Alert archive / Michigan / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 13, NWS Detroit, MI

May 9, 2000Macomb County, Wayne County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 9, 2000, 7:59 PM EDT for Macomb County, Wayne County, Michigan. It was in force for 46 min. 6 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, 7:59 PM EDT (23:59 UTC)
Expired: May 9, 2000, 8:45 PM EDT
In force: 46 min
Issued by: NWS Detroit, MI
Area: Whole counties

Counties Macomb County, MI, Wayne County, MI

The radar

The Detroit radar (KDTX), 40 km from the middle of the area, began a volume at 00:06 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
May 9, 8:05 PM EDT	Hail 1.75	Detroit, MI
May 9, 8:33 PM EDT	Hail 1.75	Plymouth, MI
May 9, 8:33 PM EDT	Thunderstorm Wind 60 E	Plymouth, MI
May 9, 8:45 PM EDT	Thunderstorm Wind 60 E	Belleville, MI
May 9, 8:49 PM EDT	Thunderstorm Wind 55 E	Garden City, MI
May 9, 8:55 PM EDT	Thunderstorm Wind 60 E	Flat Rock, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 9, 6:30 PM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 12.0 hours before the alert went out and 39 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1010 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 224 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDTX 092359
SVRDTX
MIC099-163-100045-

BULLETIN - EAS ACTIVATION/IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
759 PM EDT TUE MAY 9 2000

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WAYNE COUNTY IN SOUTHEAST MICHIGAN
  MACOMB COUNTY IN SOUTHEAST MICHIGAN

* UNTIL 845 PM EDT

* AT 758 PM EDT...A TRAINED WEATHER SPOTTER REPORTED A SEVERE   
  THUNDERSTORM NEAR DOWNTOWN DETROIT...MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GROSSE POINTE SHORES AT 805 PM EDT
  FRASER...ST. CLAIR SHORES AT 810 PM EDT
  MOUNT CLEMENS AT 820 PM EDT

A TORNADO WATCH IS ALSO IN EFFECT. REMEMBER...TORNADOES CAN AND
OCCASIONALLY DO DEVELOP RAPIDLY IN SEVERE THUNDERSTORMS. IF
THREATENING WEATHER IS OBSERVED...MOVE TO SAFE SHELTER IMMEDIATELY.

THIS STORM HAS THE POTENTIAL OF PRODUCING HAIL UP TO GOLF BALL?
SIZE...OR ONE AND THREE FOURTHS INCHES IN DIAMETER. HAIL OF THIS SIZE
IS CAPABLE OF BREAKING WINDOWS...AND DAMAGING ALUMINUM SIDING AND
VEHICLES. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

WAG JZ

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, 4:04 AM EDT	Severe Thunderstorm Warning	DTX	Macomb, Saint Clair	26 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

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.