Predicting autumn morning fog
 

Weather folks: I'm wondering if there's a way to predict if and where portions of the lake will be fogged-in on a fall morning.
The problem - I'm considering commuting to work a few mornings in September by boat from Bear Island. I did this last year too - one morning was fine but the next I had to wait almost 2 hours for the fog to lift so I could head to the marina. I rely on visual navigation - I don't own a special GPS for the lake - so being able to see where I'm going matters.

Watch dewpoint temperatures
 

Watch dewpoint temperatures vs air temperatures. The closer those two are, there is a likelihood of fog, especially with calm winds.

One point: using a GPS device to navigate in fog may keep you from hitting an island, a shoal area, e.t.c., but won't keep you from hitting another vessel doing the same thing! :rolleye1:

Dave

Fog
 

I use Raymarine gps and radar. My iphone Google Maps app also works ok as backup gps

I agree with UP. A cold calm morning in the fall usually does it. Even a mild breeze like 3 or 4 mph will clear the fog. Dead calm and cold then you will have a long wait for it to clear.

Several mornings each fall we go from Welch to Glendale in fog via GPS. We go slow both of us looking and listening for that other boat. Yes when following a GPS route in fog, the other boat is the real concern.

Sound signal
 

Per the NH Boating Guide, page 37 (I think), states that in reduced visibility, a powerboat should sound a prolonged blast at intervals not to exceed 2 minutes.

Dave

Try usairnet.com It's an aviation website that shows the ceiling (cloud height) and visibility (visual distance at ground level). This should tell you when fog is predicted, and when it should lift.

I find it to be very accurate, and useful for all recreational weather planning.

http://www.usairnet.com/cgi-bin/laun...te=NH&sta=KLCI

I commute regularly between Mark and Glendale and that early fog can be brutal. Some mornings it's clear between Mark and Bear, but when I come around Mink I can barely see the front of the boat! I have GPS on the pontoon, but not on the Chaparral. I downloaded an app to my phone called Fly to Map...it's a chart plotter. On a clear day, I turned it on and took a straight course to Glendale. The chart plotter makes a track which can be saved, then called up when it's needed. Keep the icon on the track, and it'll get you where you need to go, even through the thickest fog!

Sent from my SAMSUNG-SM-G930A using Winnipesaukee Forum mobile app

Kayakers and Radar...
 

While I don't own a kayak, curiosity drove me to Google—where I found this statement:

Fog and Radar
 

My Raymarine radar has alerted me twice to fishermen in front of me in the fog.

5:30 am today dew point 52 and air temp 53 at shore of Welch. Moderately thick fog over the lake. At 6 am light 2 to 4 mph breeze. 6:15 am fog gone.