Hail in Michigan, April 9, 2001

Name: Hail in Michigan, April 9, 2001
Start: 2001-04-09T07:46
End: 2001-04-09T10:45
Location: Michigan

April 9, 2001 · NWS DTX · 13 events in 7 counties and zones

A stationary front lay west-to-east across northern Indiana and Ohio. Temperatures north of the front in southeast Michigan were only in the 40s.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 13

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.

What happened

The episode as NWS DTX wrote it up.

A stationary front lay west-to-east across northern Indiana and Ohio. Temperatures north of the front in southeast Michigan were only in the 40s. Despite this, warm moist air poured into the region aloft, providing a source of elevated instability. A cluster of showers and thunderstorms strengthened as it moved east into southeast Michigan during the morning. A number of these produced large hail, making for an unusually chilly severe weather episode.

What forecasters said that day

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 9, 3:25 AM EST, 4 hours 21 minutes earlier.

Area forecast discussion, Apr 9, 3:25 AM EST, 4 hours 21 minutes before

SOUTHEAST MICHIGAN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
425 AM EDT MON APR 9 2001

DUE TO SEVERE WEATHER IN THE CWA...THIS AFD WILL BE BRIEF...SORRY

INITIAL BAROCLINIC BOUNDARY IS MOVING SLOWLY NORTHEAST ACROSS THE
CWA.  MODELS TAKE MCS ACROSS THE CWA THIS MORNING.  FLASH FLOOD
GUIDANCE VALUES COMPARED TO QPF SHOULD KEEP THINGS IN LINE.
ALTHOUGH...STILL MENTIONED HEAVY RAINFALL IN ZONES.  WILL HAVE TO BE
WATCHED.

SHOULD GET A DECENT SUBSTANCE BEHIND DEPARTING MCS THIS AFTERNOON.
WITH NORTHEAST FLOW OFF LAKE HURON...EXPECT COOLER TEMPS COUNTIES
THERE.

THEN WAVE OVER THE PLAINS BEGINS TO PUSH EAST.  STILL NOT CERTAIN
ABOUT POPS TONIGHT BUT WHERE BETTER CONVERGENCE IS WILL BE NEAR THE
BORDER.  WITH TT/S ABOVE 50 AND THE POTENTIAL OF MORE ELEVATED
CONVECTION...STILL WILL LEAVE THE MENTION OF STORMS SOUTH AND NORTH
1/3 AND NEAR LAKE HURON JUST SHOWERS.

DRYING TAKES PLACE TUESDAY BEFORE WE MAY BE DOING THIS ALL OVER
AGAIN TUESDAY NIGHT AND WEDNESDAY AS NEXT SYSTEM IN THE PLAINS
DEVELOPS.

ZONES BY 445 AM (HOPEFULLY).

THANKS FOR THE COORD GRR AND APX

.DTX...NONE.

BGM

In the hours before

Special weather statement, Apr 9, 2:40 AM EST, 5 hours 6 minutes before

MIZ047>049-053>055-060>063-068>070-075-076-082-083-091400-

SEVERE WEATHER OUTLOOK FOR SOUTHEAST LOWER MICHIGAN
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
340 AM EDT MON APR 9 2001

...SEVERE WEATHER POTENTIAL STATEMENT FOR SOUTHEAST MICHIGAN...

DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY.

THUNDERSTORMS WILL OCCUR ACROSS MOST OF SOUTHEAST MICHIGAN EARLY
THIS MORNING. A FEW STORMS COULD BECOME SEVERE...PRODUCING
MARGINALLY SEVERE HAIL. DUE TO THE ISOLATED NATURE OF THE SEVERE
THUNDERSTORMS...SPOTTER ACTIVATION IS NOT BEING REQUESTED AT THIS
TIME.

A COMPLEX OF THUNDERSTORMS WAS MOVING EAST ACROSS LOWER MICHIGAN
EARLY THIS MORNING. MORE THUNDERSTORMS WERE LOCATED FURTHER
WEST...JUST WEST OF LAKE MICHIGAN AS OF 330 AM. THESE STORMS WERE
MOVING EAST AT 35 MPH...AND WILL MOVE ACROSS THE AREA EARLY THIS
MORNING. HAIL UP TO ONE INCH IN DIAMETER IS POSSIBLE WITH THE VERY
STRONGEST STORMS. MOST STORMS WILL REMAIN BELOW SEVERE LEVELS...BUT
WILL STILL PRODUCE HEAVY DOWNPOURS AND DANGEROUS LIGHTNING.

STAY TUNED TO YOUR FAVORITE MEDIA OUTLET FOR THE LATEST WEATHER
INFORMATION FROM THE NATIONAL WEATHER SERVICE.

ZOLTOWSKI

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

13 hail. Local standard time, as filed.

Hail, Genesee

When: April 9, 7:46 AM EST
Where: Genesee County, Fenton
Measured: 0.75 in hail
Reported by: TRAINED SPOTTER
Coordinates: 42.800, -83.700

Hail, Lenawee

When: April 9, 9:05 AM EST to 9:11 AM EST
Where: Lenawee County, 4 mi N of Adrian
Measured: 1.25 in hail
Reported by: GENERAL PUBLIC
Coordinates: 41.950, -84.033

Hail, Washtenaw

When: April 9, 9:11 AM EST
Where: Washtenaw County, Manchester
Measured: 1.75 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 42.150, -84.033

Hail, Washtenaw

When: April 9, 9:15 AM EST
Where: Washtenaw County, 3 mi N of Dexter
Measured: 0.75 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 42.383, -83.867

Hail, Washtenaw

When: April 9, 9:22 AM EST to 9:27 AM EST
Where: Washtenaw County, Saline
Measured: 1.75 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 42.167, -83.767

Hail, Monroe

When: April 9, 9:25 AM EST
Where: Monroe County, Cone
Measured: 1.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 42.033, -83.750

Hail, Washtenaw

When: April 9, 9:30 AM EST to 9:40 AM EST
Where: Washtenaw County, Ann Arbor
Measured: 1.75 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 42.283, -83.733

Hail, Washtenaw

When: April 9, 9:45 AM EST
Where: Washtenaw County, Salem
Measured: 0.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 42.400, -83.567

Hail, Wayne

When: April 9, 9:45 AM EST to 9:50 AM EST
Where: Wayne County, Belleville
Measured: 3.5 in hail
Reported by: GENERAL PUBLIC
Coordinates: 42.200, -83.467

Hail, Wayne

When: April 9, 10:00 AM EST
Where: Wayne County, Dearborn
Measured: 0.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 42.317, -83.250

Hail, Macomb

When: April 9, 10:28 AM EST
Where: Macomb County, Warren
Measured: 0.75 in hail
Reported by: TRAINED SPOTTER
Coordinates: 42.517, -83.000

Hail, Oakland

When: April 9, 10:35 AM EST
Where: Oakland County, Southfield
Measured: 0.75 in hail
Reported by: BROADCAST MEDIA
Coordinates: 42.467, -83.283

Hail, Macomb

When: April 9, 10:45 AM EST
Where: Macomb County, Roseville
Measured: 0.75 in hail
Reported by: TRAINED SPOTTER
Coordinates: 42.500, -82.900

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Michigan in 2001 Every state in 2001 This day in weather history Warnings in Michigan, April 2001

Sources

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: 5241030, 5241031, 5241032, 5241034, 5241035, 5241037, 5241036, 5241033, 5241121, 5241122, 5241039, 5241038, 5241040.