Alert archive / Michigan / Flood Watches in 2018

Flood Watch 3, NWS Grand Rapids, MI

August 28, 201823 counties in Michigan

NWS Grand Rapids, MI issued this flood watch at Aug 28, 2018, 10:59 AM EDT for 23 counties in Michigan. It took effect at Aug 28, 2018, 6:00 PM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Aug 28, 2018, 10:59 AM EDT (14:59 UTC)
In effect from
Aug 28, 2018, 6:00 PM EDT
Expired
Aug 29, 2018, 2:43 AM EDT
In force
9 hr
Issued by
NWS Grand Rapids, MI
Flood severity
None
All 23 counties

Allegan County, MI, Barry County, MI, Calhoun County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 27 km from the middle of the area, began a volume at 15:01 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, 3.0 hours before the alert went out and 165 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 2018-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 497 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 2018-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 square meters per square second.19395878Sfc1 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
497 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
672 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Aug 28, 7:55 AM EDT, 3 hours 4 minutes earlier.

Area forecast discussion, Aug 28, 7:55 AM EDT, 3 hours 4 minutes before
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Hazardous weather outlook, Aug 28, 5:26 AM EDT, 5 hours 33 minutes before
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
526 AM EDT Tue Aug 28 2018

MIZ037>040-043>046-050>052-056>059-064>067-071>074-290930-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
526 AM EDT Tue Aug 28 2018

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

.DAY ONE...Today and Tonight

Thunderstorms north of a Saugatuck to Lansing line will weaken
this morning, but may produce locally heavy rain through 10 am.
Severe thunderstorms with damaging winds and torrential rainfall
are possible this afternoon and tonight. A flooding threat exists,
especially if storms repeat over areas already impacted by heavy
rain.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Thunderstorms are possible Wednesday, mainly in the morning.
Severe weather and heavy rain are not expected, although areas of
flooding may linger. After dry weather on Thursday and Friday,
thunderstorms are possible again over Labor Day weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and tonight.

LMZ844>849-290930-
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-
526 AM EDT Tue Aug 28 2018

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

.DAY ONE...Today and Tonight

Winds and waves will remain hazardous to small craft, swimmers,
and anyone venturing out on piers today. Thunderstorms north of
Saugatuck will weaken this morning, but may produce erratic gusty
winds to 35 knots and dangerous lightning through 10 am.
Additional storms are expected over all of Lake Michigan this
afternoon and tonight. Some of these storms could produce winds to
50 knots.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Hazardous winds and waves are possible on Wednesday, but the
wind will be northerly rather than southerly. Thunderstorms are
possible Wednesday morning but are not expected to be severe.
After dry weather on Thursday and Friday, thunderstorms are
possible again over Labor Day weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and tonight.

Meade

In the hours before

Local storm report, Aug 28, 6:27 AM EDT, 4 hours 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
627 AM EDT TUE AUG 28 2018

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

0130 AM     TSTM WND GST     LUDINGTON BUOY          44.00N 86.60W
08/28/2018  M54 MPH          LMZ868             MI   BUOY

            BUOY STATION 45024, LUDINGTON BUOY.

0255 AM     TSTM WND GST     BIG RAPIDS ROBEN-HOOD A 43.72N 85.50W
08/28/2018  M46 MPH          MECOSTA            MI   AWOS

            AWOS STATION RQB, BIG RAPIDS ROBEN-HOOD
            ARPT.

0410 AM     TSTM WND GST     1 W GRAND HAVEN         43.06N 86.26W
08/28/2018  M43 MPH          LMZ846             MI   MESONET

            MESONET STATION XGHL, 1 W GRAND HAVEN.

1159 PM     TSTM WND GST     4 SSE HART              43.64N 86.33W
08/27/2018  M42 MPH          OCEANA             MI   MESONET

            MESONET STATION AU347, 4 SSE HART.

