Hail, Jefferson
- When
- September 9, 3:25 PM CST to 3:26 PM CST
- Where
- Jefferson County, Nortonville
- Measured
- 1 in hail
- Reported by
- Emergency Manager
- Coordinates
- 39.420, -95.330
Hail and Damaging Wind in Kansas, September 9, 2011
Thunderstorms initiated in the afternoon across northeast Kansas as a shortwave trough rotated around a large cutoff upper level low. A couple of these storms produced marginal sized hail and wind damage.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 2
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.
What happened
The episode as NWS TOP wrote it up.
Thunderstorms initiated in the afternoon across northeast Kansas as a shortwave trough rotated around a large cutoff upper level low. A couple of these storms produced marginal sized hail and wind damage.
What forecasters said that day
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 9, 2:11 PM CST, 1 hour 14 minutes earlier.
Area forecast discussion, Sep 9, 2:11 PM CST, 1 hour 14 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TOPEKA KS 311 PM CDT FRI SEP 9 2011 .DISCUSSION... CURRENT WATER VAPOR SHOWING UPPER LOW STALLING ACROSS THE LOWER OHIO RIVER VALLEY AT THIS TIME. MID-LEVEL ASCENT ROTATING AROUND LOW HAS COINCIDED WELL WITH PEAK HEATING TO RESULT IN SOME ISOLATED ACTIVITY ACROSS THE AREA...WITH A FEW REPORTS OF PEA-SIZE HAIL AND HEAVY RAIN. SHOWERS/STORMS SHOULD DIMINISH ACROSS THE AREA AFTER SUNSET...BUT CANNOT RULE OUT LINGERING ACTIVITY THROUGH THE NIGHT...AND WILL LEAVE SLIGHT CHANCES. FOR TOMORROW...NOT OVERLY OPTIMISTIC ABOUT PRECIP CHANCES...WITH NO WELL-DEFINED AREA OF ASCENT AND WEAKENING UPPER LOW MEANING LOWER LAPSE RATES ALOFT. DRIED OUT THE WEST GIVEN MINIMAL DEVELOPMENT THERE TODAY /IN BETTER CONDITIONS/... AND BACKED OFF REST OF AREA A TAD. TEMPERATURES SHOULD BE SIMILAR TO TODAY MOST AREAS...POSSIBLY A DEGREE OR TWO WARMER ACROSS THE WEST. SUNDAY AND MONDAY...UPPER LOW KICKS TO THE EAST AS UPSTREAM SYSTEM MOVES ACROSS SOUTHWEST CANADA. IN RESPONSE SOUTHERLY FLOW RETURNS WITH THERMAL RIDGE BUILDING...RESULTING IN TEMPERATURES CLIMBING ABOVE NORMAL UNDER SUNNY SKIES...ESPECIALLY MONDAY. NEXT SYSTEM PUSHES INTO THE UPPER MIDWEST TUESDAY...WITH FLOW TURNING NORTHWESTERLY AND COLD FRONT PUSHING SOUTH ACROSS THE AREA. CURRENT TIMING ON FRONT PUSHES IT THROUGH EARLY TUESDAY...WHICH WOULD LIMIT PRECIP CHANCES AS UPPER SUPPORT WOULD BE FAR NORTH AND EAST. IF FRONT WERE TO SLOW DOWN AND PASS DURING THE AFTERNOON OR EVENING...CONVECTION WOULD BECOME MORE REALISTIC. ANOTHER REINFORCING SHOT OF COLD AIR LATER IN THE WEEK AS UPPER LOW DEEPENS IN THE HUDSON BAY AREA... RESULTING IN FURTHER COOLING ACROSS THE AREA. MODELS TRYING TO HINT AT PRECIP CHANCES INCREASING AT THE END OF THE PERIOD...BUT WITH DRY AIRMASS IN PLACE BEHIND FRONTAL PASSAGE HAVE LEFT FORECAST DRY AT THIS TIME. JJZ && .AVIATION... VFR CONDITIONS EXPECTED OVER THE TAF PERIOD AT ALL TERMINALS. EXPECT ISOLATED SHOWER AND THUNDERSTORM ACTIVITY TO DEVELOP THIS AFTERNOON...AND ADDED MENTION DURING AFTERNOON/EARLY EVENING AT KTOP AND KFOE...BUT DO NOT EXPECT THIS ACTIVITY TO IMPACT FLIGHT CATEGORIES. NORTHWEST WINDS AROUND 10 KNOTS THIS AFTERNOON... DECREASING IN THE EVENING. && .TOP WATCHES/WARNINGS/ADVISORIES... NONE. &&
Hazardous weather outlook, Sep 9, 2:20 PM CST, 1 hour 5 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TOPEKA KS 320 PM CDT FRI SEP 9 2011 KSZ008>012-020>024-026-034>040-054>056-058-059-102030- REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY- POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS- WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON- 320 PM CDT FRI SEP 9 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH CENTRAL AND NORTHEAST KANSAS. .DAY ONE...THIS AFTERNOON AND TONIGHT. ISOLATED THUNDERSTORMS ARE POSSIBLE FRIDAY AFTERNOON AND EVENING. A FEW THUNDERSTORMS MAY BRING PEA-SIZE HAIL AND HEAVY RAIN...BUT SEVERE WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. ISOLATED THUNDERSTORMS ARE POSSIBLE ON SATURDAY AFTERNOON. SEVERE WEATHER IS NOT EXPECTED. THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS ACROSS PARTS OF THE AREA LATE TUESDAY AND TUESDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.
