Alert archive / Michigan / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 9, NWS Detroit, MI

May 9, 2000Macomb County, Saint Clair County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 9, 2000, 4:04 AM EDT for Macomb County, Saint Clair County, Michigan. It was in force for 26 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 9, 2000, 4:04 AM EDT (08:04 UTC)
Expired: May 9, 2000, 4:30 AM EDT
In force: 26 min
Issued by: NWS Detroit, MI
Area: Whole counties

Counties Macomb County, MI, Saint Clair County, MI

The radar

The Detroit radar (KDTX), 57 km from the middle of the area, began a volume at 08:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 9, 4:10 AM EDT	Thunderstorm Wind 55 E	St Clair Shrs, MI
May 9, 4:25 AM EDT	Thunderstorm Wind 52 E	Algonac, MI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 8.1 hours before the alert went out and 53 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 876 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1484 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KDTX 090810
SVRDTX
MIC099-147-090830-

BULLETIN - EAS ACTIVATION/IMMEDIATE BROADCAST REQUESTED 
SEVERE THUNDERSTORM WARNING...RETRANSMITTED
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
404 AM EDT TUE MAY 9 2000

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACOMB COUNTY IN SOUTHEAST MICHIGAN
  ST. CLAIR COUNTY IN SOUTHEAST MICHIGAN

* UNTIL 430 AM EDT

* AT 404 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHEAST OF MACOMB TOWNSHIP...OR 8
  MILES NORTH OF MOUNT CLEMENS...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RICHMOND AT 415 AM EDT
  FAIR HAVEN AT 415 AM EDT
  ADAIR AT 420 AM EDT
  MARINE CITY...ST. CLAIR AT 425 AM EDT

THIS STORM IS CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER.
HAIL OF THIS SIZE MAY DAMAGE WINDOWS...ALUMINUM SIDING...OR
VEHICLES...IF ACCOMPANIED BY STRONG WIND GUSTS. STAY INSIDE AWAY FROM
WINDOWS UNTIL THE STORM HAS PASSED.

MANN STRUBLE

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 9, 12:05 AM EDT	Severe Thunderstorm Warning	DTX	Huron	40 min
May 9, 12:44 AM EDT	Severe Thunderstorm Warning	DTX	Midland	31 min
May 9, 1:34 AM EDT	Severe Thunderstorm Warning	DTX	Huron	41 min
May 9, 2:21 AM EDT	Severe Thunderstorm Warning	DTX	Genesee, Shiawassee	39 min
May 9, 3:48 AM EDT	Severe Thunderstorm Warning	DTX	Wayne	27 min
May 9, 6:49 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	41 min
May 9, 6:57 PM EDT	Severe Thunderstorm Warning	DTX	Monroe, Wayne	63 min
May 9, 7:25 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee	35 min
May 9, 7:39 PM EDT	Tornado Warning	DTX	Lenawee, Washtenaw	66 min
May 9, 7:59 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Wayne	46 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.