASED ON RADAR.
Dec 19, 9:48 PM CST	TSTM WND DMG	7 Ne Lavaca, AR	SEVERAL HOMES AND FIRE STATION DAMAGED IN THE COMMUNITY OF RIVERDALE. NWS TULSA WILL SEND A SURVEY TEAM TO THE AREA TOMORROW TO DETERMINE IF THE DAMAGE WAS FROM A TORNADO.
Dec 19, 9:48 PM CST	TORNADO	7 Ne Lavaca, AR	MOBILE HOME WAS DAMAGED FROM A TORNADO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.4 hours before the alert went out and 156 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: 78 J/kg
Mixed-layer CIN: -223 J/kg
Mixed-layer LCL: 609 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 442 m²/s²
0-3 km storm-relative helicity: 455 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

414 
WWUS84 KTSA 200321
SPSTSA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
921 PM CST WED DEC 19 2012

ARZ019-029-200345-
CRAWFORD AR-SEBASTIAN AR-
921 PM CST WED DEC 19 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 945 PM CST
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     CRAWFORD

IN WEST CENTRAL ARKANSAS
     NORTHERN SEBASTIAN

AT 921 PM CST...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES WEST OF CEDARVILLE TO 5 MILES WEST OF MILL
CREEK...MOVING EAST AT 50 MPH. SOME LOCATIONS THAT WILL BE AFFECTED
BY THESE STORMS INCLUDE...PLEASANT HILL...MILL CREEK...CONCORD...
MULBERRY...FORT SMITH...MOUNTAINBURG...VAN BUREN...ALMA...
CEDARVILLE...KIBLER...SHIBLEY...FURRY...DYER...FIGURE FIVE...RUDY...
DORA...LOCKE AND LAKE FORT SMITH.

THIS LINE OF STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 
MPH.

LAT...LON 3566 9401 3566 9407 3558 9407 3557 9403
      3546 9406 3544 9408 3538 9408 3533 9444
      3540 9443 3548 9445 3554 9446 3574 9399
TIME...MOT...LOC 0321Z 253DEG 44KT 3555 9440 3533 9445

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 19, 7:28 PM CST	Special Weather Statement	TSA	Pittsburg	32 min
Dec 19, 7:46 PM CST	Severe Thunderstorm Warning	TSA	Pittsburg	44 min
Dec 19, 8:15 PM CST	Special Weather Statement	TSA	Latimer	45 min
Dec 19, 8:20 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Muskogee, Pittsburg, Sequoyah	40 min
Dec 19, 8:45 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Sequoyah	45 min
Dec 19, 8:50 PM CST	Special Weather Statement	TSA	Latimer, LeFlore, Pushmataha	55 min
Dec 19, 8:54 PM CST	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	36 min
Dec 19, 9:11 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	34 min
Dec 19, 9:23 PM CST	Special Weather Statement	TSA	Choctaw	67 min
Dec 19, 9:34 PM CST	Special Weather Statement	TSA	LeFlore	56 min
Dec 20, 1:09 PM CST	Wind Advisory	TSA	Adair	4 hr
Dec 19, 9:17 PM CST	Special Weather Statement	TSA	Crawford	28 min
Dec 19, 9:42 PM CST	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Sebastian	63 min
Dec 19, 9:48 PM CST	Tornado Warning	TSA	Crawford, Franklin, Sebastian	11 min
Dec 19, 10:20 PM CST	Special Weather Statement	TSA	Carroll, Madison	40 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.