Alert archive / Michigan / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 520

July 22, 200212 counties in Indiana; 22 counties in Michigan; 15 counties in Ohio

The Storm Prediction Center issued this severe thunderstorm watch at Jul 22, 2002, 12:10 PM EST for 12 counties in Indiana; 22 counties in Michigan; 15 counties in Ohio. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 22, 2002, 12:10 PM EST (17:10 UTC)
Expired
Jul 22, 2002, 6:00 PM EST
In force
6 hr
Issued by
the Storm Prediction Center
All 49 counties

Adams County, IN, Allen County, IN, DeKalb County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, Miami County, IN, Noble County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Bay County, MI, Branch County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Lucas County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Sandusky County, OH, Seneca County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Detroit radar (KDTX), 114 km from the middle of the area, began a volume at 17:14 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

16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 22, 3:45 PM ESTSevere Thunderstorm WarningDTXWashtenaw60 min
Jul 22, 4:03 PM ESTSevere Thunderstorm WarningDTXSaginaw42 min
Jul 22, 4:15 PM ESTSevere Thunderstorm WarningGRREaton60 min
Jul 22, 4:22 PM ESTSevere Thunderstorm WarningGRRCalhoun23 min
Jul 22, 4:26 PM ESTSevere Thunderstorm WarningDTXTuscola64 min
Jul 22, 4:28 PM ESTSevere Thunderstorm WarningDTXLivingston47 min
Jul 22, 4:28 PM ESTSevere Thunderstorm WarningDTXSanilac62 min
Jul 22, 4:40 PM ESTSevere Thunderstorm WarningDTXWashtenaw, Wayne50 min
Jul 22, 4:41 PM ESTSevere Thunderstorm WarningGRRIngham49 min
Jul 22, 5:05 PM ESTSevere Thunderstorm WarningDTXLapeer55 min
Jul 22, 5:06 PM ESTSevere Thunderstorm WarningDTXOakland39 min
Jul 22, 5:30 PM ESTSevere Thunderstorm WarningDTXSaint Clair60 min
Jul 22, 5:30 PM ESTSevere Thunderstorm WarningGRRJackson30 min
Jul 22, 5:37 PM ESTSevere Thunderstorm WarningIWXHillsdale38 min
Jul 22, 5:48 PM ESTSevere Thunderstorm WarningDTXWashtenaw57 min
Jul 22, 5:53 PM ESTSevere Thunderstorm WarningIWXMiami52 min

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 5.2 hours before the alert went out and 118 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2002-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1894 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2002-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1894 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
1192 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
-16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 2:30 PM ESTSevere Thunderstorm WatchSPCBenton, Boone, Carroll, Cass, Clinton, Fountain and 18 more6 hr

Nearby

Severe Thunderstorm Watches in Michigan, 2002Severe Thunderstorm Watches in Ohio, 2002Severe Thunderstorm Watches in Indiana, 2002Every severe thunderstorm watch in 2002

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.