Alert archive / Michigan / Tornado Watches in 2004
Tornado Watch 582
The Storm Prediction Center issued this tornado watch at Jul 6, 2004, 6:15 PM EDT for 29 counties in Michigan. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 6, 2004, 6:15 PM EDT (22:15 UTC)
- Expired
- Jul 7, 2004, 1:00 AM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 29 counties
Barry County, MI, Bay County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Midland County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI
The radar
The Detroit radar (KDTX), 86 km from the middle of the area, began a volume at 22:12 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.
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 7:27 PM EDT | Severe Thunderstorm Warning | GRR | Kalamazoo | 63 min |
| Jul 6, 8:24 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 36 min |
| Jul 6, 9:05 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 70 min |
| Jul 6, 9:43 PM EDT | Severe Thunderstorm Warning | DTX | Genesee | 32 min |
| Jul 6, 10:05 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer | 55 min |
| Jul 6, 10:30 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 30 min |
| Jul 7, 12:03 AM EDT | Severe Thunderstorm Warning | IWX | Hillsdale | 42 min |
| Jul 7, 12:08 AM EDT | Severe Thunderstorm Warning | DTX | Livingston | 52 min |
| Jul 7, 12:21 AM EDT | Severe Thunderstorm Warning | GRR | Jackson | 24 min |
| Jul 7, 12:24 AM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 66 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 10.3 hours before the alert went out and 89 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 704 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 153 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 062212
SEL2
SPC WW 062215
MIZ000-LHZ000-070500-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 582
NWS STORM PREDICTION CENTER NORMAN OK
615 PM EDT TUE JUL 6 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN AND PART OF CENTRAL LOWER MICHIGAN
LAKE HURON
EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 615 PM
UNTIL 100 AM EDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES SOUTHEAST OF KALAMAZOO MICHIGAN TO 60
MILES EAST NORTHEAST OF SAGINAW MICHIGAN.
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 578...WW 579...WW 580...WW
581...
DISCUSSION...THUNDERSTORMS EXPECTED TO DEVELOP QUICKLY ACROSS WW
DURING THE NEXT HOUR OR SO...WITH SUFFICIENT SHEAR AND INSTABILITY
FOR SUPERCELLS. PRIMARY THREATS WILL BE FROM LARGE HAIL AND
DAMAGING WINDS. HOWEVER...BACKED/SLY LOW LEVEL FLOW WILL ENHANCE
THE POTENTIAL FOR A FEW TORNADOES ACROSS ERN PORTION OF WW.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 26020.
...EVANS
415,0863 435,0843 435,0812 415,0833SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 2:45 AM EDT | Severe Thunderstorm Watch | SPC | Berrien | 5 hr |
| Jul 6, 3:53 PM EDT | Mesoscale Discussion | SPC | Berrien, Branch, Cass, Saint Joseph | 37 min |
| Jul 6, 5:34 PM EDT | Mesoscale Discussion | SPC | Allegan, Arenac, Barry, Bay, Branch, Calhoun and 37 more | 86 min |
Nearby
Tornado Watches in Michigan, 2004Every tornado watch in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.