Sunrise 5:51 AM   Sunset 7:52 PM Moonrise 8:59 PM   Moonset 5:57 AM

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SLZ024 Expires:202404241515;;280159 Fzus61 Kbuf 240745 Glfsl
forecast for the saint lawrence river including the thousand islands region national weather service buffalo ny 345 am edt Wed apr 24 2024
slz022-024-241515- saint lawrence river from cape vincent to saint regis 345 am edt Wed apr 24 2024
Today - Northwest winds increasing to 15 to 20 knots then becoming north 10 to 15 knots. Rain showers early, then clearing this afternoon.Tonight - North winds diminishing to less than 10 knots. Clear.Thursday - North winds 10 knots or less becoming west. Sunny.Thursday night - West winds less than 10 knots. Mainly clear. Friday - Light and variable winds becoming southeast 5 to 10 knots. Sunny. Saturday - Southeast winds 10 to 15 knots. A chance of showers during the day, then showers likely Saturday night. Sunday - South winds 10 to 15 knots. Showers likely.

SLZ005
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FXUS61 KBTV 241350 AFDBTV

Area Forecast Discussion National Weather Service Burlington VT 950 AM EDT Wed Apr 24 2024

SYNOPSIS
A strong cold front is sagging south with light to moderate rain showers over the region. Temperatures will drop throughout the day, and a brief period of snow is possible as precipitation tapers off. Only minor accumulations of snow are expected given a period of warm temperatures ahead of the falling snow. After one cool day on Thursday, conditions will begin to warm and become above normal for the new work week. Another interval of sharp drying takes place Thursday and Friday. Rain chances will return later Saturday into early next week.

NEAR TERM /THROUGH THURSDAY/
As of 941 AM EDT Wednesday...Quick update to the forecast to sharpen the temperature gradient as the front moves through the Saint Lawrence Valley. NY State Mesonet sites reporting temperatures already having fallen to the mid to upper 30s around Ogdensburg and Massena. With the colder temperatures, can expect some rain/snow mix even in the lower elevations as the front moves through today. Despite the possibility of a rain/snow mix, not expecting accumulating snow in the lower elevations today
Previous discussion follows

The anticipated sharp cold front now resides just west of the St. Lawrence Valley. Dry air has remained firm across Vermont, and we've seen little precipitation. Some high res guidance event indicates the potential for a broken line by morning as the boundary shifts into Vermont and 100- 200 J/kg of CAPE develops this afternoon. Perhaps a rumble of thunder could occur in Rutland and Windsor County, but have made no explicit mention. Overall, guidance is less bullish on cold air and pulled back on snowfall, and this is reasonable considering the warmth due to the lack of precipitation. There could still be a dusting around 1000 ft or higher, and maybe an inch for summits.
It will still be a sharp boundary with 5 to 10 degree drops in temperature over a 2 to 3 hour time frame with a fast switch from southwest to northwest winds.

The air mass coming in is very dry. Once the front is south, clouds will quickly clear out tonight. Cool northwest flow will bring temperatures into the teens across the Adirondacks and parts of the Northeast Kingdom, with low to mid 20s across the region. The only area that may hold onto 30s will be near Lake Champlain. Conditions on Thursday will be fairly cool with 40s, which is about 10 degrees below normal for this time of the year. Fortunately, it will not be too breezy, with mainly 10 to 15 mph northwest wind gusts. So it won't feel too raw. It will be very dry, though. Single digit to lower teen dewpoints will shift into the area. So more 20 to 30 percent relative humidity values in the afternoon are on the table, but today's rain and lack of winds will preclude fire weather concerns.

SHORT TERM /THURSDAY NIGHT THROUGH FRIDAY NIGHT/
As of 321 AM EDT Wednesday...Dry conditions will continue into Thursday evening as the region remains under the influence of high pressure. Clear skies and light winds are expected, which will allow for strong radiational cooling, making for a cold night. Overnight low temperatures will drop into the 20s to near freezing once again.

Another sunny and dry day will round out the work week as the region remains under high pressure. After a cold start to the day, daytime highs will climb into the 50s and low 60s, which will feel pleasant with the ample sunshine expected throughout the day. Winds will remain light throughout the day, which will help limit fire weather concerns. Another favorable raditional cooling night is expected for much of the night, before increasing clouds begin to move in.
Overnight lows will be cold but not as cold as the night prior, with temperatures in the mid 20s to 30s. The coldest spots will be across the Northeast Kingdom as clear skies will continue for most of the overnight hours.

LONG TERM /SATURDAY THROUGH TUESDAY/
As of 321 AM EDT Wednesday...Precipitation chances will increase as we head into the weekend into early next week as several shortwaves rotate into the region, as the upper level ridge shifts eastward and begins to flatten out. Much of Saturday looks to remain dry, with increasing chances of showers heading through the evening, although guidance is still fairly spread with the exact timing of these features and how quickly the ridge breaks down. The other thing to consider is the amount of dry air across the region these features will have to overcome for measurable precipitation. Given the uncertainty at this point, continued to stick with the NBM, with some showers expected Sunday into early next week. Temperatures will continue to warm up through the weekend, with highs in the 60s and low 70s by early next week. The warm temperatures and diurnal heating will allow for some instability to develop in the afternoons early next week, with the potential for some rumbles of thunder.

AVIATION /14Z WEDNESDAY THROUGH SUNDAY/
Through 12Z Thursday...The cold front is just west of the St.
Lawrence River. Most of the reductions to ceiling and visibility are near the boundary, and thus KMSS and KSLK are presently the only sites with MVFR. There have been intervals of IFR ceilings in there, and this could impact KSLK, KBTV, and KEFK. At KSLK and KEFK, there could be a brief transition to snow as cold air shifts in behind the front and before precipitation clears the area. Precipitation will quickly scattered out between 18z and 20z. Behind the front, a quick transition from south to southwest winds to northwest or north winds is expected and quickly clearing skies. Wind speeds will increase from 3 to 7 knots up to 8 to 13 knots behind the front with a few gusts 17 to 24 knots. After 00z, wind gusts will slowly subside, though could hang on longer at KMPV.

Outlook...

Thursday: VFR. NO SIG WX.
Thursday Night: VFR. NO SIG WX.
Friday: VFR. NO SIG WX.
Friday Night: VFR. NO SIG WX.
Saturday: VFR. Slight chance SHRA.
Saturday Night: Mainly MVFR, with areas VFR possible. Likely SHRA.
Sunday: Mainly MVFR, with local VFR possible. Chance SHRA.

BTV WATCHES/WARNINGS/ADVISORIES
VT...None.
NY...None.

Sorel
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Wed -- 05:49 AM EDT     Sunrise
Wed -- 05:53 AM EDT     Moonset
Wed -- 07:54 AM EDT     1.30 meters High Tide
Wed -- 11:25 AM EDT     1.29 meters Low Tide
Wed -- 06:52 PM EDT     1.33 meters High Tide
Wed -- 07:52 PM EDT     Sunset
Wed -- 09:01 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Sorel, Quebec, Tide feet

Islets Perces
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Wed -- 05:48 AM EDT     Sunrise
Wed -- 05:52 AM EDT     Moonset
Wed -- 06:17 AM EDT     0.96 meters High Tide
Wed -- 11:32 AM EDT     0.95 meters Low Tide
Wed -- 06:54 PM EDT     0.98 meters High Tide
Wed -- 07:51 PM EDT     Sunset
Wed -- 09:00 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION

Islets Perces, Quebec, Tide feet

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