In the hours before
Special weather statement, Sep 9, 1:31 PM CST, 1 hour 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TOPEKA KS 231 PM CDT FRI SEP 9 2011 KSZ054-091945- LYON- 231 PM CDT FRI SEP 9 2011 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LYON COUNTY... THROUGH 245 PM CDT...A THUNDERSTORM WILL MOVE SOUTH AT 20 MPH ACROSS PORTIONS OF CENTRAL LYON COUNTY. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THIS STORM IS CAPABLE OF PRODUCING PENNY SIZE HAIL... WINDS UP TO 40 MPH AND HEAVY RAIN. SOME LOCATIONS THAT COULD BE AFFECTED INCLUDE NEOSHO RAPIDS AND EMPORIA. MOTORISTS ALONG THE KANSAS TURNPIKE BETWEEN MILE MARKERS 128 AND 143 COULD ALSO BE AFFECTED. MOTORISTS ALONG INTERSTATE 35 BETWEEN MILE MARKERS 128 AND 141 COULD ALSO BE AFFECTED. && LAT...LON 3830 9597 3831 9624 3861 9621 3860 9598 TIME...MOT...LOC 1931Z 002DEG 19KT 3851 9610
Special weather statement, Sep 9, 1:56 PM CST, 1 hour 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TOPEKA KS 256 PM CDT FRI SEP 9 2011 KSZ040-055-056-092030- DOUGLAS-FRANKLIN-OSAGE- 256 PM CDT FRI SEP 9 2011 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL OSAGE...SOUTHWESTERN DOUGLAS AND NORTHWESTERN FRANKLIN COUNTIES... THROUGH 330 PM CDT...A THUNDERSTORM WILL MOVE SOUTHEAST AT 25 MPH ACROSS PORTIONS OF EAST CENTRAL OSAGE...SOUTHWESTERN DOUGLAS AND NORTHWESTERN FRANKLIN COUNTIES. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THIS STORM IS CAPABLE OF PRODUCING PEA SIZE HAIL AND WINDS UP TO 40 MPH. SOME LOCATIONS THAT COULD BE AFFECTED INCLUDE POMONA LAKE...POMONA AND QUENEMO. MOTORISTS ALONG INTERSTATE 35 BETWEEN MILE MARKERS 177 AND 183 COULD ALSO BE AFFECTED. && LAT...LON 3856 9525 3850 9553 3879 9566 3886 9545 TIME...MOT...LOC 1957Z 337DEG 21KT 3873 9551
Special weather statement, Sep 9, 2:18 PM CST, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
318 PM CDT FRI SEP 9 2011
KSZ054-058-092045-
COFFEY-LYON-
318 PM CDT FRI SEP 9 2011
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN LYON AND NORTHERN COFFEY
COUNTIES...
THROUGH 345 PM CDT...A LINE OF THUNDERSTORMS WILL MOVE SOUTHEAST AT
20 MPH ACROSS PORTIONS OF SOUTHERN LYON AND NORTHERN COFFEY COUNTIES.
NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THESE STORMS ARE
CAPABLE OF PRODUCING PEA SIZE HAIL AND WINDS UP TO 40 MPH. SOME
LOCATIONS THAT COULD BE AFFECTED INCLUDE COFFEY COUNTY AIRPORT...JOHN
REDMOND RESERVOIR...NEW STRAWN AND BURLINGTON. MOTORISTS ALONG
INTERSTATE 35 BETWEEN MILE MARKERS 141 AND 150 COULD ALSO BE
AFFECTED.
&&
LAT...LON 3817 9597 3817 9635 3817 9636 3831 9636
3844 9591 3843 9583 3821 9556 3811 9596
TIME...MOT...LOC 2019Z 316DEG 16KT 3835 9588 3826 9621
3816 9658
BOWENSpecial weather statement, Sep 9, 2:37 PM CST, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
337 PM CDT FRI SEP 9 2011
KSZ038-054-055-092100-
LYON-OSAGE-WABAUNSEE-
337 PM CDT FRI SEP 9 2011
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN OSAGE...NORTHEASTERN LYON
AND SOUTHEASTERN WABAUNSEE COUNTIES...
