Alert archive / Michigan / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 706

August 9, 20059 counties in Michigan

The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2005, 10:30 AM EDT for 9 counties in Michigan. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 9, 2005, 10:30 AM EDT (14:30 UTC)
Expired
Aug 9, 2005, 4:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Alger County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Delta County, MI, Emmet County, MI, Luce County, MI, Mackinac County, MI, Schoolcraft County, MI

The radar

The Marquette radar (KMQT), 135 km from the middle of the area, began a volume at 14:32 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

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

IssuedProductOfficeCountiesLasted
Aug 9, 11:35 AM EDTSevere Thunderstorm WarningMQTDelta70 min
Aug 9, 11:46 AM EDTSevere Thunderstorm WarningMQTAlger89 min
Aug 9, 12:15 PM EDTSevere Thunderstorm WarningMQTSchoolcraft60 min
Aug 9, 12:19 PM EDTSevere Thunderstorm WarningAPXChippewa41 min
Aug 9, 12:54 PM EDTSevere Thunderstorm WarningAPXMackinac81 min
Aug 9, 12:59 PM EDTSevere Thunderstorm WarningMQTLuce61 min
Aug 9, 1:07 PM EDTSevere Thunderstorm WarningMQTSchoolcraft23 min
Aug 9, 1:33 PM EDTSevere Thunderstorm WarningAPXChippewa78 min
Aug 9, 2:10 PM EDTSevere Thunderstorm WarningAPXMackinac41 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 2.5 hours before the alert went out and 262 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, Green Bay/Straub, WI at 12:00Z on 2005-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1641 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, Green Bay/Straub, WI at 12:00Z on 2005-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.193958Sfc1 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
1641 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
1095 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 6:05 AM EDTMesoscale DiscussionSPCGogebic, Ontonagon115 min
Aug 9, 6:45 AM EDTSevere Thunderstorm WatchSPCDickinson, Gogebic, Iron, Menominee5 hr
Aug 9, 10:10 AM EDTMesoscale DiscussionSPCAlger, Charlevoix, Cheboygan, Chippewa, Delta, Emmet and 3 more95 min
Aug 9, 2:45 PM EDTSevere Thunderstorm WatchSPCMenominee7 hr

Nearby

Severe Thunderstorm Watches in Michigan, 2005Every severe thunderstorm watch in 2005

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.