Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS Norman, OK

February 20, 2012Lincoln County, Logan County, Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Feb 20, 2012, 3:52 PM CST for Lincoln County, Logan County, Oklahoma County, Oklahoma. It was in force for 38 min. 3 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: Feb 20, 2012, 3:52 PM CST (21:52 UTC)
Expired: Feb 20, 2012, 4:30 PM CST
In force: 38 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Lincoln County, OK, Logan County, OK, Oklahoma County, OK

The radar

The Norman radar (KTLX), 21 km from the middle of the area, began a volume at 21:53 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
Feb 20, 3:53 PM CST	TSTM WND DMG	3 Se Edmond, OK	LOCAL BROADCAST MEDIA AND NEWSPAPER REPORTED DAMAGE FROM A THUNDERSTORMS OVER SOUTHERN EDMOND. FOUR POWER POLES WERE DOWNED AND FOUR OTHERS DAMAGED AT THE EDMOND HYUNDAI AUTOMOBILE DEALERSHIP. THE DOWNED POLES RESULTED IN AT LEAST 8 VEHICLES BEING DAMAGED.
Feb 20, 3:57 PM CST	TSTM WND DMG	Oklahoma City, OK	LOCAL BROADCAST MEDIA AND NEWSPAPER REPORTED MINOR WIND DAMAGE AT THE DEVON TOWER IN OKLAHOMA CITY. A 5 FOOT BY 10 FOOT PIECE OF GLASS WAS BROKEN ON THE NORTEHAST SIDE OF THE DEVON TOWER WHEN A CRANE WHEN THE WINDS BLEW A CRANE INTO IT.
Feb 20, 4:03 PM CST	HAIL 0.75	3 Ene Oklahoma City, OK	THE HAIL REPORT WAS REPORTED NEAR NE 23RD AND I-35. RELAYED BY KOCO-TV.

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
Feb 20, 2:50 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.9 hours before the alert went out and 34 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 333 m²/s²
0-3 km storm-relative helicity: 436 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.

803 
WUUS54 KOUN 202152
SVROUN
OKC081-083-109-202230-
/O.NEW.KOUN.SV.W.0013.120220T2152Z-120220T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
352 PM CST MON FEB 20 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN LINCOLN COUNTY IN CENTRAL OKLAHOMA...
  SOUTHEASTERN LOGAN COUNTY IN CENTRAL OKLAHOMA...
  OKLAHOMA COUNTY IN CENTRAL OKLAHOMA...

* UNTIL 430 PM CST

* AT 352 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM OVER CENTRAL OKLAHOMA CITY...NEAR DOWNTOWN OKLAHOMA
  CITY...MOVING EAST AT 50 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
WIND GUSTS TO 70 MPH...

* LOCATIONS IN THE WARNING INCLUDE ARCADIA...CHOCTAW...DEL CITY...
  EASTERN EDMOND...EASTERN OKLAHOMA CITY...FOREST PARK...HARRAH...
  JONES...LAKE ALUMA...LUTHER...MIDWEST CITY...NICHOLS HILLS...NICOMA
  PARK...SPENCER...THE VILLAGE...TINKER AIR FORCE BASE...VALLEY
  BROOK...WARR ACRES...WARWICK AND WELLSTON.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 122 AND 144.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 147 AND 160.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 119 AND 164.

LAT...LON 3537 9749 3538 9755 3552 9762 3590 9710
      3557 9682
TIME...MOT...LOC 2152Z 248DEG 42KT 3548 9747

$$


30

1 follow-up statement

037 
WWUS54 KOUN 202210
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
410 PM CST MON FEB 20 2012

OKC081-083-109-202230-
/O.CON.KOUN.SV.W.0013.000000T0000Z-120220T2230Z/
LINCOLN OK-LOGAN OK-OKLAHOMA OK-
410 PM CST MON FEB 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CST
FOR EASTERN OKLAHOMA...SOUTHEASTERN LOGAN AND SOUTHWESTERN LINCOLN
COUNTIES...

AT 410 PM CST...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM OVER NORTHEASTERN OKLAHOMA CITY...3 MILES NORTHEAST OF
JONES...MOVING NORTHEAST AT 55 MPH.

HAZARDS IN THE WARNING INCLUDE...
WIND GUSTS TO 65 MPH...

* LOCATIONS IN THE WARNING INCLUDE ARCADIA...CHOCTAW...EASTERN
  EDMOND...HARRAH...JONES...LUTHER...NICOMA PARK...NORTHEASTERN
  OKLAHOMA CITY...WARWICK AND WELLSTON.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 136 AND 164.

LAT...LON 3544 9730 3561 9744 3590 9710 3557 9682
TIME...MOT...LOC 2210Z 240DEG 48KT 3564 9720

$$


30

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 3:22 AM CST	Red Flag Warning	OUN	Cotton, Harmon, Jackson, Tillman	16 hr
Feb 20, 3:03 PM CST	Special Weather Statement	OUN	Garfield, Grant, Kingfisher	27 min
Feb 20, 3:07 PM CST	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	53 min
Feb 20, 3:12 PM CST	High Wind Warning	OUN	Beckham, Blaine, Caddo, Custer, Dewey, Ellis and 8 more	4 hr
Feb 20, 3:35 PM CST	Special Weather Statement	OUN	Canadian, Grady, Kingfisher, Logan, Oklahoma, Stephens	25 min
Feb 20, 3:56 PM CST	Severe Thunderstorm Warning	OUN	Garfield, Kay, Noble	49 min
Feb 20, 4:03 PM CST	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie, Seminole	42 min
Feb 20, 4:26 PM CST	Severe Thunderstorm Warning	OUN	Lincoln, Payne	31 min
Feb 20, 4:31 PM CST	Special Weather Statement	OUN	Payne	14 min
Feb 20, 4:44 PM CST	Severe Thunderstorm Warning	OUN	Garvin, Hughes, Lincoln, McClain, Pontotoc, Pottawatomie and 1 more	46 min
Feb 20, 5:28 PM CST	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc	37 min
Feb 20, 5:42 PM CST	Special Weather Statement	OUN	Coal	18 min
Feb 20, 5:47 PM CST	Severe Thunderstorm Warning	OUN	Atoka, Coal, Johnston, Pontotoc	35 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.