Alert archive / Oklahoma / Tornado Watches in 2003

Tornado Watch 330

May 9, 200318 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at May 9, 2003, 11:10 PM CDT for 18 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2003, 11:10 PM CDT (04:10 UTC)
Expired
May 10, 2003, 5:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Lincoln County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 58 km from the middle of the area, began a volume at 04:12 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.

Warnings issued inside it

12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 9, 11:40 PM CDTTornado WarningTSACreek65 min
May 9, 11:41 PM CDTTornado WarningOUNLincoln49 min
May 9, 11:47 PM CDTSevere Thunderstorm WarningTSACreek, Osage, Pawnee43 min
May 9, 11:54 PM CDTSevere Thunderstorm WarningTSATulsa51 min
May 10, 12:20 AM CDTTornado WarningOUNLincoln25 min
May 10, 12:21 AM CDTTornado WarningTSACreek54 min
May 10, 12:34 AM CDTTornado WarningTSAOkmulgee, Tulsa56 min
May 10, 1:15 AM CDTTornado WarningTSACreek, Okmulgee, Tulsa45 min
May 10, 1:22 AM CDTTornado WarningTSAWagoner68 min
May 10, 2:29 AM CDTSevere Thunderstorm WarningTSAWagoner46 min
May 10, 2:42 AM CDTSevere Thunderstorm WarningTSAMayes48 min
May 10, 2:49 AM CDTSevere Thunderstorm WarningTSACherokee56 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.2 hours before the alert went out and 140 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2823 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2003-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
2823 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1182 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 100403
SEL0  
SPC WW 100410
OKZ000-101000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 330 
NWS STORM PREDICTION CENTER NORMAN OK 
1110 PM CDT FRI MAY 9 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       NORTHEAST OKLAHOMA

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1110 PM
UNTIL 500 AM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES EAST NORTHEAST OF BARTLESVILLE OKLAHOMA TO
60 MILES SOUTH SOUTHWEST OF TULSA OKLAHOMA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.


OTHER WATCH INFORMATION...CONTINUE...WW 327...WW 328...WW 329...


DISCUSSION...TORNADIC SUPERCELL VICINITY OKC EXPECTED TO CONTINUE
INTO NERN OK AS SHEAR PROFILES AND STRONG INSTABILITY REMAINS VERY
FAVORABLE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 24030.


...HALES

365,0941 352,0950 352,0972 365,0963 

WWUS20 KWNS 100403
SEL0  
SPC WW 100410
OKZ000-101000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 330 
NWS STORM PREDICTION CENTER NORMAN OK 
1110 PM CDT FRI MAY 9 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       NORTHEAST OKLAHOMA

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1110 PM
UNTIL 500 AM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES EAST NORTHEAST OF BARTLESVILLE OKLAHOMA TO
60 MILES SOUTH SOUTHWEST OF TULSA OKLAHOMA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.


OTHER WATCH INFORMATION...CONTINUE...WW 327...WW 328...WW 329...


DISCUSSION...TORNADIC SUPERCELL VICINITY OKC EXPECTED TO CONTINUE
INTO NERN OK AS SHEAR PROFILES AND STRONG INSTABILITY REMAINS VERY
FAVORABLE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 24030.


...HALES

365,0941 352,0950 352,0972 365,0963

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 7:12 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 20 more63 min
May 9, 7:45 PM CDTTornado WatchSPCAlfalfa, Beckham, Blaine, Canadian, Custer, Dewey and 9 more5 hr
May 9, 7:47 PM CDTMesoscale DiscussionSPCCraig, Mayes, Nowata, Osage, Ottawa, Pawnee and 2 more88 min
May 9, 8:24 PM CDTMesoscale DiscussionSPCBlaine, Canadian, Custer, Garfield, Kingfisher, Logan and 2 more66 min
May 9, 9:41 PM CDTMesoscale DiscussionSPCBlaine, Canadian, Kingfisher, Logan, Oklahoma64 min
May 9, 10:51 PM CDTMesoscale DiscussionSPCCherokee, Craig, Creek, Delaware, Lincoln, Mayes and 11 more54 min
May 10, 1:22 AM CDTMesoscale DiscussionSPCCherokee, Craig, Creek, Delaware, Lincoln, Mayes and 12 more83 min
May 10, 9:16 AM CDTMesoscale DiscussionSPCCleveland, Craig, Creek, Hughes, Lincoln, McClain and 12 more3 hr
May 10, 10:54 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Creek, Delaware, Mayes and 6 more66 min
May 10, 11:55 AM CDTTornado WatchSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 30 more7 hr
May 10, 1:59 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 29 more2 hr

Nearby

Tornado Watches in Oklahoma, 2003Every tornado watch 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.