Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 175, NWS Norman, OK

April 24, 2003Dewey County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 24, 2003, 12:48 AM CDT for Dewey County, Oklahoma. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 24, 2003, 12:48 AM CDT (05:48 UTC)
Expired: Apr 24, 2003, 1:15 AM CDT
In force: 27 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Dewey County, OK

The radar

The Vance AFB radar (KVNX), 115 km from the middle of the area, began a volume at 05:49 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.8 hours before the alert went out and 169 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: 32 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 385 m²/s²
0-3 km storm-relative helicity: 487 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

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 Apr 23, 10:05 PM CDT, 2 hours 43 minutes earlier.

Area forecast discussion, Apr 23, 10:05 PM CDT, 2 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1005 PM CDT WED APR 23 2003

CURRENTLY THE THUNDERSTORMS REMAIN PRIMARILY IN SOUTHEAST OKLAHOMA.
HOWEVER SATELITE SHOWS CLOUDINESS INCREASING IN THE TEXAS PANHANDLE
WITH THE APPROACH OF THE NEXT SHORTWAVE... AND AS THIS FORCING
ENCOUNTERS THE DRYLINE IN THE FAR WESTERN PORTION OF THE AREA WE MAY
SEE REDEVELOPMENT.  500 MB TEMPERATURES WERE AROUND 5 DEGREES COOLER
IN WEST TEXAS COMPARED TO OUN AND FWD AT 00Z SO THERE WILL STILL BE
SOME DECENT INSTABILITY.  AT THIS POINT WILL KEEP RELATIVELY HIGH
POPS FOR RIGHT NOW UNTIL WE SEE WHAT HAPPENS OVER THE NEXT COUPLE OF
HOURS.  .26.

--------------------------
334 PM CDT WED APR 23 2003

COLD FRONT ALOFT ALSO ASSOCIATED WITH SIGNIFICANTLY DRIER AIR THAN
AT LOWER LEVELS WILL CONTINUE TO SURGE EASTWARD AHEAD OF THE
ASSOCIATED LOWER LEVEL FRONT WITH MOST OF THE WIDESPREAD CONVECTION
EXPECTED TO BE EAST OF THE AREA NEAR OR SHORTLY AFTER MIDNIGHT
TONIGHT. LOWER LEVEL DRYLINE AND SURFACE COLD FRONT WILL MOVE
THROUGH THE REMAINDER OF THE AREA LATER TONIGHT AND EARLY THURSDAY
MORNING.

MEANWHILE CUTOFF LOW OVER COLORADO WILL MOVE SLOWLY EASTWARD OVER
THE NEXT 24 TO 48 HRS. STEEPER MID LEVEL LAPSE RATES ASSOCIATED WITH
THIS CIRCULATION MAY RESULT IN SCATTERED SHRA OR TSRA OVER NORTHERN
PORTIONS OF THE FORECAST AREA THURSDAY AND THURSDAY EVENING BEFORE
DIMINISHING.

OUTSIDE OF LOW CLOUDS WRAPPING AROUND THE WEST SIDE OF THE DEPARTING
SURFACE LOW ON FRIDAY...EXPECT A SHORTWAVE RIDGE TO BUILD OVER THE
AREA BY EARLY FRIDAY AND LIKELY REMAINING THE PRIMARY INFLUENCE
THROUGH SUNDAY WITH MILD AND DRY CONDITIONS ANTICIPATED.

MEDIUM RANGE MODELS CONTINUE TO INDICATE INCREASINGLY SOUTHWEST MID
LEVEL FLOW DEVELOPING OVER THE CENTRAL AND SOUTHERN PLAINS BY LATE
SUNDAY THAT PERSISTS INTO THE MIDDLE OF NEXT WEEK. WITH LOWER LEVEL
SOUTHERLY FLOW LIKELY ACCOMPANYING THIS PATTERN...GREATER AMOUNTS
OF LOW LEVEL MOISTURE AND INSTABILITY SHOULD RETURN TO THE AREA WITH
THE DRYLINE AND/OR WEAK FRONTAL BOUNDARIES MOVING TO NEAR OR
POSSIBLY INTO WESTERN OR NW PARTS OF THE AREA PROVIDING A POSSIBLE
SOURCE OF CONVECTIVE INITIATION.

