Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 92, NWS Tulsa, OK

April 20, 2004Cherokee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 20, 2004, 10:22 PM CDT for Cherokee County, Oklahoma. It was in force for 38 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: Apr 20, 2004, 10:22 PM CDT (03:22 UTC)
Expired: Apr 20, 2004, 11:00 PM CDT
In force: 38 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Cherokee County, OK

The radar

The Tulsa radar (KINX), 65 km from the middle of the area, began a volume at 03:25 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
Apr 20, 7:50 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.4 hours before the alert went out and 163 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: 40 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 176 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 
WUUS54 KTSA 210322
SVRTUL
OKC021-210400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1022 PM CDT TUE APR 20 2004

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 1100 PM CDT

* AT 1022 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5
  MILES SOUTHWEST OF WOODALL...MOVING EAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...WOODALL...
  TAHLEQUAH...COOKSON AND ELDON.

HAIL TO THE SIZE OF PENNIES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED 
IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE 
STORM HAS PASSED.

LAT...LON 3587 9515 3566 9513 3567 9479 3595 9481

$$

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 9:45 PM CDT, 37 minutes earlier.

Area forecast discussion, Apr 20, 9:45 PM CDT, 37 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OKLAHOMA
945 PM CDT TUE APR 20 2004

DISC...
A BUSY AFTERNOON/EVENING. LINE SEVERE THUNDER
CURRENTLY FROM DELAWARE / OKMULGEE / SOUTHERN
EDGE OF CREEK COUNTY. AT ZONE RUN TIME...NEAR
10 PM..WILL TERMINATE TORNADO WATCH NORTHWEST
OF THE LINE.  MAYES / WAGONER ON THE BUBBLE
AT THIS TIME.    SEVERAL MORE HOURS POTENTIAL
SEVERE THUNDER..ARKANSAS /SOUTHEAST OK ZONES.
ATMOSPHERE SLOWLY SETTLES...WHEN UPPER ENERGY
MOVES EAST.  REST FORECAST UNCHANGED.  MORE
EXCITEMENT WEDNESDAY.                      GW

PRELIM NUMBERS:

TUL    58   76   59   75 /  50   30   50   30
FSM    62   75   60   76 /  70   30   50   30
MLC    62   77   62   77 /  50   30   50   30
BVO    55   76   57   73 /  50   30   50   30
FYV    61   72   58   70 /  70   30   50   30
BYV    61   73   56   71 /  70   30   50   30
MKO    61   74   58   74 /  50   30   50   30
MIO    57   76   55   72 /  50   30   50   30
F10    61   76   63   77 /  50   30   50   30
HHW    62   79   65   78 /  60   30   50   30

FORECAST ID= 21

.TSA WATCHES/WARNINGS/ADVISORIES...
AR...NONE.
OK...NONE.

Hazardous weather outlook, Apr 20, 8:30 PM CDT, 1 hour 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
830 PM CDT TUE APR 20 2004

ARZ001-002-010-011-019-020-029-OKZ049-053>076-210600-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
830 PM CDT TUE APR 20 2004

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

...TORNADO WATCH UNTIL 1AM FOR MUCH OF EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS...

THUNDERSTORMS...SOME SEVERE...WILL CONTINUE TO MOVE ACROSS NORTHEAST
OKLAHOMA THROUGH THE REMAINDER OF THE EVENING AND PERSIST INTO
NORTHWEST ARKANSAS INTO THE EARLY NIGHT-TIME HOURS.

CONDITIONS WILL REMAIN FAVORABLE FOR SOME STORMS TO CONTINUE SHOWING
SUPERCELL CHARACTERISTICS.

SPOTTER / EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTERS AND EMERGENCY MANAGERS IN THE TORNADO WATCH AREA SHOULD
REMAIN ACTIVE AND REPORT INFORMATION TO THE NATIONAL WEATHER
SERVICE.  SPOTTERS IN SOUTHEAST OKLAHOMA AND WEST-CENTRAL ARKANSAS
SHOULD CONTINUE TO MONITOR THE PROGRESS OF THESE STORMS IN CASE THEY
DEVELOP FURTHER SOUTH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
AN UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH MUCH OF THE
EXTENDED OUTLOOK PERIOD.  CURRENTLY...THE BEST CHANCES OF
SIGNIFICANT SEVERE WEATHER APPEAR TO BE ON THURSDAY AND/OR FRIDAY.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL TABULAR AND GRAPHICAL
INFORMATION

In the hours before

Local storm report, Apr 20, 7:35 PM CDT, 2 hours 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
735 PM CDT TUE APR 20 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0729 PM     HAIL             RAMONA                  36.53N 95.92W
04/20/2004  1.75 INCH        WASHINGTON         OK   PUBLIC

&&

RDU

Local storm report, Apr 20, 7:43 PM CDT, 2 hours 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
743 PM CDT TUE APR 20 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0736 PM     HAIL             3 SW DEPEW              35.77N 96.54W
04/20/2004  1.75 INCH        CREEK              OK   TRAINED SPOTTER

&&

RDU

Local storm report, Apr 20, 9:01 PM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
901 PM CDT TUE APR 20 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0855 PM     HAIL             BALD HILL               35.74N 95.84W
04/20/2004  1.75 INCH        OKMULGEE           OK   BROADCAST MEDIA

&&

RDU

Special weather statement, Apr 20, 9:07 PM CDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
907 PM CDT TUE APR 20 2004

ARZ001-OKZ063-210300-
BENTON AR-DELAWARE OK-
907 PM CDT TUE APR 20 2004

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1000 PM CDT
FOR THE FOLLOWING COUNTIES:

IN NORTHWEST ARKANSAS
     BENTON

IN NORTHEAST OKLAHOMA
     DELAWARE

AT 907 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 7 MILES NORTHEAST OF GROVE TO 7 MILES WEST OF
LEACH...MOVING EAST AT 25 MPH.

