Alert archive / Michigan / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 28, NWS Detroit, MI

May 30, 2013Bay County, Saginaw County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 30, 2013, 4:20 PM EDT for Bay County, Saginaw County, Michigan. It was in force for 55 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 30, 2013, 4:20 PM EDT (20:20 UTC)
Expired: May 30, 2013, 5:15 PM EDT
In force: 55 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bay County, MI, Saginaw County, MI

The radar

The Detroit radar (KDTX), 101 km from the middle of the area, began a volume at 20:21 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.3 hours before the alert went out and 101 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: 226 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1346 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 54 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 Detroit, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at May 30, 3:53 PM EDT, 27 minutes earlier.

Area forecast discussion, May 30, 3:53 PM EDT, 27 minutes before

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Hazardous weather outlook, May 30, 4:09 PM EDT, 11 minutes before

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In the hours before

Local storm report, May 30, 3:40 PM EDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
340 PM EDT THU MAY 30 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0228 PM     TSTM WND DMG     1 SSW PONTIAC           42.63N 83.29W
05/30/2013                   OAKLAND            MI   TRAINED SPOTTER

            COUPLE POWER POLES SNAPPED...LAW ENFORCEMENT IS ON THE
            SCENE.

&&

RKULIK

Local storm report, May 30, 3:42 PM EDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
342 PM EDT THU MAY 30 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0305 PM     TSTM WND DMG     4 WSW MACOMB TOWNSHIP   42.66N 82.99W
05/30/2013                   MACOMB             MI   TRAINED SPOTTER

            2 TREES DOWN NEAR 22 MILE AND SCHOENHERR IN SHELBY
            TOWNSHIP

&&

DTHOMPSON

Special weather statement, May 30, 3:54 PM EDT, 26 minutes before

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Special weather statement, May 30, 4:08 PM EDT, 12 minutes before

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Special weather statement, May 30, 4:11 PM EDT, 9 minutes before

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Special weather statement, May 30, 4:16 PM EDT, 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 3:34 AM EDT	Marine Dense Fog Advisory	DTX		8 hr
May 30, 2:19 PM EDT	Special Marine Warning	DTX		56 min
May 30, 2:26 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Oakland	49 min
May 30, 2:50 PM EDT	Severe Thunderstorm Warning	DTX	Saint Clair	70 min
May 30, 2:57 PM EDT	Special Marine Warning	DTX		108 min
May 30, 3:15 PM EDT	Severe Thunderstorm Warning	DTX	Midland	75 min
May 30, 4:27 PM EDT	Special Marine Warning	DTX		108 min
May 30, 5:01 PM EDT	Special Marine Warning	DTX		104 min
May 30, 5:10 PM EDT	Severe Thunderstorm Warning	DTX	Macomb, Oakland	50 min
May 30, 5:36 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Genesee, Saginaw, Tuscola	69 min
May 30, 5:56 PM EDT	Severe Thunderstorm Warning	DTX	Huron	79 min
May 30, 6:03 PM EDT	Special Marine Warning	DTX		117 min
May 30, 6:23 PM EDT	Special Marine Warning	DTX		82 min
May 30, 7:10 PM EDT	Special Marine Warning	DTX		95 min
May 30, 7:29 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw	76 min
May 30, 7:41 PM EDT	Special Marine Warning	DTX		2 hr
May 30, 7:55 PM EDT	Severe Thunderstorm Warning	DTX	Bay	80 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2013 Every severe thunderstorm warning in 2013

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.