OKC   54  74  49  65 /  80  10  10   0
HBR   50  77  47  68 /  70  10  10   0
SPS   54  83  50  70 /  80  10  10   0
GAG   46  70  44  67 /  20  10  10   0
PNC   55  69  47  61 /  80  30  20   0
DUA   62  83  52  67 /  80  30  10   0

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

Hazardous weather outlook, Apr 23, 11:50 AM CDT, 12 hours 58 minutes before

OKZ004>048-050>052-TXZ083>090-241700-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1150 AM CDT WED APR 23 2003

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING ACROSS PORTIONS OF WESTERN AND SOUTHERN OKLAHOMA...AND
WESTERN NORTH TEXAS. ELSEWHERE...THERE IS A SLIGHT RISK OF SEVERE
THUNDERSTORMS.

LOCATION...
THE MODERATE RISK AREA COVERS LOCATIONS SOUTH AND WEST OF A LINE
EXTENDING FROM ERICK...TO HOBART...TO DUNCAN...TO RINGLING AND
INCLUDING ALL OF WESTERN NORTH TEXAS. SURROUNDING THIS MODERATE RISK
AREA...AND COVERING THE REST OF THE NORMAN NWS COUNTY WARNING
AREA...IS A SLIGHT RISK OF SEVERE THUNDERSTORMS.

TIMING...
THE MOST LIKELY TIME FOR ORGANIZED SEVERE THUNDERSTORMS WILL BE FROM
EARLY AFTERNOON THROUGH LATE EVENING.

IMPACTS...
THE PRIMARY SEVERE WEATHER THREAT WILL BE LARGE HAIL AND DAMAGING
WIND GUSTS. HOWEVER...TORNADOES WILL BE A CONCERN...PRIMARILY OVER
THE MODERATE RISK AREA.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREAS SHOULD PLAN FOR SEVERE WEATHER OPERATIONS FROM THIS
AFTERNOON UNTIL EARLY THURSDAY MORNING.

DISCUSSION...
AREAS OF SHOWERS AND SCATTERED THUNDERSTORMS WILL CONTINUE INTO THE
AFTERNOON HOURS FROM NORTH CENTRAL OKLAHOMA SOUTHWARD INTO CENTRAL
AND SOUTHEAST OKLAHOMA. WITH INSTABILITIES STEADILY INCREASING...
ISOLATED SEVERE STORMS WILL BE POSSIBLE WITH THE STRONGER STORMS
EARLY THIS AFTERNOON...WITH HAIL THE PRIMARY CONCERN. THIS ACTIVITY
WILL CONTINUE TO MOVE OFF TOWARD THE NORTH AND EAST THROUGH THE
REMAINDER OF THIS AFTERNOON.

ADDITIONAL THUNDERSTORMS HAVE DEVELOPED EARLY THIS AFTERNOON ALONG
AND EAST OF A DRY LINE LOCATED ACROSS CENTRAL PORTIONS OF THE TEXAS
PANHANDLE. THIS DRY LINE WILL CONTINUE TO MAKE ITS WAY EAST ACROSS
THE TEXAS PANHANDLE AND WEST TEXAS...AND APPROACH WESTERN OKLAHOMA
AND WESTERN NORTH TEXAS BY MID AFTERNOON. LOW CLOUDS TO THE EAST OF
THE DRY LINE ARE EXPECTED TO GRADUALLY DISSIPATE...ESPECIALLY ACROSS
WESTERN PORTIONS OF NORTH TEXAS AND SOUTHWEST OKLAHOMA THIS
AFTERNOON. THIS WILL ALLOW INSTABILITY TO INCREASE ACROSS THIS AREA
THIS AFTERNOON. ALONG WITH MODERATE AMOUNTS OF INSTABILITY...VERY
STRONG WIND SHEAR WILL SUPPORT SUPERCELL DEVELOPMENT AHEAD OF THE
DRY LINE FROM MID AFTERNOON THROUGH THE EVENING...WITH THE MOST
FAVORED AREA IN THE MODERATE RISK AREA OF SOUTHWEST OKLAHOMA AND
WESTERN NORTH TEXAS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT THURSDAY APR 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...80 PERCENT.

