Saturday, September23, 2017 L-36.com


Marine Weather and Tides
Haslett, MI

Version 3.4
What's New / NOTES
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 7:25AMSunset 7:33PM Saturday September 23, 2017 7:06 AM EDT (11:06 UTC) Moonrise 9:47AMMoonset 8:42PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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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This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ423 /o.exp.kdtx.ma.w.0050.000000t0000z-170904t2300z/ 652 Pm Edt Mon Sep 4 2017
.the special marine warning will expire at 700 pm edt... The affected areas were... Detroit river... Lake st. Clair open lake (u.s. Portion)... St. Clair river... While Thunderstorms have weakened significantly, expect occasional lightning and heavy downpours along with isolated wind gusts to near 30 knots. A severe Thunderstorm watch remains in effect until 1100 pm edt for southeastern michigan. Lat...lon 4262 8252 4255 8258 4254 8266 4238 8282 4232 8307 4224 8313 4211 8313 4210 8322 4225 8318 4233 8311 4239 8294 4244 8291 4254 8291 4259 8285 4266 8285 4272 8269 4270 8261 4264 8256 4274 8252 4275 8248 time...mot...loc 2250z 262deg 50kt 4283 8189 4228 8280
This is a Weather Statement Zone, please check the Date to see if it has expired
LCZ423 Expires:201709042300;;893398 FZUS73 KDTX 042252 MWSDTX MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 652 PM EDT MON SEP 4 2017 LCZ422-423-460-042300-

7 Day Forecast for Marine Location Near Haslett, MI
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location: 42.74, -84.4     debug


Area Discussion for - Grand Rapids, MI
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Fxus63 kgrr 230729
afdgrr
area forecast discussion
national weather service grand rapids mi
329 am edt Sat sep 23 2017
latest update...

synopsis short term long term marine

Synopsis
Issued at 329 am edt Sat sep 23 2017
hot and humid weather will continue into Tuesday before
a cold front comes through the area on Wednesday bringing
in cooler air. A stronger cold front will bring showers
and thunderstorms with much cooler air in Thursday into
Friday.

Short term (today through Monday)
issued at 329 am edt Sat sep 23 2017
the primary issue will be the heat and humidity into Monday.

With a building upper level high over the area, I expect little
in the way of cloud cover and no change in airmass through Monday
so what we had the past two days should continue into Monday. The
models continue to show the 1000 925 and 1000 850 thickness just
as warm this afternoon as the past two afternoons so no reason to
believe it will be any cooler. Thus expect highs in the lower to
mid 90s and heat index values between 95 and 100 degrees this
afternoon.

The models do show a slow cooling trend starting Sunday but with
the upper high holding as it does the cooling seems questionable.

As a result I kept highs significantly warmer than any of our mos
output would suggest. Highs will stay in the lower to mid 90s
Sunday and Monday.

The upper level high will result in enough subsidence at mid
levels so that convection in the afternoon should be suppressed.

Even so I have 5 to 10 pct pop inland of us-131 just in case.

Long term (Monday night through Friday)
issued at 329 am edt Sat sep 23 2017
the upper high will slowly drift to the east by Tuesday. This will
let a weak front to move into SW mi. Not much moisture with the
front as the upper high will still prevent any gulf moisture to be
entrained. It seems that we will only see very hit and miss
showers storms with the front given this lack of moisture. One more
hot day on Tuesday, then we chill down.

A more zonal flow develops by Wed wed night, while we see northerly
low level flow develop in the wake of the weak front. Some timing
differences with the front, but temps should turn some 10 to 15
degrees cooler in this period.

We should continue to see progressively cooler temps into the latter
portion of the week. By Thu Fri an upper trough deepens over the
great lakes. And along with a persistent northerly flow in the low
levels, h8 temps fall to around +2c by Friday. Highs by Friday
should only be in the lower 60s. The upper trough will also bring
the best chance of rain in the extended period, with showers
arriving Thu night and lasting into Friday morning.

Aviation (for the 06z tafs through 06z Saturday night)
issued at 123 am edt Sat sep 23 2017
vfr conditions are likely through most of the next 24 hours. We
will see patchy fog around daybreak today, but this should be
brief (2 to 4 hours at any one location). And vsbys will likely
only go down to MVFR with patchy ifr.

Marine
Issued at 329 am edt Sat sep 23 2017
high pressure will result in light winds and mostly clear skies so
i see no marine issues till the cold front gets closer to the area
the middle of next week.

Hydrology
Issued at 1054 am edt Fri sep 22 2017
rivers are running around normal to below normal for the time of
year. Meanwhile, the us drought monitor is indicating dry conditions
across southern lower michigan. Isolated thunderstorms may develop
during the afternoon and early evening near i-69. Near-record warmth
is expected today through the weekend. The next chance for rain is
Wednesday. No river issues are expected through next week.

Grr watches warnings advisories
Mi... None.

Lm... None.

Synopsis... Wdm
short term... Wdm
long term... Jk
aviation... Jk
hydrology... 63
marine... Wdm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SBLM4 - Saginaw Bay Light #1, MI 82 mi67 min SW 8.9 G 9.9 71°F 1017.9 hPa (+1.3)
CLSM4 - St. Clair Shores, MI 83 mi67 min WSW 1 G 1.9 68°F 1019.6 hPa (+0.6)
THRO1 - 9063085 - Toledo, OH 87 mi49 min Calm G 2.9 67°F 1019.3 hPa64°F

Wind History for Toledo, OH
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Capital Region International Airport, MI11 mi74 minN 09.00 miFair67°F62°F84%1018.6 hPa
Mason, Mason Jewett Field Airport, MI12 mi75 minN 010.00 miFair67°F63°F87%1019.3 hPa
Owosso, Owosso Community Airport, MI22 mi72 minN 07.00 miFair64°F62°F95%1019 hPa
Howell, Livingston County Airport, MI24 mi72 minN 010.00 miFair65°F62°F92%1019.3 hPa

Wind History from LAN (wind in knots)
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Last 24hrCalmCalmSW4Calm4Calm3NE3E4SE4W3CalmCalmCalmS4CalmW4CalmCalmSE3CalmCalmCalmE4
1 day agoS5S6S6S7SW8S6SW8SW11SW10NE20
G25
NW7E5E7CalmSE4W4CalmE3CalmE3CalmSE4SE4SE3
2 days agoCalmS5S3SW5S5SE5--5SW8SW5S7S5S4SE5SE8S7SE6SE6SE7SE8SE6SE5S4Calm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Grand Rapids, MI (7,2,3,4)
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Ground Weather Radar Station Detroit, MI
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.