Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 620, NWS Norman, OK

June 13, 2003Hughes County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 13, 2003, 8:41 AM CDT for Hughes County, Oklahoma. It was in force for 49 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: Jun 13, 2003, 8:41 AM CDT (13:41 UTC)
Expired: Jun 13, 2003, 9:30 AM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Hughes County, OK

The radar

The Norman radar (KTLX), 92 km from the middle of the area, began a volume at 13:41 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 1.7 hours before the alert went out and 101 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: 490 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 63 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 
WUUS54 KOUN 131341
SVROKC
OKC063-131430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
841 AM CDT FRI JUN 13 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HUGHES COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 930 AM CDT

* AT 841 AM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM OVER
  HOLDENVILLE...MOVING NORTHEAST AT 10 MPH.

* LOCATIONS IN THE WARNING INCLUDE HOLDENVILLE...LAMAR AND YEAGER

HAIL UP TO THE SIZE OF QUARTERS IS LIKELY.

LAT...LON 3520 9645 3499 9644 3501 9608 3527 9607

$$
JAMES

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 13, 4:15 AM CDT, 4 hours 26 minutes earlier.

Area forecast discussion, Jun 13, 4:15 AM CDT, 4 hours 26 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
348 CDT FRI JUN 13 2003

CONVECTION ONGOING THIS MORNING OVER SWRN SECS OF THE FA WHERE MDT
LOW LVL JET INTERACTING WITH SFC BNDRY. EXPECT TSTMS TO GRDLY
DIMINISH LATER THIS MRNG WITH WEAKENING LOW LVL JET. ACTIVE PATTERN
WILL CONTINUE THROUGH TONIGHT AS S/W MOVING INTO NM THIS MORNING
APPROACHES THE SRN PLAINS TONIGHT. MAIN FOCUS AGAIN LOOKS TO BE IN
SWRN SECS OF THE FA WHERE SYN SCALE SFC BNDRY EXPECTED TO BE LOCATED
AS S/W COMES OUT. VERY UNSTABLE AMS WILL BE IN PLACE SOUTH OF THE
BNDRY BY AFTN. HOWEVER...IT WILL BE DIFFICULT TO PINPOINT WHERE SFC
BNDRY WILL BE THIS AFTN AS CURRENT ACTIVITY MAY PUSH EFFECTIVE BNDRY
FARTHER S AND W. AT ANY RATE LOOKS LIKE BEST CHCS FOR TSTMS LATER
TODAY AND TONIGHT WILL BE IN THE SWRN HALF OF THE FA AND WILL TAPER
POPS ACCORDINGLY. S/W GRDLY DROPS SEWD ACROSS THE AREA WITH UPR BLDG
THROUGH THE ROCKIES INTO THE NRN PLAINS. AS A RESULT SLOW MOVING UPR
LOW GRDLY EVOLVES OVER SERN OK BY SUNDAY WITH WEAK SFC RDG PUSHING
INTO THE AREA. PRECIP CHANCES WILL GRDLY DIMINISH ACROSS NRN AND WRN
SECS OF THE FA AS THIS OCCURS. THIS FEATURE GRDLY BEGINS TO WEAKEN
AND MOVE EAST OF THE AREA LATER IN THE WEEK WITH UPR RDG BEGINNING
TO BUILD EWD INTO THE AREA. AS A RESULT WARMER TMPS WITH LOW PRECIP
THREAT EXPECTED BY LATE IN THE WEEK.

OKC   86   67   86   65  / 40   40   30   30
HBR   89   68   86   66  / 60   50   40   30
SPS   90   69   87   68  / 60   70   40   40
GAG   87   63   84   60  / 60   50   40   30
PNC   85   65   86   64  / 20   20   20   20
DUA   89   70   86   68  / 60   50   50   50

FORECAST ID = 02

.OUN...
OK...NONE.
TX...NONE.

Hazardous weather outlook, Jun 13, 6:55 AM CDT, 1 hour 46 minutes before

OKZ004>048-050>052-TXZ083>090-131700-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
655 AM CDT FRI JUN 13 2003

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT
ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE MODERATE RISK AREA IS SOUTH OF A LINE FROM ELK CITY TO NORMAN TO
MADILL.  A SLIGHT RISK AREA COVERS MOST OF THE REST OF OKLAHOMA...
EXCEPT THE AREA NORTH OF A LINE FROM CHEROKEE TO STILLWATER.

TIMING...
A FEW SEVERE STORMS WILL OCCUR EARLY THIS MORNING... BUT SHOULD
DIMINISH THROUGH THE MORNING.  MUCH MORE SIGNIFICANT AND WIDESPREAD
SEVERE WEATHER IS EXPECTED TO DEVELOP DURING THE MID-AFTERNOON...
AND TO CONTINUE UNTIL ABOUT 3 AM.

IMPACTS...
HAIL TO 2 INCHES IN DIAMETER WILL BE LIKELY WITH THE MOST SEVERE
STORMS... ALONG WITH WIND GUSTS TO 70 MPH.  HAIL AND WINDS OF THIS
NATURE CAN CAUSE SIGNIFICANT DAMAGE TO VEHICLES AND PLANTS... AND AT
LEAST MINOR DAMAGE TO BUILDINGS.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS MAINLY FROM
AROUND 3 PM UNTIL 3 AM.

