Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 308, NWS Norman, OK

May 10, 2003Johnston County, Marshall County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 10, 2003, 3:12 PM CDT for Johnston County, Marshall County, Oklahoma. It was in force for 48 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 10, 2003, 3:12 PM CDT (20:12 UTC)
Expired: May 10, 2003, 4:00 PM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

Counties Johnston County, OK, Marshall County, OK

The radar

The Norman radar (KTLX), 130 km from the middle of the area, began a volume at 20:14 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 10, 11:55 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.2 hours before the alert went out and 124 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: 3689 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 304 m²/s²
0-3 km storm-relative helicity: 309 m²/s²
Significant tornado parameter: 5.7
Supercell composite: 23.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOUN 102012
SVROKC
OKC069-095-102100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
312 PM CDT SAT MAY 10 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JOHNSTON COUNTY IN SOUTHEAST OKLAHOMA
  NORTHERN MARSHALL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 400 PM CDT

* AT 312 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 6   
MILES SOUTHWEST OF MANNSVILLE...MOVING EAST NORTHEAST AT 40 MPH.

* LOCATIONS IN THE WARNING INCLUDE FILLMORE...LITTLE CITY...MADILL...
  MANNSVILLE...MILBURN...MILL CREEK...OAKLAND...RAVIA...REAGAN...
  RUSSETT...TISHOMINGO AND WAPANUCKA

HAIL UP TO THE SIZE OF GOLFBALLS AND WINDS TO 60 MPH ARE LIKELY WITH 
THIS SEVERE THUNDERSTORM.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

LAT...LON 3439 9687 3402 9697 3405 9656 3440 9641

$$

24

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 May 10, 11:15 AM CDT, 3 hours 57 minutes earlier.

Area forecast discussion, May 10, 11:15 AM CDT, 3 hours 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1115 AM CDT SAT MAY 10 2003

AS OF 1045 AM..DRYLINE EXTENDS FROM NEAR BLACKWELL SWWD TO THE
WESTERN SECTIONS OF THE OKC METRO..TO WICHITA FALLS.  GOOD EWD PUSH
ON THE DRYLINE TODAY AS SURFACE LOW BOMBS OUT DURING THE NEXT 12-18
HRS OVR THE UPPER MIDWEST. ELEVATED ECHOES PERSIST ATOP THE DEEP
MOISTURE..BUT AS OF YET NONE HAVE ROOTED IN THE BOUNDARY LAYER.

THIS SHUD CHANGE RAPIDLY BETWEEN 17-20Z.  ANALYSIS OF 12Z SOUNDINGS
INDICATES THAT AIRMASS WITH UP TO 6000 SURFACE BASED CAPE WILL
BECOME MINIMALLY CAPPED ALONG AND EAST OF THE DRYLINE BY EARLY
AFTERNOON. DRYLINE SHUD ORIENT ALONG A LINE ROUGHLY FROM
STILLWATER..TO JUST EAST OF OKC..TO NEAR WAURIKA BY INITIATION TIME.
DEEP LAYER SHEAR AOA 50KTS WILL BE MORE THAN SUPPORTIVE OF
SUPERCELLS..AND COMBINATION OF LOW LCL HGHTS/0-1 KM SHEAR AOA 25 KTS
AND RICH MOISTURE WILL ONCE AGAIN LEAD TO THE POTENTIAL FOR TORNADIC
SUPERCELLS ANYWHERE STORMS CAN SUSTAIN THIS AFTERNOON AND EARLY
EVENING OVR THE SE ZONES. MESOLOW FORECAST TO DEVELOP OVR NCENT TEX
WILL ALSO ACT TO LOCALLY ENHANCE LOW LEVEL SHEAR IN THIS AREA.

