Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 613, NWS Norman, OK

August 10, 2004Logan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 10, 2004, 11:37 PM CDT for Logan 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: Aug 10, 2004, 11:37 PM CDT (04:37 UTC)
Expired: Aug 11, 2004, 12:15 AM CDT
In force: 38 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Logan County, OK

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
Aug 10, 9:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.6 hours before the alert went out and 74 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: 1974 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1562 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 12 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 KOUN 110437
SVROKC
OKC083-110515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1135 PM CDT TUE AUG 10 2004

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LOGAN COUNTY IN CENTRAL OKLAHOMA

* UNTIL 1215 AM CDT

* AT 1135 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED 
  THE LEADING EDGE OF A SEVERE THUNDERSTORM 4 MILES NORTH OF GUTHRIE
   ...MOVING SOUTH AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE CEDAR VALLEY...CIMARRON CITY...
  CRESCENT...GUTHRIE...MERIDIAN AND NAVINA

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 148 AND 165.

HAIL UP TO THE SIZE OF HALF DOLLARS AND WINDS OF 75 MPH ARE LIKELY.

PARTICULARLY DAMAGING WINDS ARE EXPECTED. MOBILE HOMES AND HIGH
PROFILE VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO HIGH WINDS AND MAY BE
OVERTURNED. MOVE TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 3599 9729 3598 9766 3574 9766 3574 9721

$$

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 Aug 10, 10:07 PM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, Aug 10, 10:07 PM CDT, 1 hour 30 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1007 PM CDT TUE AUG 10 2004

STORMS CONT TO DEVELOP ACROSS PORTIONS OF NORTHERN OK. STRONG TO
SEVERE STORMS HAVE RAPIDLY DEVELOPED ACROSS NORTH CENTRAL OKLAHOMA
OVR THE PAST HOUR NEAR THE FRONTAL BNDRY...OUTFLOW BNDRY
INTERSECTION. MEANWHILE...STORMS CONT TO DEVELOP AND MOVE ACROSS
PORTIONS OF EASTERN CO...KANSAS...AND THE TX PANHANDLE. THESE STORMS
WILL EVENTUALLY MOVE ACROSS PORTIONS OF OK AND W N TX LATER
TONIGHT...WITH SOME POSSIBLY BECOMING SEVERE. HEAVY RAINS COULD ALSO
CAUSE LOCALIZED FLOODING. WILL UPDATE POPS TO SHOW CURRENT RADAR
TRENDS. WILL ALSO UPDATE SKY CONDITIONS AND HOURLY GRIDS TO SHOW
CURRENT TRENDS. WILL SEND UPDATE AS SOON AS POSSIBLE.

MAXWELL

258 PM CDT TUE AUG 10 2004

.DISCUSSION...
AFTERNOON THUNDERSTORMS HAVE DEVELOPED AGAIN TODAY OVER SOUTHWEST
OKLAHOMA WHERE THERE HAS BEEN SOME WEAK BUT PERSISTENT CONVERGENCE.
SCATTERED SHOWERS WILL LIKELY CONTINUE IN THE AREA THROUGH MID
EVENING... BUT MAIN SHOW IS EXPECTED TO BE OVERNIGHT. EXPECT A
THUNDERSTORM COMPLEX TO MOVE IN FROM THE NORTHWEST TONIGHT. WITH
BETTER SUPPORT WITH AN UPPER LEVEL SHORTWAVE AND SURFACE BOUNDARY IN
THE VICINITY... WE SHOULD SEE WIDESPREAD SHOWERS AND THUNDERSTORMS
ACROSS AT LEAST THE NORTHWESTERN HALF OF THE AREA OVERNIGHT
SPREADING SOUTHEAST WEDNESDAY MORNING. THERE WILL BE AREAS OF
LOCALLY HEAVY RAIN WHICH WILL BE INCLUDED IN THE WORDING OF THE
PACKAGE... BUT WILL NOT ISSUE A FLASH FLOOD WATCH AT THIS TIME SINCE
MOST AREAS HAVE NOT SEEN SIGNIFICANT RAIN FOR A WHILE AND FLASH
FLOOD GUIDANCE NUMBERS ARE RELATIVELY HIGH. COOLER AIR WILL ALSO
FILTER INTO THE AREA BEHIND THIS SURFACE FRONT AS HAS BEEN
ADVERTISED FOR THE PAST FEW DAYS.

