Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 82, NWS Tulsa, OK

May 1, 2012Madison County, Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at May 1, 2012, 4:12 AM CDT for Madison County, Washington County, Arkansas. It was in force for 43 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 1, 2012, 4:12 AM CDT (09:12 UTC)
Expired
May 1, 2012, 4:55 AM CDT
In force
43 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Madison County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 108 km from the middle of the area, began a volume at 09:12 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 watch it was issued in

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

IssuedProductOfficeLasted
May 1, 1:43 AM CDTSevere Thunderstorm WatchSPC3 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 9.2 hours before the alert went out and 90 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2012-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 202 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2012-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
202 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

350 
WUUS54 KTSA 010912
SVRTSA
ARC087-143-011015-
/O.NEW.KTSA.SV.W.0082.120501T0912Z-120501T1015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
412 AM CDT TUE MAY 1 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 515 AM CDT

* AT 407 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 11 MILES NORTHWEST OF ELKINS TO 5 MILES NORTH OF
  BRENTWOOD TO 3 MILES SOUTH OF WINSLOW...MOVING EAST AT 40 MPH.

  STORM HAZARDS INCLUDE...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  ELKINS...WESLEY...HINDSVILLE...JAPTON...CLIFTY...SAINT PAUL...
  HUNTSVILLE...WITTER...AURORA...WITHROW SPRINGS STATE PARK...
  FORUM...PETTIGREW...BOSTON...MARBLE AND KINGSTON.

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.

FREQUENT CLOUD TO GROUND LIGHTNING IS ALSO OCCURRING WITH THIS STORM.
LIGHTNING IS ONE OF NATURES MOST SIGNIFICANT KILLERS. REMAIN INDOORS
AND AWAY FROM WINDOWS. DO NOT USE ELECTRICAL EQUIPMENT OR TAKE A BATH
OR SHOWER DURING A STORM. REMEMBER...IF YOU CAN HEAR THUNDER...YOU
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3597 9345 3587 9352 3576 9351 3578 9419
      3599 9406 3618 9414 3623 9394 3623 9388
      3626 9385 3631 9368 3628 9366 3628 9363
      3616 9359 3615 9355 3612 9355 3612 9348
      3609 9347 3608 9344
TIME...MOT...LOC 0912Z 270DEG 35KT 3611 9409 3593 9403
          3576 9409

$$
2 follow-up statements
495 
WWUS54 KTSA 010943
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
443 AM CDT TUE MAY 1 2012

ARC143-010952-
/O.CAN.KTSA.SV.W.0082.000000T0000Z-120501T1015Z/
WASHINGTON AR-
443 AM CDT TUE MAY 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WASHINGTON COUNTY IS
CANCELLED...

LAT...LON 3597 9345 3587 9352 3576 9351 3578 9388
      3626 9385 3630 9368 3628 9366 3628 9363
      3619 9361 3615 9358 3615 9355 3612 9355
      3612 9348 3609 9347 3608 9344
TIME...MOT...LOC 0942Z 270DEG 35KT 3618 9376 3600 9370
          3579 9380

$$

ARC087-011015-
/O.CON.KTSA.SV.W.0082.000000T0000Z-120501T1015Z/
MADISON AR-
443 AM CDT TUE MAY 1 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT FOR
MADISON COUNTY...

AT 439 AM CDT...ISOLATED SEVERE THUNDERSTORMS WERE LOCATED ALONG A 
LINE EXTENDING FROM CLIFTY TO AURORA TO COMBS...MOVING EAST AT 40 
MPH. 

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...HARMONY...
WITHROW SPRINGS STATE PARK...FORUM...WITTER...ALABAM...ROCKHOUSE...
DUTTON...PETTIGREW...MARBLE...BOSTON...WEATHERS...KINGSTON AND RED
STAR.

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.

FREQUENT CLOUD TO GROUND LIGHTNING IS ALSO OCCURRING WITH THIS STORM.
LIGHTNING IS ONE OF NATURES MOST SIGNIFICANT KILLERS. REMAIN INDOORS
AND AWAY FROM WINDOWS. DO NOT USE ELECTRICAL EQUIPMENT OR TAKE A BATH
OR SHOWER DURING A STORM. REMEMBER...IF YOU CAN HEAR THUNDER...YOU
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3597 9345 3587 9352 3576 9351 3578 9388
      3626 9385 3630 9368 3628 9366 3628 9363
      3619 9361 3615 9358 3615 9355 3612 9355
      3612 9348 3609 9347 3608 9344
TIME...MOT...LOC 0942Z 270DEG 35KT 3618 9376 3600 9370
          3579 9380

$$
700 
WWUS54 KTSA 010955
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
455 AM CDT TUE MAY 1 2012

ARC087-011005-
/O.CAN.KTSA.SV.W.0082.000000T0000Z-120501T1015Z/
MADISON AR-
455 AM CDT TUE MAY 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR MADISON COUNTY IS CANCELLED...

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

GUSTY WINDS...AND VERY HEAVY RAIN WILL STILL BE POSSIBLE WITH THIS 
LINE OF STORMS.

LAT...LON 3597 9345 3587 9352 3576 9351 3578 9388
      3626 9385 3630 9368 3628 9366 3628 9363
      3619 9361 3615 9358 3615 9355 3612 9355
      3612 9348 3609 9347 3608 9344
TIME...MOT...LOC 0955Z 269DEG 34KT 3616 9362 3600 9357
          3579 9367

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 1, 2:56 AM CDTSpecial Weather StatementTSABenton49 min
May 1, 3:28 AM CDTSevere Thunderstorm WarningTSAWashington47 min
May 1, 3:44 AM CDTSpecial Weather StatementTSABenton46 min
May 1, 3:47 AM CDTSpecial Weather StatementTSACrawford43 min
May 1, 4:13 AM CDTSpecial Weather StatementTSACrawford, Franklin, Sebastian62 min
May 1, 4:34 AM CDTSpecial Weather StatementTSACarroll41 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2012Every severe thunderstorm warning 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.