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Marine Weather and Tides
Version 3.4 |
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it. 8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue. 12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. |
Sunrise 7:52AM | Sunset 5:35PM | Friday January 22, 2021 8:53 PM EST (01:53 UTC) | Moonrise 12:47PM | Moonset 2:24AM | Illumination 72% | ![]() |
LCZ423 /o.can.kdtx.ma.w.0057.000000t0000z-201115t1715z/ 1150 Am Est Sun Nov 15 2020
.the special marine warning is cancelled... The affected areas were... Detroit river... Michigan waters of lake erie... The Thunderstorm has moved out of the area and no longer poses a significant threat to boaters. However a gale warning remains in effect. Boaters and mariners should continue to refer to the latest marine weather messages for the latest information. Lat...lon 4172 8347 4173 8345 4173 8350 4177 8350 4196 8328 4202 8323 4202 8324 4205 8319 4205 8315 4196 8311 4180 8333 4172 8341 time...mot...loc 1648z 233deg 42kt 4197 8303
.the special marine warning is cancelled... The affected areas were... Detroit river... Michigan waters of lake erie... The Thunderstorm has moved out of the area and no longer poses a significant threat to boaters. However a gale warning remains in effect. Boaters and mariners should continue to refer to the latest marine weather messages for the latest information. Lat...lon 4172 8347 4173 8345 4173 8350 4177 8350 4196 8328 4202 8323 4202 8324 4205 8319 4205 8315 4196 8311 4180 8333 4172 8341 time...mot...loc 1648z 233deg 42kt 4197 8303
LCZ423 Expires:202011151659;;883356
FZUS73 KDTX 151650
MWSDTX
Marine Weather Statement
National Weather Service Detroit/Pontiac MI
1150 AM EST Sun Nov 15 2020
LCZ423-LEZ444-151659-
7 Day Forecast for Marine Location Near Hamtramck, MI
Hourly EDIT Help
location: 42.38, -83.04 debug
Area Discussion for - Detroit/Pontiac, MI
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFXUS63 KDTX 222353 AFDDTX
Area Forecast Discussion National Weather Service Detroit/Pontiac MI 653 PM EST Fri Jan 22 2021
AVIATION.
High pressure builds slowly from the Midwest this evening into Lower Michigan and the Ohio valley during Saturday. NW low level wind diminishes while backing to the west during this time which keeps a supply of cold but increasingly dry air moving across the Great Lakes. Maintenance of low end VFR ceiling during the evening begins breaking up after midnight into Saturday morning before clearing Saturday afternoon. The possible exception is in the mbS area where WSW flow could direct some residual lake induced stratocu into the area, however the bulk of these clouds remain closer to the shoreline into Saturday evening.
For DTW . VFR clouds hold during the evening averaging a ceiling below 5000 ft. A decrease in coverage is expected late tonight into Saturday morning as the wind diminishes and high pressure brings increasingly dry air into the region.
DTW THRESHOLD PROBABILITIES .
* High for ceiling 5000 feet or less this evening. Moderate late tonight and low Saturday morning.
PREV DISCUSSION. Issued at 258 PM EST Fri Jan 22 2021
DISCUSSION .
Lake effect snow showers focused mainly south of M-59 will taper off to flurries and end this evening as the low level airmass dries out considerably as high pressure builds into the region from the west. Inversion heights will also drop notably into the overnight period which will further restrict the plume of lake moisture from Lake Michigan. The last of the snow showers will actually hold on over parts of the Thumb through the evening before tapering off during the overnight as banding from Lake Superior/northern Lake Michigan arc into the area over Saginaw Bay. With time, skies will also become partly cloudy which will allow temperatures to settle back into the lower teens despite a steady northwest to west wind. As the center of this high builds over the area on Saturday, expect partly cloudy skies to continue and cold conditions to remains with highs in the mid to upper 20s.
A weak shortwave impulse ejecting from a developing system over the southwest CONUS will be picked up by another northern stream wave as it pivots through the plains around the base of an upper low over central Canada. An period of isentropic ascent will arrive over the region early Sunday as the resulting trough axis shifts into the central Great Lakes. Expect light snow to expand into the region with this area of ascent, but with overall weak to modest forcing and limited moisture, generally do not expect much more than an inch of snow on average. At this time, the best lift is forecast over the northern forecast area where a few areas may over-achieve with 1 to 2 inches. This positioning would also lead to lower amounts less than an inch further south to the Michigan and Ohio state line.
The aforementioned storm system digging through California today on into the southwest CONUS this weekend will eject into the southern plains as the next Pacific shortwave crashes onshore along the west coast. This system will lift into the Ohio Valley early next week and provide the area with a chance of accumulating snow. The north to south orientation of this shortwave as it tracks into the area remains the main question as its northward progression is shunted by the central Canada upper low as it is sheared east over Ontario.
While confidence in not particularly high as of yet on how the interaction with this wave with the northern stream baroclinic zone will evolve, medium range model solutions seem to be converging on a track that supports a relatively narrow stripe of heavy snow over the northern Ohio Valley into parts of far southern lower Michigan. As was mentioned yesterday, the gradient between little/no snow and significant 4-6" or more snowfall will be very tight so small changes to the track of this system will lead to widely varying snowfall potential. Hence, the continued low confidence even knowing the system will be in close proximity to the area by late Monday/Monday night.
