Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 13, NWS Norman, OK

March 12, 2003Hughes County, Pontotoc County, Seminole County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 12, 2003, 11:45 PM CST for Hughes County, Pontotoc County, Seminole County, Oklahoma. It was in force for 60 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: Mar 12, 2003, 11:45 PM CST (05:45 UTC)
Expired: Mar 13, 2003, 12:45 AM CST
In force: 60 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

Counties Hughes County, OK, Pontotoc County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 80 km from the middle of the area, began a volume at 05:45 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 12, 8:55 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.8 hours before the alert went out and 87 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: 2180 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1353 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

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

454 
WUUS54 KOUN 130545
SVROKC
OKC063-123-133-130645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1144 PM CST WED MAR 12 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PONTOTOC COUNTY IN EAST CENTRAL OKLAHOMA
  SEMINOLE COUNTY IN EAST CENTRAL OKLAHOMA
  HUGHES COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1245 AM CST

* AT 1144 PM CST...DOPPLER RADAR DETECTED A LINE OF SEVERE   
THUNDERSTORMS FROM 7 MILES NORTH OF YEAGER...TO SASAKWA...TO 15 
MILES NORTHWEST OF ADA...MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE ADA...ALLEN...BYNG...CALVIN...
  FRANCIS...HOLDENVILLE...LAMAR...SASAKWA...WETUMKA AND YEAGER

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS OVER 60 
MPH. MOBILE HOMES AND HIGH PROFILE VEHICLES ARE ESPECIALLY SUSCEPTIBLE 
TO HIGH WINDS AND MAY BE OVERTURNED. MOVE TO A STURDY BUILDING AND 
STAY AWAY FROM WINDOWS.

HAIL UP THE SIZE OF NICKELS MAY OCCUR...AS WELL.

LAT...LON 3526 9636 3501 9660 3487 9694 3462 9658
          3520 9601

$$

ANDRA

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 8:40 PM CST	Severe Thunderstorm Warning	OUN	Logan	35 min
Mar 12, 8:42 PM CST	Severe Thunderstorm Warning	OUN	Caddo, Washita	48 min
Mar 12, 9:03 PM CST	Severe Thunderstorm Warning	OUN	Lincoln, Oklahoma	42 min
Mar 12, 9:09 PM CST	Severe Thunderstorm Warning	OUN	Canadian	36 min
Mar 12, 9:27 PM CST	Severe Thunderstorm Warning	OUN	Caddo, Grady	63 min
Mar 12, 9:40 PM CST	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Lincoln, Oklahoma, Pottawatomie	50 min
Mar 12, 10:07 PM CST	Severe Thunderstorm Warning	OUN	McClain	23 min
Mar 12, 10:31 PM CST	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma, Pottawatomie	44 min
Mar 12, 10:50 PM CST	Severe Thunderstorm Warning	OUN	Caddo, Grady, McClain	55 min
Mar 12, 10:56 PM CST	Severe Thunderstorm Warning	OUN	Seminole	64 min
Mar 12, 11:07 PM CST	Severe Thunderstorm Warning	OUN	Comanche	38 min
Mar 12, 11:13 PM CST	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie	47 min
Mar 13, 12:08 AM CST	Severe Thunderstorm Warning	OUN	Coal	37 min
Mar 13, 12:38 AM CST	Severe Thunderstorm Warning	OUN	Atoka, Coal, Johnston	37 min
Mar 13, 2:19 AM CST	Severe Thunderstorm Warning	OUN	Bryan, Marshall	41 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2003 Every severe thunderstorm warning 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.