NO SIGNIFICANT CHANGES IN THE EXTENDED EXCEPT TO ADJUST TEMPERATURES
DOWNWARD SLIGHTLY ON SATURDAY/SUNDAY GIVEN THE PROGGED 850 MB
TEMPERATURES THAT DO NOT LOOK LIKE THEY CAN SUPPORT THE MEX GUIDANCE
MAX TEMPERATURES.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  66  80  60  84 /  80  70  10  10
HOBART OK         66  80  59  85 /  80  70  10  20
WICHITA FALLS TX  70  82  61  86 /  50  60  10  10
GAGE OK           61  77  53  84 /  80  40  20  20
PONCA CITY OK     63  79  57  83 /  80  50  10  10
DURANT OK         72  83  63  85 /  40  60  20  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.

&&

26

Hazardous weather outlook, Aug 10, 10:57 PM CDT, 40 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
1057 PM CDT TUE AUG 10 2004

OKZ004>048-050>052-TXZ083>090-111200-

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS NORTHWEST
OKLAHOMA...AND A SLIGHT RISK OF SEVERE STORMS ACROSS THE WESTERN
HALF OF OKLAHOMA.

LOCATION...
THE MODERATE RISK AREA IS WEST OF STATE HIGHWAY 34 AND NORTH OF
STATE HIGHWAY 33. THE SLIGHT RISK AREA IS WEST OF I-35 IN OKLAHOMA.

TIMING...
THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE FROM 10 PM THROUGH 7
AM WEDNESDAY.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREAS SHOULD BE PREPARED FOR SEVERE WEATHER OPERATIONS
TONIGHT.

DISCUSSION...
SCATTERED THUNDERSTORMS HAVE DEVELOPED ACROSS NORTH CENTRAL OKLAHOMA
NEAR A COLD FRONT THAT LIES FROM NORTH CENTRAL OKLAHOMA INTO THE
TEXAS PANHANDLE THIS EVENING. OUTFLOW BOUNDARIES FROM EARLIER STORMS
HAVE ALSO BECOME A FOCUS FOR FURTHER STORM DEVELOPMENT THIS EVENING.

MORE WIDESPREAD COVERAGE OF STRONG AND SEVERE THUNDERSTORMS IS
POSSIBLE OVERNIGHT AS ANOTHER LARGE THUNDERSTORM COMPLEX ACROSS
EASTERN COLORADO AND KANSAS MOVES SOUTHEAST. THIS SHOULD REACH
NORTHWEST OKLAHOMA BETWEEN MIDNIGHT AND 2 AM AND MOVE INTO CENTRAL
AND SOUTHWEST OKLAHOMA A FEW HOURS BEFORE SUNRISE WEDNESDAY.

BECAUSE OF EXPECTED MODERATE INSTABILITY AND STRONG NORTHWEST WINDS
ALOFT OVER THE AREA...THE POTENTIAL WILL EXIST FOR SEVERE
THUNDERSTORMS WITH VERY LARGE HAIL AND DAMAGING WINDS.

VERTICAL WIND SHEAR WILL INCREASE AND LIKELY MAINTAIN SEVERE STORMS
WITHIN THE STORM COMPLEX FOR MUCH OF THE NIGHT. THE PRIMARY SEVERE
WEATHER WILL BE DAMAGING WINDS FROM 60 TO 80 MPH AND VERY LARGE
HAIL. THE TORNADO THREAT IS EXPECTED TO BE LOW. THIS COMPLEX OF
STORMS IS ALSO LIKELY TO PRODUCE LOCALLY HEAVY RAINFALL...2 TO 3
INCHES IN MANY PLACES...WHICH COULD CAUSE LOCALIZED FLOODING OF
LOW-LYING AND POORLY DRAINED AREAS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY AUG 11.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NO OTHER HAZARDOUS WEATHER IS EXPECTED THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS WILL LIKELY LINGER INTO AT LEAST THE FIRST HALF OF THE
DAY ON WEDNESDAY ACROSS PARTS OF WESTERN NORTH TEXAS AND SOUTHERN
AND EASTERN OKLAHOMA. THUNDERSTORM CHANCES WILL RETURN LATE THURSDAY
OR THURSDAY NIGHT...AND CONTINUE INTO THE FIRST PART OF NEXT WEEK.

OTHER HAZARDOUS WEATHER...
NONE.

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

RUFF/MAXWELL

In the hours before

Local storm report, Aug 10, 9:51 PM CDT, 1 hour 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
951 PM CDT TUE AUG 10 2004

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

0950 PM     TSTM WND GST     5 N GARBER              36.51N 97.58W
08/10/2004  70 MPH           GARFIELD           OK   LAW ENFORCEMENT

            WIND SPEED ESTIMATED BY COUNTY SHERIFFS DEPUTY.

