1 hail, as filed by the National Weather Service.
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 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 Apr 7, 2:15 PM EST, 2 hours 57 minutes earlier.
SOUTHEAST MICHIGAN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 315 PM EDT SAT APR 7 2001 WARM FRONT IS MOVING SLOWLY NORTHWARD ACROSS SOUTHEAST MICHIGAN. MSAS DATA IS SHOWING GOOD LOW LEVEL CONVERGENCE JUST ON THE NORTH SIDE OF THE FRONT. PAST COUPLE HOURS THE BETTER CONVERGENCE HAS BEEN SHIFTING TO THE WEST AND NORTHWEST... CLOSER TO THE TRIPLE POINT. WEAK COLD FRONT/TROF WILL MOVE ACROSS SOUTHEAST MICHIGAN TONIGHT. VERY LITTLE LOW LEVEL CONVERGENCE ALONG THIS FRONT. HOWEVER... ETA IS SHOWING CAPE OF APPROXIMATELY 2K PASSING OVER SOUTHEAST MICHIGAN THIS EVENING AHEAD OF THE FRONT ALONG WITH A LIFTED INDEX OF AROUND MINUS 6. EVEN THOUGH THERE IS NOT REAL OBVIOUS TRIGGER TO GET THE THUNDERSTORMS GOING TONIGHT SOUTH OF THE WARM FRONT... I FEEL VERY UNCOMFORTABLE ABOUT LEAVING THE MENTION OF THUNDERSTORMS OUT OF THE FORECAST WITH THAT AMOUNT OF INSTABILITY AROUND. WILL... THEREFORE... HAVE A CHANCE OF THUNDERSTORMS FOR THIS EVENING FOR ALL OF SOUTHEAST MICHIGAN. DRY AIR MOVES INTO MOST OF THE REGION TONIGHT AND THE SKY SHOULD BECOME PARTLY CLOUDY. ONLY AREA THAT MAY STAY MOSTLY CLOUDY WILL BE IN THE COUNTIES FROM THE SAGINAW/MIDLAND/BAY CITY AREA OVER TO THE TIP OF THE THUMB. NICE DAY ACROSS THE FORECAST AREA ON SUNDAY. MODEL SOUNDINGS SHOW VERY LITTLE LOW LEVEL MOISTURE ACROSS THE SOUTHERN COUNTIES WITH THE CU FORECAST SCHEME POINTING TO MOSTLY SUNNY IN THE SOUTH AND PARTLY SUNNY NORTH. ANOTHER WARM FRONT MOVES BACK TO THE NORTH SUNDAY NIGHT AND A LOW PRESSURE SYSTEM BEGINS TO MOVE NORTHEAST OUT OF THE PLAINS. NICE UPPER LEVEL DIVERGENCE/LOW LEVEL CONVERGENCE COUPLET PASSES OVER SOUTHEAST MICHIGAN LATE SUNDAY NIGHT AND MONDAY MORNING. COMBINE THIS WITH GOOD THETA-E ADVECTION AND IT LOOKS LIKE A PRETTY GOOD BET THAT THERE WILL BE SOME SHOWERS AND THUNDERSTORMS OVER THE FORECAST AREA. THIS PRECIPITATION WILL CONTINUE INTO MONDAY MORNING AND THEN THERE SHOULD BE A BREAK UNTIL LATE IN THE DAY MORNING... WHEN ANOTHER WAVE APPROACHES FROM THE WEST. PRESENTLY BOTH THE ETA AND THE AVN SHOW THE WARM FRONT BECOMING STATIONARY OVER THE SOUTHERN COUNTIES MONDAY. LOTS OF INSTABILITY SOUTH OF THE FRONT WITH CAPE PREDICTED TO BE AROUND 3K AND THE LIFTED INDEX AROUND MINUS 9. NEEDLESS TO SAY FRONTAL POSITION WILL BE CRITICAL FOR THE MONDAY NIGHT FORECAST. AT THIS POINT WILL HAVE A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE FORECAST FOR MONDAY NIGHT. FOR THE EXTENDED... SEVERAL CHOICES FOR THE EXTENDED PERIOD WITH MODELS ALL HAVING DIFFERENT SOLUTIONS. MRF AND CANADIAN BOTH QUITE WET FOR THE COMING WEEK... BUT DIFFER IN THE TIMING OF THE PRECIPITATION PATTERNS. LOCALLY RUN ETA-XX IS LEANING MORE TOWARDS THE CANADIAN SOLUTION. ONCE THE SHOWERS END LATE MONDAY NIGHT OR TUESDAY MORNING IT KEEPS SOUTHEAST MICHIGAN DRY UNTIL THE NEXT WAVE MOVES JUST SOUTH OF THE THE STATE WEDNESDAY NIGHT AND THURSDAY. AT THIS POINT THIS LOOKS REASONABLE AND WILL BE FOLLOWED. .DTX...NONE. KEYES
MIZ047>049-053>055-060>063-068>070-075-076-082-083-081200- SEVERE WEATHER OUTLOOK FOR SOUTHEAST MICHIGAN NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 100 PM EDT SAT APR 7 2001 ...SEVERE WEATHER POTENTIAL STATEMENT FOR SOUTHEAST MICHIGAN... DISPATCHERS... PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. THERE IS A CHANCE OF THUNDERSTORMS OVER ALL OF SOUTHEAST MICHIGAN THIS EVENING AND EARLY NIGHT. THERE IS A SLIGHT CHANCE THAT ANY THUNDERSTORM THAT DID DEVELOP COULD BECOME SEVERE WITH THE POSSIBILITY OF WIND GUSTS TO 65 MPH. STORM MOTION WOULD BE TO THE NORTHEAST AT ABOUT 45 MPH. SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING. A WARM FRONT ALONG THE SOUTHERN MICHIGAN BORDER WILL BEGIN TO ACCELERATE NORTH DURING THE AFTERNOON AND SHOULD BE LOCATED ACROSS CENTRAL LOWER MICHIGAN LATE THIS EVENING OR EARLY NIGHT. THE ATMOSPHERE BEHIND THE FRONT WILL BECOME UNSTABLE TO WHERE ANY THUNDERSTORM DEVELOPMENT MAY BECOME SEVERE WITH DAMAGING WIND GUSTS POSSIBLE. THE CURRENT LACK OF TRIGGER MECHANISMS MAY KEEP THUNDERSTORM DEVELOPMENT LIMITED TO LITTLE IF ANY. DRC
The Detroit radar (KDTX), 96 km away, was scanning. The volume nearest the first event began at 22:11 UTC.
1 hail. Local standard time, as filed.
A few thunderstorms developed along the Lake Erie shoreline late in the afternoon. One of these produced penny sized hail in Luna Pier, just before moving out over the lake.
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, April 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: 5241029.