OTHER HAZARDOUS WEATHER...
STRONG WINDS WILL CREATE HAZARDOUS CONDITIONS FOR MUCH OF THE AREA.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THUNDERSTORM OUTLOOK...
THERE WILL CONTINUE TO BE A CHANCE FOR THUNDERSTORMS ACROSS NORTHERN
PORTIONS OF OKLAHOMA ON THURSDAY...AS THE UPPER STORM SYSTEM MOVES
OVER SOUTHERN KANSAS. AFTER THAT...THE NEXT CHANCE FOR THUNDERSTORM
ACTIVITY WILL BE LATE IN THE WEEKEND THROUGH MID WEEK.

OTHER HAZARDOUS WEATHER...
AN ELEVATED FIRE DANGER WILL EXIST ON THURSDAY OVER WESTERN AND
SOUTHERN OKLAHOMA AND ALL OF WESTERN NORTH TEXAS. THIS WILL OCCUR
BEHIND A DRY LINE AND AHEAD OF A COLD FRONT. FIRE DANGERS MAY ALSO
BE HIGH OVER THE WEEKEND...AS TEMPERATURES WARM AND WINDS INCREASE
AGAIN.

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

In the hours before

Special weather statement, Apr 23, 10:18 PM CDT, 2 hours 30 minutes before

OKZ048-240330-

SIGNIFICANT WEATHER ADVISORY
NATIONAL WEATHER SERVICE NORMAN OK
1018 PM CDT WED APR 23 2003

THIS SIGNIFICANT WEATHER ADVISORY IS FOR ATOKA COUNTY.

A SEVERE THUNDERSTORM WAS LOCATED 15 MILES NORTHWEST OF STRINGTOWN AT
1018 PM CDT...MOVING NORTHEAST AT 55 MPH.

WINDS IN EXCESS OF 65 MPH MAY OCCUR WITH THIS STORM.

PEOPLE IN ATOKA COUNTY SHOULD MONITOR THIS STORM CLOSELY. LISTEN FOR
WARNINGS AND WATCH FOR THREATENING WEATHER CONDITIONS AS THIS STORM
APPROACHES.

WR

Local storm report, Apr 23, 10:27 PM CDT, 2 hours 21 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1027 PM CDT WED APR 23 2003

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

0936 PM    11 E WYNNEWOOD            OK   WIND DAMAGE
04/23/03   GARVIN                         SPOTTER REPORTED POWER
                                          POLES SNAPPED.

1025 PM    6 S WETUMKA               OK   1.00 INCH HAIL
04/23/03   HUGHES                         REPORTED BY HUGHES CO
                                          EOC.

TY/KT

Local storm report, Apr 23, 10:45 PM CDT, 2 hours 3 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1045 PM CDT WED APR 23 2003

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

0940 PM    12 E WYNNEWOOD            OK   WIND DAMAGE
04/23/03   GARVIN                         SPOTTER REPORTED SEVERAL
                                          TREES AND POWER LINES
                                          DOWNED. ROOF DAMAGE WAS
                                          ALSO REPORTED.

0950 PM    7 S VANOSS                OK   WIND DAMAGE
04/23/03   PONTOTOC                       PONTOTOC COUNTY EM
                                          REPORTED BARN WAS
                                          DESTROYED.