0415 AM     TSTM WND GST     W MICH REGIONAL ARPT    42.74N 86.11W
08/28/2018  M41 MPH          ALLEGAN            MI   ASOS

            ASOS STATION BIV, W MICH REGIONAL ARPT.

0147 AM     TSTM WND GST     2 W SCOTTVILLE          43.96N 86.34W
08/28/2018  M41 MPH          MASON              MI   MESONET

            MESONET STATION MC016, 2 W SCOTTVILLE.

0355 AM     TSTM WND GST     MT PLEASANT MUNI ARPT   43.62N 84.74W
08/28/2018  M41 MPH          ISABELLA           MI   AWOS

            AWOS STATION MOP, MT PLEASANT MUNI ARPT.

0440 AM     TSTM WND GST     PORT SHELDON BUOY       42.90N 86.30W
08/28/2018  M40 MPH          LMZ874             MI   BUOY

            BUOY STATION 45029, PORT SHELDON BUOY.

0238 AM     TSTM WND GST     FREMONT MUNICIPAL ARPT  43.44N 85.99W
08/28/2018  M38 MPH          NEWAYGO            MI   AWOS

            AWOS STATION FFX, FREMONT MUNICIPAL ARPT.

0135 AM     TSTM WND GST     MASON CO APT            43.97N 86.42W
08/28/2018  M37 MPH          MASON              MI   AWOS

            AWOS STATION LDM, MASON CO APT.

0150 AM     TSTM WND GST     3 ENE PENTWATER         43.81N 86.38W
08/28/2018  M35 MPH          OCEANA             MI   MESONET

            MESONET STATION E6978, 3 ENE PENTWATER.

&&
Local storm report, Aug 28, 6:56 AM EDT, 4 hours 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
656 AM EDT TUE AUG 28 2018

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

0646 AM     HEAVY RAIN       TWIN LAKE               43.37N 86.18W
08/28/2018  M1.93 INCH       MUSKEGON           MI   MESONET

            STATION KMITWINL8. THE 36 HOUR RAIN TOTAL IS
            8.35 INCHES.

0656 AM     HEAVY RAIN       3 ENE MUSKEGON          43.24N 86.20W
08/28/2018  M1.81 INCH       MUSKEGON           MI   MESONET

            STATION KMIMUSKE38.

0650 AM     HEAVY RAIN       1 E TWIN LAKE           43.37N 86.16W
08/28/2018  M1.81 INCH       MUSKEGON           MI   MESONET

            STATION KMITWINL10. THE 36 HOUR RAIN TOTAL
            IS 8.12 INCHES.

0645 AM     HEAVY RAIN       3 NNE MONTAGUE          43.45N 86.35W
08/28/2018  M1.76 INCH       MUSKEGON           MI   MESONET

            STATION KMIMONTA10.

0641 AM     HEAVY RAIN       5 SSE STONY LAKE        43.49N 86.46W
08/28/2018  M1.70 INCH       OCEANA             MI   MESONET

            STATION KMIMONTA8.

0653 AM     HEAVY RAIN       1 WNW ROOSEVELT PARK    43.20N 86.30W
08/28/2018  M1.68 INCH       MUSKEGON           MI   MESONET

            STATION KMIMUSKE45. THE 36 HOUR RAINFALL IS
            4.82 INCHES.

0639 AM     HEAVY RAIN       NEW ERA                 43.56N 86.34W
08/28/2018  M1.60 INCH       OCEANA             MI   MESONET

            STATION KMINEWER4.

0637 AM     HEAVY RAIN       4 WNW MEARS             43.70N 86.51W
08/28/2018  M1.56 INCH       OCEANA             MI   MESONET

            STATION KMIMEARS5.

0638 AM     HEAVY RAIN       3 NNW STONY LAKE        43.59N 86.53W
08/28/2018  M1.50 INCH       OCEANA             MI   MESONET

            STATION KMISHELB33.