THROUGH 400 PM CDT...A THUNDERSTORM WILL MOVE SOUTH AT 25 MPH ACROSS
PORTIONS OF WESTERN OSAGE...NORTHEASTERN LYON AND SOUTHEASTERN
WABAUNSEE COUNTIES. TRAINED WEATHER SPOTTERS REPORTED THIS STORM WAS
PRODUCING WINDS UP TO 40 MPH AND DIME SIZE HAIL 3 MILES NORTH OF
ESKRIDGE. SOME LOCATIONS THAT COULD BE AFFECTED INCLUDE
HARVEYVILLE...READING...OSAGE CITY AND ADMIRE. MOTORISTS ALONG THE
KANSAS TURNPIKE BETWEEN MILE MARKERS 140 AND 161 COULD ALSO BE
AFFECTED.
&&
LAT...LON 3892 9621 3897 9600 3890 9594 3887 9594
3887 9592 3855 9569 3847 9607
TIME...MOT...LOC 2037Z 339DEG 22KT 3882 9603
BOWENSpecial weather statement, Sep 9, 2:56 PM CST, 29 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
356 PM CDT FRI SEP 9 2011
KSZ010-011-023-092130-
MARSHALL-NEMAHA-POTTAWATOMIE-
356 PM CDT FRI SEP 9 2011
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN POTTAWATOMIE...
SOUTHWESTERN NEMAHA AND SOUTHEASTERN MARSHALL COUNTIES...
THROUGH 430 PM CDT...A THUNDERSTORM WILL MOVE SOUTHWEST AT 25 MPH
ACROSS PORTIONS OF NORTHEASTERN POTTAWATOMIE...SOUTHWESTERN NEMAHA
AND SOUTHEASTERN MARSHALL COUNTIES. NATIONAL WEATHER SERVICE DOPPLER
RADAR INDICATED THIS STORM IS CAPABLE OF PRODUCING PEA SIZE HAIL AND
STRONG WINDS OF 40 TO 50 MPH. SOME LOCATIONS THAT COULD BE AFFECTED
INCLUDE ONAGA...WHEATON AND BLAINE.
&&
LAT...LON 3963 9601 3957 9603 3957 9604 3955 9604
3931 9611 3944 9648 3972 9621
TIME...MOT...LOC 2056Z 029DEG 23KT 3958 9618
BOWENSpecial weather statement, Sep 9, 3:22 PM CST, 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
422 PM CDT FRI SEP 9 2011
KSZ026-092145-
JEFFERSON-
422 PM CDT FRI SEP 9 2011
...SIGNIFICANT WEATHER ADVISORY FOR JEFFERSON COUNTY...
THROUGH 445 PM CDT...A THUNDERSTORM WILL MOVE SOUTHWEST AT 35 MPH
ACROSS PORTIONS OF JEFFERSON COUNTY. NATIONAL WEATHER SERVICE DOPPLER
RADAR INDICATED THIS STORM IS CAPABLE OF PRODUCING PENNY SIZE HAIL
AND STRONG WINDS OF 40 TO 50 MPH. SOME LOCATIONS THAT COULD BE
AFFECTED INCLUDE WINCHESTER...VALLEY FALLS...MCLOUTH...OSKALOOSA...
PERRY LAKE...OZAWKIE AND MERIDEN.
&&
LAT...LON 3908 9525 3918 9559 3924 9559 3943 9542
3942 9518 3942 9517 3929 9517
TIME...MOT...LOC 2122Z 031DEG 31KT 3942 9528
BOWENThe radar
The Topeka radar (KTWX), 91 km away, was scanning. The volume nearest the first event began at 21:26 UTC.
Event by event
1 hail, 1 thunderstorm wind. Local standard time, as filed.
Thunderstorm Wind, Shawnee
- When
- September 9, 5:15 PM CST to 5:16 PM CST
- Where
- Shawnee County, 2.98 mi SW of Topeka
- Measured
- 56 kt (64 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 39.020, -95.720
Tree damage at 29th and Fairlawn with 8 inch limb down as result of small microburst.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flood in Virginia, September 9, 2011
- Flash Flooding and Hail in Arizona, September 9, 2011
- Damaging Winds in Arizona, September 9, 2011
- High Surf in Hawaii, September 9 to 12, 2011
- Flash Flooding and Hail in California, September 9 to 10, 2011
- Lightning Strike in Colorado, September 9, 2011
- Flooding in Virginia, September 9, 2011
- Damaging Winds in Puerto Rico, September 9, 2011
- Flash Flooding and Damaging Wind in Utah, September 9 to 10, 2011
- Waterspout in Gulf of Mexico, September 9, 2011
- Marine Thunderstorm Winds in South Atlantic Coastal Waters, September 9, 2011
- Hail and Damaging Wind in Missouri, September 9, 2011
More
Every storm in Kansas in 2011Every state in 2011This day in weather historyWarnings in Kansas, September 2011
Sources
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: 348884, 348885.