Alert archive / Michigan / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 18, NWS Marquette, MI

May 12, 2004Dickinson County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at May 12, 2004, 6:48 PM CDT for Dickinson County, Michigan. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 12, 2004, 6:48 PM CDT (23:48 UTC)
Expired: May 12, 2004, 7:45 PM CDT
In force: 57 min
Issued by: NWS Marquette, MI
Area: Whole counties

County Dickinson County, MI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.8 hours before the alert went out and 171 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: 127 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1117 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Marquette, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at May 12, 4:10 PM CDT, 2 hours 38 minutes earlier.

Area forecast discussion, May 12, 4:10 PM CDT, 2 hours 38 minutes before

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Hazardous weather outlook, May 12, 4:50 PM CDT, 1 hour 58 minutes before

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In the hours before

Local storm report, May 12, 4:29 PM CDT, 2 hours 19 minutes before

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Local storm report, May 12, 5:38 PM CDT, 1 hour 10 minutes before

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Special weather statement, May 12, 6:20 PM CDT, 28 minutes before

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The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 12, 4:05 PM CDT	Severe Thunderstorm Warning	MQT	Ontonagon	40 min
May 12, 5:02 PM CDT	Severe Thunderstorm Warning	MQT	Baraga	28 min
May 12, 5:06 PM CDT	Special Marine Warning	MQT		39 min
May 12, 5:06 PM CDT	Special Marine Warning	MQT		39 min
May 12, 5:43 PM CDT	Severe Thunderstorm Warning	MQT	Baraga	47 min
May 12, 5:54 PM CDT	Severe Thunderstorm Warning	MQT	Marquette	66 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2004 Every severe thunderstorm warning 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.