Alert archive / Arkansas / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

May 12, 2011Crawford County, Arkansas

NWS Tulsa, OK issued this special weather statement at May 12, 2011, 10:32 PM CDT for Crawford County, Arkansas. It was in force for 28 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: May 12, 2011, 10:32 PM CDT (03:32 UTC)
Expired: May 12, 2011, 11:00 PM CDT
In force: 28 min
Issued by: NWS Tulsa, OK

County Crawford County, AR

The radar

The Western Arkansas radar (KSRX), 31 km from the middle of the area, began a volume at 03:35 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, 3.5 hours before the alert went out and 162 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: 1521 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1233 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.8

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 May 12, 8:50 PM CDT, 1 hour 42 minutes earlier.

Area forecast discussion, May 12, 8:50 PM CDT, 1 hour 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
850 PM CDT THU MAY 12 2011

.DISCUSSION...
SCATTERED STRONG TO SEVERE THUNDERSTORMS CONTINUE ACROSS
SOUTHEASTERN OKLAHOMA AND INTO NORTHWEST ARKANSAS THIS EVENING
IN ADVANCE OF A COLD FRONT THAT IS CURRENTLY PUSHING INTO
OSAGE AND PAWNEE COUNTIES IN NORTHEAST OKLAHOMA. THESE STORMS
WILL CONTINUE TO PUSH OFF TO THE EAST-NORTHEAST WITH THE
MAJORITY OF THE ACTIVITY OUT OF THE AREA BY MIDNIGHT. MAY
ALSO SEE A FEW SHOWERS AND THUNDERSTORMS LATE TONIGHT ACROSS
NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS AS A MID-LEVEL
LOW CURRENTLY OVER CENTRAL KANSAS MOVES TO THE SOUTHEAST
AND THE AFOREMENTIONED COLD FRONT MOVES THROUGH THE REGION.

WILL CONTINUE TO MAKE ADJUSTMENTS TO THE GRIDS OVER THE NEXT
COUPLE OF HOURS AS THE SITUATION ACROSS THE AREA REMAINS FLUID.

&&

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

SHORT TERM...06
LONG TERM....10

Hazardous weather outlook, May 12, 10:13 PM CDT, 19 minutes before

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In the hours before

Local storm report, May 12, 9:19 PM CDT, 1 hour 13 minutes before

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Local storm report, May 12, 9:32 PM CDT, 1 hour before

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Special weather statement, May 12, 9:37 PM CDT, 55 minutes before

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Special weather statement, May 12, 9:59 PM CDT, 33 minutes before

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Local storm report, May 12, 10:04 PM CDT, 28 minutes before

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Special weather statement, May 12, 10:32 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
May 12, 7:02 PM CDT	Special Weather Statement	TSA	Delaware	28 min
May 12, 7:08 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	67 min
May 12, 7:13 PM CDT	Special Weather Statement	TSA	Mayes	32 min
May 12, 7:22 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes	38 min
May 12, 7:26 PM CDT	Areal Flood Advisory	TSA	LeFlore, Sequoyah	3 hr
May 12, 7:35 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	23 min
May 12, 8:08 PM CDT	Special Weather Statement	TSA	Pittsburg	37 min
May 12, 8:19 PM CDT	Special Weather Statement	TSA	Cherokee	26 min
May 12, 8:35 PM CDT	Flash Flood Warning	TSA	LeFlore, Sequoyah	4 hr
May 12, 8:42 PM CDT	Special Weather Statement	TSA	Pittsburg	33 min
May 12, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	68 min
May 12, 8:55 PM CDT	Special Weather Statement	TSA	Pittsburg	35 min
May 13, 12:23 AM CDT	Areal Flood Warning	TSA	LeFlore, Sequoyah	6 hr
May 12, 7:00 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	42 min
May 12, 7:01 PM CDT	Special Weather Statement	TSA	Franklin	44 min
May 12, 7:12 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	20 min
May 12, 7:15 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	26 min
May 12, 7:49 PM CDT	Areal Flood Advisory	TSA	Carroll, Franklin, Madison, Washington	56 min
May 12, 7:49 PM CDT	Special Weather Statement	TSA	Carroll	41 min
May 12, 8:12 PM CDT	Special Weather Statement	TSA	Crawford, Franklin, Sebastian	63 min
May 12, 8:57 PM CDT	Areal Flood Advisory	TSA	Carroll, Franklin, Madison, Washington	108 min
May 12, 9:00 PM CDT	Special Weather Statement	TSA	Crawford	30 min
May 12, 9:37 PM CDT	Special Weather Statement	TSA	Franklin	53 min
May 12, 9:59 PM CDT	Special Weather Statement	TSA	Franklin	46 min

Nearby

Special Weather Statements in Arkansas, 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.