Monday, September20, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
South Monroe, 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 7:18AMSunset 7:35PM Monday September 20, 2021 4:48 PM EDT (20:48 UTC) Moonrise 6:53PMMoonset 5:41AM Illumination 100% Phase: Full Moon; Moon at 14 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
LEZ444 Michigan Waters Of Lake Erie From Detroit River To North Cape Mi- 1002 Pm Edt Sat Jul 22 2017
Rest of tonight..West winds 5 to 10 knots veering to the north early in the morning. Partly cloudy. Waves around 2 feet or less.
Sunday..Light and variable winds. Mostly cloudy early in the morning...then partly cloudy with a chance of showers and Thunderstorms in the late morning and afternoon. Waves around 2 feet or less.
Sunday night..Southwest winds 5 to 10 knots veering to the west in the late evening and overnight. Mostly clear. A chance of showers and Thunderstorms early in the evening...then a slight chance of showers and Thunderstorms in the late evening and early morning. Waves around 2 feet or less.
Monday..Northwest winds 5 to 10 knots. Partly cloudy. Waves around 2 feet or less. SEe lake erie open lake forecast for days 3 through 5. The water temperature at belle isle is 77.4 degrees.
LEZ444 Expires:201707230900;;229447 FZUS63 KDTX 230203 GLFSC GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 1001 PM EDT Sat Jul 22 2017 For waters beyond five nautical miles off shore on Lake Huron Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A broad area of low pressure...29.70 inches...will slowly track across Lower Michigan through Sunday. The system will exit to the east Sunday night, pulling a cold front through the central Great Lakes late Sunday and Sunday night. High pressure...30.20 inches...then builds into the area Monday and Tuesday. LEZ444-230900-


7 Day Forecast for Marine Location Near South Monroe, MI
   Hourly   EDIT   Help
location: 41.9, -83.42     debug


Area Discussion for - Detroit/Pontiac, MI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KDTX 201939 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 339 PM EDT Mon Sep 20 2021

DISCUSSION.

Upper level shortwave will lift through southern lower Michigan late this afternoon into early this evening. Scattered showers and a few thunderstorms will accompany this wave as minor instability develops during peak heating despite a surge in moisture/cloud cover. This activity will fade late this evening into tonight with the passage of the wave and loss of daytime heating.

The push of deep moisture (PWATS of 1.50-2.00 inches) into the area in advance/with passage of this shortwave will end up being the most noteworthy aspect of the system as it sets the stage for a heavy rain event as deep upper troughing over the northern Rockies/northern plains works east into the region during the Tuesday/Wednesday time frame to provide abundant forcing and lift for several rounds of widespread rainfall . some of which will be heavy. In fact, given the degree of available moisture and dynamic nature of this upper trough/low, expect a decent likelihood of significant rainfall amounts of 2 to 4 inches and locally more through the middle of the week. A Flood Watch will likely be required to highlight this potential.

The first episode of heavy rain will arrive Tuesday afternoon and evening as a cold front is driven east into the area as upper jet pivots lifts north through the upper midwest/western Ontario and right entrance region overspreads the area during the day as upper trough ejects eastward into the Great Lakes. With deep moisture in place, afternoon instability in advance of the front will be limited to 1000 J/kg or less of "skinny" CAPE so severe weather potential will be quite limited and relegated to only isolated wet microburst activity.

Initial surface/low level based convection will develop and shift east through the forecast area late Tuesday with the passage of the surface front. Rain will persist into the evening/overnight even as the low level front shifts to the east/southeast as upper low begins to develop to the southwest as trailing jet energy digs into the mid Mississippi Valley/Ohio Valley. System relative flow back up the frontal surface will increase as upper low and associated surface cyclone strengthen into Tuesday night. All told, one or two inches of rain looks reasonable in many locations (especially over the southeast 1/2 to 2/3 of the forecast area) with potentially higher amounts locally where afternoon/evening convection enhances rates at times.

The second phase of this event will set up Wednesday into Wednesday night (and probably into Thursday) as the upper low and surface low deepen further and lift north/northeast into the vicinity. Strong frontal forcing will persist (and intensify) with periods of rain, some heavy, persisting in what will become the deformation zone around this upper system. While the best moisture will shift off to the east, PWATS in excess of 1 inch will persist with southeast flow around the low also feeding some of the higher moisture content back over the area. Another inch or two of rain will be possible with this activity as well with amounts more consistent on an areal basis as convective elements will have less influence in rates.

While most of this second period of rain will fall late Wednesday and Wednesday night, lingering showers will be likely into Thursday the upper low slowly occludes and lifts over the region. Shortwave ridging will then briefly shift over the area Friday before another upper trough/low digs into the the Great Lakes from southern Canada with this system bring cool and unsettled weather for the upcoming weekend.

MARINE.

A week of active weather across the Great Lakes begins today. A cold front is approaching from the west and has resulted in an increase in southerly flow and small craft advisory conditions tonight through Tuesday afternoon as gusty winds cause waves to build. The front then stalls across the eastern lakes as a low pressure system lifts north reaching Lake Erie Wednesday morning and then slowly continues northward to Lake Huron by Thursday. There will likely be an extended period where a tight pressure gradient resides over the area later in the week as this low runs up against high pressure building in from the west resulting in strong northerly winds. Expect small craft advisories more often than not through the week. In addition, there will be a period of thunderstorms with the cold front on Tuesday and a continued chance Wednesday into Thursday as the low sits overhead.

