Marine Weather and Tide Forecast for South Haven, MI
April 19, 2024 12:48 AM EDT (04:48 UTC) Change Location
 | Sunrise 6:53 AM Sunset 8:33 PM Moonrise 3:30 PM Moonset 4:22 AM |
LMZ844 St Joseph To South Haven Mi- 1005 Pm Edt Thu Apr 18 2024
.small craft advisory in effect from 6 am edt Friday through Friday evening - .
Rest of tonight - North winds 10 to 15 knots backing northwest 15 to 25 knots toward daybreak. Rain through about 2 am, then a chance of rain and a slight chance of Thunderstorms overnight. Waves 1 to 3 feet building to 2 to 4 feet toward daybreak.
Friday - Northwest winds 15 to 20 knots backing west late in the day. Sunny. Waves 3 to 5 feet.
Friday night - West winds 15 to 25 knots. Partly cloudy. Waves 2 to 3 feet building to 3 to 5 feet after midnight.
Saturday - West winds to 30 knots decreasing to 10 to 15 knots late in the day. Sunny. Waves 4 to 6 feet.
Saturday night - West winds 10 to 15 knots. Partly cloudy. Waves 2 to 3 feet.
Sunday - West winds 10 to 20 knots. Sunny. Waves 1 to 3 feet.
Monday - Southwest winds around 15 knots. Sunny. Waves 1 to 2 feet.
Tuesday - Southwest winds around 20 knots veering northwest late in the day. Rain showers. Waves 2 to 4 feet.
LMZ800
No data
No data
Area Discussion for - Grand Rapids, MI
(hide/show) HelpNOTE: mouseover dotted underlined text for definition
FXUS63 KGRR 190032 AFDGRR
Area Forecast Discussion National Weather Service Grand Rapids MI 832 PM EDT Thu Apr 18 2024
KEY MESSAGES
- Rain tonight, and slight chance lightning in southern Mich.
- Cooler Friday night, near freezing
- Multiple chances of frost/freeze next week
- Only chance of rain Monday night-Tuesday
DISCUSSION
Issued at 340 PM EDT Thu Apr 18 2024
- Rain tonight, and slight chance lightning in southern Mich.
Virga and areas of light rain this afternoon will give way to a period of rain overnight as a wave of low pressure along a cold front tracks into the southern Great Lakes region. HRRR and NBM QPF indicate a good potential for at least 0.25 inches of rainfall, with a narrower stripe of 0.50 to 0.75 inches possible from southwest Michigan to the Saginaw valley. The HRRR and NAM-Nest soundings around I-94 this evening have MUCAPE greater than 100 J/kg originating from moist parcels at 800-750 mb underneath fairly steep lapse rates that extend up to 500 mb (-20 C). So this elevated convection in southern Michigan could produce a few lightning flashes and rumbles of thunder, with the threat ramping up after sunset.
- Cooler Friday night, near freezing
With increasing vulnerability to temperatures below 32 degrees among blossoming vegetation, Friday night will kick off about a weeklong pattern with threats of frost/freeze conditions (not every night of the next seven, but several of them). Temperatures are expected to drop into the mid 30s Friday night as progressively colder air is transported into the area among westerly winds. However, a pressure gradient will still exist given the center of high pressure being back in the northern Plains, so this may keep the surface winds up enough to prevent a sharper temperature inversion from becoming established near ground level.
- Multiple chances of frost/freeze next week
One concern that is growing for the colder spell this weekend, and cooler temperatures behind the Tuesday system are some frost/freeze possibilities. Recent coordination with agricultural interests including Michigan State extension, reveals that fruit trees are entering a vulnerable period in their growth for most of the area, except along the U.S.-10 corridor. The beginning of the growing season has been coordinated with surrounding offices.
We are looking at multiple nights where temperatures will drop to and a little below freezing. The nights with these concerns include Saturday and Sunday nights, and Tuesday and Wednesday nights. We are way too far out in time right now to fine tune details. This will be something we will continue to monitor and issue headlines for if needed as we come up to those conditions.
