Alert archive / Michigan / Special Weather Statements in 2017

Special Weather Statement, NWS Detroit, MI

August 2, 2017Genesee County, Michigan

NWS Detroit, MI issued this special weather statement at Aug 2, 2017, 7:35 PM EDT for Genesee County, Michigan. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 2, 2017, 7:35 PM EDT (23:35 UTC)
Expired: Aug 2, 2017, 8:15 PM EDT
In force: 40 min
Issued by: NWS Detroit, MI

County Genesee County, MI

The radar

The Detroit radar (KDTX), 41 km from the middle of the area, began a volume at 23:36 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, 11.6 hours before the alert went out and 42 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: 242 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: -47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 2, 6:48 PM EDT, 47 minutes earlier.

Area forecast discussion, Aug 2, 6:48 PM EDT, 47 minutes before

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Hazardous weather outlook, Aug 2, 3:45 AM EDT, 15 hours 50 minutes before

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
345 AM EDT Wed Aug 2 2017

MIZ047>049-053>055-060>063-068>070-075-076-082-083-030815-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
345 AM EDT Wed Aug 2 2017

This hazardous weather outlook is for southeast Michigan.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected, mainly this afternoon.
Theses storms are not expected to be severe. The strongest storms
will be capable of a heavy downpour, wind gusts to 45 mph, and pea
size hail while moving west to east at 20 MPH.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

There is a chance of thunderstorms Thursday through Friday morning.
There is a marginal risk of severe storms late Thursday into Thursday
Night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-030815-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM
off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw
Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
345 AM EDT Wed Aug 2 2017

This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected, mainly this afternoon.
Theses storms are not expected to be severe. The strongest storms
will be capable of a heavy downpour, wind gusts to 40 knots, and pea
size hail while moving west to east at 15 knots.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

There is a chance of thunderstorms Thursday through Friday morning.
There is a marginal risk of severe storms late Thursday into Thursday
Night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

SF

In the hours before

Local storm report, Aug 2, 5:57 PM EDT, 1 hour 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
557 PM EDT WED AUG 02 2017

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

0545 PM     HAIL             WYANDOTTE               42.21N 83.16W
08/02/2017  M0.50 INCH       WAYNE              MI   TRAINED SPOTTER

            MARBLE SIZED HAIL FELL AT 16TH AND PINE STREETS IN
            WYANDOTTE. STREET FLOODING ALSO OCCURRING.

&&

JD

Local storm report, Aug 2, 6:06 PM EDT, 1 hour 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
606 PM EDT WED AUG 02 2017

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

0600 PM     FLOOD            6 SSE SOUTHFIELD        42.40N 83.22W
08/02/2017                   WAYNE              MI   DEPT OF HIGHWAYS

            MDOT REPORTS FLOODING ONGOING ON SOUTHBOUND M-39 AT GRAND
            RIVER.

&&

JD

Local storm report, Aug 2, 6:12 PM EDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
612 PM EDT WED AUG 02 2017

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

0610 PM     HEAVY RAIN       SOUTHGATE               42.20N 83.21W
08/02/2017  M1.20 INCH       WAYNE              MI   TRAINED SPOTTER

            30 MINUTE RAINFALL TOTAL.

&&

JD

Local storm report, Aug 2, 6:21 PM EDT, 1 hour 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
621 PM EDT WED AUG 02 2017

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

0609 PM     FLOOD            DOWNTOWN DETROIT        42.33N 83.05W
08/02/2017                   WAYNE              MI   DEPT OF HIGHWAYS

            MDOT REPORTS FLOODING ON NORTHBOUND M-10 AFTER JEFFERSON.

&&

JD

Special weather statement, Aug 2, 6:24 PM EDT, 1 hour 11 minutes before

Special Weather Statement
National Weather Service Detroit/Pontiac MI
624 PM EDT WED AUG 2 2017

MIZ082-022330-
Lenawee MI-
624 PM EDT WED AUG 2 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN LENAWEE COUNTY UNTIL 730
PM EDT...

At 623 PM EDT, Doppler radar indicated a strong thunderstorm over
Britton, or near Tecumseh, moving east at 15 mph.

Nickel size hail and winds near 40 mph will be possible with this
storm.

This strong thunderstorm will be near...
  Deerfield around 640 PM EDT.

Other locations impacted by this storm include Riga, Ridgeway,
Palmyra, Fairfield, Tipton, Sand Creek and Holloway.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4184 8415 4207 8411 4205 8377 4172 8377
      4172 8380
TIME...MOT...LOC 2223Z 285DEG 15KT 4196 8384

BT

Special weather statement, Aug 2, 7:35 PM EDT, 0 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
Aug 2, 3:08 PM EDT	Special Weather Statement	DTX	Bay, Midland	67 min
Aug 2, 3:16 PM EDT	Special Weather Statement	DTX	Macomb, Saint Clair	74 min
Aug 2, 3:39 PM EDT	Special Marine Warning	DTX		51 min
Aug 2, 3:44 PM EDT	Special Weather Statement	DTX	Oakland	61 min
Aug 2, 3:50 PM EDT	Special Weather Statement	DTX	Wayne	40 min
Aug 2, 4:09 PM EDT	Special Weather Statement	DTX	Wayne	66 min
Aug 2, 4:16 PM EDT	Special Marine Warning	DTX		59 min
Aug 2, 4:50 PM EDT	Areal Flood Advisory	DTX	Wayne	3 hr
Aug 2, 5:10 PM EDT	Severe Thunderstorm Warning	DTX	Wayne	65 min
Aug 2, 5:15 PM EDT	Special Marine Warning	DTX		60 min
Aug 2, 6:02 PM EDT	Severe Thunderstorm Warning	DTX	Monroe	73 min
Aug 2, 6:05 PM EDT	Special Marine Warning	DTX		85 min
Aug 2, 6:24 PM EDT	Special Weather Statement	DTX	Lenawee	66 min
Aug 2, 6:47 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	35 min

Nearby

Special Weather Statements in Michigan, 2017 Every special weather statement in 2017

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.