Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 293, NWS Tulsa, OK

May 12, 2011Madison County, Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at May 12, 2011, 7:12 PM CDT for Madison County, Washington County, Arkansas. It was in force for 20 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, 7:12 PM CDT (00:12 UTC)
Expired: May 12, 2011, 7:32 PM CDT
In force: 20 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Madison County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 77 km from the middle of the area, began a volume at 00:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 12, 3:17 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.2 hours before the alert went out and 109 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.

527 
WUUS54 KTSA 130012
SVRTSA
ARC087-143-130115-
/O.NEW.KTSA.SV.W.0293.110513T0012Z-110513T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
712 PM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN MADISON COUNTY IN NORTHWEST ARKANSAS
  EASTERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 815 PM CDT

* AT 709 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES SOUTH OF
  STRICKLER...MOVING NORTHEAST AT 30 MPH.

  STORM HAZARDS INCLUDE...
  DAMAGING GOLF BALL SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  STRICKLER...BLACKBURN...WINSLOW...BRENTWOOD...WEST FORK...
  GREENLAND...FAYETTEVILLE...ELKINS AND WESLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3614 9418 3601 9379 3576 9414 3575 9442
TIME...MOT...LOC 0013Z 218DEG 24KT 3574 9432

$$

1 follow-up statement

744 
WWUS54 KTSA 130032
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
732 PM CDT THU MAY 12 2011

ARC087-143-130042-
/O.CAN.KTSA.SV.W.0293.000000T0000Z-110513T0115Z/
MADISON AR-WASHINGTON AR-
732 PM CDT THU MAY 12 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WASHINGTON AND WESTERN
MADISON COUNTIES IS CANCELLED...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3614 9418 3601 9379 3576 9414 3575 9442
TIME...MOT...LOC 0032Z 224DEG 29KT 3588 9409

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 7:08 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian, Washington	67 min
May 12, 7:15 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	26 min
May 12, 7:26 PM CDT	Areal Flood Advisory	TSA	Crawford, Sebastian	3 hr
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, 8:35 PM CDT	Flash Flood Warning	TSA	Crawford, Sebastian	4 hr
May 12, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	68 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
May 12, 10:32 PM CDT	Special Weather Statement	TSA	Crawford	28 min
May 13, 12:23 AM CDT	Areal Flood Warning	TSA	Crawford, Sebastian	6 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011 Every severe thunderstorm warning 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.