Alert archive / Michigan / Lakeshore Flood Statements in 2019

Lakeshore Flood Statement 1, NWS Grand Rapids, MI

February 23, 20196 counties in Michigan

NWS Grand Rapids, MI issued this lakeshore flood statement at Feb 23, 2019, 11:25 AM EST for 6 counties in Michigan. It took effect at Feb 24, 2019, 7:00 AM EST. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued
Feb 23, 2019, 11:25 AM EST (16:25 UTC)
In effect from
Feb 24, 2019, 7:00 AM EST
Expired
Feb 25, 2019, 3:43 AM EST
In force
21 hr
Issued by
NWS Grand Rapids, MI

Counties Allegan County, MI, Mason County, MI, Muskegon County, MI, Oceana County, MI, Ottawa County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 60 km from the middle of the area, began a volume at 16:29 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 4.4 hours before the alert went out and 214 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, Green Bay/Straub, WI at 12:00Z on 2019-02-23Temperature 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, Green Bay/Straub, WI at 12:00Z on 2019-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
1073 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
598 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 lakeshore flood statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Rapids, MI wrote its last area forecast discussion before this lakeshore flood statement went out at Feb 23, 11:15 AM EST, 10 minutes earlier.

Area forecast discussion, Feb 23, 11:15 AM EST, 10 minutes before
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Hazardous weather outlook, Feb 23, 5:29 AM EST, 5 hours 56 minutes before
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
529 AM EST Sat Feb 23 2019

MIZ037>040-043>046-050>052-056>059-064>067-071>074-241030-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
529 AM EST Sat Feb 23 2019

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

There is a chance for some freezing rain this morning across
Central Lower Michigan. If freezing rain occurs it will be light
and should end by early afternoon.

Isolated thunderstorms are expected tonight. While severe weather
is not forecast, a few wind gusts in excess of 40 mph will be
possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Strong and likely damaging winds will sweep across the area
Sunday morning and continue into Sunday night. Wind gusts may
reach 60 mph. Downed trees and tree limbs onto power lines will
create power outages, some of which could last days.

Lake effect snow showers will commence Sunday afternoon and
continue into Sunday night. Accumulations will range from 1 to 3
inches across Central Lower Michigan to an inch or less elsewhere.
Blowing snow and near whiteout conditions at times will be
possible Sunday afternoon and evening, especially across Central
Lower Michigan.

Some lakeshore flooding is a possibility Sunday in areas where
there is not significant shore ice. Where shore ice exists it
will provide protection or a buffer from the large waves. Water
levels will increase along the lakeshore with a strong push of
west winds. This will likely push both water and waves into the
channel between piers. Some flooding is possible in port towns,
along rivers, where water levels may increase.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

LMZ844>849-241030-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
529 AM EST Sat Feb 23 2019

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

Waves will build tonight and reach the 6 to 10 foot range towards
daybreak.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Waves will peak in the 12 to 18 foot range Sunday afternoon and
evening. Large waves in excess of 10 feet will continue into
Sunday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

DUKE

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 23, 3:32 PM ESTBlizzard WarningGRRClare, Lake, Mason, Mecosta, Newaygo, Oceana and 1 more36 hr
Feb 23, 3:38 PM ESTHigh Wind WarningGRRAllegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 10 more36 hr

Nearby

Lakeshore Flood Statements in Michigan, 2019Every lakeshore flood statement in 2019

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.