Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 310, NWS Tulsa, OK

May 13, 2008Haskell County, LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 13, 2008, 10:17 PM CDT for Haskell County, LeFlore County, Sequoyah County, Oklahoma. It was in force for 43 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: May 13, 2008, 10:17 PM CDT (03:17 UTC)
Expired: May 13, 2008, 11:00 PM CDT
In force: 43 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Haskell County, OK, LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 48 km from the middle of the area, began a volume at 03:20 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

Time	Report	Where	Remark
May 13, 10:40 PM CDT	HAIL 0.75	Keota, OK

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

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 13, 2:03 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.3 hours before the alert went out and 198 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: 635 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 215 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 140317
SVRTSA
OKC061-079-135-140400-
/O.NEW.KTSA.SV.W.0310.080514T0317Z-080514T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1017 PM CDT TUE MAY 13 2008

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 1100 PM CDT

* AT 1016 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL AND WINDS
  TO 60 MPH. THIS STORM WAS LOCATED NEAR STIGLER...MOVING EAST AT 20
  MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...TAMAHA...KEOTA
  AND SALLISAW.

STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3548 9472 3525 9470 3522 9516 3535 9515
TIME...MOT...LOC 0317Z 268DEG 17KT 3530 9510

$$

2 follow-up statements

000 
WWUS54 KTSA 140331
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1031 PM CDT TUE MAY 13 2008

OKC061-079-135-140400-
/O.CON.KTSA.SV.W.0310.000000T0000Z-080514T0400Z/
SEQUOYAH OK-HASKELL OK-LE FLORE OK-
1031 PM CDT TUE MAY 13 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR NORTHERN LE FLORE...NORTHEASTERN HASKELL AND SOUTHERN SEQUOYAH
COUNTIES...

AT 1028 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL AND WINDS TO 60 MPH. THIS STORM WAS LOCATED NEAR KEOTA...MOVING
EAST AT 30 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...SALLISAW AND
COWLINGTON.

STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3529 9470 3528 9471 3525 9470 3523 9503
      3537 9503 3548 9473 3547 9472
TIME...MOT...LOC 0331Z 268DEG 38KT 3531 9491

$$

000 
WWUS54 KTSA 140353
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1053 PM CDT TUE MAY 13 2008

OKC061-079-135-140403-
/O.EXP.KTSA.SV.W.0310.000000T0000Z-080514T0400Z/
SEQUOYAH OK-HASKELL OK-LE FLORE OK-
1053 PM CDT TUE MAY 13 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LE FLORE...
NORTHEASTERN HASKELL AND SOUTHERN SEQUOYAH COUNTIES EXPIRES AT 1100
PM CDT...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 3529 9470 3528 9471 3525 9470 3523 9503
      3537 9503 3548 9473 3547 9472
TIME...MOT...LOC 0353Z 268DEG 38KT 3532 9463

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 7:45 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	60 min
May 13, 8:04 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	56 min
May 13, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	26 min
May 13, 9:06 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	38 min
May 13, 10:09 PM CDT	Special Weather Statement	TSA	Haskell	36 min
May 13, 10:50 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore	55 min
May 13, 11:31 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2008 Every severe thunderstorm warning in 2008

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.