Alert archive / Oklahoma / Tornado Warnings in 2003

Tornado Warning 86, NWS Norman, OK

May 19, 2003Stephens County, Oklahoma

NWS Norman, OK issued this tornado warning at May 19, 2003, 6:35 PM CDT for Stephens County, Oklahoma. It was in force for 25 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 19, 2003, 6:35 PM CDT (23:35 UTC)
Expired: May 19, 2003, 7:00 PM CDT
In force: 25 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Stephens County, OK

The radar

The Altus AFB radar (KFDR), 105 km from the middle of the area, began a volume at 23:37 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 19, 4:05 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Sill, OK (KFSI), launched 12:00Z, 11.6 hours before the alert went out and 57 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: 196 J/kg
Mixed-layer CIN: -776 J/kg
Mixed-layer LCL: 1418 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 330 m²/s²
0-3 km storm-relative helicity: 360 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.

000 
WFUS54 KOUN 192335
TOROKC
OKC137-200000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
633 PM CDT MON MAY 19 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  STEPHENS COUNTY IN SOUTHERN OKLAHOMA

* UNTIL 700 PM CDT

* AT 633 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO 8 MILES EAST OF COMANCHE...MOVING
  SOUTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE COMANCHE...LOCO AND VELMA

TAKE COVER NOW. LEAVE 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 AND OUTSIDE
WALLS.

LAT...LON 3453 9798 3435 9804 3430 9761 3443 9756

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 4:59 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Stephens	46 min
May 19, 5:30 PM CDT	Severe Thunderstorm Warning	OUN	Grady	45 min
May 19, 5:39 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	51 min
May 19, 5:48 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	42 min
May 19, 6:23 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	37 min
May 19, 6:40 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	50 min
May 19, 6:44 PM CDT	Severe Thunderstorm Warning	OUN	Grady, McClain	46 min
May 19, 6:57 PM CDT	Tornado Warning	OUN	Carter, Jefferson, Stephens	33 min

Nearby

Tornado Warnings in Oklahoma, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.