DISCUSSION...
WARM AND MOIST AIR FEEDING INTO A SLIGHTLY ELEVATED BOUNDARY NEAR
THE RED RIVER HAS MAINTAINED STRONG TO SEVERE STORMS INTO THE EARLY
MORNING HOURS TODAY.  AS THE LOW-LEVEL JET WEAKENS THIS MORNING...
AND THE STORMS MOVE INTO MORE STABLE CONDITIONS... THE STORMS ARE
EXPECTED TO WEAKEN.  STRONG DESTABILIZATION IS FORECAST TO OCCUR
THIS AFTERNOON ACROSS SOUTHWEST OKLAHOMA AND MUCH OF WESTERN TEXAS.
A WEAK FRONTAL ZONE IS LIKELY TO LINE UP WITH THE REMNANTS OF
OUTFLOW BOUNDARIES FROM MORNING STORMS.  THIS BOUNDARY WILL PROVIDE
A FOCUS FOR STORM DEVELOPMENT... AND STORMS ARE EXPECTED TO DEVELOP
QUICKLY IN THE VERY UNSTABLE ATMOSPHERE.  WIND SHEAR PROFILES WILL
SUPPORT SUPERCELLS DURING THE AFTERNOON... AND STORM COMPLEXES WITH
STRONG WINDS AND HEAVY RAIN IN THE LATE EVENING AND OVERNIGHT.  THE
STORM COMPLEXES ARE EXPECTED TO MOVE SOUTH OF THE NORMAN FORECAST
AREA BY SUNRISE.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY JUN 14.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
ASIDE FROM THE SEVERE WEATHER DANGER...NO OTHER HAZARDOUS WEATHER IS
EXPECTED THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS WILL BE POSSIBLE THROUGH THE PERIOD.  THERE WILL BE A
POSSIBILITY OF SEVERE STORMS IN NORTH TEXAS ON SATURDAY.
OTHERWISE... THE RISK OF SEVERE STORMS WILL BE LOW THROUGH THURSDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON
TODAY.

CMS

In the hours before

Local storm report, Jun 13, 4:42 AM CDT, 3 hours 59 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
442 AM CDT FRI JUN 13 2003

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0408 AM    6 N FREDERICK             OK   .75 INCH HAIL
06/13/03   TILLMAN                        REPORTED BY SPOTTER.

0417 AM    2 E MANITOU               OK   .75 INCH HAIL
06/13/03   TILLMAN                        SPOTTER REPORT

Local storm report, Jun 13, 5:55 AM CDT, 2 hours 46 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
555 AM CDT FRI JUN 13 2003

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0530 AM    4 SE HOBART               OK   62 MPH WIND GUST
06/13/03   KIOWA                          MEASURED BY OKLAHOMA
                                          MESONET

KT

Special weather statement, Jun 13, 6:39 AM CDT, 2 hours 2 minutes before

OKZ037-038-044-131200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
639 AM CDT FRI JUN 13 2003

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR COMANCHE...COTTON AND
TILLMAN COUNTIES.

STRONG THUNDERSTORMS FROM AROUND FREDERICK TO NEAR APACHE WILL
PRODUCE WINDS OF 40 TO 50 MPH ACROSS MUCH OF COMANCHE...TILLMAN
COUNTIES AND WESTERN PARTS OF COTTON COUNTY AS THEY MOVE NORTHEAST
AT 20 MPH.

SEVERE WEATHER IS NOT EXPECTED AND NO WARNINGS ARE ANTICIPATED AT
THIS TIME.

Special weather statement, Jun 13, 8:35 AM CDT, 6 minutes before

OKZ029-030-131400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
835 AM CDT FRI JUN 13 2003

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR CLEVELAND AND POTTAWATOMIE
COUNTIES.

AN AREA OF STRONG THUNDERSTORMS WAS LOCATED FROM SOUTHWEST
NORMAN...EAST TO TECUMSEH AND WANETTE. THE STORMS WERE MOVING EAST
AT 15 MPH. BRIEF HEAVY RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING
WILL OCCUR.

Special weather statement, Jun 13, 8:40 AM CDT, 1 minute before

OKZ032-131345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
840 AM CDT FRI JUN 13 2003

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR HUGHES COUNTY.

A STRONG THUNDERSTORM WAS LOCATED NEAR HOLDENVILLE AT 840 AM
CDT...MOVING EAST-NORTHEAST AT 15 MPH.

SMALL HAIL...HEAVY RAIN AND WINDS AROUND 40 MPH ARE POSSIBLE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 1:22 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	38 min
Jun 13, 1:59 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	61 min
Jun 13, 3:03 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	57 min
Jun 13, 4:06 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	54 min
Jun 13, 5:07 AM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	38 min
Jun 13, 5:42 AM CDT	Flash Flood Warning	OUN	Kiowa	3 hr
Jun 13, 6:10 AM CDT	Severe Thunderstorm Warning	OUN	Caddo	50 min
Jun 13, 6:29 AM CDT	Severe Thunderstorm Warning	OUN	Grady	46 min
Jun 13, 8:24 AM CDT	Severe Thunderstorm Warning	OUN	Seminole	51 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.