Saturday, July24, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Grand Rapids, MI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:24AMSunset 9:13PM Saturday July 24, 2021 5:26 PM EDT (21:26 UTC) Moonrise 9:11PMMoonset 5:39AM Illumination 100% Phase: Full Moon; Moon at 15 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
    EDIT      (on/off)   Help
LMZ846 Holland To Grand Haven Mi- 430 Pm Edt Sat Jul 24 2021
.dense fog advisory in effect until 8 pm edt this evening...
.small craft advisory in effect until 8 pm edt this evening...
Through early evening..Southwest winds 15 to 25 knots. Partly Sunny with scattered rain showers and a chance of Thunderstorms. Haze and widespread dense fog. Some Thunderstorms may be severe with damaging winds. Waves 2 to 4 feet.
Tonight..West winds 5 to 15 knots. Partly cloudy. Scattered rain showers and a chance of Thunderstorms in the evening. Waves 1 to 3 feet.
Sunday..Southwest winds 5 to 10 knots. Sunny. Waves around 1 foot.
Sunday night..West winds 5 to 10 knots. Mostly clear. Waves 1 foot or less.
Monday..West winds 5 to 10 knots. Sunny. Waves less than 1 foot.
Monday night..Southwest winds around 10 knots. Partly cloudy. Waves 1 foot or less.
Tuesday..Southwest winds 10 to 15 knots. Mostly Sunny. Waves around 1 foot.
Wednesday..Southwest winds 10 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Thursday..Northwest winds 10 to 15 knots. Mostly Sunny with a chance of rain showers. Waves 1 to 2 feet.
LMZ846 Expires:202107250815;;393102 FZUS53 KGRR 242030 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 430 PM EDT Sat Jul 24 2021 For waters within five nautical miles of shore on Lake Michigan LMZ846-250815-


7 Day Forecast for Marine Location Near Grand Rapids, MI
   Hourly   EDIT   Help
location: 42.95, -85.67     debug


Area Discussion for - Grand Rapids, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KGRR 241935 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 335 PM EDT Sat Jul 24 2021

LATEST UPDATE . Synopsis/Discussion/Marine

SYNOPSIS. Issued at 330PM EDT Sat Jul 24 2021

- Severe storms possible this afternoon and early evening

- Several rounds of showers and storms midweek

DISCUSSION. (This evening through next Saturday) Issued at 330 PM EDT Sat Jul 24 2021

-- Severe storms possible this afternoon and early evening --

Scattered thunderstorms are likely with the strongest storms probable between 4 to 6 pm. Severe weather from damaging winds is possible in this timeframe. Due to this threat a severe thunderstorm watch has been issued.

Storms will form along a boundary moving from the northwest moving across southwest Michigan, continuing through the early evening hours.

Daytime temperatures in the 80s with dewpoints in the 70s has created a warm moist environment which is conducive for convection. Along with this is strong southerly flow that is gusting upwards of 25kts. This southerly flow will feed into the upper level northwesterly flow further enhancing instability this afternoon. Storms that have previously moved along the US 10 corridor have mixed up air. However as successive bands move through lower Michigan into the unstable air mass these storms could rapidly intensify.

Strong DCAPE along with decent helicity, along with decent mid level lapse rates makes damaging winds the main threat with an isolated tornado or two possible.

The main front remains further to the northwest near the U.P and Wisconsin so several lines of storms remain possible into the early evening hours.

- Several rounds of showers and storms midweek --

An upper level ridge will build over the region in the wake of this system with strong mid and upper level flow Tuesday through Thursday. This will create an environment conducive to organized convection. Highs in the mid to upper 80s through the week will only enhances this possibility. Have increased chance of POPs through this timeframe. The best chances as of now are Tuesday and Thursday where two elongated waves will be diving down over the semipermanent high pressure that will build over the intermountain west this week. As a result we will continue to feature this risk in the hazardous weather outlook.

