Dense fog developed across central and east central Kansas during the early morning hours of September 27. Convection during the evening of the 26th provided sufficient low level moisture for fog development, with dewpoint temperatures overnight hovering in the upper 50s to lower 60s across the region.
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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 episode as NWS TOP wrote it up.
Dense fog developed across central and east central Kansas during the early morning hours of September 27. Convection during the evening of the 26th provided sufficient low level moisture for fog development, with dewpoint temperatures overnight hovering in the upper 50s to lower 60s across the region. High pressure built over Kansas as the convection pushed eastward, which allowed for calm winds through much of the night. Adverse driving conditions reported by local law enforcement officials did not result in any accidents.
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 Topeka, KS wrote its last area forecast discussion before the first event at Sep 26, 2:51 PM CST, 11 hours 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TOPEKA KS 351 PM CDT WED SEP 26 2007 .SHORT TERM... LATEST WATER VAPOR SATELLITE IMAGERY SHOWING ANOTHER UPPER LEVEL WAVE AND ASSOCIATED SFC TROUGH ARE ADVANCING EASTWARD ACROSS NEBRASKA. WITH THE AIR OUT AHEAD OF THE WAVE DRY...NO PRECIP IS ASSOCIATED WITH IT AT 3 PM. ALTHOUGH CONVECTION MAY DEVELOP FURTHER NORTH ALONG THE BOUNDARY...DO NOT EXPECT ANY PRECIP TO BE ASSOCIATED WITH ITS PASSAGE ACROSS THE CWA TONIGHT AS MAIN UPPER LEVEL FORCING REMAINS WELL TO THE NORTH. THE COMBINATION OF THE APPROACHING TROUGH AND RETREATING SFC HIGH TO THE EAST WILL VEER LOW LEVEL WINDS ACROSS THE CWA FROM SOUTHEAST TO THE WEST OVERNIGHT. DEEPER MOISTURE IN THE LOW LEVELS REMAINS POOLED ALONG OLD BOUNDARY TO THE SOUTH OF THE CWA. WILL NEED TO WATCH THE SOUTHERN CWA TONIGHT FOR ANY SIGNS OF THIS MOISTURE TRYING TO TEMPORARILY SURGE NORTHWARD BEFORE BEING PUSHED EAST AGAIN WITH THE VEERING WINDS. FOR NOW...AM LEANING MORE WITH KEEPING IT TO THE SOUTH AS THE LOW LEVEL FLOW VEERS. EXPECT ONLY SOME SCATTERED MID LEVEL CLOUDS OVER CENTRAL KS TO BRUSH THE CWA OVERNIGHT AS THE WAVE PASSES BY. WITH MOSTLY CLEAR SKIES MUCH OF THE NIGHT...DRY AIR AND LIGHT WINDS...SHOULD SEE LOWS FALL INTO THE UPPER 40S ACROSS THE NORTH WITH LOW 50S SOUTH OF I-70. ON THURSDAY...WEST TO NORTHWEST WINDS WINDS EARLY WILL BECOME MORE NORTHERLY LATER IN THE AFTERNOON AS THE CENTER OF THE NEXT SFC HIGH BUILDS SOUTHWARD. ANY CAA WILL PRIMARILY WAIT UNTIL LATER IN THE DAY AND WITH MOSTLY SUNNY SKIES EXPECT HIGHS TO ACTUALLY BE HIGHER THAN TODAY WITH READINGS GENERALLY IN THE LOWER 80S. .LONG TERM... PRIMARY CONCERNS IN THE EXTENDED ARE TIMING/PLACEMENT OF SHORTWAVE THIS WEEKEND AND FROPA WITH ATTENDANT PRECIPITATION CHANCE...THEN A SECOND CHANCE FOR PRECIPITATION FOR TUE/WED. 26/12Z GFS BEGINNING TO SLOW A BIT WITH SPEED OF SHORT WAVE EXPECTED TO DIVE ACROSS THE NORTHERN PLAINS. TRACK OF 500HPA CENTER FOLLOWS ALONG A NE/IA EASTWARD PATH. ECMWF STILL APPEARS TO BE TOO SLOW...WITH AN APPROXIMATELY 12 HOUR FROPA LAG-TIME BEHIND THE 26/12Z GFS. LATEST RUN (26/12Z) OF THE ECMWF DOES LATCH ON TO THE FURTHER NORTH TRACK. PREVIOUS TRACK SLID RIGHT ACROSS NE KS. 26/12Z NAM TIMING OFF- SET FROM GFS SOLUTION AS WELL...BUT APPEARS TO BE TRENDING TOWARD THE MORE NORTHERLY SOLUTION THE GFS EXHIBITS. GENERALLY FAVORED A TREND TOWARD THE MORE CONSISTENT GFS SOLUTION. OVERNIGHT FRIDAY INTO SATURDAY...WAA REGIME MAY HELP TO PRODUCE WIDELY SCATTERED SHOWERS...MAINLY ACROSS NORTH CENTRAL KANSAS. ATTM...DO NOT THINK THE AMOUNT OF POTENTIAL LIFT/MOISTURE WILL BE ENOUGH TO PRODUCE SHOWERS. AS A RESULT...REMOVED POPS ACROSS NORTH CENTRAL KANSAS. BUT...AREA WILL HAVE TO BE MONITORED FOR THE POTENTIAL FOR A FEW LIGHT SHOWERS TO DEVELOP AS DETAILS BECOME MORE APPARENT. DURING THE AFTERNOON HOURS...SHORTWAVE TROUGH TO REMAIN WELL WEST OF THE CWA. WITH LACK OF DISTINCT FOCUSING MECHANISM...AND FAIRLY DRY MIDLEVELS HAVE REMOVED THE SLIGHT CHANCE FOR RAIN SATURDAY AFTERNOON. MAIN SHOW COMES WITH FROPA SATURDAY/EARLY SUNDAY. BUT...BECAUSE OF UNCERTAINTY OF TIMING AND PLACEMENT OF ATTENDANT 500HPA LOW/SFC FRONT...MAY JUST A FEW CHANGES TO CURRENT FORECAST. PRECIPITATION