Alert archive / Michigan / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 131, NWS Detroit, MI

July 30, 2006Sanilac County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 30, 2006, 3:03 PM EDT for Sanilac 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
Jul 30, 2006, 3:03 PM EDT (19:03 UTC)
Expired
Jul 30, 2006, 4:00 PM EDT
In force
57 min
Issued by
NWS Detroit, MI
Area
Counties, with a storm outline in the text

County Sanilac County, MI

The radar

The Detroit radar (KDTX), 106 km from the middle of the area, began a volume at 19:03 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 30, 9:27 AM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 7.1 hours before the alert went out and 103 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 2006-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 866 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 2006-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
866 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1156 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

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 Jul 30, 2:12 PM EDT, 51 minutes earlier.

Area forecast discussion, Jul 30, 2:12 PM EDT, 51 minutes before
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Hazardous weather outlook, Jul 30, 10:16 AM EDT, 4 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1016 AM EDT SUN JUL 30 2006

MIZ047>049-053>055-060>063-068>070-075-076-082-083-311000-
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER-
ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-
1016 AM EDT SUN JUL 30 2006

...SEVERE THUNDERSTORM WATCH 660 IN EFFECT UNTIL 500 PM EDT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF SOUTHEAST MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THE AFTERNOON. THERE
IS A CHANCE THAT SOME OF THESE THUNDERSTORMS COULD BE SEVERE...
WITH DAMAGING WIND GUSTS ABOVE 60 MPH AS STORMS MOVE FROM
NORTHWEST TO SOUTHEAST AT 25 MPH. ISOLATED STORMS COULD ALSO
PRODUCE HAIL AS LARGE AS AN INCH IN DIAMETER. THE BEST CHANCE FOR
SEVERE WEATHER WILL BE FROM NOON TO 5 PM.

A HOT AND HUMID AIR MASS IN PLACE WILL REACT WITH A WEAK FRONT
OVER THE AREA AS ONGOING THUNDERSTORMS TO THE WEST AND NORTHWEST
MOVE IN.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

HOT AND HUMID WEATHER CONDITIONS WILL CONTINUE THROUGH MONDAY AND
TUESDAY. HEAT INDICES AT OR A FEW DEGREES ABOVE 100 WILL BE
POSSIBLE AND A HEAT ADVISORY MAY BE NEEDED...ESPECIALLY FOR THE
AFTERNOON AND EARLY EVENING HOURS.

THE HOT AND HUMID CONDITIONS WILL PERSIST AHEAD OF A COLD FRONT
MOVING THROUGH THE REGION ON WEDNESDAY AND THURSDAY. THIS FRONT
WILL BRING A CHANCE OF THUNDERSTORMS FROM TUESDAY NIGHT THROUGH
WEDNESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

DISPATCHERS PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY.
SPOTTER ACTIVATION HAS OCCURRED.

LCZ422-423-460-LEZ444-LHZ421-422-441>443-462>464-311000-
ST. CLAIR RIVER-DETROIT RIVER-LAKE ST. CLAIR-
MICHIGAN WATERS OF LAKE ERIE-OUTER SAGINAW BAY-INNER SAGINAW BAY-
PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI-
PORT SANILAC TO PORT HURON MI-
LAKE HURON OFFSHORE BEYOND 5 NM FROM PORT AUSTIN TO HARBOR BEACH MI-
LAKE HURON OFFSHORE BEYOND 5 NM FROM HARBOR BEACH TO PORT SANILAC MI-
LAKE HURON OFFSHORE BEYOND 5 NM FROM PORT SANILAC TO PORT HURON MI-
1016 AM EDT SUN JUL 30 2006

...SEVERE THUNDERSTORM WATCH 660 IN EFFECT UNTIL 500 PM EDT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR LAKE ST CLAIR...THE MICHIGAN
WATERS OF LAKE ERIE AND LAKE HURON.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THE AFTERNOON. THERE
IS A CHANCE THAT SOME OF THESE THUNDERSTORMS COULD BE SEVERE...
WITH DAMAGING WIND GUSTS ABOVE 50 KNOTS AS STORMS MOVE FROM
NORTHWEST TO SOUTHEAST AT 25 MPH. ISOLATED STORMS COULD ALSO
PRODUCE HAIL AS LARGE AS AN INCH IN DIAMETER. THE BEST CHANCE FOR
SEVERE WEATHER WILL BE FROM NOON TO 5 PM.

A HOT AND HUMID AIR MASS IN PLACE WILL REACT WITH A WEAK FRONT
OVER THE AREA AS ONGOING THUNDERSTORMS TO THE WEST AND NORTHWEST
MOVE IN.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE HOT AND HUMID CONDITIONS WILL PERSIST AHEAD OF A COLD FRONT
MOVING THROUGH THE REGION ON WEDNESDAY AND THURSDAY. THIS FRONT
WILL BRING A CHANCE OF THUNDERSTORMS FROM TUESDAY NIGHT THROUGH
WEDNESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

DISPATCHERS PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY.
SPOTTER ACTIVATION HAS OCCURRED.

DWD

YOU CAN OBTAIN YOUR LATEST NATIONAL WEATHER SERVICE FORECASTS ONLINE
AT WWW.WEATHER.GOV/DETROIT (ALL LOWER CASE).

In the hours before

Local storm report, Jul 30, 1:48 PM EDT, 1 hour 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
148 PM EDT SUN JUL 30 2006

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

0130 PM     TSTM WND DMG     3 NW MIDLAND            43.65N 84.27W
07/30/2006                   MIDLAND            MI   LAW ENFORCEMENT

            CENTRAL DISPATCH REPORTS A TREE AND WIRES BLOWN DOWN ON
            WACKERLY ROAD.

&&

HATZOS
Local storm report, Jul 30, 2:17 PM EDT, 46 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 1:08 PM EDTSevere Thunderstorm WarningDTXShiawassee67 min
Jul 30, 1:18 PM EDTSevere Thunderstorm WarningDTXMidland35 min
Jul 30, 1:21 PM EDTSpecial Marine WarningDTX114 min
Jul 30, 1:59 PM EDTSevere Thunderstorm WarningDTXGenesee32 min
Jul 30, 2:05 PM EDTSevere Thunderstorm WarningDTXLivingston37 min
Jul 30, 2:47 PM EDTSpecial Marine WarningDTX88 min
Jul 30, 2:51 PM EDTSpecial Marine WarningDTX101 min
Jul 30, 3:01 PM EDTSevere Thunderstorm WarningDTXTuscola22 min
Jul 30, 3:26 PM EDTSevere Thunderstorm WarningDTXSaint Clair43 min
Jul 30, 3:59 PM EDTHeat AdvisoryDTXBay, Genesee, Huron, Lapeer, Lenawee, Livingston and 11 more3 days

Nearby

Severe Thunderstorm Warnings in Michigan, 2006Every severe thunderstorm warning in 2006

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.