AVIATION. (For the 18Z TAFS through 18Z Sunday afternoon) Issued at 156 PM EDT Sat Jul 24 2021

Mainly VFR conditions prevailing currently although there are a few areas of 4-6sm vsbys in haze/smoke. Southwest winds gusting to 20-25 kts at times.

A relatively narrow broken band of showers and tstms is expected to drift southward through southern Lower Michigan between roughly 20Z and 02Z, impacting any given location/terminal for no more than two hours. Since a few strong/severe storms are possible, a local gust over 40 kts cannot be ruled out as the storms pass through a terminal.

Skies clearing out behind the storms later tonight, leading to areas of radiational fog developing with light winds. IFR vsbys are certainly possible after midnight, and some local LIFR can't totally be ruled out either.

MARINE. Issued at 330 PM EDT Sat Jul 24 2021

Whitecaps at multiple beaches with 3 to 5 foot waves as the persistent winds continue through the daytime. Highest waves will be at and north of Holland and will continue through the afternoon and through 8 pm. Storms will continue to move through Lake Michigan and will move through nearshore waters this afternoon and evening. Damaging winds are possible with these storms.

Visibility will be reduced due to intermittent dense fog with smoky haze along the shore line due to the warm water temps and the sfc dewpoints in the low 70s. The smokey haze is due from the wildfires out west. Expect patchy fog overnight and into Sunday morning. Winds and waves will subside Sunday morning with fair skies.

GRR WATCHES/WARNINGS/ADVISORIES. MI . Beach Hazards Statement until 8 PM EDT this evening for MIZ037- 043-050-056.

LM . Dense Fog Advisory until 8 PM EDT this evening for LMZ844>849.

Small Craft Advisory until 8 PM EDT this evening for LMZ846>849.



SYNOPSIS . Ceru DISCUSSION . Ceru AVIATION . Meade MARINE . Ceru


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 31 mi56 min S 18 G 20 77°F 73°F1008.4 hPa72°F
45029 32 mi26 min NW 14 G 18 75°F 72°F3 ft1008.1 hPa (-1.9)69°F
45161 40 mi46 min SW 12 G 14 74°F 71°F3 ft1009 hPa
MKGM4 - Muskegon, MI 40 mi36 min W 13 G 15 74°F 1008.3 hPa70°F

Wind History for Holland, MI
(wind in knots)    EDIT      (on/off)   Help
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last
24hr
S7
S7
S9
S8
S5
G8
S9
S11
S11
S12
S11
S13
G16
S14
S13
S14
S15
S16
S15
S16
S17
S17
S15
S17
S17
S17
1 day
ago
SW2
SW3
SW2
SE3
SE1
SE3
S5
SE6
G11
SE5
S10
S14
S12
S11
S13
E13
G17
E8
E9
E7
SE3
G6
S10
G13
S10
S9
S7
S8
2 days
ago
NW14
NW12
NW12
NW12
N10
N4
G8
E5
E3
E5
E5
N1
SE11
G15
SE12
G16
SE10
G15
SE7
G11
SE7
SE4
G8
S7
S5
S3
S2
--
SW4
S3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Grand Rapids, Gerald R. Ford International Airport, MI9 mi33 minWSW 16 G 259.00 miMostly Cloudy86°F73°F65%1007.8 hPa

Link to 5 minute data for KGRR

Wind History from GRR (wind in knots)
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last 24hrSW7E7E6SE5SE5S5S6S7S6S8SW9SW8S7S10SW11SW14
G24
SW13
G20
SW16
G22
SW12
G21
SW12SW14SW15
G23
SW22
G29
SW16
G25
1 day agoSE4SE9SE7SE5S5SE4S4S5S5S6S5SE11E7SE8SE8S6S10S6SW5SW7S7S5W11SW3
2 days agoE5NE7E6E4E4S3CalmS3CalmE3E3E4E4CalmE3S5S7S6S8S6S6S5S9S7

Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.