HYDROLOGY.

A strong cold front and developing upper level low pressure system will bring widespread rain showers and embedded thunderstorms to Southeast Michigan beginning Tuesday afternoon and continuing through Thursday. Rainfall totals of 1 to 2 inches will be possible Tuesday and Tuesday night across Southeast Michigan. The potential then exists for an additional 1 to 2 inches of heavy rainfall Wednesday night as a low pressure system lifts northward towards the western basin of Lake Erie. With event totals of 2 to 4 inches possible, urban and poor drainage flash flooding will be concerns as well as potential river flooding.

PREV DISCUSSION. Issued at 203 PM EDT Mon Sep 20 2021

AVIATION .

Increasing low level moisture lifting northward out of the Ohio Valley will bring lowering ceilings along with scattered rain showers this afternoon. Greater coverage of showers will expand across southeast Michigan through around 22Z before decreasing in coverage into the evening. Expectation is for predominately low end VFR ceilings with the occasional MVFR ceiling, mainly associated with passing shower activity. Winds will be out of the south with gusts to around 20-25 knots at times.

For DTW . Ceilings will be falling into low end VFR this afternoon with cloud bases right around 5,000 feet or below. Increasing moisture will bring light scattered showers throughout the afternoon, which will bring a chance to experience a period of MVFR ceilings.

DTW THRESHOLD PROBABILITIES .

* Moderate in ceilings at or below 5000 feet this afternoon and evening.

DTX WATCHES/WARNINGS/ADVISORIES. MI . NONE. Lake Huron . Small Craft Advisory from 10 PM this evening to 4 PM EDT Tuesday for LHZ421-422-441>443.

Lake St Clair . NONE. Michigan waters of Lake Erie . NONE.

DISCUSSION . DG MARINE . DRK HYDROLOGY . DG AVIATION . AA

You can obtain your latest National Weather Service forecasts online at www.weather.gov/detroit.


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
THLO1 - Toledo Light No. 2 OH 13 mi49 min SSE 8.9 G 8.9 77°F
THRO1 - 9063085 - Toledo, OH 15 mi55 min SSE 8.9 G 12 80°F 1016.4 hPa67°F
45165 16 mi39 min E 3.9 G 5.8 76°F 73°F1 ft
TWCO1 16 mi39 min SE 7 G 8 73°F
CMPO1 32 mi79 min S 1.9 G 4.1 80°F
SBIO1 - South Bass Island, OH 36 mi49 min SSE 15 G 17 80°F 1017.3 hPa (-0.8)
MRHO1 - 9063079 - Marblehead, OH 44 mi55 min S 4.1 G 8.9 80°F 74°F1016.9 hPa62°F
CLSM4 - St. Clair Shores, MI 49 mi49 min SSE 7 G 9.9 78°F 1018.3 hPa (-0.3)

Wind History for Toledo, OH
(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
E15
E12
G16
E9
G14
E13
G16
E9
G14
E11
G15
E7
G11
E6
E7
G11
SE10
G13
S5
S3
S3
S5
S7
SE7
S4
G8
SE6
SE8
G11
S9
S8
G11
S12
G17
S8
G14
S8
1 day
ago
E8
NE6
E11
G14
E10
G13
NE11
G15
NE10
NE9
G14
NE8
G13
E9
G12
E8
G11
E8
G12
E8
E6
E1
G4
N1
N3
NW1
E9
G12
E11
E9
G12
E9
G13
E12
E11
G15
E14
2 days
ago
SW6
G10
SE5
SE8
E3
SE5
G8
S3
SW3
W1
W1
W2
W3
NW4
N5
N3
G6
NE9
G15
NE9
G14
NE7
G13
NE8
G12
NE5
G9
NE4
G8
NE4
G7
NE5
NE8
G11
E8

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Monroe, Custer Airport, MI3 mi54 minSSE 9 G 1810.00 miMostly Cloudy79°F68°F69%1017.3 hPa
Lambertville, Toledo Suburban Airport, MI17 mi54 minS 810.00 miPartly Cloudy81°F68°F64%1017.3 hPa
Detroit/Grosse Ile, Grosse Ile Airport, MI20 mi54 minSSE 810.00 miMostly Cloudy77°F70°F79%1017.3 hPa
Detroit, Detroit Metropolitan Wayne County Airport, MI23 mi56 minSE 78.00 miOvercast77°F68°F74%1017.2 hPa
Detroit, Willow Run Airport, MI24 mi56 minSSE 810.00 miLight Rain82°F68°F63%1016.7 hPa
Toledo - Toledo Executive Airport, OH24 mi56 minS 1010.00 miOvercast82°F66°F58%1017.1 hPa

Link to 5 minute data for KTTF

Wind History from TTF (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 24hrE7E7E5E4------E3E4E3E3CalmE3SE3SE5S8S9SE8SE8SE6
G15
SE4SE6SE6S6
G16
1 day agoNE7NE6NE5NE3NE5NE6NE4N4CalmCalmCalmCalmCalmCalmCalmN3N4NE4SE7E5SE8SE8E7E7
2 days agoSE5SE7S4CalmCalmCalmCalmCalmW4CalmNW5NW4N5NE5NE5NW4NW5N7N6NE5NE5N9NE3NE6

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.