Flooding along the Mississippi River that began in late May at McGregor (Clayton County) ended on the first day of June.
Every event with a place to put it. Tap one for its entry below.
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 ARX wrote it up.
Flooding along the Mississippi River that began in late May at McGregor (Clayton County) ended on the first day of June.
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 La Crosse, WI wrote its last area forecast discussion before the first event at May 31, 10:47 PM CST, 1 hour 13 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 1147 PM CDT Wed May 31 2017 .SHORT TERM...(Tonight through Thursday night) Issued at 245 PM CDT Wed May 31 2017 Main fcst concerns this period are lows/highs tonight/Thu then returning SHRA/TSRA chances Thu night. Data analysis at 18z had a broad area of low pressure centered near Jame's Bay with a lobe into eastern WI. High pressure was centered from southern Man to western IA. Tighter pressure gradient between the 2 remained over the fcst area, with west to NW winds 10-20mph gusting 20-30mph common with diurnal warming/mixing to around 800mb early this afternoon. Diurnal cumulus from late this morning already on the way out of the area as drier air/deeper mixing continued to spread into the area on the W-NW sfc-700mb flow. No issues noted with 31.12z model initializations. Solutions very similar for tonight thru Thu night as mid level ridging is pushed across the plains and hgts gradually rise over the region. Trend favors more progressive of earlier models, including the shortwave energy crossing the norhtern Rockies Thu/Thu night. Short-term fcst confidence is generally good this cycle. For the short term, quiet, dry weather tonight/Thu as the hgts rise and sfc ridge axis over the plains moves east into/across the Upper Midwest. Light winds, clear skies, dry airmass tonight near/under the ridge axis favor strong radiational cooling and trended toward cooler of guidance lows tonight. May yet see some patchy frost in the normally colder, low-laying areas of central WI along/NE of I-94 where a few lows may dip into the mid 30s. No frost advisory planned at this point as any patchy frost looks to be rather brief for an hour or 2 just before sunrise. Not much for low level warm advection Thu with the sfc-850mb ridge axis near/over the area and light winds. With plenty of June 1st sunshine expected, airmass continues to modify in place, with consensus highs mostly in the mid/upper 70s looking good. Low level warm advection increases Thu night, with the sfc-850mb warm front ahead of the plains low/trough expected to lift NE into IA. Increasingly moist airmass (PW values 1 to 1.5 inch) and MUCAPE of 500-1000 j/kg also progged to lift quickly NE toward/into the fcst area by later Thu night. The rapid moisture/CAPE return initially seems a bit fast, but a higher PW airmass (1+ inch) is already located over eastern KS/SW half of MO. The 20-30% consensus SHRA/TSRA chances across mainly the SW half of the fcst area by late Thu night reasonable at this time. .LONG TERM...(Friday through Wednesday) Issued at 245 PM CDT Wed May 31 2017 For Friday thru Saturday night: main fcst concerns this period are SHRA/TSRA chances thru the period and locally heavy rain potential Fri night/Sat. 31.12z model runs offer improving agreement on shortwave energy to be moving east across the central/northern plains Fri/Fri night, move across the region Sat, then a stronger northern stream trough to drop into the western great lakes Sat night. Given detail differences with impacts on SHRA/TSRA location/timing/chances much of this period, fcst confidence for Fri thru Sat night is average. A trough of low pressure will be coming across the plains with the shortwave Fri/Fri night, with a warm front expected to be located somewhere over or just SW of the fcst area by 00z Sat. This front to be the focus for SHRA/TSRA Fri/Fri night as an airmass with around 1.5 inch (or more) PW and MUCAPE of 1.5K to 2.5K j/kg is lifted northward into/over the boundary. Highest CAPE progged SW of the MS river. Stronger of the deep shear is progged NE of the MS river, where lower level flow is more backed ahead of the warm front. Swody3 marginal severe risk seems OK for now. Bigger concern is the potential for more locally heavy rains with the PW values around 1 std deviation above normal and a warm cloud depth of 3500-4000 meters centered on Fri night. Tropical/warm rain process would allow TSRA from later Fri afternoon thru Sat to be efficient rain producers capable of the locally heavy rains. Again, the question is where with the warm front be late Fri and where will it move to thru Sat to be the focus for SHRA/TSRA initiation. Will stay with the model/ensemble consensus SHRA/TSRA chances for Fri-Sat. Reasonable consensus for the northern stream trough dropping in Sat night to sweep the sfc low and its fronts thru