- Only chance of rain Monday night-Tuesday
The weather is looking very quiet for the area from this weekend through next Thursday. The only caveat to this will be a system that is forecast to move through the area from late Monday into Tuesday.
Behind the system that moves through on Friday, the area will be under the influence of NW flow aloft downstream of the upper ridge expected to be parked for a few days over the Plains. We will be under increasing subsidence, with a cool flow from the North and Northwest into early next week. This period should be rather dry also, with a good deal of sunshine during the days. This may start to create some Fire Weather concerns by later in the weekend after a couple of dry days.
The one system that looks to affect the area after Friday's system will be a short wave that moves through late Monday through Tuesday.
This energy will have its origins from the upper low off of the Western U.S. coast. It will tamp down the weak ridge over the Plains, and move through the area. Right now, it does look like it will have a sufficient low level feed of moisture from the Gulf to provide good rain chances for the area at that time. I would expect the rain amounts to end up a little less than advertised at the moment with a lot of dry air that is expected to have to be overcome.
Once the system on Tuesday moves out, we will see the upper ridge over the Plains become re-established as a large upper low complex moves in over the western portion of the CONUS. This will set us back up with drier conditions as heights build for the rest of the week.
AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
Issued at 830 PM EDT Thu Apr 18 2024
Rain showers have begun and will continue overnight into tomorrow.
There will be a period of MVFR then dropping to IFR cigs and vsbys beginning around 01Z. Best chances of IFR will be between 03Z to 11Z before rain tapers off.
Some low clouds will linger after the rain ends, and then clearing should take place toward or just after daybreak Friday.
Winds will become a bit gusty from the NW Friday morning, with gusts up to 30 knots expected.
MARINE
Issued at 340 PM EDT Thu Apr 18 2024
Hazardous waves for small craft will likely build up between South Haven and Whitehall early Friday morning and expand farther north and south for at least a portion of the day. Will extend the small craft advisory northward to Manistee and take it into Friday evening based on latest model guidance. There may be a slight lull in the conditions Friday night, mainly near South Haven, but the small craft advisory may also need to be extended through the day Saturday.
GRR WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...Small Craft Advisory from 6 AM to 8 PM EDT Friday for LMZ844>849.
Area Forecast Discussion National Weather Service Grand Rapids MI 832 PM EDT Thu Apr 18 2024
KEY MESSAGES
- Rain tonight, and slight chance lightning in southern Mich.
- Cooler Friday night, near freezing
- Multiple chances of frost/freeze next week
- Only chance of rain Monday night-Tuesday
DISCUSSION
Issued at 340 PM EDT Thu Apr 18 2024
- Rain tonight, and slight chance lightning in southern Mich.
Virga and areas of light rain this afternoon will give way to a period of rain overnight as a wave of low pressure along a cold front tracks into the southern Great Lakes region. HRRR and NBM QPF indicate a good potential for at least 0.25 inches of rainfall, with a narrower stripe of 0.50 to 0.75 inches possible from southwest Michigan to the Saginaw valley. The HRRR and NAM-Nest soundings around I-94 this evening have MUCAPE greater than 100 J/kg originating from moist parcels at 800-750 mb underneath fairly steep lapse rates that extend up to 500 mb (-20 C). So this elevated convection in southern Michigan could produce a few lightning flashes and rumbles of thunder, with the threat ramping up after sunset.
- Cooler Friday night, near freezing
With increasing vulnerability to temperatures below 32 degrees among blossoming vegetation, Friday night will kick off about a weeklong pattern with threats of frost/freeze conditions (not every night of the next seven, but several of them). Temperatures are expected to drop into the mid 30s Friday night as progressively colder air is transported into the area among westerly winds. However, a pressure gradient will still exist given the center of high pressure being back in the northern Plains, so this may keep the surface winds up enough to prevent a sharper temperature inversion from becoming established near ground level.
- Multiple chances of frost/freeze next week
One concern that is growing for the colder spell this weekend, and cooler temperatures behind the Tuesday system are some frost/freeze possibilities. Recent coordination with agricultural interests including Michigan State extension, reveals that fruit trees are entering a vulnerable period in their growth for most of the area, except along the U.S.-10 corridor. The beginning of the growing season has been coordinated with surrounding offices.
