Rainfall and snowmelt runoff led to minor flooding at the Cedar River at Cedar Falls late in the month.
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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 DMX wrote it up.
Rainfall and snowmelt runoff led to minor flooding at the Cedar River at Cedar Falls late in the month.
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 Feb 22, 5:37 AM CST, 1 hour 23 minutes earlier.
Area Forecast Discussion National Weather Service Des Moines IA 537 AM CST Wed Feb 22 2017 .SHORT TERM.../Today through Tonight/ Issued at 258 AM CST Wed Feb 22 2017 Confidence: High. Main theme today will be warmth once again. Near to record highs expected across the area today. Though some mid to high level clouds likely over the north through the morning/early afternoon hours... getting such a warm start today that even the north should near 60 by the afternoon which will eclipse records there. Over the central and south...pre-frontal warming aloft to 14-15C over the southeast will likely push highs into the mid 70s there with lower 70s across the I80 corridor. This will be the last day of our extraordinarily warm weather for February and will mark the 7th day in a row that Des Moines has been in the 60s/70s. Models remain in good agreement today that a cool front will drop southeast of the region by 00z this evening with lower clouds increasing from the northwest overnight as colder air settles across the region. Though the term is relative...tonights lows will still be quite pleasant for this time of the year with upper 20s far northwest to the mid 40s in the far southeast. Winds today will increase to 15 to 20 mph from the south/west with the frontal passage and over the northwest...about 15 to 25 mph by the afternoon hours. Tonight northwest winds will drop to 8 to 15 mph over the area. No precipitation is expected though with increasing isentropic lift to our west and southwest overnight tonight...shower chances will be increasing over the south by 12z and into the morning hours. .LONG TERM.../Thursday through Tuesday/ Issued at 258 AM CST Wed Feb 22 2017 Showers will develop throughout Thursday and become widespread across Iowa as isentropic lift proceeds a trough of low pressure over the Rockies. This trough will help in the development of a surface low over western Kansas. Low pressure tracks have been varying among the models over the past several days as they typically do. In this instance, this could be a result of southern stream energy that the models may be having difficulty resolving how exactly it will interact with the main trough/northern stream energy. Overall, this model cycle found the low tracks farther south and perhaps a bit slower compared to the 12z models. As the low approaches Iowa Thursday night, some elevated instability will exist over the southern half to southern 2/3rds of Iowa. MUCAPE values are marginal so while there may be some thunder, not much confidence in anything more than that. Farther to the northwest, cold air will begin to wrap around the low and the transition from rain to snow will begin over northwest Iowa Thursday night. Soundings continue to indicate that the cold air will come in fast enough that sleet/freezing rain will be very limited if non-existent and have kept mention of these precipitation types out of the forecast. As the low moves through the state on Friday, the dry slot will reach southern Iowa bringing a brief dry period. However, as the low moves east towards the Great Lakes, the precipitation transition will work its way to the southeast. Winds will increase on Friday with sustained winds averaging 15 to 25 mph. Over northern Iowa, confidence is growing in wind gusts over 40 mph. With the gusty winds and falling snow there, blowing and drifting snow will likely have a significant impact on travel over at least the far northern part of the state late Friday into Friday night. With the snow gradually tapering off after midnight Friday, have extended the Winter Storm Watch until that time. Snowfall was shifted a bit south with models tracks farther south and therefore added a few counties to the south and east of the existing counties of the watch. In the remainder of the long term period, travel impacts may linger into the first part of Saturday before gusty winds abate as high pressure begins to move in allowing the pressure gradient to relax later in the day. Saturday will be rather cold, especially with all the recent very warm weather. Otherwise, primarily zonal flow will set up over the state into early next week. Confidence is low beyond Saturday as several weak, fast-moving short waves pass through the region bringing chances of precipitation of which the type will be dependent on the exact track. && .AVIATION.../For the 12Z TAFS through 12Z Thursday morning/ Issued at 536 AM CST Wed Feb 22 2017 Main concern early on will be wind and LLWS over the region through 13z. Winds mix aft 15z through 23z before relaxing again. VFR conditions expected through most of forecast with KMCW seeing MVFR conditions aft 08z and KALO between 10-12z Thursday as shield of stratus moves south into the region. South southwest winds shift to north northeast through period with passage of cold front through entire region by 00z this evening. /rev && .DMX WATCHES/WARNINGS/ADVISORIES... Winter Storm Watch from Thursday evening through Friday evening for IAZ004>007-015-016-023-033. && SHORT TERM...REV LONG TERM...Ansorge AVIATION...REV
Hazardous Weather Outlook National Weather Service Des Moines IA 643 AM CST Wed Feb 22 2017 IAZ004>007-015-016-023-033-231245- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Pocahontas-Sac- 643 AM CST Wed Feb 22 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A winter storm watch is in effect for the area Thursday evening through Friday evening. Please refer to the National Weather Service Website at Weather.Gov/DesMoines for further details. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed but snowfall amounts with the upcoming storm would be greatly appreciated. IAZ017-024>028-034-035-044>046-231245- Cerro Gordo-Humboldt-Wright-Franklin-Butler-Bremer-Calhoun- Webster-Crawford-Carroll-Greene- 643 AM CST Wed Feb 22 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Wintry precipitation is possible Thursday night and Friday with the best chance for moderate to heavy snow accumulations north and northwest of the area. In addition, gusty northwest winds are expected to develop on Friday. Hazardous travel impacts may be possible Thursday night into Friday night. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. IAZ036>039-047>050-057>059-231245- Hamilton-Hardin-Grundy-Black Hawk-Boone-Story-Marshall-Tama- Audubon-Guthrie-Dallas- 643 AM CST Wed Feb 22 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Isolated to scattered non-severe thunderstorms will be possible over central and southeast Iowa late Thursday afternoon through Thursday night. A light wintry mix of precipitation will be possible Friday into Saturday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. IAZ060>062-070>075-081>086-092>097-231245- Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska- Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur- Wayne-Appanoose-Davis- 643 AM CST Wed Feb 22 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT Due to near record warmth...dry conditions and gusty winds there is an elevated grassland fire threat across the area this afternoon. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Isolated to scattered non-severe thunderstorms will be possible over central and southeast Iowa late Thursday afternoon through Thursday night. A light wintry mix of precipitation will be possible Friday into Saturday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Cedar River at Cedar Falls crested at 90.02 feet on 24 February at 08:30 UTC.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2017Every state in 2017This day in weather historyWarnings in Iowa, February 2017
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: 679415.