Drought — Adams, Wisconsin

2023-09-01 to 2023-09-30 · Adams, Wisconsin

Event narrative

Ongoing drier than normal conditions, comprised of 7 consecutive weeks of extreme drought (D3), expanded in Adams County through September. Through September 11th, approximately a quarter inch of rainfall resulted in 50% below normal topsoil moisture. The increased longevity of abnormally dry conditions decreased water levels along the Wisconsin River to 10% of normal, marooning and killing many mussels along its banks. A series of storms provided 2 to 4 inches of rainfall during the second half of September, up to 2 inches above normal for the time period. This above normal rainfall lessened drought severity to extreme (D2) across the county. Due to the drought, the United States Department of Agriculture had declared Adams County as a primary natural disaster area on July 25th and a contiguous natural disaster area on August 10th and September 13th.

Wider weather episode

Drought conditions initially worsened across western and central Wisconsin during the first half of September before slightly alleviating towards the end of the month. Persistent abnormally dry conditions resulted in most of western into central Wisconsin experiencing at least severe drought (D2) at the start of September, with more than half of the area in at least extreme drought (D3). September rainfall totals were highly variable, ranging from 2.5 to 8 inches across the area. Accompanying rainfall departures varied from 2 inches below normal along the Mississippi River Valley to 4 inches above normal in central Wisconsin. Through the middle of the month, topsoil moisture was less than half of normal. Unirrigated crops either died or were stunted. Corn silage had to be cut weeks early due to the lack of moisture. Well below normal water levels created difficulties for cranberry farmers during the harvest in central Wisconsin and also resulted in a mass die-off of clams along the Wisconsin River. The Wisconsin Department of Natural Resources placed all of southern Wisconsin in high fire danger, implementing burn restrictions for applicable areas. Additionally, many towns frequently issued temporary fire bans due to the widespread dry grasses. A series of storms through the latter half of the month provided near 7 of rainfall from western into west-central Wisconsin, up to 4 above normal for the time period in spots. During this time, a prolonged event featuring multiple storms provided periodic heavy rain from September 22nd into September 26th. The highest 24 hour total rainfall reports included 5.45 near Lemonweir (Juneau County), 4.8 near Burns (La Crosse County), and 4.1 near Platteville (Grant County). The heavy rain helped to slightly reduce drought severity across much of the area, eliminating the exceptional drought (D4) while also reducing the area of extreme drought (D3) and severe drought (D2).

Source: NOAA Storm Events Database, event_id 1139926. Narrative written by the NWS forecast office that issued the report.