0651 AM     HEAVY RAIN       2 N MUSKEGON            43.26N 86.26W
08/28/2018  M1.50 INCH       MUSKEGON           MI   MESONET

            STATION KMINORTH13. THE 36 HOUR RAINFALL IS
            7.53 INCHES.

0645 AM     HEAVY RAIN       1 NNW 5 SW WHITEHALL    43.38N 86.43W
08/28/2018  M1.30 INCH       MUSKEGON           MI   MESONET

            STATION KMIMONTA7.

0646 AM     HEAVY RAIN       1 NNE MONTAGUE          43.42N 86.36W
08/28/2018  M1.13 INCH       MUSKEGON           MI   MESONET

            STATION KMIMONTA1.

&&
Local storm report, Aug 28, 7:34 AM EDT, 3 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
734 AM EDT TUE AUG 28 2018

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

0716 AM     HEAVY RAIN       GRANDVILLE              42.91N 85.76W
08/28/2018  M1.58 INCH       KENT               MI   MESONET

            MESONET STATION D6683, GRANDVILLE.

&&
Local storm report, Aug 28, 7:49 AM EDT, 3 hours 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
749 AM EDT TUE AUG 28 2018

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

0745 AM     HEAVY RAIN       1 NNW COMSTOCK PARK     43.06N 85.68W
08/28/2018  M2.05 INCH       KENT               MI   MESONET

            STATION KMICOMST8.

0738 AM     HEAVY RAIN       1 WNW FREMONT           43.47N 85.97W
08/28/2018  M1.74 INCH       NEWAYGO            MI   MESONET

            STATION KMIFREMO7.

0742 AM     HEAVY RAIN       2 S BELMONT             43.05N 85.61W
08/28/2018  M1.73 INCH       KENT               MI   MESONET

            STATION KMIGRAND228.

0741 AM     HEAVY RAIN       1 SSW ROCKFORD          43.12N 85.56W
08/28/2018  M1.25 INCH       KENT               MI   MESONET

            STATION KMIROCKF23.

0738 AM     HEAVY RAIN       2 SSW CEDAR SPRINGS     43.19N 85.57W
08/28/2018  M1.02 INCH       KENT               MI   MESONET

            STATION KMICEDAR38.

&&
Local storm report, Aug 28, 8:10 AM EDT, 2 hours 49 minutes before
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Local storm report, Aug 28, 8:54 AM EDT, 2 hours 5 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 12:35 AM EDTSpecial Marine WarningGRR55 min
Aug 28, 12:54 AM EDTSevere Thunderstorm WarningGRRMason66 min
Aug 28, 1:50 AM EDTSpecial Weather StatementGRRLake85 min
Aug 28, 1:52 AM EDTSpecial Weather StatementGRROceana83 min
Aug 28, 2:24 AM EDTSpecial Weather StatementGRROsceola66 min
Aug 28, 3:51 AM EDTAreal Flood AdvisoryGRRMuskegon, Oceana6 hr
Aug 28, 6:07 PM EDTSpecial Marine WarningGRR83 min
Aug 28, 6:23 PM EDTSpecial Weather StatementGRRAllegan52 min
Aug 28, 6:34 PM EDTSevere Thunderstorm WarningGRRAllegan, Ottawa41 min
Aug 28, 6:42 PM EDTSevere Thunderstorm WarningGRRMason, Muskegon, Oceana63 min
Aug 28, 6:48 PM EDTSpecial Marine WarningGRR57 min
Aug 28, 7:06 PM EDTSevere Thunderstorm WarningGRRKent39 min
Aug 28, 7:14 PM EDTSevere Thunderstorm WarningGRRLake, Mecosta, Newaygo, Osceola61 min
Aug 28, 7:26 PM EDTSevere Thunderstorm WarningGRRAllegan, Ottawa49 min
Aug 28, 7:54 PM EDTSevere Thunderstorm WarningGRRClare, Isabella66 min

Nearby

Flood Watches in Michigan, 2018Every flood watch in 2018

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.