Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 80, NWS Shreveport, LA

June 28, 2011McCurtain County, Oklahoma

NWS Shreveport, LA issued this tornado warning at Jun 28, 2011, 4:45 PM CDT for McCurtain County, Oklahoma. It was in force for 45 min. 6 reports 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: Jun 28, 2011, 4:45 PM CDT (21:45 UTC)
Expired: Jun 28, 2011, 5:30 PM CDT
In force: 45 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

County McCurtain County, OK

The radar

The Western Arkansas radar (KSRX), 148 km from the middle of the area, began a volume at 21:45 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.

What was reported inside it

Time	Report	Where	Remark
Jun 28, 5:00 PM CDT	TSTM WND DMG	Broken Bow, OK	SEVERAL TREES DOWN IN BROKEN BOW.
Jun 28, 5:00 PM CDT	HAIL 1	1 W Broken Bow, OK	QUARTER SIZE HAIL FELL JUST WEST OF BROKEN BOW.
Jun 28, 5:06 PM CDT	TSTM WND DMG	Holly Creek, OK	POWER LINES DOWNED IN THE HOLLY CREEK COMMUNITY.
Jun 28, 5:15 PM CDT	FUNNEL CLOUD	2 N Idabel, OK	LOWERING OF THE CLOUD BASE RESULTING IN MULTIPLE FUNNEL CLOUDS REPORTED BY STORM SPOTTER JUST NORTH OF IDABEL ALONG HWY. 259.
Jun 28, 5:15 PM CDT	TSTM WND GST 65	2 N Idabel, OK
Jun 28, 5:29 PM CDT	HAIL 1.75	Idabel, OK	GOLF BALL SIZE HAIL FALLING IN IDABEL.

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
Jun 28, 11:51 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.8 hours before the alert went out and 193 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: 1494 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 869 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -47 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

446 
WFUS54 KSHV 282145
TORSHV
OKC089-282230-
/O.NEW.KSHV.TO.W.0080.110628T2145Z-110628T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
445 PM CDT TUE JUN 28 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MCCURTAIN COUNTY IN SOUTHEAST OKLAHOMA...

* UNTIL 530 PM CDT

* AT 444 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES
  NORTHWEST OF BROKEN BOW...MOVING SOUTH AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  IDABEL...BROKEN BOW AND HOLLY CREEK AND OAK HILL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

&&

LAT...LON 3390 9458 3390 9493 3413 9488 3416 9478
TIME...MOT...LOC 2144Z 341DEG 20KT 3410 9482

$$

13

1 follow-up statement

495 
WWUS54 KSHV 282203
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
503 PM CDT TUE JUN 28 2011

OKC089-282230-
/O.CON.KSHV.TO.W.0080.000000T0000Z-110628T2230Z/
MCCURTAIN OK-
503 PM CDT TUE JUN 28 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR MCCURTAIN
COUNTY...

AT 503 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS
LOCATED NEAR OAK HILL...MOVING SOUTH AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO IDABEL
AND HOLLY CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

&&

LAT...LON 3406 9487 3408 9476 3390 9458 3390 9493
TIME...MOT...LOC 2203Z 346DEG 21KT 3398 9480

$$

13

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 28, 3:37 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	53 min
Jun 28, 4:24 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	51 min
Jun 28, 5:14 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	61 min

Nearby

Tornado Warnings in Oklahoma, 2011 Every tornado warning in 2011 Tornadoes 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.