Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 191, NWS Tulsa, OK

August 8, 2012Madison County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 8, 2012, 12:44 PM CDT for Madison County, Arkansas. It was in force for 46 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 8, 2012, 12:44 PM CDT (17:44 UTC)
Expired
Aug 8, 2012, 1:30 PM CDT
In force
46 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

County Madison County, AR

The radar

The Western Arkansas radar (KSRX), 101 km from the middle of the area, began a volume at 17:45 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, 5.7 hours before the alert went out and 111 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 12:00Z on 2012-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 145 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 12:00Z on 2012-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 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
145 J/kg
Mixed-layer CIN
-243 J/kg
Mixed-layer LCL
2303 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
-26 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.

435 
WUUS54 KTSA 081744
SVRTSA
ARC087-081830-
/O.NEW.KTSA.SV.W.0191.120808T1744Z-120808T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1244 PM CDT WED AUG 8 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MADISON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 130 PM CDT

* AT 1243 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR JAPTON...
  MOVING SOUTHEAST AT 15 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  AURORA...WITTER...PETTIGREW AND BOSTON.

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 3595 9347 3594 9348 3593 9348 3592 9350
      3588 9350 3587 9352 3582 9351 3576 9352
      3589 9389 3609 9390 3601 9345
TIME...MOT...LOC 1744Z 293DEG 13KT 3596 9378

$$
3 follow-up statements
205 
WWUS54 KTSA 081756
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1256 PM CDT WED AUG 8 2012

ARC087-081830-
/O.CON.KTSA.SV.W.0191.000000T0000Z-120808T1830Z/
MADISON AR-
1256 PM CDT WED AUG 8 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM CDT FOR
SOUTHERN MADISON COUNTY...

AT 1251 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WITTER...AND 
ANOTHER LOCATED NEAR GEORGETOWN MOVING SOUTHEAST AT 10 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 65 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
PETTIGREW...BOSTON...WEATHERS 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.

&&

LAT...LON 3595 9347 3594 9348 3593 9348 3592 9350
      3588 9350 3587 9352 3582 9351 3576 9352
      3589 9389 3609 9390 3601 9345
TIME...MOT...LOC 1756Z 295DEG 27KT 3593 9369

$$
015 
WWUS54 KTSA 081823
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
123 PM CDT WED AUG 8 2012

ARC087-081830-
/O.CON.KTSA.SV.W.0191.000000T0000Z-120808T1830Z/
MADISON AR-
123 PM CDT WED AUG 8 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM CDT FOR
SOUTHERN MADISON COUNTY...

AT 121 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PETTIGREW...
MOVING SOUTHEAST AT 15 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
PETTIGREW...BOSTON...WEATHERS 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.

&&

LAT...LON 3595 9347 3594 9348 3593 9348 3592 9350
      3588 9350 3587 9352 3582 9351 3576 9352
      3589 9389 3609 9390 3601 9345
TIME...MOT...LOC 1823Z 297DEG 27KT 3585 9369

$$
628 
WWUS54 KTSA 081829
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
129 PM CDT WED AUG 8 2012

ARC087-081839-
/O.EXP.KTSA.SV.W.0191.000000T0000Z-120808T1830Z/
MADISON AR-
129 PM CDT WED AUG 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MADISON COUNTY
EXPIRES AT 130 PM CDT...

LAT...LON 3595 9347 3594 9348 3593 9348 3592 9350
      3588 9350 3587 9352 3582 9351 3576 9352
      3589 9389 3609 9390 3601 9345
TIME...MOT...LOC 1829Z 054DEG 83KT 3574 9367

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 10:53 AM CDTSpecial Weather StatementTSABenton37 min
Aug 8, 12:21 PM CDTSpecial Weather StatementTSAWashington39 min
Aug 8, 12:53 PM CDTSevere Thunderstorm WarningTSAWashington52 min
Aug 8, 1:35 PM CDTSpecial Weather StatementTSAFranklin25 min
Aug 8, 2:34 PM CDTSpecial Weather StatementTSASebastian26 min
Aug 8, 2:39 PM CDTSevere Thunderstorm WarningTSAFranklin, Sebastian21 min
Aug 8, 2:55 PM CDTSpecial Weather StatementTSACrawford50 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.