Alert archive / New York / Winter Storm Watches in 2020
Winter Storm Watch 11, NWS Buffalo, NY
NWS Buffalo, NY issued this winter storm watch at Dec 21, 2020, 2:18 PM EST for 8 counties in New York. It took effect at Dec 24, 2020, 7:00 PM EST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 21, 2020, 2:18 PM EST (19:18 UTC)
- In effect from
- Dec 24, 2020, 7:00 PM EST
- Expired
- Dec 24, 2020, 6:41 PM EST
- In force
- Issued by
- NWS Buffalo, NY
Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Jefferson County, NY, Lewis County, NY, Oswego County, NY, Wyoming County, NY
The radar
The Buffalo radar (KBUF), 91 km from the middle of the area, began a volume at 19:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.3 hours before the alert went out and 88 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
112 WWUS41 KBUF 211918 WSWBUF URGENT - WINTER WEATHER MESSAGE National Weather Service Buffalo NY 218 PM EST Mon Dec 21 2020 NYZ010>012-019-020-085-220330- /O.NEW.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/ Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus- Southern Erie- Including the cities of Buffalo, Batavia, Warsaw, Jamestown, Olean, Orchard Park, and Springville 218 PM EST Mon Dec 21 2020 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than 9 inches possible in the most persistent lake snows. Winds could gust as high as 35 mph. * WHERE...Erie, Genesee, Wyoming, Chautauqua, and Cattaraugus counties. * WHEN...From Thursday evening through Saturday afternoon. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ NYZ006>008-220330- /O.NEW.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/ Oswego-Jefferson-Lewis- Including the cities of Oswego, Watertown, and Lowville 218 PM EST Mon Dec 21 2020 ...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than 9 inches possible in the most persistent lake snows. * WHERE...The Eastern Lake Ontario Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$
12 follow-up statements
818 WWUS41 KBUF 220234 WSWBUF URGENT - WINTER WEATHER MESSAGE National Weather Service Buffalo NY 934 PM EST Mon Dec 21 2020 NYZ010>012-019-020-085-221045- /O.CON.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/ Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus- Southern Erie- Including the cities of Buffalo, Batavia, Warsaw, Jamestown, Olean, Orchard Park, and Springville 934 PM EST Mon Dec 21 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. Winds could gust as high as 35 mph. * WHERE...Erie, Genesee, Wyoming, Chautauqua, and Cattaraugus counties. * WHEN...From Thursday evening through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ NYZ006>008-221045- /O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/ Oswego-Jefferson-Lewis- Including the cities of Oswego, Watertown, and Lowville 934 PM EST Mon Dec 21 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. * WHERE...The Eastern Lake Ontario Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ Hitchcock
221 WWUS41 KBUF 220929 WSWBUF URGENT - WINTER WEATHER MESSAGE National Weather Service Buffalo NY 429 AM EST Tue Dec 22 2020 NYZ010>012-019-020-085-221730- /O.CON.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/ Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus- Southern Erie- Including the cities of Buffalo, Batavia, Warsaw, Jamestown, Olean, Orchard Park, and Springville 429 AM EST Tue Dec 22 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. Winds could gust as high as 35 mph. * WHERE...Erie, Genesee, Wyoming, Chautauqua, and Cattaraugus counties. * WHEN...From Thursday evening through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ NYZ006>008-221730- /O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/ Oswego-Jefferson-Lewis- Including the cities of Oswego, Watertown, and Lowville 429 AM EST Tue Dec 22 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. * WHERE...The Eastern Lake Ontario Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ TMA
730 WWUS41 KBUF 221709 WSWBUF URGENT - WINTER WEATHER MESSAGE National Weather Service Buffalo NY 1209 PM EST Tue Dec 22 2020 NYZ010>012-019-020-085-230115- /O.CON.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/ Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus- Southern Erie- Including the cities of Buffalo, Batavia, Warsaw, Jamestown, Olean, Orchard Park, and Springville 1209 PM EST Tue Dec 22 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. Winds could gust as high as 35 mph. * WHERE...Erie, Genesee, Wyoming, Chautauqua, and Cattaraugus counties. * WHEN...From Thursday evening through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ NYZ006>008-230115- /O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/ Oswego-Jefferson-Lewis- Including the cities of Oswego, Watertown, and Lowville 1209 PM EST Tue Dec 22 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. * WHERE...The Eastern Lake Ontario Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$
926 WWUS41 KBUF 230048 WSWBUF URGENT - WINTER WEATHER MESSAGE National Weather Service Buffalo NY 748 PM EST Tue Dec 22 2020 NYZ010>012-019-020-085-230900- /O.CON.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/ Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus- Southern Erie- Including the cities of Buffalo, Batavia, Warsaw, Jamestown, Olean, Orchard Park, and Springville 748 PM EST Tue Dec 22 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. Winds could gust as high as 35 mph. * WHERE...Erie, Genesee, Wyoming, Chautauqua, and Cattaraugus counties. * WHEN...From Thursday evening through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ NYZ006>008-230900- /O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/ Oswego-Jefferson-Lewis- Including the cities of Oswego, Watertown, and Lowville 748 PM EST Tue Dec 22 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. * WHERE...The Eastern Lake Ontario Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$