HAVE ALREADY UPDATED THE ZFP AND GRIDS..AND WILL UPDATE LOCAL HWO TO
UPGRADE SVR RISK ASAP.
 MILLER

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

**************************

415 AM CDT SAT MAY 10 2003

DRY LINE WHICH MIGRATED WWD THROUGH MUCH OF THE EVENING IS NOW
BEGINNING TO PUSH EWD AGAIN THIS MORNING AS SFC LOW BEGINS TO MOVE
EASTWARD IN WRN KS. AS UPR TROF OVER THE ROCKIES LIFTS NEWD TODAY
SFC LOW WILL MOVE EWD WITH DRYLINE EXPECTED TO PUSH INTO CNTRL OK BY
MIDDAY. VERY UNSTABLE AMS WILL BE IN PLACE AGAIN TODAY EAST OF THE
DRY LINE WITH DEPOINTS IN THE LOWER 70S. CONVERGENCE ALONG THE DRY
LINE ALONG WITH LARGE SCALE LIFT FROM APCHG UPR TROUGH EXPECTED TO
WEAKEN CAP SUFFICIENTLY FOR TSTM DVLPMNT BY MID AFTN. ACTIVITY SHUD
MOVE INTO ERN SECS OF THE FA BY EVENING AS DRYLINE/FNT CONTINUES TO
PUNCH EWD. A WELCOME BREAK FROM ACTIVE SEVERE WX PATTERN EXPECTED
SUNDAY INTO MONDAY AS DRIER AIR PUSHES IN AND SFC RDGE SETTLES OVER
THE AREA.  NEXT S/W APCHG FROM THE ROCKIES ON TUESDAY WILL BRING
BACK TSTM CHANCES. NOT MUCH CHANGE TO LATTER PORTIONS OF THE
EXTENDED.

FCSTID =    2
OKC   84  51  74  49 /  20  10   0   0
HBR   83  47  75  50 /   0  10   0  10
SPS   88  53  79  52 /  20  10  10  10
GAG   75  41  72  43 /   0  10   0  10
PNC   83  47  72  47 /  30  10   0   0
DUA   88  57  80  53 /  30  30  10  10

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

Hazardous weather outlook, May 10, 12:00 PM CDT, 3 hours 12 minutes before

OKZ004>048-050>052-TXZ083>090-111200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1200 PM CDT SAT MAY 10 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 ACROSS PORTIONS
OF CENTRAL...SOUTH CENTRAL AND SOUTHEASTERN OKLAHOMA AND WESTERN
NORTH TEXAS.

LOCATION...
THE MODERATE RISK AREA IS EAST OF A LINE FROM STILLWATER...TO
PURCELL... TO WAURIKA... TO HENRIETTA TEXAS.

TIMING...
SEVERE THUNDERSTORMS ARE IN PROGRESS ALONG THE WESTERN EDGE OF THE
MODERATE RISK AREA AT MIDDAY... AND THE SEVERE WEATHER THREAT WILL
LAST THROUGH AT LEAST MID EVENING ACROSS THE RISK AREA.

IMPACTS...
ANY SUPERCELL STORMS WILL BE CAPABLE OF PRODUCING TORNADOES...
DESTRUCTIVE HAIL TO THE SIZE OF BASEBALLS OR LARGER... AND NON
TORNADIC WIND GUSTS IN EXCESS OF 80 MPH.  SIGNIFICANT STRUCTURAL
DAMAGE WILL BE POSSIBLE WITH THE STRONGEST STORMS. THE GREATEST RISK
OF TORNADOES WILL BE OVER SOUTH CENTRAL AND SOUTHEAST OKLAHOMA.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD BE PREPARED FOR IMMINENT SEVERE WEATHER OPERATIONS
THIS AFTERNOON AND EVENING.

