Full Breakdown
Heavy Rain Forecast Hits Minnesota Friday, Potential for 1-3+ Inches
By Drooid · · How we work
Core Event: Friday’s Tropical-Derived Storm Brings Widespread Rain
A storm system originating in the eastern tropical Pacific is expected to move into the Upper Midwest from Thursday night into early Saturday. Meteorologists describe the system as “potent” and capable of delivering a swath of heavier rain across central and southern Minnesota, with the greatest concentrations from the Twin Cities southward. Forecasts call for at least an inch of rain across most of the state, and isolated pockets of 2-3 inches—or more—where the rain shield lingers longest.
Background & Context: Tropical Pacific Moisture Fuels Upper Midwest Storms
Historically, Minnesota’s heaviest rainfall events have been linked to fast-moving systems that draw mid- and upper-level moisture from tropical Pacific or Atlantic sources. Although the incoming system is not a classified tropical storm, its trajectory along the jet stream transports abundant moisture that can “waterlog the atmosphere,” setting the stage for intense precipitation when atmospheric dynamics force the moisture to condense.
Data & Statistics: Expected Rainfall Totals and Temperature Shifts
- Rainfall: Fox 9 projects 1–3 + inches statewide, with the Twin Cities south and eastward most likely to see 2–3 inches. KSTP’s meteorologist Ken Barlow notes that some southern locations could receive 3–4 inches.
- Temperatures: Thursday highs are expected in the mid-70s, feeling like Wednesday. The arriving storm will push temperatures down into the 60s for the remainder of the week, according to CBS Minnesota.
- Drought Context: The Minnesota Department of Natural Resources lists much of the state as experiencing drought ranging from “abnormally dry” to “extreme.” The forecasted rain could provide short-term moisture relief for vegetation before the dormant season, though officials caution it will not fully resolve the drought.
Official Statements & Responses: Meteorologists Warn of Flooding Risks
Ken Barlow (meteorologist, KSTP) cautions that the heavy rain could cause ponding water and slower traffic speeds, especially in Dakota and Scott counties where “some flooding is possible.” Fox 9’s weather team adds that the prior night’s rain on Wednesday may have softened compacted soils, allowing Friday’s precipitation to infiltrate more efficiently and potentially reducing flood risk. CBS Minnesota flags “isolated flooding” as a possibility for much of southern Minnesota, including the metro area.
Conflicting Reports & Gaps: Variation in Rainfall Estimates
- Rainfall Range: Fox 9 cites a maximum of 3 + inches, while KSTP’s Ken Barlow mentions potential totals of 3–4 inches in the same southern corridor.
- Flooding Outlook: CBS Minnesota describes flooding as “possible,” whereas Fox 9 suggests that Wednesday’s pre-moistening could mitigate severe runoff. No source provides definitive flood-plain modeling, leaving uncertainty about the exact impact on low-lying areas.
What’s Next: Outlook for the Weekend
The forecast calls for mostly dry conditions Saturday, with only a lingering shower possible early in the day. Sunday is expected to be partly sunny and cool, with temperatures in the upper 60s to low 70s. Early next week should see a return to comfortable daytime highs in the low 70s.