1002 PM    10 E ADA                  OK   70 MPH WIND GUST
04/23/03   PONTOTOC                       REPORTED BY PONTOTOC COUNTY
                                          EM.

TY/KT

Local storm report, Apr 23, 11:40 PM CDT, 1 hour 8 minutes before

LOCAL STORM REPORT...CORRECTED FOR TIME
NATIONAL WEATHER SERVICE NORMAN OK
1140 PM CDT WED APR 23 2003

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

0940 PM    12 E WYNNEWOOD            OK   WIND DAMAGE
04/23/03   GARVIN                         SPOTTER REPORTED SEVERAL
                                          TREES BLOWN OVER ON
                                          GARVIN AND PONTOTOC
                                          COUNTY LINE. ROOF
                                          DAMAGE WAS ALSO
                                          REPORTED.

TY

Local storm report, Apr 23, 11:40 PM CDT, 1 hour 8 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1140 PM CDT WED APR 23 2003

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

0940 AM    12 E WYNNEWOOD            OK   WIND DAMAGE
04/23/03   GARVIN                         SPOTTER REPORTED SEVERAL
                                          TREES BLOWN OVER ON
                                          GARVIN AND PONTOTOC
                                          COUNTY LINE. ROOF
                                          DAMAGE WAS ALSO
                                          REPORTED.

TY

Special weather statement, Apr 23, 11:54 PM CDT, 54 minutes before

OKZ030>032-040>043-046>048-050>052-240516-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1154 PM CDT WED APR 23 2003

SEVERE THUNDERSTORM WATCH NUMBER 152 HAS BEEN CANCELLED FOR
THE FOLLOWING COUNTIES IN OKLAHOMA

POTTAWATOMIE...SEMINOLE...HUGHES...GARVIN...PONTOTOC...COAL...
MURRAY...CARTER...JOHNSTON...ATOKA...LOVE...MARSHALL...AND BRYAN.

THUNDERSTORMS HAVE MOVED EAST OF THESE COUNTIES AND THE
SEVERE WEATHER THREAT HAS ENDED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 7:06 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	24 min
Apr 23, 7:25 PM CDT	Severe Thunderstorm Warning	OUN	Garvin	50 min
Apr 23, 7:57 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	48 min
Apr 23, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	McClain	30 min
Apr 23, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	48 min
Apr 23, 8:16 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	44 min
Apr 23, 8:27 PM CDT	Tornado Warning	OUN	Jefferson, Stephens	33 min
Apr 23, 8:46 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, McClain, Murray, Pontotoc, Seminole	44 min
Apr 23, 8:53 PM CDT	Tornado Warning	OUN	Carter	27 min
Apr 23, 8:56 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	34 min
Apr 23, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	46 min
Apr 23, 9:08 PM CDT	Tornado Warning	OUN	Murray	37 min
Apr 23, 9:28 PM CDT	Tornado Warning	OUN	Garvin, Pontotoc	32 min
Apr 23, 9:31 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie, Seminole	44 min
Apr 23, 9:33 PM CDT	Severe Thunderstorm Warning	OUN	McClain	42 min
Apr 23, 9:56 PM CDT	Severe Thunderstorm Warning	OUN	Coal	34 min
Apr 23, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	46 min
Apr 23, 10:03 PM CDT	Severe Thunderstorm Warning	OUN	Pontotoc	32 min
Apr 23, 10:32 PM CDT	Severe Thunderstorm Warning	OUN	Coal	28 min
Apr 24, 1:12 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	63 min
Apr 24, 1:13 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	47 min
Apr 24, 2:32 AM CDT	Severe Thunderstorm Warning	OUN	Grant	43 min
Apr 23, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Clay, Wichita	47 min
Apr 23, 8:32 PM CDT	Severe Thunderstorm Warning	OUN	Clay, Wichita	28 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.