Alert archive / Oklahoma / Tornado Warnings in 2009

Tornado Warning 39, NWS Norman, OK

May 13, 20094 counties in Oklahoma

NWS Norman, OK issued this tornado warning at May 13, 2009, 11:29 PM CDT for 4 counties in Oklahoma. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 13, 2009, 11:29 PM CDT (04:29 UTC)
Expired: May 13, 2009, 11:59 PM CDT
In force: 30 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Cleveland County, OK, Garvin County, OK, McClain County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 47 km from the middle of the area, began a volume at 04:29 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.

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, 9:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.5 hours before the alert went out and 46 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: 3795 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1317 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 323 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 17.1

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOUN 140429
TOROUN
OKC027-049-087-125-140515-
/O.NEW.KOUN.TO.W.0039.090514T0429Z-090514T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1129 PM CDT WED MAY 13 2009

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CLEVELAND COUNTY IN CENTRAL OKLAHOMA...
  SOUTHEASTERN MCCLAIN COUNTY IN CENTRAL OKLAHOMA...
  SOUTHWESTERN POTTAWATOMIE COUNTY IN CENTRAL OKLAHOMA...
  EXTREME NORTHEASTERN GARVIN COUNTY IN SOUTHERN OKLAHOMA...

* UNTIL 1215 AM CDT

* AT 1129 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ETOWAH...
  MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE ASHER...BYARS...ETOWAH...
  SOUTHEASTERN NORMAN...TRIBBEY...TROUSDALE AND WANETTE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO MAY FORM AT ANYTIME. TAKE COVER NOW. ABANDON MOBILE HOMES
AND VEHICLES. IF POSSIBLE... MOVE TO A BASEMENT OR STORM SHELTER.
OTHERWISE... MOVE TO AN INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR.
STAY AWAY FROM WINDOWS.

&&

LAT...LON 3499 9679 3493 9688 3496 9692 3490 9693
      3482 9703 3513 9730 3522 9713
TIME...MOT...LOC 0429Z 313DEG 25KT 3511 9719

$$

2 follow-up statements

000 
WWUS54 KOUN 140446
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1146 PM CDT WED MAY 13 2009

OKC027-140456-
/O.CAN.KOUN.TO.W.0039.000000T0000Z-090514T0515Z/
CLEVELAND OK-
1146 PM CDT WED MAY 13 2009

...THE TORNADO WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN CLEVELAND
COUNTY...

LAT...LON 3493 9688 3496 9692 3490 9693 3482 9703
      3506 9715 3516 9705 3513 9698 3499 9679
TIME...MOT...LOC 0446Z 313DEG 25KT 3503 9708

$$

OKC049-087-125-140515-
/O.CON.KOUN.TO.W.0039.000000T0000Z-090514T0515Z/
POTTAWATOMIE OK-MCCLAIN OK-GARVIN OK-
1146 PM CDT WED MAY 13 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR EXTREME
NORTHEASTERN GARVIN...SOUTHEASTERN MCCLAIN AND SOUTHWESTERN
POTTAWATOMIE COUNTIES...

AT 1146 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES NORTHWEST
OF WANETTE...MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE ASHER...BYARS...TRIBBEY...
  TROUSDALE AND WANETTE.

LAT...LON 3493 9688 3496 9692 3490 9693 3482 9703
      3506 9715 3516 9705 3513 9698 3499 9679
TIME...MOT...LOC 0446Z 313DEG 25KT 3503 9708

$$

000 
WWUS54 KOUN 140459
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1159 PM CDT WED MAY 13 2009

OKC049-087-125-140509-
/O.CAN.KOUN.TO.W.0039.000000T0000Z-090514T0515Z/
POTTAWATOMIE OK-MCCLAIN OK-GARVIN OK-
1159 PM CDT WED MAY 13 2009

...THE TORNADO WARNING HAS BEEN CANCELLED FOR NORTHEASTERN GARVIN...
SOUTHEASTERN MCCLAIN AND SOUTHWESTERN POTTAWATOMIE COUNTIES...

THE STORM HAS WEAKENED AND NO LONGER APPEARS TO BE A TORNADO THREAT.

LAT...LON 3493 9688 3496 9692 3490 9693 3482 9703
      3506 9715 3516 9705 3513 9698 3499 9679
TIME...MOT...LOC 0459Z 313DEG 25KT 3497 9700

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 7:02 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Custer, Washita	58 min
May 13, 7:20 PM CDT	Tornado Warning	OUN	Garfield, Noble	40 min
May 13, 7:48 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Lincoln, Logan, Noble, Payne	57 min
May 13, 7:52 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Grady, Kingfisher	53 min
May 13, 8:36 PM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Canadian	3 hr
May 13, 8:41 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma, Payne	64 min
May 13, 8:42 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady, Kiowa, Washita	63 min
May 13, 9:20 PM CDT	Areal Flood Advisory	OUN	Logan	3 hr
May 13, 9:24 PM CDT	Tornado Warning	OUN	Caddo, Grady	31 min
May 13, 9:43 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Logan, McClain, Oklahoma, Pottawatomie and 1 more	62 min
May 13, 9:46 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady, Kiowa	59 min
May 13, 10:07 PM CDT	Flash Flood Warning	OUN	Caddo, Kiowa	6 hr
May 13, 10:07 PM CDT	Tornado Warning	OUN	Cleveland, McClain, Oklahoma	38 min
May 13, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Garvin, Grady, Stephens	61 min
May 13, 10:37 PM CDT	Areal Flood Advisory	OUN	Oklahoma	3 hr
May 13, 10:45 PM CDT	Tornado Warning	OUN	Cleveland, Oklahoma, Pottawatomie	60 min
May 13, 10:56 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady, Kiowa, Washita	64 min
May 13, 11:04 PM CDT	Flash Flood Warning	OUN	Comanche, Grady, Stephens	5 hr
May 13, 11:27 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Comanche, Cotton, Garvin, Grady, Jefferson and 4 more	63 min
May 13, 11:37 PM CDT	Areal Flood Advisory	OUN	Cleveland, Pottawatomie	3 hr
May 13, 11:43 PM CDT	Areal Flood Advisory	OUN	Garvin	3 hr
May 13, 11:52 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Hughes, Johnston, Pontotoc, Seminole	68 min
May 13, 11:58 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	32 min
May 14, 12:15 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa	60 min
May 14, 12:23 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Carter, Comanche, Cotton, Garvin and 8 more	82 min
May 14, 12:25 AM CDT	Areal Flood Advisory	OUN	Carter, Jefferson, Murray	3 hr
May 14, 1:00 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Johnston	60 min
May 14, 1:02 AM CDT	Flash Flood Warning	OUN	Carter, Stephens	4 hr
May 14, 1:17 AM CDT	Areal Flood Advisory	OUN	Atoka, Bryan, Coal, Johnston, Love, Marshall	4 hr
May 14, 1:51 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Love, Murray, Stephens	54 min
May 14, 2:24 AM CDT	River Flood Warning	OUN	Atoka, Bryan	7 hr

Nearby

Tornado Warnings in Oklahoma, 2009 Every tornado warning in 2009 Tornadoes in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.