Record high lake levels on Lake Michigan caused some isolated flooded areas near the lake on an ongoing basis.
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 GRB wrote it up.
Record high lake levels on Lake Michigan caused some isolated flooded areas near the lake on an ongoing basis.
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 Green Bay, WI wrote its last area forecast discussion before the first event at Feb 29, 10:45 PM CST, 1 hour 15 minutes earlier.
Area Forecast Discussion National Weather Service Green Bay WI 1045 PM CST Sat Feb 29 2020 Updated aviation portion for 06Z TAF issuance .SHORT TERM...Tonight and Sunday Issued at 340 PM CST Sat Feb 29 2020 Main forecast concerns for the short term are the cloud trends and their impact on temperatures mainly tonight and on Sunday. This evening through tonight...Besides a small patch of stratus moving east/northeast into portions of central and north-central Wisconsin this afternoon, the rest of the region remained sunny. Aloft, a broad upper-level ridge was building over the Upper Mississippi Valley and is expected to transition to a more zonal flow overnight. In addition, low-level moisture will increase over the region from west to east around midnight, allowing clouds to develop. Low temperatures will be about 10 degrees above normal in the low to middle 20s. Sunday...By early Sunday morning, a weak cold front will be nearing western Wisconsin. Model guidance indicates the low-level moisture ahead of the cold front will remain trapped by a strong temperature inversion through Sunday evening. This could keep a low stratus deck across the region into the evening. If any clearing occurs, temperatures could quickly rise, especially in the afternoon. Did raise high temperatures slightly from previous forecast to the middle 40s to lower 50s, which is about 15 degrees above normal. However, confidence is not high enough to have complete clearing. If clearing occurs, high temperatures could rise to the middle 50s, and near 60 degrees. The weak cold front will move across the region Sunday evening. Limited moisture is expected with this cold front, so dry conditions will prevail. .LONG TERM...Sunday Night Through Saturday Issued at 340 PM CST Sat Feb 29 2020 No significant systems are anticipated through the extended period, and temperatures are expected to remain above normal most days. The best chance of precipitation looks to be on Tuesday, as a cold front moves through the western Great Lakes. Upper level forcing will be present with a short-wave trough and the LFQ of an upper level jet. There also appears to be some instability, with H8-H7 lapse rates of 6-7 C/KM. The best forcing should impact northern WI, so will have the highest pops there. The GFS model is more aggressive with precipitation than the ECMWF, but will only carry chance pops for now. Another small chance of precipitation may occur across northern WI on Wednesday night and Thursday, as a Pacific low pressure passes by just to our north. A brief period of weak lake-effect snow showers may impact Vilas County on Thursday night, after the low shifts east and cooler northwest flow develops. lows should be mainly in the teens and 20s, with highs in the upper 30s and 40s. && .AVIATION...for 06Z TAF Issuance Issued at 1044 PM CST Sat Feb 29 2020 Warm air advection is expected to increase across the area tonight through much of Sunday. This will allow a temperature inversion to steepen and create favorable conditions for LLWS at each of the TAF sites, mainly tonight into early Sunday morning. This will generally be in the 35-40kt range and generally around 1500-2000ft. There are some indications that a MVFR ceiling may develop at times Sunday into Sunday night. This will also be a result of WAA along with an approaching cold front Sunday afternoon/evening. Hinted at this ahead of the front, over the western TAF sites, but may need to extend eastward. Otherwise, high clouds are expected to increase across the area. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM.....Hykin LONG TERM......Kieckbusch AVIATION.......Cooley
Hazardous Weather Outlook National Weather Service Green Bay WI 238 PM CST Sat Feb 29 2020 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-012045- Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano- Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 238 PM CST Sat Feb 29 2020 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Saturday Warmer than average temperatures may cause melting of ice in rivers, and produce local ice jam flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed tonight. LMZ521-522-541>543-012045- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 238 PM CST Sat Feb 29 2020 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Saturday The probability for widespread hazardous weather is low. Hykin/Kieckbusch
The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Areas around the Kewaunee Marina were often under water due to record high lake levels.
North Bayshore Road was often under water due to record high lake levels.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2020Every state in 2020This day in weather historyWarnings in Wisconsin, March 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: 870849, 870850.