Flood, Mahaska
- When
- November 1, 12:00 AM CST to November 3, 1:00 PM CST
- Where
- Mahaska County, 3.53 mi WNW of Peoria to 3.69 mi E of Rose Hill
- Cause
- Heavy Rain
- Property damage
- $10,000
- Reported by
- Official NWS Observations
- Coordinates
- 41.489, -92.864
Flooding in Iowa, November 1 to 3, 2009
October of 2009 had been a very wet month. Flooding that began in late October continued into early November.
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
- $30,000
- Crop damage
- None recorded
- Events
- 3
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 DMX wrote it up.
October of 2009 had been a very wet month. Flooding that began in late October continued into early November. The flooding was limited in nature, only affecting a few locations along the Skunk and Cedar River systems. Damage was minimal.
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 Des Moines, IA wrote its last area forecast discussion before the first event at Oct 31, 10:50 PM CST, 1 hour 10 minutes earlier.
Area forecast discussion, Oct 31, 10:50 PM CST, 1 hour 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 1150 PM CDT SAT OCT 31 2009 ...UPDATED FOR 06Z AVIATION DISCUSSION... .SHORT TERM...TONIGHT HI PRES RDG OVR WRN IA WILL ADVANCE ACROSS THE STATE THIS EVE. WNDS WILL DMSH RPDLY ARND SNST AND BECOME LGT SLY OVR NGT. ISENT ASCENT IN THE MID LVLS WILL BRING AN INCREASE IN MID LVL CLOUDINESS. BETWEEN THE WAA AND INC IN CLOUD COVER...OPTED TO GO WITH A NON-DIURNAL TEMP TREND TNGT. EXPECT TO SEE TEMPS BOTTOM OUT ARND MIDN...THEN HOLD FAIRLY STDTY AFT THAT. .LONG TERM...SUNDAY THROUGH SATURDAY FAIRLY QUIET EXTENDED PERIOD...WITH A FEW WEAK DISTURBANCES TO FOCUS ON. INITIAL PERIOD OF PRECIP SUNDAY NIGHT...AS WEAK COLD FRONT TO SLIDE THROUGH THE CWA. NAM BRINGS THE FRONT THROUGH A LITTLE SLOWER INTO MONDAY...BUT GFS/EC IN AGREEMENT WITH THE MORE PROGRESSIVE SOLUTION. EITHER WAY...LITTLE MOISTURE AVAILABLE SO EXPECT ONLY SOME LIGHT RAIN WITH THE FRONTAL PASSAGE. ANOTHER WEAK WAVE TO DROP SOUTHEAST THROUGH THE AREA TUESDAY WITH A WARM FRONT SLIDING EASTWARD THROUGH THE CWA. COULD SEE ENOUGH WEAK LIFT FOR ANOTHER SLIGHT CHANCE OF LIGHT RAIN. OTHERWISE FOCUS TURNS TOWARD THURSDAY SYSTEM. GFS DIFFERENT THAN THE EC WITH THIS SYSTEM...AS GFS DEVELOPING MORE OF A WEAK SHORTWAVE...WHILE THE EC REMAINS MUCH STRONGER/DEEPER WITH A DIGGING TROUGH INTO THE CENTRAL US. CANADIAN TRENDS TOWARD THE EC...BUT SLOWER...AND THE GFS ENSEMBLE SLIGHTLY STRONGER TRENDING TOWARD THE EC SOLUTION AS WELL. THEREFORE WENT WITH MORE OF A BLEND OF THE GFS/EC WITH A TREND TOWARD THE EC...AND INCREASED CLOUD COVER THURSDAY ALONG WITH INTRODUCING SOME SLIGHT CHANCE POPS. REMAINDER OF THE PERIOD LOOKS DRY INTO NEXT WEEKEND...WITH TEMPERATURES NEAR CLIMATOLOGY THROUGHOUT THE MID/LONG RANGE. && .AVIATION...01/06Z SFC RIDGE WILL PASS EAST OF THE STATE TONIGHT WITH SFC LOW ADVANCING ALONG THE US/CANADIAN BORDER THROUGH SUNDAY. WINDS WL BE LIGHT TONIGHT BUT INCREASE OUT OF THE SOUTH TOMORROW. VFR CIGS WILL OVERSPREAD THE STATE WITH UNRESTRICTED VSBYS THROUGH THE FORECAST PERIOD. && .DMX WATCHES/WARNINGS/ADVISORIES...NONE. && SHORT TERM...MS OCT 09 LONG TERM...MJB AVIATION...COGIL
Hazardous weather outlook, Oct 31, 2:14 PM CST, 9 hours 46 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 314 PM CDT SAT OCT 31 2009 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>073-081>083- 085-086-092>094-096-097-012015- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE- BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER- POWESHIEK-CASS-ADAIR-MADISON-WARREN-ADAMS-UNION-CLARKE-MONROE- WAPELLO-TAYLOR-RINGGOLD-DECATUR-APPANOOSE-DAVIS- 314 PM CDT SAT OCT 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. IAZ074-075-084-095-012015- MARION-MAHASKA-LUCAS-WAYNE- 314 PM CDT SAT OCT 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE AREA. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The radar
The national radar mosaic for the moment the first event began.
Event by event
3 flood. Local standard time, as filed.
Flood, Black Hawk
- When
- November 1, 1:15 AM CST to November 3, 6:52 AM CST
- Where
- Black Hawk County, 1.77 mi E of Benson to 0.81 mi NNW of North Cedar
- Cause
- Heavy Rain
- Property damage
- $10,000
- Reported by
- Official NWS Observations
- Coordinates
- 42.548, -92.515
Flood, Black Hawk
- When
- November 1, 4:00 PM CST to November 3, 2:00 PM CST
- Where
- Black Hawk County, 0.74 mi N of Finchford to 4.25 mi WNW of Farmer
- Cause
- Heavy Rain
- Property damage
- $10,000
- Reported by
- Official NWS Observations
- Coordinates
- 42.641, -92.552
What these are
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flooding in Arkansas, November 1 to 30, 2009
- Flooding in Louisiana, November 1 to 17, 2009
- Flooding in Texas, November 1 to 17, 2009
- Flood in Louisiana, November 1 to 30, 2009
- Flooding in Missouri, November 1 to 10, 2009
- Drought in Colorado, November 1 to 30, 2009
- Drought in Texas, November 1 to 30, 2009
- Drought in California, November 1 to 30, 2009
- High Surf in Hawaii, November 1 to 2, 2009
- Drought in Hawaii, November 1 to 30, 2009
- Drought in Wisconsin, November 1 to 30, 2009
- Drought in Utah, November 1 to 30, 2009
More
Every storm in Iowa in 2009Every state in 2009This day in weather historyWarnings in Iowa, November 2009
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: 198739, 198737, 198738.