Alert archive / Oklahoma / Tornado Watches in 2004

Tornado Watch 38

March 27, 200417 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Mar 27, 2004, 5:30 PM CST for 17 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 27, 2004, 5:30 PM CST (23:30 UTC)
Expired
Mar 27, 2004, 11:00 PM CST
In force
6 hr
Issued by
the Storm Prediction Center

Counties Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Custer County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Noble County, OK, Washita County, OK

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 27, 5:57 PM CSTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods, Woodward48 min
Mar 27, 5:58 PM CSTSevere Thunderstorm WarningOUNGarfield47 min
Mar 27, 6:02 PM CSTSevere Thunderstorm WarningOUNCanadian43 min
Mar 27, 6:19 PM CSTSevere Thunderstorm WarningOUNNoble41 min
Mar 27, 6:29 PM CSTSevere Thunderstorm WarningOUNKingfisher46 min
Mar 27, 6:46 PM CSTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods, Woodward44 min
Mar 27, 6:47 PM CSTSevere Thunderstorm WarningOUNCanadian43 min
Mar 27, 7:13 PM CSTSevere Thunderstorm WarningOUNKingfisher, Logan47 min
Mar 27, 7:29 PM CSTSevere Thunderstorm WarningOUNAlfalfa46 min
Mar 27, 7:54 PM CSTSevere Thunderstorm WarningOUNMajor36 min
Mar 27, 8:04 PM CSTSevere Thunderstorm WarningOUNGarfield, Grant41 min
Mar 27, 8:14 PM CSTSevere Thunderstorm WarningOUNAlfalfa31 min
Mar 27, 8:27 PM CSTSevere Thunderstorm WarningOUNMajor18 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 12:00Z, 11.5 hours before the alert went out and 100 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 12:00Z on 2004-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 44 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 12:00Z on 2004-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 square meters per square second.19395878Sfc1 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
44 J/kg
Mixed-layer CIN
-218 J/kg
Mixed-layer LCL
665 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 272331
SEL8  
SPC WW 272330
OKZ000-280500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 38
NWS STORM PREDICTION CENTER NORMAN OK
530 PM CST SAT MAR 27 2004

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

       WESTERN AND CENTRAL OKLAHOMA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 530 PM UNTIL
1100 PM CST.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 45 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES NORTHWEST OF PONCA CITY OKLAHOMA TO 25
MILES WEST SOUTHWEST OF FORT SILL 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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 36. WATCH NUMBER 36 WILL NOT BE IN EFFECT AFTER 530
PM CST. CONTINUE...WW 37...


DISCUSSION...POTENTIAL FOR TORNADIC SUPERCELLS WILL CONTINUE NEXT
SEVERAL HOURS AHEAD OF DRY LINE NOW FAR WRN OK.  COLD FRONT MOVING
SEWD INTO NWRN OK WILL ALSO RESULT IN INCREASING SEVERE THUNDERSTORM
THREAT AS FRONT OVERTAKES DRY LINE.  FAVORABLE DEEP LAYER SHEAR AND
NARROW ZONE OF MODERATE INSTABILITY E OF DRY LINE SHOULD PERSIST
UNTIL FRONT MOVES ACROSS MUCH OF WRN OK LATER THIS EVENING RESULTING
IN A DECREASE IN SUPERCELL POTENTIAL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 24030.


...HALES

370,0964 342,0980 342,0993 370,0981

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 26, 6:00 PM CSTMesoscale DiscussionSPCBeaver, Cimarron, Texas2 hr
Mar 27, 1:55 AM CSTMesoscale DiscussionSPCCimarron, Texas2 hr
Mar 27, 7:12 AM CSTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 9 more93 min
Mar 27, 9:12 AM CSTMesoscale DiscussionSPCHarper, Woods3 hr
Mar 27, 9:58 AM CSTMesoscale DiscussionSPCBeckham, Ellis, Greer, Harmon, Roger Mills2 hr
Mar 27, 12:07 PM CSTMesoscale DiscussionSPCAlfalfa, Blaine, Canadian, Custer, Dewey, Ellis and 11 more113 min
Mar 27, 12:30 PM CSTTornado WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 17 more6 hr
Mar 27, 1:58 PM CSTMesoscale DiscussionSPCCotton, Tillman2 hr
Mar 27, 2:34 PM CSTMesoscale DiscussionSPCAlfalfa, Blaine, Custer, Dewey, Garfield, Grant and 7 more116 min
Mar 27, 3:53 PM CSTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Haskell, Hughes, McIntosh and 6 more2 hr
Mar 27, 5:08 PM CSTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Comanche, Custer and 14 more37 min

Nearby

Tornado Watches in Oklahoma, 2004Every tornado watch in 2004

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.