the area by 12z Sun, with low level cold advection/drying to spread in behind it. Decreasing SHRA/TSRA chances from W to E Sat night look good. Fri/Sat to be a warmer period with the more southerly flow/low level warm advection ahead of the approaching trough. Warmest low level airmass is actually over the area Sat, but warming this day looking tempered by more clouds vs. Friday. Consensus highs near to above normal Fri/Sat appear well trended for now. Fri to feel summery with many highs near 80F and dew points climbing to around 60F. For Sunday through Wednesday (days 4-7): main fcst concerns this period are lingering mainly SHRA chances Sun into Mon. Medium range model runs of 31.00z/31.12z in reasonable agreement for mid level troughing to remain over the region Sun/Mon, with stronger northern stream shortwave to drop thru the flow. By Tue the pattern progged to start progressing with shortwave ridging building in by the middle of next week. Fcst confidence this period is average. With deep, cool cyclonic flow and shortwaves over the region, the small consensus SHRA chances Sun-Mon are reasonable. With potential for diurnal MUCAPE under the cooler 700-500mb temps Sun/Mon, small afternoon TSRA chances also reasonable, as are temps a category or 2 below the normals under the cool pool aloft. Drying and more sunshine slated to return for Tue/Wed as mid level hgts rise and the shortwave ridging builds in. With this shortwave ridging expected to build in from the NW, around the perimeter of broader ridging over western NOAM, the boundary layer flow generally remains out of the N to NE until late Wed. Consensus highs/lows remaining a category or 2 below normal thru Wed appear well trended for now. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 1147 PM CDT Wed May 31 2017 High pressure will drift through the region the next 24 hours, delivering mainly clear skies (maybe a little cirrus at times) along with much lighter winds than those seen on Wednesday. Speeds will remain mainly under 8 knots, with a variable direction as the center of the high pressure ridge arrives directly overhead into the afternoon. && .HYDROLOGY...Through Saturday Issued at 245 PM CDT Wed May 31 2017 Flood Warnings continue along the Mississippi River at both McGregor and Guttenberg Dam 10 through at least the latter half of the week. Meanwhile, elevated water levels continue along the Mississippi River farther north. Locally heavy rainfall is possible at times mainly Friday afternoon thru Saturday, but the threat is highly dependent on the position of an expected warm front. Confidence is increasing somewhat for a period of heavy rain sometime mainly Friday night/Sat as forecast guidance slowly converges on a preferred solution, but lower confidence in the frontal location and where any heavy rain threat lies early in the weekend. Will continue to watch heavy rainfall potential over the next few days. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && SHORT TERM...RRS LONG TERM....RRS AVIATION...Lawrence HYDROLOGY....RRS
Hazardous Weather Outlook National Weather Service La Crosse WI 332 AM CDT Wed May 31 2017 IAZ008>010-018-019-029-MNZ079-086>088-094>096-WIZ017-029-032>034- 041>044-053-055-011200- Mitchell-Howard-Winneshiek-Floyd-Chickasaw-Fayette-Wabasha-Dodge- Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-Buffalo- Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Richland- 332 AM CDT Wed May 31 2017 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms are possible at times Thursday night through Sunday. Some thunderstorms may become strong Friday and Friday night, capable of producing hail, gusty winds, and localized heavy rainfall. It is too early to determine if severe weather will occur with additional thunderstorms this weekend. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ011-030-WIZ054-061-011200- Allamakee-Clayton-Crawford-Grant- 332 AM CDT Wed May 31 2017 This Hazardous Weather Outlook is for portions of northeast Iowa and southwest Wisconsin. .DAY ONE...Today and Tonight Minor flooding continues along portions of the Mississippi River south of Lansing Iowa. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Minor flooding continues along portions of the Mississippi River south of Lansing Iowa through the latter half of the week. Thunderstorms are possible at times Thursday night through Sunday. Some thunderstorms may become strong Friday and Friday night, capable of producing hail, gusty winds, and localized heavy rainfall. It is too early to determine if severe weather will occur with additional thunderstorms this weekend. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. Rogers
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Mississippi River flooding that began in late May at McGregor ended on June 1st.
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, June 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: 705501.