Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 161, NWS Tulsa, OK

July 26, 2012Haskell County, LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 26, 2012, 4:40 PM CDT for Haskell County, LeFlore County, Sequoyah County, Oklahoma. It was in force for 35 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 26, 2012, 4:40 PM CDT (21:40 UTC)
Expired: Jul 26, 2012, 5:15 PM CDT
In force: 35 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), 35 km from the middle of the area, began a volume at 21:43 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
Jul 26, 4:52 PM CDT	TSTM WND DMG	4 S Gans, OK	LARGE TREE LIMBS DOWNED

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, 9.7 hours before the alert went out and 188 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: 854 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

447 
WUUS54 KTSA 262140
SVRTSA
OKC061-079-135-262215-
/O.NEW.KTSA.SV.W.0161.120726T2140Z-120726T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
440 PM CDT THU JUL 26 2012

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 515 PM CDT

* AT 435 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES SOUTHWEST
  OF GANS...MOVING EAST 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...GANS.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 304 AND 316.

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 3545 9464 3526 9464 3529 9489 3546 9484
TIME...MOT...LOC 2141Z 285DEG 13KT 3535 9476

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 3:11 AM CDT	Heat Advisory	TSA	Choctaw, Haskell, Latimer, McIntosh, Muskogee, Okfuskee and 3 more	16 hr
Jul 26, 2:13 PM CDT	Special Weather Statement	TSA	Muskogee	32 min
Jul 26, 2:27 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Wagoner	63 min
Jul 26, 2:31 PM CDT	Severe Thunderstorm Warning	TSA	Adair	59 min
Jul 26, 3:14 PM CDT	Severe Thunderstorm Warning	TSA	Adair	61 min
Jul 26, 3:18 PM CDT	Special Weather Statement	TSA	Muskogee	57 min
Jul 26, 4:19 PM CDT	Special Weather Statement	TSA	Latimer	26 min
Jul 26, 4:22 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	20 min
Jul 26, 4:27 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	63 min
Jul 26, 4:44 PM CDT	Special Weather Statement	TSA	Washington	31 min
Jul 26, 5:08 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pushmataha	67 min
Jul 26, 5:47 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	58 min
Jul 26, 6:15 PM CDT	Special Weather Statement	TSA	Choctaw	60 min
Jul 26, 6:26 PM CDT	Special Weather Statement	TSA	Okfuskee	34 min
Jul 26, 6:28 PM CDT	Special Weather Statement	TSA	Okmulgee	32 min
Jul 26, 6:32 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	58 min
Jul 26, 6:37 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	68 min
Jul 26, 6:45 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	60 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.