Hail, Washtenaw
- When
- May 25, 3:41 PM EST
- Where
- Washtenaw County, Pittsfield
- Measured
- 0.88 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.200, -83.717
A low pressure system in the upper levels of the atmosphere was anchored over the western Great Lakes. This system kept cold air aloft over the region, producing an environment conducive to hail-producing storms.
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 DTX wrote it up.
A low pressure system in the upper levels of the atmosphere was anchored over the western Great Lakes. This system kept cold air aloft over the region, producing an environment conducive to hail-producing storms. Thunderstorms developed in southeast Michigan during the afternoon, some of which produced marginally severe hail as they moved north. One storm also produced wind damage; several other storms produced non-severe wind gusts up to 50 mph.
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 Detroit, MI wrote its last area forecast discussion before the first event at May 25, 2:35 PM EST, 1 hour 6 minutes earlier.
SOUTHEAST MICHIGAN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 335 PM EDT FRI MAY 25 2001 NEXT LOBE ROTATING AROUND UPPER LOW IN NORTHERN INDIANA IS BRINGING WIDESPREAD SHOWERS AND THUNDERSTORMS TO THE CWA LATE THIS AFTERNOON. THESE SHOULD CONTINUE WELL INTO THE EVENING HOURS BUT WEAKEN CONSIDERABLY AS WE APPROACH MIDNIGHT. ENOUGH FORCING LAYING AROUND THOUGH TO KEEP A FEW SHOWERS GOING PAST THE MIDNIGHT TIME FRAME. OUTSIDE OF THAT... MODELS ARE IN VIRTUAL AGREEMENT ON STACKED LOW REMAINING/MEANDERING OVER THE REGION WITH ONE IMPULSE AFTER ANOTHER PINWHEELING AROUND THE LOW. IN SHORT... THERE WILL BE PERIODS OF RAIN... WITH BRIEF INTERVALS WITH BREEAKS IN CLOUD COVER... AND A LOT OF PERSISTENCE. PREFER WETTER AVN POPS AND COOLER AVN TEMPS GIVEN THE BIG SLUG OF DEEPER MOISTER THE MODELS LOCK IN PLACE OVER THE STATE. .DTX...NONE.
The Detroit radar (KDTX), 59 km away, was scanning. The volume nearest the first event began at 20:42 UTC.
5 hail, 1 thunderstorm wind. Local standard time, as filed.
A thunderstorm wind gust destroyed a barn, flinging the metal roof into a neighbor's yard. A boat and furniture inside the barn were damaged.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2001Every state in 2001This day in weather historyWarnings in Michigan, May 2001
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: 5244501, 5244503, 5244502, 5244505, 5244504, 5244506.