A LARGE PORTION OF BENTON AND DELAWARE COUNTIES WILL BE AFFECTED BY
THESE STORMS THROUGH 1000 PM CDT.

THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ALERT IS UPGRADED TO A WARNING.

Special weather statement, Apr 20, 10:01 PM CDT, 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1001 PM CDT TUE APR 20 2004

ARZ001-010-OKZ068-069-210400-
ADAIR OK-BENTON AR-CHEROKEE OK-WASHINGTON AR-
1001 PM CDT TUE APR 20 2004

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1100 PM CDT
FOR THE FOLLOWING COUNTIES:

IN NORTHWEST ARKANSAS
     BENTON AND WASHINGTON

IN EAST CENTRAL OKLAHOMA
     CHEROKEE

IN NORTHEAST OKLAHOMA
     ADAIR

AT 1001 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 3 MILES SOUTHEAST OF SULPHUR SPRINGS TO 5 MILES
NORTHWEST OF SILOAM SPRINGS TO 5 MILES WEST OF ELDON...MOVING EAST AT
30 MPH.

A LARGE PORTION OF BENTON...WASHINGTON...CHEROKEE AND ADAIR COUNTIES
WILL BE AFFECTED BY THESE STORMS THROUGH 1100 PM CDT.

THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ALERT IS UPGRADED TO A WARNING.

Special weather statement, Apr 20, 10:14 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1014 PM CDT TUE APR 20 2004

OKZ068-210400-
CHEROKEE OK-
1014 PM CDT TUE APR 20 2004

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1100 PM CDT
FOR THE FOLLOWING COUNTY:

IN EAST CENTRAL OKLAHOMA
     CHEROKEE

AT 1014 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 8
MILES SOUTHWEST OF WOODALL...MOVING EAST AT 35 MPH. SOME LOCATIONS
THAT WILL BE AFFECTED BY THIS STORM INCLUDE...WOODALL...TAHLEQUAH...
COOKSON AND ELDON.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
50 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE
SIGNIFICANT WEATHER ALERT IS UPGRADED TO A WARNING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 7:06 PM CDT	Severe Thunderstorm Warning	TSA	Washington	54 min
Apr 20, 7:08 PM CDT	Tornado Warning	TSA	Creek, Tulsa	52 min
Apr 20, 7:10 PM CDT	Severe Thunderstorm Warning	TSA	Creek	65 min
Apr 20, 7:16 PM CDT	Tornado Warning	TSA	Washington	44 min
Apr 20, 7:25 PM CDT	Tornado Warning	TSA	Rogers	50 min
Apr 20, 7:30 PM CDT	Severe Thunderstorm Warning	TSA	Craig	45 min
Apr 20, 7:39 PM CDT	Tornado Warning	TSA	Wagoner	36 min
Apr 20, 7:41 PM CDT	Tornado Warning	TSA	Creek	64 min
Apr 20, 7:43 PM CDT	Severe Thunderstorm Warning	TSA	Osage	47 min
Apr 20, 7:52 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	23 min
Apr 20, 8:03 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	57 min
Apr 20, 8:15 PM CDT	Tornado Warning	TSA	Craig, Ottawa	45 min
Apr 20, 8:19 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers	41 min
Apr 20, 8:25 PM CDT	Tornado Warning	TSA	Wagoner	50 min
Apr 20, 8:28 PM CDT	Tornado Warning	TSA	Okmulgee	47 min
Apr 20, 8:43 PM CDT	Severe Thunderstorm Warning	TSA	Mayes	47 min
Apr 20, 8:44 PM CDT	Severe Thunderstorm Warning	TSA	Creek	46 min
Apr 20, 8:51 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	39 min
Apr 20, 9:02 PM CDT	Tornado Warning	TSA	Muskogee	43 min
Apr 20, 9:08 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	37 min
Apr 20, 9:13 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Wagoner	47 min
Apr 20, 9:21 PM CDT	Tornado Warning	TSA	Okfuskee	24 min
Apr 20, 9:29 PM CDT	Tornado Warning	TSA	Okmulgee	46 min
Apr 20, 9:31 PM CDT	Severe Thunderstorm Warning	TSA	Creek	44 min
Apr 20, 9:41 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	49 min
Apr 20, 9:44 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	46 min
Apr 20, 10:24 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	51 min
Apr 20, 10:52 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee	38 min
Apr 21, 3:18 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	42 min
Apr 21, 3:53 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	67 min
Apr 21, 4:29 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	76 min
Apr 21, 4:41 PM CDT	Tornado Warning	TSA	Sequoyah	64 min
Apr 21, 5:01 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	74 min
Apr 21, 5:08 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee	82 min
Apr 21, 5:24 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	51 min
Apr 21, 5:28 PM CDT	Tornado Warning	TSA	Sequoyah	62 min
Apr 21, 5:56 PM CDT	Severe Thunderstorm Warning	TSA	Creek	79 min
Apr 21, 6:12 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	63 min
Apr 21, 6:16 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	59 min
Apr 21, 6:19 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	56 min
Apr 21, 6:21 PM CDT	Tornado Warning	TSA	Creek	54 min
Apr 21, 6:26 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	64 min
Apr 21, 6:30 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	30 min
Apr 21, 6:33 PM CDT	Tornado Warning	TSA	Tulsa	57 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2004 Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.