Thursday, April22, 2021
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Marine Weather and Tides
Saginaw, MI

Version 3.4
NOTICE
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 6:39AMSunset 8:28PM Thursday April 22, 2021 11:09 AM EDT (15:09 UTC) Moonrise 2:02PMMoonset 3:46AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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
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LHZ422 Inner Saginaw Bay Sw Of Point Au Gres To Bay Port Mi- 943 Am Edt Thu Apr 22 2021
Rest of today..West winds 10 to 15 knots. Partly cloudy. Waves 2 feet or less.
Tonight..Southwest winds 10 to 15 knots. Mostly clear. Waves 2 feet or less.
Friday..Southwest winds 10 to 15 knots. Mostly Sunny in the morning becoming partly cloudy. Waves 1 to 3 feet.
Friday night..Southwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and overnight. Partly cloudy in the evening becoming mostly cloudy. Waves 2 feet or less. SEe lake huron open lake forecast for days 3 through 5.
LHZ422 Expires:202104222115;;946455 FZUS53 KDTX 221343 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 943 AM EDT Thu Apr 22 2021 For waters within five nautical miles of shore 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. LHZ422-222115-


7 Day Forecast for Marine Location Near Saginaw, MI
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location: 43.42, -83.95     debug


Area Discussion for - Detroit/Pontiac, MI
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FXUS63 KDTX 221441 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 1041 AM EDT Thu Apr 22 2021

UPDATE.

Very cold airmass for late April standards (see RERMBS) remains in place, as 12z DTX sounding indicated a -9 C temp at 850 mb. Well mixed/deep boundary layer with westerly flow today, and there is just enough cape/super saturation with respect to ice in the 6-8 kft layer, which resides in the DGZ, to support a few flurries this morning. However, further drying/warming/subsidence this afternoon with the highly confluent upper level northerly flow should end activity as amplified upper level ridge axis builds into the western Great Lakes. Temperatures looks to reach around freezing again tonight, and will have to decide if freeze warning is warranted with the afternoon package. However, there is a pretty good surge of low level warm advection late tonight, and marginal nature may preclude issuance of it.

PREV DISCUSSION. Issued at 613 AM EDT Thu Apr 22 2021

AVIATION .

Scattered strato-cu dropping southeast into the area will fade, but SCT-BKN diurnal cumulus will then redevelop later this morning with bases aoa 5000 feet owing to the dry low level air mass in place. West northwest winds of 10 to 20 knots can be expected by midday with winds backing to the southwest tonight.

DTW THRESHOLD PROBABILITIES .

* Low for ceiling at 5000 ft from late morning into the afternoon.

PREV DISCUSSION . Issued at 338 AM EDT Thu Apr 22 2021

DISCUSSION .

Observations this morning show temperatures that have falling well into the 20s for most of southeast Michigan. Temperatures in the low 20s are currently being observed in Bad Axe. The combination of mostly clear skies and the resident cold airmass that moved into the region is supporting these sub freezing temperatures. The Freeze Warning for all of southeast Michigan will remain in place until 7 am. Daily minimum temperature records at a couple climate sites are at risk of being broken this morning, Flint (23 set in 2013) and Saginaw (25 set in 2013). Current observations at press time show Saginaw currently tied at the record and Flint within a few degrees. Detroit's record of 20 set in 1875 will not be in jeopardy of being broken.

Mid-upper level shortwave ridging will build into the western Great Lakes today while a surface high pressure drives across the Ohio River Valley. This will increase subsidence over the area resulting in limited cloud cover today. A tightening pressure gradient north of this high pressure will be enough to support some gusty afternoon conditions as diurnal mixing depths increase to around 2 km. Latest guidance is not quite as strong in regards to the gusts. Forecast wind gusts for this afternoon will be be around 20-25 mph. Westerly winds will begin to usher in warmer air across southeast Michigan throughout the day. More sunshine today will help daytime highs recover to around 50 degrees for most inland locations.

Continued warming trend into Friday as the ridge dampens and more zonal flow is present throughout the column. Temperatures at 850 mb improve to around 0C as the coldest air is shoved to the east. This will help daytime highs from Friday increase to around 60 degrees. A shortwave moving out of the desert southwest on Friday will generate a low pressure system that is forecast lift northeast out of the southern Mississippi River Valley and into the Ohio River Valley by Saturday evening. This system will bring the next chances for rainfall to southeast Michigan. Good entrance region jet dynamics and some interaction between the northern and southern stream jets will support precipitation up the frontal slope into southeast Michigan Saturday morning. Thermal profiles will be supportive of all rain. After a subtle cool down on Sunday in the wake of the system on Saturday, a longwave pattern shift across the CONUS will bring well above normal temperatures into the middle of next week.

MARINE .

Expansive area of high pressure will slide from the central Plains toward the east coast through the end of the week. Cool northwest flow will relax while backing to more westerly today while remaining generally below 20 knots. Winds then back to the southwest on Friday as the high reaches the east coast putting us on the northwest quadrant. We will remain on the northern periphery of this high until Saturday when the next low approaches the region from the southwest while a trough drops southeast into the region out of Canada.

DTX WATCHES/WARNINGS/ADVISORIES. MI . NONE. Lake Huron . NONE. Lake St Clair . NONE. Michigan waters of Lake Erie . NONE.

UPDATE . sf AVIATION . DG DISCUSSION . AA MARINE . AA

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SBLM4 - Saginaw Bay Light #1, MI 30 mi69 min WNW 18 G 22 35°F 1015.9 hPa (+0.7)
GSLM4 - Gravelly Shoals Light MI 47 mi89 min W 16 G 19 33°F 1016.3 hPa
TAWM4 - Tawas City, MI 63 mi89 min NW 8 G 16 37°F 1016.3 hPa

Wind History for Harbor Beach, MI
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N15
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G17
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N11
NE10
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1 day
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W11
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G20
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G21
NW11
G16
NW9
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G18
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SW13
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G22
W11
G15
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G21
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W9
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G14
W7
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NW6
G11
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G12
NW6
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G11
W9
G17
W8
G16
NW8
G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Saginaw County H W Browne Airport, MI5 mi74 minW 10 G 1410.00 miFair39°F27°F62%1016.9 hPa
MBS International Airport, MI10 mi76 minW 1210.00 miFair39°F27°F62%1017.8 hPa
Jack Barstow Airport, MI23 mi74 minW 10 G 1410.00 miPartly Cloudy39°F28°F64%1016.9 hPa

Link to 5 minute data for KHYX

Wind History from HYX (wind in knots)
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N11
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NW10NW12
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NW7NW7W6W6W6W5W6SW5W5SW5SW7SW8W14
G19
1 day agoNW8
G16
W8
G14
NW9W9NW6W7NW9NW4NW7N8N7N11N10N11
G15
NE4N6NW10NW9NW10N9
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NW5NW5NW9NW11
2 days agoSW14SW15
G24
W12
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W17SW17
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W11W13
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NW12NW10NW7W10W7W9W8W9W10W8
G18

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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.
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