Alert archive / Michigan / Winter Weather Advisories in 2017

Winter Weather Advisory 39, NWS Gaylord, MI

December 29, 2017Benzie County, Michigan

NWS Gaylord, MI issued this winter weather advisory at Dec 29, 2017, 9:24 PM EST for Benzie County, Michigan. It took effect at Dec 29, 2017, 11:00 PM EST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Dec 29, 2017, 9:24 PM EST (02:24 UTC)
In effect from
Dec 29, 2017, 11:00 PM EST
Expired
Dec 30, 2017, 1:27 PM EST
In force
14 hr
Issued by
NWS Gaylord, MI

County Benzie County, MI

The radar

The NCL Michigan radar (KAPX), 117 km from the middle of the area, began a volume at 02:24 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 00:00Z, 2.4 hours before the alert went out and 303 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 00:00Z on 2017-12-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2017-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
689 m above ground
0-6 km bulk shear
84 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
216 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 winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Gaylord, MI wrote its last area forecast discussion before this winter weather advisory went out at Dec 29, 8:42 PM EST, 42 minutes earlier.

Area forecast discussion, Dec 29, 8:42 PM EST, 42 minutes before
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Hazardous weather outlook, Dec 29, 3:31 PM EST, 5 hours 53 minutes before
Hazardous Weather Outlook
National Weather Service Gaylord MI
331 PM EST Fri Dec 29 2017

LHZ345>349-LMZ323-341-342-344>346-LSZ321-322-MIZ008-015>036-041-
042-301100-
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-St Ignace to False Detour Channel-
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island-
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-Sturgeon Pt to Alabaster MI-
Grand Traverse Bay south of a line Grand Traverse Light to
Norwood MI-Seul Choix Point to 5NM West of Mackinac Bridge-
Norwood MI to 5NM West of Mackinac Bridge including Little
Traverse Bay-Sleeping Bear Point to Grand Traverse Light MI-
Point Betsie to Sleeping Bear Point MI-
Manistee to Point Betsie MI-
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
St. Marys River Point Iroquois to E. Potagannissing Bay-Chippewa-
Mackinac-Emmet-Cheboygan-Presque Isle-Charlevoix-Leelanau-Antrim-
Otsego-Montmorency-Alpena-Benzie-Grand Traverse-Kalkaska-Crawford-
Oscoda-Alcona-Manistee-Wexford-Missaukee-Roscommon-Ogemaw-Iosco-
Gladwin-Arenac-
331 PM EST Fri Dec 29 2017

This hazardous weather outlook is for northern Lower Michigan...
eastern Upper Michigan...and adjacent nearshore waters of Lake
Michigan...Lake Huron and Lake Superior.

.DAY ONE...Tonight.

Periods of moderate to heavy lake effect snow showers and poor
visibility will impact Mackinac county into this evening and
portions of far Northern and Northwest Lower Michigan tonight into
Saturday. See ongoing warnings and advisories for further details.

Persistent cold weather could cause ice jam flooding on area
rivers over the next several days.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Periods of accumulating lake effect snow and significantly
reduced visibility are expected in portions of northern Michigan
over the next several days. See ongoing advisories for further
details.

With the persistent cold weather, ice jams are possible on area
rivers.

Well below zero wind chills will return this weekend and into New
Years Day.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report snowfall amounts to the
National Weather Service. Reports may be made one of three ways:

Online:    weather.gov/gaylord
Facebook: facebook.com/nwsgaylord
Twitter: twitter.com/nwsgaylord

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 30, 4:08 AM ESTWinter Weather AdvisoryAPXAntrim, Manistee54 hr
Dec 30, 3:53 PM ESTWind Chill AdvisoryAPX20 hr

Nearby

Winter Weather Advisories in Michigan, 2017Every winter weather advisory 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.