Severe Thunderstorm Warning for Jefferson County, WI
This alert is no longer in effect.
NOAA issued it on July 19, 2026, 5 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Milwaukee/Sullivan has issued a Severe Thunderstorm Warning for Jefferson County until 8:00 PM CDT due to 60 mph wind gusts and possible tornado.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Jefferson County, Wisconsin
- Issued
- July 19, 2026
- Issuing authority
- NWS Milwaukee/Sullivan WI
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: historical. It was issued 5 weeks ago; use the issuing agency's live warning service for current conditions in Jefferson County, Wisconsin.
Alert Details
Severe Thunderstorm Warning issued by NWS Milwaukee/Sullivan WI. Effective from 2026-06-17T19:23:00-05:00 until 2026-06-17T20:00:00-05:00. Severity: Severe. Urgency: Immediate. Certainty: Observed.
Affected Areas
Jefferson County in southeastern Wisconsin. Locations impacted include Whitewater, Fort Atkinson, Jefferson, Lake Mills, Johnson Creek, Palmyra, Cambridge, Lake Ripley, Lake Koshkonong, Rome, Hebron, Sullivan, Busseyville, Helenville, and Nws Milwaukee/sullivan.
What You Should Do
Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 723 PM CDT, severe thunderstorms were located along a line extending from near Lake Ripley to near Edgerton, moving east at 50 mph. Hazard: 60 mph wind gusts. Source: Radar indicated. Impact: Expect damage to roofs, siding, and trees. Max hail size up to .75 inches. Tornado detection: Possible.
Timeline
Alert effective 2026-06-17T19:23:00-05:00 and ends 2026-06-17T20:00:00-05:00.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,203 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to July 19, 2026.
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