Once snowfall from this system winds down Tuesday morning, the remainder of the week appears to be dry as high pressure settles southeast into the Great Lakes from Canada. This high will also maintain seasonably cold conditions as highs reach the 20s to around 30 and lows dip in the teens.
MARINE .
Northwest winds of 20 to 30 knots over the Central Great Lakes this afternoon will continue into the evening, as a cold airmass is fully entrenched over the region, leading to deep mixing and snow squalls over Lake Huron. Winds could briefly reach higher values in the enhanced convergence zones. Freezing spray will also be around as temps fall into the upper teens to around 20 degrees. Winds look to be slow to diminish tonight over the marine waters, and it is possible small craft advisories for the northern tip of the Thumb region will be extended into Saturday. Will decide with the 10 PM forecast issuance.
Northwest flow will persist on Saturday, but winds will drop to 15 knots or less by the end of the day, with light and variable winds setting up Saturday evening-night as a ridge axis slides through.
Light southerly flow expected on Sunday as weak low pressure tracks through the northern Great Lakes through Sunday night. A period of light warm advection snow likely in this time frame, but visibility's probably remaining at or above 2 miles.
A much stronger low will lift into the Ohio Valley late Monday, and will lead to increasing east-northeast/onshore flow (up around 25 knots), and small craft advisories may be needed by Monday evening and continued into Tuesday. Snow will likely overspread Lake Erie and Lake St. Clair, and possibly as far north as southern third of lake Huron.
DTX WATCHES/WARNINGS/ADVISORIES.
MI . NONE.
Lake Huron . Small Craft Advisory until 5 AM EST Saturday for LHZ421-441-442.
Lake St Clair . NONE.
Michigan waters of Lake Erie . NONE.
AVIATION . BT DISCUSSION . DG MARINE . SF
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 mapStations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
CLSM4 - St. Clair Shores, MI | 11 mi | 53 min | NW 11 G 18 | 21°F | 1020 hPa (+2.1) | |||
AGCM4 | 32 mi | 53 min | 21°F | 36°F | 1018.8 hPa (+2.3) | |||
MBRM4 - 9014090 - Mouth of the Black River, MI | 53 mi | 53 min | 21°F | 1017.7 hPa (+2.2) |
Wind History for Toledo, OH
(wind in knots) EDIT (on/off)  Help9 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 | 6 PM | 7 PM | 8 PM | |
Last 24hr | W G19 | W G17 | W G16 | W G16 | W G14 | W G19 | W G16 | W G16 | W G13 | NW | NW G14 | W G22 | NW G19 | NW G14 | W | W G17 | W G18 | W G16 | NW G16 | NW G18 | NW G18 | W G15 | NW G19 | NW G18 |
1 day ago | SW G17 | SW G18 | S G19 | SW G22 | SW G22 | SW G17 | SW G19 | SW G21 | SW G17 | SW G16 | SW G16 | SW | SW G16 | W G17 | SW G16 | W G24 | W G24 | W G24 | W G25 | W G29 | W G24 | W G20 | W G17 | W G17 |
2 days ago | W G7 | W G10 | W G9 | W G10 | W G13 | NW G16 | NW G18 | NW G17 | NW G10 | NW | NW | W | W | SW G7 | SW G9 | SW G10 | W G12 | W G13 | SW G9 | S G15 | SW G16 | SW G19 | SW G14 | S G16 |
Airport Reports
EDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
Coleman A Young Municipal Airport, MI | 4 mi | 60 min | WNW 8 G 20 | 10.00 mi | Overcast | 21°F | 4°F | 47% | 1020.3 hPa |
Troy, Oakland/Troy Airport, MI | 13 mi | 58 min | NW 9 G 15 | 10.00 mi | Overcast | 21°F | 6°F | 52% | 1020 hPa |
Detroit, Detroit Metropolitan Wayne County Airport, MI | 19 mi | 60 min | NW 10 | 10.00 mi | Overcast | 21°F | 5°F | 50% | 1020.7 hPa |
Detroit/Grosse Ile, Grosse Ile Airport, MI | 20 mi | 58 min | NW 9 G 17 | 10.00 mi | Overcast | 22°F | 8°F | 53% | 1019.6 hPa |
Link to 5 minute data for KDET
Wind History from DET (wind in knots)
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 | 6 PM | 7 PM | 8 PM | |
Last 24hr | W G19 | W G23 | W G21 | NW G15 | W | W | W | W | NW G21 | NW G21 | NW G18 | W G20 | NW G19 | NW G16 | NW G17 | N | NW G19 | NW | NW G19 | NW G19 | NW G19 | NW | NW G17 | NW G20 |
1 day ago | SW G26 | SW G27 | SW G25 | SW G24 | SW G22 | SW G25 | SW G21 | SW G21 | SW | SW G19 | SW | SW | W | SW G21 | SW G20 | SW | W G23 | W G24 | W G24 | W G26 | W G22 | W G21 | W G28 | W G27 |
2 days ago | SW | W | W | W | N G17 | N G20 | NW | NW | NW | W | NW | W | SW | SW | W | W G15 | W | SW G17 | SW | SW | SW G20 | SW G23 | SW G25 | SW |
Tide / Current Tables for
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GEOS Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

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Ground Weather Radar Station
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