Alert archive / Michigan / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 890

August 26, 200313 counties in Michigan

The Storm Prediction Center issued this severe thunderstorm watch at Aug 26, 2003, 6:00 AM EDT for 13 counties in Michigan. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Aug 26, 2003, 6:00 AM EDT (10:00 UTC)
Expired
Aug 26, 2003, 10:00 AM EDT
In force
4 hr
Issued by
the Storm Prediction Center

Counties Alpena County, MI, Antrim County, MI, Charlevoix County, MI, Cheboygan County, MI, Crawford County, MI, Emmet County, MI, Grand Traverse County, MI, Kalkaska County, MI, Leelanau County, MI, Montmorency County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Aug 26, 6:20 AM EDTSevere Thunderstorm WarningAPXAntrim, Charlevoix, Emmet, Leelanau70 min
Aug 26, 7:06 AM EDTSevere Thunderstorm WarningAPXCheboygan, Otsego64 min
Aug 26, 7:28 AM EDTSevere Thunderstorm WarningAPXMontmorency, Presque Isle62 min
Aug 26, 7:47 AM EDTSevere Thunderstorm WarningAPXAlpena43 min
Aug 26, 7:55 AM EDTSevere Thunderstorm WarningAPXAlpena35 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 00:00Z, 10.0 hours before the alert went out and 256 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 00:00Z on 2003-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 272 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 00:00Z on 2003-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 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
272 J/kg
Mixed-layer CIN
-178 J/kg
Mixed-layer LCL
1459 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 11:02 PM EDTMesoscale DiscussionSPCGogebic58 min
Aug 26, 12:27 AM EDTMesoscale DiscussionSPCMonroe, Wayne63 min
Aug 26, 2:35 AM EDTMesoscale DiscussionSPCClare, Gladwin, Isabella, Lake, Mecosta, Midland and 3 more85 min
Aug 26, 3:49 AM EDTMesoscale DiscussionSPCAllegan, Barry, Branch, Calhoun, Cass, Clinton and 12 more116 min
Aug 26, 5:41 AM EDTMesoscale DiscussionSPCAntrim, Cheboygan, Crawford, Emmet, Montmorency, Oscoda and 1 more94 min
Aug 26, 7:47 AM EDTMesoscale DiscussionSPCAlpena, Crawford, Montmorency, Oscoda, Presque Isle58 min
Aug 26, 9:10 AM EDTSevere Thunderstorm WatchSPCMonroe5 hr
Aug 26, 2:15 PM EDTSevere Thunderstorm WatchSPCBerrien, Branch, Cass, Saint Joseph4 hr

Nearby

Severe Thunderstorm Watches in Michigan, 2003Every severe thunderstorm watch in 2003

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.