Alert archive / Arkansas / Special Weather Statements in 2013

Special Weather Statement, NWS Tulsa, OK

August 12, 2013Franklin County, Arkansas

NWS Tulsa, OK issued this special weather statement at Aug 12, 2013, 3:12 PM CDT for Franklin County, Arkansas. It was in force for 33 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 12, 2013, 3:12 PM CDT (20:12 UTC)
Expired: Aug 12, 2013, 3:45 PM CDT
In force: 33 min
Issued by: NWS Tulsa, OK

County Franklin County, AR

The radar

The Western Arkansas radar (KSRX), 46 km from the middle of the area, began a volume at 20:12 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 12:00Z, 8.2 hours before the alert went out and 174 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: 1965 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 698 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.9

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 12, 3:07 PM CDT, 5 minutes earlier.

Area forecast discussion, Aug 12, 3:07 PM CDT, 5 minutes before

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Hazardous weather outlook, Aug 12, 12:55 PM CDT, 2 hours 17 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1255 PM CDT MON AUG 12 2013

ARZ001-002-010-011-019-020-029-OKZ049-053>076-131000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
1255 PM CDT MON AUG 12 2013

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...PRIMARILY ALONG AND NORTH OF INTERSTATE 40.
	ONSET...ONGOING.

FLASH FLOOD.
	RISK...ELEVATED.
	AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...AFTERNOON.

DANGEROUS HEAT.
	RISK...LIMITED.
	AREA...SOUTHEAST OKLAHOMA.
	ONSET...AFTERNOON.

DISCUSSION...
ADDITIONAL SHOWERS AND THUNDERSTORMS HAVE DEVELOPED IN THE VICINITY
OF A SURFACE BOUNDARY THAT BECOME THE FOCUS THIS AFTERNOON. A
RISK OF SEVERE WEATHER WILL REMAIN IN PLACE THIS AFTERNOON AND
EVENING. THE BEST CHANCES FOR A SEVERE STORM WILL BE THE VICINITY
OF THE INTERSTATE 40 CORRIDOR WHERE GREATER INSTABILITY WILL BE IN
PLACE. DAMAGING WINDS WILL BE THE PRIMARY SEVERE RISK.

LATER TONIGHT...THUNDERSTORMS ARE ONCE AGAIN EXPECTED TO INCREASE
IN COVERAGE ALONG AND NORTH OF THE BOUNDARY...ALONG WITH A WITH A
LIMITED RISK OF SEVERE WEATHER. REPEATED ROUNDS OF THUNDERSTORMS
WILL RAISE THE POTENTIAL FOR EXCESSIVE RAINFALL...THEREFORE A
FLOOD WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN OKLAHOMA AND
WESTERN ARKANSAS.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...THUNDERSTORM POTENTIAL...HEAVY RAIN POTENTIAL.
WEDNESDAY AND THURSDAY...THUNDERSTORM POTENTIAL.
FRIDAY THROUGH SUNDAY...NO HAZARDS.

EXTENDED DISCUSSION...
THUNDERSTORMS ARE LIKELY TO BE ONGOING TUESDAY MORNING WITH
A RISK OF BOTH SEVERE WEATHER AND FLASH FLOODING.  ADDITIONAL
STORMS ARE LIKELY TO DEVELOP TUESDAY NIGHT INTO WEDNESDAY...
WHILE SHIFTING SLIGHTLY FURTHER SOUTH ALONG WITH THE SLOW MOVING
SURFACE FRONT. THE FRONT IS LIKELY TO PUSH NEAR THE RED RIVER BY EARLY
THURSDAY...WITH DRY AND MILD WEATHER PREVAILING FOR LATE WEEK.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Aug 12, 2:25 PM CDT, 47 minutes before

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Special weather statement, Aug 12, 2:28 PM CDT, 44 minutes before

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Special weather statement, Aug 12, 2:35 PM CDT, 37 minutes before

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Special weather statement, Aug 12, 2:39 PM CDT, 33 minutes before

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Special weather statement, Aug 12, 3:08 PM CDT, 4 minutes before

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Special weather statement, Aug 12, 3:12 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
Aug 12, 1:46 PM CDT	Special Weather Statement	TSA	McIntosh, Muskogee	44 min
Aug 12, 2:08 PM CDT	Special Weather Statement	TSA	Pittsburg	37 min
Aug 12, 2:22 PM CDT	Special Weather Statement	TSA	Pittsburg	38 min
Aug 12, 2:25 PM CDT	Special Weather Statement	TSA	Pushmataha	35 min
Aug 12, 2:39 PM CDT	Special Weather Statement	TSA	Haskell	36 min
Aug 12, 3:08 PM CDT	Special Weather Statement	TSA	Latimer, LeFlore, Pittsburg	22 min
Aug 12, 3:17 PM CDT	Areal Flood Advisory	TSA	Pushmataha	3 hr
Aug 12, 3:29 PM CDT	Special Weather Statement	TSA	Pushmataha	31 min
Aug 12, 3:36 PM CDT	Special Weather Statement	TSA	LeFlore	24 min
Aug 12, 3:37 PM CDT	Special Weather Statement	TSA	LeFlore	23 min
Aug 12, 4:07 PM CDT	Special Weather Statement	TSA	Pushmataha	38 min
Aug 12, 4:12 PM CDT	Special Weather Statement	TSA	LeFlore	33 min
Aug 12, 5:00 PM CDT	Special Weather Statement	TSA	Pushmataha	45 min
Aug 12, 12:43 PM CDT	Special Weather Statement	TSA	Madison	32 min
Aug 12, 1:26 PM CDT	Special Weather Statement	TSA	Madison	34 min
Aug 12, 1:31 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Madison	29 min
Aug 12, 1:40 PM CDT	Special Weather Statement	TSA	Madison	35 min
Aug 12, 1:52 PM CDT	Special Weather Statement	TSA	Crawford	23 min
Aug 12, 2:28 PM CDT	Special Weather Statement	TSA	Franklin	32 min
Aug 12, 2:35 PM CDT	Special Weather Statement	TSA	Sebastian	25 min

Nearby

Special Weather Statements in Arkansas, 2013 Every special weather statement in 2013

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.