Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 451, NWS Tulsa, OK

July 13, 2011LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 13, 2011, 1:31 PM CDT for LeFlore County, Sequoyah County, Oklahoma. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 13, 2011, 1:31 PM CDT (18:31 UTC)
Expired
Jul 13, 2011, 2:15 PM CDT
In force
44 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 29 km from the middle of the area, began a volume at 18:31 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.

What was reported inside it

TimeReportWhereRemark
Jul 13, 2:08 PM CDTTSTM WND DMGPocola, OKFEW HOMES WITH ROOF DAMAGE AND A BARN DAMAGED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 6.5 hours before the alert went out and 197 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 2011-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 176 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 2011-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.1939Sfc1 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
176 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1064 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
85 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.

262 
WUUS54 KTSA 131831
SVRTSA
OKC079-135-131915-
/O.NEW.KTSA.SV.W.0451.110713T1831Z-110713T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
131 PM CDT WED JUL 13 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  NORTHEASTERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 215 PM CDT

* AT 131 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES NORTHWEST
  OF PANAMA...MOVING NORTHEAST AT 10 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...SPIRO
  AND POCOLA.

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 3540 9472 3523 9445 3512 9470 3521 9480
TIME...MOT...LOC 1832Z 223DEG 10KT 3522 9472

$$
2 follow-up statements
569 
WWUS54 KTSA 131849
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
149 PM CDT WED JUL 13 2011

OKC079-135-131915-
/O.CON.KTSA.SV.W.0451.000000T0000Z-110713T1915Z/
LE FLORE OK-SEQUOYAH OK-
149 PM CDT WED JUL 13 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CDT FOR
SOUTHERN SEQUOYAH AND NORTHEASTERN LE FLORE COUNTIES...

AT 147 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED NEAR COWLINGTON AND 
SCULLYVILLE...MOVING NORTHEAST AT 15 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
COWLINGTON...SPIRO...SCULLYVILLE AND POCOLA.

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 3540 9472 3523 9445 3512 9470 3521 9480
TIME...MOT...LOC 1849Z 238DEG 11KT 3526 9473 3519 9457

$$
361 
WWUS54 KTSA 131902
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
202 PM CDT WED JUL 13 2011

OKC079-135-131915-
/O.CON.KTSA.SV.W.0451.000000T0000Z-110713T1915Z/
LE FLORE OK-SEQUOYAH OK-
202 PM CDT WED JUL 13 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CDT FOR
SOUTHERN SEQUOYAH AND NORTHEASTERN LE FLORE COUNTIES...

AT 200 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR SCULLYVILLE...
MOVING EAST AT 15 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...POCOLA.

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 3537 9468 3523 9445 3512 9470 3521 9480
TIME...MOT...LOC 1903Z 248DEG 14KT 3524 9453

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:00 PM CDTSpecial Weather StatementTSAMcIntosh60 min
Jul 12, 7:35 PM CDTSpecial Weather StatementTSAMuskogee40 min
Jul 12, 7:37 PM CDTSpecial Weather StatementTSAMcIntosh, Muskogee53 min
Jul 12, 8:02 PM CDTSevere Thunderstorm WarningTSAHaskell, Muskogee, Sequoyah58 min
Jul 12, 8:15 PM CDTSpecial Weather StatementTSACherokee45 min
Jul 12, 8:48 PM CDTSpecial Weather StatementTSASequoyah57 min
Jul 12, 11:22 PM CDTSpecial Weather StatementTSAOsage38 min
Jul 13, 5:24 AM CDTAreal Flood AdvisoryTSAOsage3 hr
Jul 13, 1:28 PM CDTSpecial Weather StatementTSASequoyah47 min
Jul 13, 2:06 PM CDTSevere Thunderstorm WarningTSALeFlore, Sequoyah39 min
Jul 13, 2:55 PM CDTSpecial Weather StatementTSAPittsburg35 min
Jul 13, 3:23 PM CDTSpecial Weather StatementTSAPittsburg37 min
Jul 13, 3:59 PM CDTExcessive Heat WatchTSACherokee, Choctaw, Craig, Creek, Delaware, Haskell and 15 more60 hr
Jul 13, 4:21 PM CDTSpecial Weather StatementTSALeFlore24 min
Jul 13, 4:44 PM CDTSpecial Weather StatementTSAOkfuskee31 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.