Alert archive / Oklahoma / Tornado Watches in 2003

Tornado Watch 202

May 1, 200315 counties in Arkansas; 17 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at May 1, 2003, 3:45 PM CDT for 15 counties in Arkansas; 17 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 1, 2003, 3:45 PM CDT (20:45 UTC)
Expired
May 1, 2003, 9:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 32 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Howard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Choctaw County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 12 km from the middle of the area, began a volume at 20:45 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 1, 4:21 PM CDTSevere Thunderstorm WarningTSACherokee54 min
May 1, 4:23 PM CDTSevere Thunderstorm WarningTSAMayes37 min
May 1, 4:45 PM CDTSevere Thunderstorm WarningTSADelaware45 min
May 1, 4:53 PM CDTSevere Thunderstorm WarningTSAWagoner37 min
May 1, 5:07 PM CDTSevere Thunderstorm WarningTSACherokee53 min
May 1, 5:25 PM CDTSevere Thunderstorm WarningTSADelaware50 min
May 1, 5:30 PM CDTSevere Thunderstorm WarningTSAWagoner45 min
May 1, 5:31 PM CDTSevere Thunderstorm WarningTSAPushmataha44 min
May 1, 5:55 PM CDTTornado WarningTSACherokee, Muskogee, Wagoner50 min
May 1, 5:57 PM CDTFlash Flood WarningTSACherokee3 hr
May 1, 6:01 PM CDTSevere Thunderstorm WarningTSALeFlore59 min
May 1, 6:12 PM CDTTornado WarningTSAPushmataha48 min
May 1, 6:20 PM CDTSevere Thunderstorm WarningTSASebastian60 min
May 1, 6:29 PM CDTTornado WarningTSASequoyah46 min
May 1, 6:38 PM CDTSevere Thunderstorm WarningTSACrawford67 min
May 1, 6:43 PM CDTSevere Thunderstorm WarningTSACherokee17 min
May 1, 6:50 PM CDTSevere Thunderstorm WarningSHVMcCurtain55 min
May 1, 6:56 PM CDTSevere Thunderstorm WarningTSALeFlore64 min
May 1, 7:01 PM CDTTornado WarningTSASebastian59 min
May 1, 7:06 PM CDTTornado WarningSHVMcCurtain54 min
May 1, 7:08 PM CDTTornado WarningLZKScott57 min
May 1, 7:13 PM CDTTornado WarningTSASequoyah32 min
May 1, 7:20 PM CDTSevere Thunderstorm WarningTSAFranklin55 min
May 1, 7:42 PM CDTSevere Thunderstorm WarningTSACrawford63 min
May 1, 7:42 PM CDTTornado WarningTSALeFlore, Sequoyah33 min
May 1, 7:58 PM CDTTornado WarningSHVMcCurtain62 min
May 1, 8:06 PM CDTTornado WarningLZKPolk, Scott59 min
May 1, 8:16 PM CDTSevere Thunderstorm WarningTSASebastian44 min
May 1, 8:42 PM CDTSevere Thunderstorm WarningSHVSevier63 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

Springfield, MO (KSGF), launched 12:00Z, 8.8 hours before the alert went out and 179 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, Springfield, MO at 12:00Z on 2003-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Springfield, MO at 12:00Z on 2003-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -340 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
816 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-340 m²/s²
0-3 km storm-relative helicity
-135 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 
WWUS20 KWNS 012215
SEL2  
SPC WW 012045
ARZ000-OKZ000-020200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 202 RESENT 1
NWS STORM PREDICTION CENTER NORMAN OK 
345 PM CDT THU MAY 1 2003

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

       WESTERN ARKANSAS
       EASTERN OKLAHOMA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
900 PM 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 70 STATUTE MILES EAST AND WEST
OF A LINE FROM 45 MILES NORTHWEST OF FAYETTEVILLE ARKANSAS TO 65
MILES SOUTH OF PAGE 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 196...WW 197...WW 198...WW
199...WW 200...WW 201...


DISCUSSION...EXTREME INSTABILITY ACROSS ERN OK/SWRN AR WITH MUCAPES
ABOVE 4000 J/KG.  BOUNDARIES ARE EXPECTED TO INITIATE RAPID SEVERE
THUNDERSTORM DEVELOPMENT WITH SUPERCELLS LIKELY.  PRIMARY THREAT
WILL BE VERY LARGE HAIL...BUT GIVEN DEEP SHEAR PROFILES  TORNADOES
ARE POSSIBLE.

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 27020.


...HALES

362,0932 334,0932 334,0954 362,0960

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 1, 7:51 AM CDTMesoscale DiscussionSPCBaxter, Clay, Fulton, Izard, Randolph, Searcy and 1 more114 min
May 1, 9:35 AM CDTSevere Thunderstorm WatchSPCClay, Craighead, Greene5 hr
May 1, 11:23 AM CDTMesoscale DiscussionSPCCrittenden, Cross, Mississippi, St. Francis2 hr
May 1, 2:13 PM CDTMesoscale DiscussionSPCHoward, Little River, Polk, Scott, Sevier3 hr
May 1, 2:55 PM CDTTornado WatchSPCLittle River5 hr
May 1, 6:10 PM CDTMesoscale DiscussionSPCArkansas, Dallas, Hempstead, Jefferson, Lee, Little River and 3 more95 min
May 1, 6:58 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Hempstead, Howard and 10 more92 min
Apr 30, 7:30 PM CDTSevere Thunderstorm WatchSPCGarfield, Grant, Kay, Logan, Noble, Osage and 2 more6 hr
Apr 30, 8:17 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 14 more88 min
Apr 30, 9:52 PM CDTMesoscale DiscussionSPCGarfield, Grant, Kay, Logan, Noble, Osage and 2 more83 min
Apr 30, 11:47 PM CDTMesoscale DiscussionSPCGarfield, Grant, Kay, Logan, Noble, Osage and 2 more118 min
May 1, 12:10 AM CDTSevere Thunderstorm WatchSPCCraig, Garfield, Grant, Kay, Noble, Nowata and 4 more5 hr
May 1, 2:27 AM CDTMesoscale DiscussionSPCCraig, Delaware, Mayes, Nowata, Osage, Ottawa and 2 more2 hr
May 1, 10:55 AM CDTMesoscale DiscussionSPCBryan, Coal, Johnston, Love, Marshall2 hr

Nearby

Tornado Watches in Oklahoma, 2003Tornado Watches in Arkansas, 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.