We are looking at multiple nights where temperatures will drop to and a little below freezing. The nights with these concerns include Saturday and Sunday nights, and Tuesday and Wednesday nights. We are way too far out in time right now to fine tune details. This will be something we will continue to monitor and issue headlines for if needed as we come up to those conditions.
- Only chance of rain Monday night-Tuesday
The weather is looking very quiet for the area from this weekend through next Thursday. The only caveat to this will be a system that is forecast to move through the area from late Monday into Tuesday.
Behind the system that moves through on Friday, the area will be under the influence of NW flow aloft downstream of the upper ridge expected to be parked for a few days over the Plains. We will be under increasing subsidence, with a cool flow from the North and Northwest into early next week. This period should be rather dry also, with a good deal of sunshine during the days. This may start to create some Fire Weather concerns by later in the weekend after a couple of dry days.
The one system that looks to affect the area after Friday's system will be a short wave that moves through late Monday through Tuesday.
This energy will have its origins from the upper low off of the Western U.S. coast. It will tamp down the weak ridge over the Plains, and move through the area. Right now, it does look like it will have a sufficient low level feed of moisture from the Gulf to provide good rain chances for the area at that time. I would expect the rain amounts to end up a little less than advertised at the moment with a lot of dry air that is expected to have to be overcome.
Once the system on Tuesday moves out, we will see the upper ridge over the Plains become re-established as a large upper low complex moves in over the western portion of the CONUS. This will set us back up with drier conditions as heights build for the rest of the week.
AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
Issued at 830 PM EDT Thu Apr 18 2024
Rain showers have begun and will continue overnight into tomorrow.
There will be a period of MVFR then dropping to IFR cigs and vsbys beginning around 01Z. Best chances of IFR will be between 03Z to 11Z before rain tapers off.
Some low clouds will linger after the rain ends, and then clearing should take place toward or just after daybreak Friday.
Winds will become a bit gusty from the NW Friday morning, with gusts up to 30 knots expected.
MARINE
Issued at 340 PM EDT Thu Apr 18 2024
Hazardous waves for small craft will likely build up between South Haven and Whitehall early Friday morning and expand farther north and south for at least a portion of the day. Will extend the small craft advisory northward to Manistee and take it into Friday evening based on latest model guidance. There may be a slight lull in the conditions Friday night, mainly near South Haven, but the small craft advisory may also need to be extended through the day Saturday.
GRR WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...Small Craft Advisory from 6 AM to 8 PM EDT Friday for LMZ844>849.
| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
| SVNM4 - South Haven, MI | 1 mi | 39 min | N 11G | 46°F | ||||
| 45168 | 3 mi | 49 min | NNE 7.8G | 45°F | 45°F | 1 ft | 30.02 | 41°F |
| SJOM4 - St. Joseph, MI | 24 mi | 49 min | NE 7G | 46°F | 30.02 | |||
| HLNM4 - 9087031 - Holland, MI | 26 mi | 55 min | NNE 2.9G | 46°F | 51°F | 29.95 | 41°F | |
| 45029 | 35 mi | 49 min | N 5.8G | 44°F | 44°F | 0 ft | 43°F | |
| 45214 | 44 mi | 164 min | 42°F | 0 ft | ||||
| MKGM4 - Muskegon, MI | 57 mi | 29 min | NNW 5.1G | 45°F | 30.01 | 43°F |
toggle option: (graph/table)
Airport Reports
EDIT (hide/show) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KLWA SOUTH HAVEN AREA RGNL,MI | 3 sm | 13 min | calm | 7 sm | Overcast | Rain | 45°F | 45°F | 100% | 29.99 |
| KBEH SOUTHWEST MICHIGAN RGNL,MI | 20 sm | 55 min | NE 03 | 5 sm | Overcast | Rain Mist | 46°F | 45°F | 93% | 29.98 |
Grand Rapids/Muskegon, MI,
NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE