Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:37AM||Sunset 8:29PM||Thursday August 17, 2017 1:46 AM EDT (05:46 UTC)||Moonrise 1:05AM||Moonset 4:11PM||Illumination 26%|
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|LHZ464 Lake Huron From Port Austin To Harbor Beach Beyond 5nm Off Shore- Lake Huron From Harbor Beach To Port Sanilac Beyond 5nm Off Shore- Lake Huron From Port Sanilac To Port Huron Beyond 5nm Off Shore- 940 Pm Edt Wed Aug 16 2017 |
Rest of tonight..East winds 5 to 10 knots becoming southeast 10 to 15 knots early in the morning. Waves 2 feet or less.
Thursday..Southeast winds 10 to 15 knots increasing to 15 to 20 knots late in the afternoon. A chance of showers and Thunderstorms in the morning. Rain showers and Thunderstorms likely in the afternoon. Waves 1 to 3 feet building to 3 to 5 feet in the late morning and afternoon.
Thursday night..Southeast winds 15 to 20 knots becoming south 10 to 15 knots in the late evening and overnight. Showers and Thunderstorms likely until early morning...then a chance of showers early in the morning. Waves 3 to 5 feet.
Friday..Southwest winds 15 to 20 knots. A chance of showers until late afternoon. Waves 3 to 5 feet.
Friday night..West winds 15 to 20 knots decreasing to 10 to 15 knots in the late evening and overnight. Waves 3 to 5 feet.
Saturday..West winds 10 to 15 knots decreasing to 5 to 10 knots late in the morning...then becoming light and variable late in the afternoon becoming southwest 5 to 10 knots late in the evening. Waves 2 to 4 feet subsiding to 2 feet or less late in the afternoon.
Sunday..Southwest winds 5 to 10 knots. Waves 2 feet or less.
Monday..Southwest winds 10 to 15 knots becoming south 5 to 10 knots. Waves 2 feet or less.
|LHZ464 Expires:201708170800;;498248 FZUS63 KDTX 170141 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 940 PM EDT Wed Aug 16 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...High pressure, 30.10 inches, will continue to push off towards upstate New York this evening. Low pressure over the central US will deepen to 29.60 inches as it lifts into southern Minnesota tonight. This low will then move to Upper Michigan by Thursday night, deepening to 29.50 inches. The low will force a warm front across Lower Michigan on Thursday, then into Lake Huron Thursday night. The low will slowly exit to the northeast of Lake Huron on Friday, with high pressure expected to expand across the southern Great Lakes on Saturday. LHZ462>464-170800-|
7 Day Forecast for Marine Location Near Lexington, MIHourly EDIT Help
Area Discussion for - Detroit/Pontiac, MI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 kdtx 170352|
area forecast discussion
national weather service detroit pontiac mi
1152 pm edt Wed aug 16 2017
Vfr conditions should hold much of the night. However, increasing
low level moisture in advance of a warm front will bring some light
fog potential and eventual MVFR CIGS with showers thundestorms on
Thursday morning. This stratus strato-cu should hold much of the day
as the front slowly lifts through lower michigan and another late
day round of scattered showers storms possible as a trough axis
pivots into area around low pressure to the north that is forcing
this front north through the area today. East southeast flow will
become southwest with the passage of the front with wind gusts on
the order of 20 knots or so.
For dtw... Low level moisture increases substantially late tonight
into Thursday morning with ceilings below 5kft on and off through
the balance of the forecast. Two possible waves of thunderstorms are
anticipated - one in the 12-16z window and the other during the mid-
late afternoon on Thursday. These window still seem reasonable and
first wave probably warrant an "upgrade" to tempo now that forecast
is inside of 9 hours from onset.
Dtw threshold probabilities...
* medium for ceilings at or below 5000 ft after 12z.
* medium for thunderstorms affecting the airspace Thursday morning,
but lower confidence for late afternoon activity at this time.
Issued at 341 pm edt Wed aug 16 2017
surface ridging tucked beneath weakly confluent mid level flow will
sustain deep layer dry and stable conditions heading into tonight.
Attention shifts to elongated shortwave energy now noted on water
vapor ejecting out of the rockies. This energy will consolidate into
a deeper wave within the next 24 hours as it settles into the upper
ms valley. The immediate kinematic response downstream will result a
substantial northward surge of moisture lodging within a deepening
southwest flow. The effective system relative isentropic ascent tied
to a burgeoning warm conveyor along the eastern flank will then
shift this moisture directly toward the great lakes on Thursday.
Cams model solutions are now indicating a progressive early response
locally along the advancing 850 mb warm frontal slope, with the lead
mid level theta-e gradient working to saturate the column and
potentially generating a scattered coverage of showers by the 08z-
11z window. Steady deep layer moisture flux and diminishing mid
level stability thereafter as the warm front lifts through will then
bring a higher probability for elevated convective development from
mid morning through the early afternoon hours. High moisture content
- pw over 2 inches - could certainly lead to some localized
regions of heavy rainfall.
A very moist warm sector will briefly intrude southeast michigan
late Thursday. Model guidance resoundingly push dewpoints of lower
70s up into the region within this narrow pre-cold frontal window.
Destabilization potential governed by the degree of removal and
overall exit timing of the early day cloud debris precip. Given the
moisture content, plausible this environment simply freely convects
with persistent pockets of weakly organized convection prior to the
arrival of the pre-frontal trough. This in turn would short circuit
the prospects of realizing better airmass recovery. In addition,
lapse rates will remain paltry given the moist profile, so there
remains a ceiling for potential instability despite the high
dewpoints. However, a more progressive exit of warm frontal debris|
could still allow for a moderate level of instability to emerge -
mlcape perhaps reaching 2000 j kg. Should this materialize, then
bulk shear in excess of 30 knots would support deep organized
updrafts. General signal for a multi-cell mode, with the prospects
for wet microbursts elevated given high CAPE density within heavily
precip loaded updrafts. In addition, heavy rainfall a definitive
threat. Greatest window for possible severe convection centered 21z-
Frontal passage Thursday night will sweep the deep moisture plume
eastward. Simply a subtle airmass change in terms of temperatures,
primarily noteworthy for the reduction in moisture content. A
moderately mixed profile up through 850 mb will support highs
ranging from mid 70s north to lower 80s south. A firm west-southwest
gradient contained within the southern bounds of a surface low
lifting north of lake huron will provide gusty conditions during the
daylight period. Just enough lingering moisture working through the
backside of this system to perhaps generate some isolated showers
across the north.
A broad surface high pressure system building east from iowa into
the ohio valley will look to keep conditions relatively dry
throughout the weekend, with the exception of Saturday morning and
afternoon, where troughing aloft with an embedded upper-level
disturbance will bring the chance for showers and thunderstorms.
Otherwise, both Sunday and Monday will look to stay on the dry side,
as south to southwesterly flow provides ample heat to push daytime
highs in the mid 80s, and possibly even the upper 80s across the
metro detroit area. The next chance for showers and thunderstorms
will return on Tuesday as a cold front pushes across the state. Dry
air will filter back in behind the front for the mid-week period, as
temperatures stay capped in the mid to upper 70s for a high.
southeast to south flow will increase substantially Thursday as a
storm system moves across the great lakes region. Showers and
thunderstorms are expected with this system on Thursday. Behind the
cold front, Thursday night, moderate southwest to west flow will
setup. The stronger winds will encourage higher waves to initially
setup in the southeast flow along the lake huron shoreline, then
transition to a more typical offshore flow setup with higher waves
in saginaw bay on Friday.
a very moist airmass will advance into southeast michigan during the
day Thursday. Scattered showers and thunderstorms are expected along
the incoming warm front. Additional showers and thunderstorms are
expected to develop in the moisture rich environment during the
afternoon and evening hours Thursday. Rainfall amounts in excess of
a half inch are possible with localized amounts exceeding one inch
with the strongest thunderstorms.
Dtx watches warnings advisories
Lake huron... Small craft advisory from 11 am Thursday to 8 pm edt Friday for
Lake st clair... None.
Michigan waters of lake erie... None.
discussion... Mr am
marine... ... .Mann
you can obtain your latest national weather service forecasts online
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|45149 - Southern Lake Huron||13 mi||47 min||SSE 9.7 G 12||71°F||70°F||1016.4 hPa (-0.1)|
|PSCM4||27 mi||47 min||SSE 12 G 14||71°F||1016.3 hPa (-1.0)|
|FTGM4 - 9014098 - Fort Gratiot, MI||31 mi||47 min||S 7 G 8.9||68°F||1015.8 hPa (-0.9)||60°F|
|MBRM4 - 9014090 - Mouth of the Black River, MI||33 mi||47 min||68°F||1015.7 hPa (-1.0)|
|HRBM4 - 9075014 - Harbor Beach, MI||47 mi||47 min||SE 11 G 13||71°F||1015.5 hPa (-0.8)||66°F|
Wind History for Fort Gratiot, MI(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|St Clair County International Airport, MI||39 mi||71 min||SE 3||10.00 mi||Fair||66°F||59°F||78%||1016.6 hPa|
Wind History from PHN (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NW||NW||NW||NE||NE||NE||N||NE||NE||NE||N||Calm||Calm||Calm||Calm||S|
|2 days ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||SE||SE||SE||SE||S||S||SE||S||S||S||SE||S||SE||SE||S||S||Calm|
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|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of GreatLakes EDIT
Wind Forecast for Detroit/Pontiac, MI (1,6,7,8)(on/off)  Help
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