&&

KT

Local storm report, Aug 10, 9:56 PM CDT, 1 hour 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
956 PM CDT TUE AUG 10 2004

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

0955 PM     TSTM WND GST     TONKAWA                 36.68N 97.31W
08/10/2004  60 MPH           KAY                OK   PUBLIC

            WIND SPEED ESTIMATED.

&&

KT

Special weather statement, Aug 10, 10:38 PM CDT, 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1038 PM CDT TUE AUG 10 2004

OKZ009-014-110400-
ELLIS OK-ROGER MILLS OK-
1038 PM CDT TUE AUG 10 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR ELLIS AND ROGER MILLS
COUNTIES.

THE LEADING EDGE OF A LINE OF STRONG THUNDERSTORM WAS LOCATED FROM
10 MILES WEST OF ARNETT TO 8 MILES WEST OF DURHAM AT 1038 PM
CDT...MOVING SOUTHEAST AT 20 MPH.

SEVERE WEATHER IS NOT EXPECTED AND NO WARNINGS ARE ANTICIPATED AT
THIS TIME.  HOWEVER...40 MPH WINDS...LIGHTNING...SMALL HAIL AND
BRIEF HEAVY RAINFALL WILL OCCUR WITH THESE STORMS.

THE STORMS WILL EFFECT SOUTHERN ELLIS AND WESTERN ROGER MILLS
COUNTIES THROUGH 1130 PM.

PEOPLE IN ELLIS AND ROGER MILLS COUNTIES SHOULD MONITOR THE WEATHER
SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR
THREATENING WEATHER CONDITIONS.

FOSTER

Local storm report, Aug 10, 10:41 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1041 PM CDT TUE AUG 10 2004

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

1030 PM     HAIL             PONCA CITY              36.71N 97.09W
08/10/2004  1.75 INCH        KAY                OK   EMERGENCY MNGR

            REPORTED IN SOUTHWEST PART OF TOWN.

&&

KT

Local storm report, Aug 10, 10:50 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1050 PM CDT TUE AUG 10 2004

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

1035 PM     TSTM WND GST     2 N COVINGTON           36.34N 97.59W
08/10/2004  60 MPH           GARFIELD           OK   LAW ENFORCEMENT

            WIND SPEED ESTIMATED BY COUNTY SHERIFFS DEPUTY.

&&

KT

Special weather statement, Aug 10, 11:37 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1137 PM CDT TUE AUG 10 2004

OKZ025-110445-
OKLAHOMA OK-
1137 PM CDT TUE AUG 10 2004

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR OKLAHOMA COUNTY.

THE LEADING EDGE OF A LINE OF SEVERE THUNDERSTORMS WAS LOCATED 10
MILES NORTH OF GUTHRIE AT 1137 PM CDT...MOVING SOUTH AT 30 MPH.

AT THE PRESENT SPEED OF MOVEMENT THE STORMS WILL EFFECT EDMOND AND
THE NORTHERN OKLAHOMA CITY AREA SHORTLY AFTER MIDNIGHT.

RESIDENTS SHOULD PREPARE FOR WINDS IN EXCESS OF 70 MPH AND HAIL UP
TO 2 INCHES IN DIAMETER.

PEOPLE IN OKLAHOMA COUNTY SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING
WEATHER CONDITIONS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 8:52 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	38 min
Aug 10, 9:31 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	44 min
Aug 10, 10:14 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kay, Noble	46 min
Aug 10, 10:59 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble	46 min
Aug 10, 11:16 PM CDT	Severe Thunderstorm Warning	OUN	Payne	44 min
Aug 10, 11:51 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	39 min
Aug 11, 12:13 AM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	47 min
Aug 11, 12:35 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland	40 min
Aug 11, 12:58 AM CDT	Severe Thunderstorm Warning	OUN	Oklahoma, Pottawatomie	47 min
Aug 11, 5:21 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady, Stephens	54 min
Aug 11, 5:35 AM CDT	Flash Flood Warning	OUN	Logan, Oklahoma	115 min
Aug 11, 6:12 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Grady, Jefferson, Stephens	63 min
Aug 11, 6:16 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma, Pottawatomie	44 min
Aug 11, 7:20 AM CDT	Flash Flood Warning	OUN	Pottawatomie, Seminole	115 min
Aug 11, 8:17 AM CDT	Flash Flood Warning	OUN	Logan, Oklahoma	103 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.