CHANCE WAS INCREASED SLIGHTLY FOR SATURDAY NIGHT...PRIMARILY OUT IN NW KANSAS. MAINTAINED LINGERING SLIGHT CHANCE IN EAST CENTRAL KANSAS SUNDAY AFTERNOON SHOULD A SLOWER TRACK PREVAIL. SEVERE WEATHER THREAT SOMEWHAT DWINDLING AT THIS POINT. MAIN FOCUS AREA FOR CONVECTIVE DEVELOPMENT WILL BE WELL WEST OF THE CWA DURING AFTERNOON HEATING. CHANCE FOR PRECIPITATION ARISES TUESDAY/WEDNESDAY AS A SECOND AND THIRD SHORTWAVE SWINGS ACROSS THE NORTHERN U.S. ROCKIES. EARLY TUES...500HPA WAVE AND NEARLY STACKED ASSOCIATED SFC LOW STAY WELL NORTH OF THE CWA...BUT DOES MANAGE TO DRIVE A FRONT ACROSS THE CENTRAL PLAINS. WITH SOUTHWESTERLY FLOW EXPECTED TO STREAM MOISTURE OFF THE W COAST OF MEXICO...AND SERIES OF WEAK SHORTWAVES EMBEDDED WITHIN THIS FLOW...A FEW SHOWERS OR STORMS ARENT OUT OF THE QUESTION (BUT...26/12Z GFS SEEMS A BIT TOO ROBUST WITH THIS MOISTURE). AS A RESULT OF UNCERTAINTY IN AVAILABLE MOISTURE/LIFT INCLUDED ONLY A SLIGHT RAIN CHANCE ACROSS PRIMARILY FAR EASTERN KANSAS DURING THE MORE FAVORABLE AFTERNOON HOURS. && .AVIATION... EXPECT ONLY A FEW/SCT AC AROUND 8-10KFT TO MOVE ACROSS THE TAF SITES TONIGHT. WILL HAVE TO WATCH TO THE SOUTH IN CASE ANY LOW LEVEL MOISTURE MAKES A BRIEF SURGE NORTH AND NORTHEAST BEFORE SHIFTING MORE EAST IN THE VEERING LOW LEVEL FLOW. IF THIS WERE TO OCCUR...STRATUS AND FOG COULD DEVELOP OVER PORTIONS OF THE EASTCENTRAL AFTER MIDNIGHT AS GOOD COOLING TAKES PLACE IN THE EVENING. ALSO MODELS INDICATING A LOW LEVEL INVERSION MAY TRY TO DEVELOP TONIGHT...AND IF LOW LEVEL WINDS JUST ABOVE THE INVERSION WEAKEN AHEAD OF APPROACHING SFC TROUGH...SOME MVFR FOG MAY FORM WITH VIS 3-5 MILES. IF ANY FOG DEVELOPS...IT SHOULD MIX OUT EARLY THURSDAY MORNING. EXPECT WEST TO NORTHWEST WINDS AFTER SUNSET TO AVERAGE 5 TO 10 KTS THROUGH 18Z. && .TOP WATCHES/WARNINGS/ADVISORIES...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TOPEKA KS 348 PM CDT WED SEP 26 2007 KSZ008>012-020>024-026-034>040-054>056-058-059-272100- REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY- POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS- WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON- 348 PM CDT WED SEP 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH CENTRAL AND NORTHEAST KANSAS. .DAY ONE...TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THERE IS A CHANCE FOR THUNDERSTORMS SATURDAY NIGHT AND SUNDAY MORNING ACROSS THE ENTIRE OUTLOOK AREA...WITH THUNDERSTORMS SHIFTING TO EAST CENTRAL KANSAS SUNDAY AFTERNOON. A SLIGHT CHANCE FOR THUNDERSTORMS RETURNS TO THE EASTERN HALF OF THE OUTLOOK AREA TUESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTERS WILL NOT BE NEEDED TONIGHT. 99
The national radar mosaic for the moment the first event began.
5 dense fog. Local standard time, as filed.
Fog initially overspread much of the county by 2am, and reduced visibilites to around 1 mile at 1am CST. The fog thickened over the course of the next hour, and visibilites dropped to 1/4mi, and periodically less than 1/4mi between 2am and 9am CST.
Fog initially overspread much of the county by 2am, and reduced visibilites to around 1 mile at 1am CST. The fog thickened over the course of the next hour, and visibilites dropped to 1/4mi, and periodically less than 1/4mi between 2am and 9am CST.
Fog initially overspread much of the county by 2am, and reduced visibilites to around 1 mile at 1am CST. The fog thickened over the course of the next hour, and visibilites dropped to 1/4mi, and periodically less than 1/4mi between 2am and 9am CST.
Fog initially overspread much of the county by 2am, and reduced visibilites to around 1 mile at 1am CST. The fog thickened over the course of the next hour, and visibilites dropped to 1/4mi, and periodically less than 1/4mi between 2am and 9am CST. Law enforcement officials also reported adverse driving conditions in the dense fog.
Fog initially overspread much of the county by 2am, and reduced visibilites to around 1 mile at 1am CST. The fog thickened over the course of the next hour, and visibilites dropped to 1/4mi, and periodically less than 1/4mi between 2am and 9am CST.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kansas in 2007Every state in 2007This day in weather historyWarnings in Kansas, September 2007
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: 60915, 60916, 60917, 60918, 60919.