Heavy rains upstream of De Witt associated with the remnants of Tropical Depression Cristobal on June 9th eventually led to major river flooding on the Wapsipinicon River near De Witt the 16th into the 19th.
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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 DVN wrote it up.
Heavy rains upstream of De Witt associated with the remnants of Tropical Depression Cristobal on June 9th eventually led to major river flooding on the Wapsipinicon River near De Witt the 16th into the 19th.
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 Quad Cities, IA wrote its last area forecast discussion before the first event at Jun 15, 5:35 PM CST, 3 hours 25 minutes earlier.
Area Forecast Discussion National Weather Service Quad Cities IA IL 635 PM CDT Mon Jun 15 2020 ...00z AVIATION UPDATE... .SYNOPSIS... Issued at 226 PM CDT Mon Jun 15 2020 High pressure east of the area continues to keep drier air across the area this afternoon. High clouds on the periphery of the warm/moist airmass across western Iowa were reported across the area along with some short lived showers across eastern Iowa. This high pressure and interface between the drier lake enhanced airmass and the continental moist airmass will continue to drive the weather through the short term. && .SHORT TERM...(This Evening through Tuesday) ISSUED AT 226 PM CDT Mon Jun 15 2020 Dry weather is expected across the area for the short term. Temperatures begin to warm up tomorrow as weak H85 WAA moves into the area. The deeper moisture starts to move into the area later in the period and towards Wednesday. Tonight will feature another night with lows in the 50s across the CWA. .LONG TERM...(Tuesday Night through Monday) ISSUED AT 226 PM CDT Mon Jun 15 2020 Temperatures An upper-level ridge over the Central U.S. will lead to very warm conditions across eastern Iowa and northwest Illinois through Friday. Highs are forecast in the mid 80s to lower 90s. Humidity will increase through the week, becoming most noticeable from Friday though Sunday as dewpoints reach the mid to upper 60s. Precipitation Dry conditions are expected through at least Thursday afternoon before a slow moving cold front brings chances for scattered showers and storms Friday into Sunday; it's too early to determine the potential for severe weather. Right now, models have very low deep layer shear on Friday and then a bit higher on Saturday. Model blend temperatures are back to near normal by Sunday. Uttech && .AVIATION...(For the 00Z TAFS through 00Z Tuesday Evening) ISSUED AT 633 PM CDT Mon Jun 15 2020 Another VFR TAF cycle as high pressure acrs the western GRT LKS maintains dry conditions acrs the region. Just some streaks of mid and high clouds, with Tue afternoon sctrd CU at 3-5K FT AGL along and east of the MS RVR. Generally southeast sfc winds of 5-10 KTS thru the period. ..12.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && SYNOPSIS...Gibbs SHORT TERM...Gibbs LONG TERM...Uttech AVIATION...12
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 306 AM CDT Mon Jun 15 2020 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-160815- Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 306 AM CDT Mon Jun 15 2020 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...TODAY AND TONIGHT Area rivers are experiencing flooding. Please see the latest Flood Statements and Flood Warnings for details. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY There is a chance for thunderstorms from Thursday night through Sunday. It is too early to determine the potential for severe weather. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight. DLS
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Wapsipinicon River near De Witt rose above its major flood stage of 12.5 feet on July 16 around 9 PM CST and fell back below major flood stage around 145 AM CST. The river crested around 13.1 feet 8 AM CST.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2020Every state in 2020This day in weather historyWarnings in Iowa, June 2020
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: 901187.