1 lightning, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, 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 the first event at Aug 20, 8:45 PM CST, 3 hours 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 945 PM CDT SUN AUG 20 2006 .UPDATE... MAIN AREA OF CONVECTION THIS EVENING IS CONFINED TO SOUTHWEST PART OF FA. HAVE GENERALLY LOWERED POPS FOR REST OF TONIGHT ACROSS EASTERN AND CENTRAL SECTIONS WITH LIKELY POPS REMAINING OVER FAR WESTERN COUNTIES. TRENDS DURING THE EVENING HAVE BEEN FOR STORMS TO WEAKENING AS THEY MOVE NORTHEAST OUT OF TEXAS PANHANDLE INTO WEST CENTRAL AND NORTHWEST OKLAHOMA. STILL APPEARS THAT BEST LIFT AND MOISTURE WILL REMAIN ON WESTERN EDGE OF UPPER RIDGE OVERNIGHT. && SIX .PREV DISCUSSION... (ISSUED 254 PM CDT SUN AUG 20 2006) DISCUSSION... DISCUSSION... WEAKLY FORCED REGIME WILL YIELD SOMEWHAT LOW CONFIDENCE...AT LEAST THROUGH THE EARLY PART OF THE WEEK. WEAK SURFACE FRONT EXTENDED FROM SOUTHWEST TO NORTHEAST...FROM PORTIONS OF WESTERN NORTH TEXAS THROUGH SOUTH-CENTRAL INTO EASTERN OKLAHOMA...AND HAS MIXED BACK NORTH A COUNTY OR SO TODAY. AREAS ALONG AND NORTH OF THIS BOUNDARY WILL STAND THE BEST CHANCE FOR SEEING CONVECTION THIS EVENING/NIGHT AND TOMORROW. WEAK CAP AND UPSLOPE FLOW...ALSO AIDED BY SUBTLE WAVE MOVING EAST ACROSS SOUTHERN COLORADO IS EXPECTED TO YIELD WIDESPREAD THUNDERSTORM ACTIVITY ACROSS THE TX/OK PANHANDLES... WHICH SHOULD SPREAD EASTWARD. THIS WILL YIELD HIGHEST POPS ACROSS THE FAR WESTERN/NORTHWESTERN PORTIONS OF OKLAHOMA. KINEMATICS NOT CONDUCIVE FOR SEVERE WEATHER...BUT LOWER LEVEL THERMO PROFILES ADEQUATE FOR WIND THREAT THROUGH MID EVENING...MAINLY NEAR AND JUST NORTH OF THE MENTIONED FRONT. DID MAKE A FEW SIG CHANGES TO MID-LATE WEEK PERIODS WITH REGARD TO TEMPERATURES. ALL MODELS INDICATING FRONTAL INTRUSION MUCH SLOWER THAN PREVIOUS RUNS...WITH THE POSSIBILITY OF ADVERTISED FRONT NOT EVEN MAKING IT INTO THE REGION. ALTHOUGH RIDGE DOES NOT SEEM TO BUILD BACK WITH A VENGEANCE...DEEP LAYER MIXING WILL LEAD TO MID 90S AND EVEN SOME LOWER 100 DEGREE READINGS AHEAD OF SAID FRONT. STRING OF BELOW 100 DEGREE DAYS AT OKC...WHICH STARTED TODAY... COULD COME TO AN END AGAIN BY THURSDAY/FRIDAY OF NEXT WEEK... HOPEFULLY NOT SOONER. && .PRELIMINARY POINT TEMPS/POPS... OKLAHOMA CITY OK 73 89 72 90 / 30 60 40 40 HOBART OK 73 90 72 91 / 60 40 40 30 WICHITA FALLS TX 76 97 75 95 / 40 20 30 20 GAGE OK 67 82 66 88 / 60 60 40 40 PONCA CITY OK 70 85 69 88 / 30 60 40 40 DURANT OK 76 96 75 95 / 30 20 30 20 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...NONE. TX...NONE. &&
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1205 PM CDT SUN AUG 20 2006
OKZ004>048-050>052-TXZ083>090-211200-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1205 PM CDT SUN AUG 20 2006
THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.
.DAY ONE...TODAY AND TONIGHT...
THUNDERSTORM OUTLOOK...
ISOLATED SEVERE STORMS ARE POSSIBLE ACROSS PARTS OF OKLAHOMA AND
NORTH TEXAS.
LOCATION...
AREAS SOUTH OF A LINE FROM ALVA TO STILLWATER.
TIMING...
3 PM TO MIDNIGHT.
IMPACTS..
WINDS TO 65 MPH AND NICKEL SIZE HAIL.
RECOMMENDED ACTIONS...
NONE.
DISCUSSION...
THUNDERSTORMS WILL REDEVELOP DURING THE AFTERNOON NEAR AND NORTH OF
A COLD FRONT THAT HAS STALLED ACROSS WESTERN NORTH TEXAS AND
SOUTHERN OKLAHOMA. ALTHOUGH WIND SHEAR WILL BE WEAK...MODERATE
INSTABILITY SHOULD ALLOW ISOLATED STORMS TO BECOME SEVERE...WITH
WINDS TO 65 MPH...NICKEL-SIZE HAIL...AND HEAVY RAIN THE PRIMARY
HAZARDS. STORMS SHOULD BEGIN TO WEAKEN AFTER SUNSET...AS INSTABILITY
DECREASES.
PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY AUG 21.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...20 PERCENT.
OTHER HAZARDOUS WEATHER...
HEAT INDICES WILL ONCE AGAIN BE IN THE 100 TO 105 DEGREE RANGE THIS
AFTERNOON NEAR AND SOUTH OF THE RED RIVER VALLEY.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...
THUNDERSTORM OUTLOOK...
THUNDERSTORM CHANCES WILL GRADUALLY DIMINISH THROUGH EARLY NEXT WEEK
AS A COLD FRONT WEAKENS OVER THE AREA...WITH ISOLATED SEVERE STORMS
POSSIBLE EACH AFTERNOON AND EVENING.
OTHER HAZARDOUS WEATHER...
TEMPERATURES AND FIRE DANGER WILL INCREASE WEDNESDAY THROUGH FRIDAY.
THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
MONDAY.
CMSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 845 PM CDT SUN AUG 20 2006 OKZ033-036-TXZ083-210215- HARMON OK-JACKSON OK-HARDEMAN TX- 845 PM CDT SUN AUG 20 2006 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR HARDEMAN...HARMON AND JACKSON COUNTIES. A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 7 MILES NORTHWEST OF GOODLETT... TO EL DORADO... TO 10 MILES SOUTHWEST OF ELMER AT 845 PM CDT...MOVING NORTHWEST AT 10 MPH. WIND GUSTS OF 40 TO 50 MPH... SMALL HAIL AND HEAVY RAIN ARE LIKELY WITH THESE STORMS. FREQUENT CLOUD TO GROUND LIGHTNING CAN ALSO BE EXPECTED. CJS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
948 PM CDT SUN AUG 20 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0940 PM TSTM WND GST 5 WSW HOLLIS 34.66N 100.00W
08/20/2006 E60 MPH HARMON OK PUBLIC
&&
FMSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1040 PM CDT SUN AUG 20 2006 TXZ084-210400- FOARD TX- 1040 PM CDT SUN AUG 20 2006 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR FOARD COUNTY. A STRONG THUNDERSTORM WAS LOCATED JUST SOUTHEAST OF CROWELL AT 1040 PM CDT...MOVING NORTHWEST AT 5 MPH. HEAVY RAIN... SMALL HAIL AND WIND GUSTS TO NEAR 45 MPH ARE LIKELY ALONG WITH FREQUENT LIGHTNING. CJS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1150 PM CDT SUN AUG 20 2006 OKZ034-035-210500- KIOWA OK-GREER OK- 1150 PM CDT SUN AUG 20 2006 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR GREER AND KIOWA COUNTIES. A CLUSTER OF STRONG THUNDERSTORMS WAS LOCATED FROM 4 MILES NORTHEAST OF MANGUM TO WILLOW AT 1150 PM CDT...MOVING NORTH AT 10 MPH. VERY HEAVY RAINFALL...FREQUENT LIGHTNING AND WIND GUSTS TO 40 MPH CAN BE EXPECTED WITH THESE STORMS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1227 AM CDT MON AUG 21 2006 OKZ021-022-034-035-210545- BECKHAM OK-WASHITA OK-KIOWA OK-GREER OK- 1227 AM CDT MON AUG 21 2006 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR BECKHAM...GREER...KIOWA AND WASHITA COUNTIES. AT 1227 AM...STRONG THUNDERSTORMS EXTENDED FROM NEAR ELK CITY...SOUTHWARD TO RETROP...AND GRANITE...MOVING NORTHEASTWARD AT 10 MPH. 50 MPH WINDS...HEAVY RAIN...AND FREQUENT LIGHTNING WILL ACCOMPANY THESE STORMS. PEOPLE IN BECKHAM...GREER...KIOWA AND WASHITA COUNTIES...INCLUDING THE CITIES OF ELK CITY AND HOBART...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. JAMES
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1248 AM CDT MON AUG 21 2006 OKZ016-021-022-035-210615- CUSTER OK-BECKHAM OK-WASHITA OK-KIOWA OK- 1248 AM CDT MON AUG 21 2006 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR BECKHAM...CUSTER...KIOWA AND WASHITA COUNTIES. AT 1248 AM...STRONG THUNDERSTORMS EXTENDED FROM FOSS AND ELK CITY...SOUTHWARD TO RETROP...SENTINEL...HOBART...AND LONE WOLF... MOVING NORTHEAST AT 10 MPH. 50 MPH WINDS...NEARLY CONTINUOUS LIGHTNING...AND TORRENTIAL RAIN...WITH 1 TO 2 INCHES POSSIBLE...WILL ACCOMPANY THESE STORMS. PEOPLE IN BECKHAM...CUSTER...KIOWA AND WASHITA COUNTIES...INCLUDING THE CITIES OF ELK CITY AND HOBART...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. JAMES
The Altus AFB radar (KFDR), 103 km away, was scanning. The volume nearest the first event began at 06:10 UTC.
1 lightning. Local standard time, as filed.
Lightning caused some structural damage to a house in Sentinel. A small fire also caused some damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2006Every state in 2006This day in weather historyWarnings in Oklahoma, August 2006
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5529381.