DISCUSSION...
INCREASING CONVERGENCE ALONG THE DRYLINE AND A RAPIDLY WEAKENING CAP
HAVE RESULTED IN RAPID SURFACE BASED THUNDERSTORM DEVELOPMENT ALONG
THE WESTERN EDGE OF THE MODERATE RISK AREA AT MIDDAY. THE DRYLINE
WILL CONTINUE TO MOVE EAST AT 30 MPH THROUGH THE EARLY AFTERNOON.
CAPE VALUES IN EXCESS OF 4000 AND DEEP LAYER SHEAR VALUES OF 50
KNOTS WILL BE MORE THAN SUFFICIENT FOR A FEW STORMS TO BECOME
SUPERCELLS. THE GREATEST RISK FOR TORNADIC SUPERCELLS THIS AFTERNOON
AND EVENING WILL BE FROM EAST OF THE OKLAHOMA CITY METRO AREA...
SOUTHWARD INTO SOUTH CENTRAL AND SOUTHEAST OKALHOMA... WHERE THE
LOWEST CLOUD BASE HEIGHTS AND STRONGEST SHEAR IN THE LOWEST 3OOO
FEET OF THE ATMOSPHERE WILL EXIST.  THE DRYLINE SHOULD MOVE EAST OF
THE ATOKA AND DURANT AREAS BETWEEN 9 PM AND MIDNIGHT... WHICH SHOULD
BRING THE SEVERE WEATHER THREAT TO AN END.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY MAY 11.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.
PROBABILITY OF A TORNADO IF A SUPERCELL OCCURS...30 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS ARE POSSIBLE EACH DAY FROM MONDAY THROUGH WEDNESDAY
AND THEN AGAIN ON FRIDAY. THE DAYS WITH THE GREATEST RISK OF SEVERE
STORMS WILL BE NEXT TUESDAY AND WEDNESDAY ACROSS THE ENTIRE AREA.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
TOMORROW.

GRAPHICAL OUTLOOKS ARE AVAILABLE ON THE WEB AT
HTTP://WWW.SRH.NOAA.GOV/OUN

 MILLER

In the hours before

Local storm report, May 10, 2:18 PM CDT, 54 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
218 PM CDT SAT MAY 10 2003

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

0203 PM    2 ENE GRADY               OK   .75 INCH HAIL
05/10/03   JEFFERSON                      REPORTED BY THE PUBLIC

0216 PM    WILSON                    OK   .75 INCH HAIL
05/10/03   CARTER                         REPORTED BY THE PUBLIC

SBS

Local storm report, May 10, 2:23 PM CDT, 49 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
223 PM CDT SAT MAY 10 2003

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

0140 PM    HOLDENVILLE               OK   1.75 INCH HAIL
05/10/03   HUGHES                         SPOTTER REPORT

FM

Special weather statement, May 10, 2:33 PM CDT, 39 minutes before

OKZ043-047-051-101950-

SIGNIFICANT WEATHER ADVISORY
NATIONAL WEATHER SERVICE NORMAN OK
233 PM CDT SAT MAY 10 2003

THIS SIGNIFICANT WEATHER ADVISORY IS FOR COAL...JOHNSTON AND MARSHALL
COUNTIES.

A LINE OF SEVERE THUNDERSTORMS WAS LOCATED FROM NEAR SASAKWA...TO
ADA...TO SULPHUR...TO LONE GROVE...TO NEAR COURTNEY AT 230 PM
CDT...MOVING EAST AT 20 MPH. INDIVIDUAL THUNDERSTORMS WERE MOVING
NORTHEAST AT 45 TO 50 MPH. THESE THUNDERSTORMS ARE LIKELY TO REMAIN
SEVERE...AND IN FACT COULD INTENSIFY FURTHER THROUGH MID AFTERNOON
WITH AN INCREASING POTENTIAL FOR VERY LARGE HAIL AND TORNADOES.

PEOPLE IN COAL...JOHNSTON AND MARSHALL COUNTIES SHOULD MONITOR THESE
STORMS CLOSELY. LISTEN FOR WARNINGS AND WATCH FOR THREATENING WEATHER
CONDITIONS AS THE STORMS APPROACH.

