Storm Events Database
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Storm Events Database
Event Details:
| Event | Tornado |
| -- Scale | EF2 |
| -- Length | 0.75 Miles |
| -- Width | 230 Yards |
| State | WISCONSIN |
| County/Area | MARATHON |
| WFO | GRB |
| Report Source | NWS Storm Survey |
| NCEI Data Source | CSV |
| Begin Date | 2025-05-15 16:27 CST-6 |
| Begin Location | 2SSW COLBY |
| Begin Lat/Lon | 44.898/-90.315 |
| End Date | 2025-05-15 16:28 CST-6 |
| End Location | 1S COLBY |
| End Lat/Lon | 44.9053/-90.3038 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 0.00K |
| Crop Damage | 0.00K |
| Episode Narrative | Showers and thunderstorms developed ahead of an occluded front Thursday afternoon (5/15) across western Wisconsin. Storms tracked through the area during the late afternoon and early evening hours. The strongest storms produced 3 tornadoes, damaging winds, and large hail up to golf ball size across central and north-central Wisconsin. |
| Event Narrative | A tornado developed in fields west of Unity in Clark County (NWS La Crosse warning area) at 5:21 pm CDT before tracking northeast toward Colby. The tornado moved through rural areas of northeastern Clark County, damaging multiple farm outbuildings, trees, power poles, and a home before crossing Highway 13 into western Marathon County at 5:27 pm CDT. The tornado tracked through the southeastern edge of Colby damaging another home, multiple outbuildings, power poles, and a car dealership before dissipating at 5:28 pm CDT. Total path length is estimated to be 4.81 miles long, with a width of 230 yards. Peak wind estimated to be around 120 mph. |
Event Map:
Note: The tornado track is approximate based on the beginning (B) and ending (E) locations. The actual tornado path may differ from a straight line.All events for this episode:
| Location | County/Zone | St. | Date | Time | T.Z. | Type | Mag | Dth | Inj | PrD | CrD |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals: | 0 | 0 | 0.00K | 0.00K | |||||||
| KELLNER | PORTAGE CO. | WI | 05/15/2025 | 15:37 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| COLBY | MARATHON CO. | WI | 05/15/2025 | 16:27 | CST-6 | Tornado | EF2 | 0 | 0 | 0.00K | 0.00K |
| RIB FALLS | MARATHON CO. | WI | 05/15/2025 | 16:41 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 0.00K |
| BANCROFT | PORTAGE CO. | WI | 05/15/2025 | 16:52 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 0.00K |
| CODDINGTON | PORTAGE CO. | WI | 05/15/2025 | 17:06 | CST-6 | Hail | 1.50 in. | 0 | 0 | 0.00K | 0.00K |
| ROTHSCHILD | MARATHON CO. | WI | 05/15/2025 | 17:10 | CST-6 | Hail | 1.75 in. | 0 | 0 | 0.00K | 0.00K |
| SCHOFIELD | MARATHON CO. | WI | 05/15/2025 | 17:15 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| SCHOFIELD | MARATHON CO. | WI | 05/15/2025 | 17:20 | CST-6 | Hail | 1.25 in. | 0 | 0 | 0.00K | 0.00K |
| MERRILL MUNI ARPT | LINCOLN CO. | WI | 05/15/2025 | 17:21 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| WAUSAU | MARATHON CO. | WI | 05/15/2025 | 17:45 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| HARSHAW | ONEIDA CO. | WI | 05/15/2025 | 17:49 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| LAKE EMILY | PORTAGE CO. | WI | 05/15/2025 | 17:50 | CST-6 | Hail | 1.50 in. | 0 | 0 | 0.00K | 0.00K |
| Totals: | 0 | 0 | 0.00K | 0.00K |
