National Weather Service United States Department of Commerce

Lake Effect Snow Warning and Winter Weather Advisories in effect for southern St. Lawrence and Franklin Counties through 7 PM Friday

Lake effect snow followed by upslope snow showers are expected to develop Thursday morning and persist through Thursday night, with total snow accumulations between 4 and 11 inches possible in the most persistent lake snow bands. Holiday travel could be very hazardous. Continue to monitor the latest forecasts for updates. Read More >

Latest Aviation Forecast Discussion
.AVIATION /07Z THURSDAY THROUGH MONDAY/...
Through 06Z Friday...A mix of MVFR and VFR conditions currently 
prevail across as a cold front exits the region, with all terminals 
expected to trend towards VFR. VFR conditions will continue to 
prevail across most terminals throughout the forecast period, 
although some MVFR ceilings and snow showers may impact KSLK and 
possibly KMSS as lake effect snow develops off Lake Ontario. Winds 
will become increasingly breezy out of the southwest in the wake of 
the cold front, with gusts of 20 to 30 knots possible throughout 
much of the forecast period.

Outlook...

Friday: Mainly VFR, with areas MVFR and IFR possible. Definite
SHSN.
Friday Night: Mainly VFR, with local MVFR possible. Chance SHSN.
Saturday: VFR. NO SIG WX.
Saturday Night: VFR. Slight chance SHSN.
Sunday: Mainly VFR, with areas MVFR and IFR possible. Definite
SHSN, Definite SHRA.
Sunday Night: Mainly MVFR, with local VFR possible. Chance SHRA,
Chance SHSN.
Monday: VFR. Chance SHRA, Slight chance SHSN.

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Expected Snowfall

Expected Snowfall

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Expected Ice Accumulation

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Convective SIGMETs

Convective SIGMETs

TFM Convective Forecast (TCF)

4-hr TCF

SPC Day 1 Convective Outlook

SPC Day 1 Convective Outlook

SPC Day 2 Convective Outlook

SPC Day 1 Convective Outlook

SPC Day 3 Convective Outlook

SPC Day 1 Convective Outlook

Current Icing SIGMETs

Icing SIGMETs

CIP/FIP Icing Guidance

CIP/FIP Icing Guidance

00-03 hr Icing AIRMETs

0-3 hr Icing AIRMETs

03-06 hr Icing AIRMETs

3-6 hr Icing AIRMETs

06-09 hr Icing AIRMETs

6-9 hr Icing AIRMETs

09-12 hr Icing AIRMETs

9-12 hr Icing AIRMETs

Current Turb SIGMETs

Turb SIGMETs

Turbulence Guidance (GTG)

GTG

00-03 hr Turb/LLWS AIRMETs

0-3 hr Turb/LLWS AIRMETs

03-06 hr Turb/LLWS AIRMETs

3-6 hr Turb/LLWS AIRMETs

06-09 hr Turb/LLWS AIRMETs

6-9 hr Turb/LLWS AIRMETs

09-12 hr Turb/LLWS AIRMETs

9-12 hr Turb/LLWS AIRMETs

00-03 hr Visibility AIRMETs

0-3 hr Visibility AIRMETs

03-06 hr Visibility AIRMETs

3-6 hr Visibility AIRMETs

06-09 hr Visibility AIRMETs

6-9 hr Visibility AIRMETs

09-12 hr Visibility AIRMETs

9-12 hr Visibility AIRMETs