24

Local storm report, May 10, 2:48 PM CDT, 24 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
248 PM CDT SAT MAY 10 2003

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

0240 PM    4 N ATWOOD                OK   1.25 INCH HAIL
05/10/03   HUGHES                         SPOTTER REPORT

SBS

Local storm report, May 10, 2:58 PM CDT, 14 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
258 PM CDT SAT MAY 10 2003

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

0250 PM    HICKORY                   OK   .88 INCH HAIL
05/10/03   MURRAY                         REPORTED BY THE PUBLIC

0258 PM    OVERBROOK                 OK   1.00 INCH HAIL
05/10/03   LOVE                           REPORTED BY MURRAY CO EOC

SBS

Local storm report, May 10, 3:04 PM CDT, 8 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
304 PM CDT SAT MAY 10 2003

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

0300 PM    7 SE ARDMORE              OK   1.00 INCH HAIL
05/10/03   CARTER                         LAKE MURRAY RANGER STATION

FM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:08 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	37 min
May 9, 7:14 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble	46 min
May 9, 7:19 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	41 min
May 9, 7:31 PM CDT	Severe Thunderstorm Warning	OUN	Washita	44 min
May 9, 7:39 PM CDT	Tornado Warning	OUN	Logan, Noble, Payne	51 min
May 9, 7:41 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	34 min
May 9, 7:57 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	33 min
May 9, 7:59 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	31 min
May 9, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	50 min
May 9, 8:16 PM CDT	Severe Thunderstorm Warning	OUN	Kay	44 min
May 9, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Washita	13 min
May 9, 8:32 PM CDT	Severe Thunderstorm Warning	OUN	Noble	28 min
May 9, 8:34 PM CDT	Severe Thunderstorm Warning	OUN	Custer	41 min
May 9, 8:47 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady	58 min
May 9, 8:55 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	35 min
May 9, 9:09 PM CDT	Tornado Warning	OUN	Caddo	21 min
May 9, 9:16 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer	44 min
May 9, 9:18 PM CDT	Tornado Warning	OUN	Canadian, Grady	27 min
May 9, 9:27 PM CDT	Tornado Warning	OUN	Blaine, Custer	33 min
May 9, 9:44 PM CDT	Tornado Warning Emergency	OUN	Canadian, Oklahoma	46 min
May 9, 9:58 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	37 min
May 9, 10:07 PM CDT	Severe Thunderstorm Warning	OUN	Logan	38 min
May 9, 10:27 PM CDT	Tornado Warning Emergency	OUN	Oklahoma	48 min
May 9, 10:32 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher	43 min
May 9, 10:35 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan	55 min
May 9, 10:52 PM CDT	Tornado Warning	OUN	Lincoln	53 min
May 9, 10:55 PM CDT	Severe Thunderstorm Warning	OUN	Payne	50 min
May 9, 11:12 PM CDT	Tornado Warning	OUN	Oklahoma	43 min
May 9, 11:41 PM CDT	Tornado Warning	OUN	Lincoln	49 min
May 10, 12:20 AM CDT	Tornado Warning	OUN	Lincoln	25 min
May 10, 11:41 AM CDT	Severe Thunderstorm Warning	OUN	Stephens	49 min
May 10, 11:57 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland	48 min
May 10, 11:58 AM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain	47 min
May 10, 12:00 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Oklahoma	45 min
May 10, 12:22 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	38 min
May 10, 12:44 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Pontotoc, Pottawatomie, Seminole	46 min
May 10, 1:12 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	63 min
May 10, 1:31 PM CDT	Severe Thunderstorm Warning	OUN	Pontotoc, Seminole	44 min
May 10, 2:01 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Love	44 min
May 10, 2:20 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc	55 min
May 10, 2:23 PM CDT	Severe Thunderstorm Warning	OUN	Murray	52 min
May 10, 2:45 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Love	45 min
May 10, 3:08 PM CDT	Severe Thunderstorm Warning	OUN	Coal	67 min
May 10, 3:14 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc	61 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.