450 WWUS41 KBUF 230910 WSWBUF URGENT - WINTER WEATHER MESSAGE National Weather Service Buffalo NY 410 AM EST Wed Dec 23 2020 NYZ010>012-019-020-085-231715- /O.CON.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/ Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus- Southern Erie- Including the cities of Buffalo, Batavia, Warsaw, Jamestown, Olean, Orchard Park, and Springville 410 AM EST Wed Dec 23 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. Winds could gust as high as 35 mph. * WHERE...Erie, Genesee, Wyoming, Chautauqua, and Cattaraugus counties. * WHEN...From Thursday evening through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ NYZ006>008-231715- /O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/ Oswego-Jefferson-Lewis- Including the cities of Oswego, Watertown, and Lowville 410 AM EST Wed Dec 23 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. * WHERE...The Eastern Lake Ontario Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ TMA
043 WWUS41 KBUF 231706 WSWBUF URGENT - WINTER WEATHER MESSAGE National Weather Service Buffalo NY 1206 PM EST Wed Dec 23 2020 NYZ010>012-019-020-085-240115- /O.CON.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/ Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus- Southern Erie- Including the cities of Buffalo, Batavia, Warsaw, Jamestown, Olean, Orchard Park, and Springville 1206 PM EST Wed Dec 23 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. Winds could gust as high as 35 mph. * WHERE...Erie, Genesee, Wyoming, Chautauqua, and Cattaraugus counties. * WHEN...From Thursday evening through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ NYZ006>008-240115- /O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/ Oswego-Jefferson-Lewis- Including the cities of Oswego, Watertown, and Lowville 1206 PM EST Wed Dec 23 2020 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... * WHAT...Heavy lake effect snow possible. Total snow accumulations of more than a foot possible in the most persistent lake snows. * WHERE...The Eastern Lake Ontario Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult at times with snow covered roads and poor visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Narrow bands of heavy snow could impact portions of the region. Localized travel problems will be possible. && $$ Reynolds
123
WWUS41 KBUF 231919
WSWBUF
URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
219 PM EST Wed Dec 23 2020
NYZ019-240330-
/O.UPG.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/
/O.NEW.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Chautauqua-
Including the city of Jamestown
219 PM EST Wed Dec 23 2020
...WINTER STORM WARNING IN EFFECT FROM 7 PM THURSDAY TO 7 PM EST
SATURDAY...
* WHAT...Heavy snow expected. This will initially be widespread
wet snow Thursday night, followed more localized lake effect
snow Friday into Saturday. There may be a break in the snowfall Friday
before the lake effect snow kicks in. Total snow accumulations
of 9 to 18 inches. Lower accumulations of 4 to 9 inches are
expected along and south of I-86. Winds gusting as high as 40
mph.
* WHERE...Chautauqua county.
* WHEN...From 7 PM Thursday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow will create dangerous travel
conditions.
Submit snow reports through our website or social media.
&&
$$
NYZ020-085-240330-
/O.UPG.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/
/O.NEW.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Cattaraugus-Southern Erie-
Including the cities of Olean, Orchard Park, and Springville
219 PM EST Wed Dec 23 2020
...WINTER STORM WARNING IN EFFECT FROM 7 PM THURSDAY TO 7 PM EST
SATURDAY...
* WHAT...Heavy snow expected. This will initially be widespread
wet snow Thursday night, followed more localized lake effect
snow Friday into Saturday. There may be a break in the snowfall
Friday before the lake effect snow kicks in. Total snow
accumulations of 11 to 22 inches. Lower accumulations of 3-7
inches are expected over the southwest half of Cattaraugus
County. Winds gusting as high as 35 mph.
* WHERE...Cattaraugus and Southern Erie counties.
* WHEN...From 7 PM Thursday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow will create dangerous travel
conditions.
Submit snow reports through our website or social media.
&&
$$
NYZ010>012-240330-
/O.UPG.KBUF.WS.A.0011.201225T0000Z-201226T1800Z/
/O.NEW.KBUF.LE.W.0007.201225T1700Z-201227T0000Z/
Northern Erie-Genesee-Wyoming-
Including the cities of Buffalo, Batavia, and Warsaw
219 PM EST Wed Dec 23 2020
...LAKE EFFECT SNOW WARNING IN EFFECT FROM NOON FRIDAY TO 7 PM
EST SATURDAY...
* WHAT...Heavy lake effect snow expected. Lake snows will develop
over southwest NY during the day and move north and intensify
during the afternoon. Snow will be heaviest during the evening
before lake bands move back toward the south on Saturday. Total
snow accumulations of 7 to 17 inches in the most persistent lake
snows. Lower accumulations of 3-7 inches are expected over
eastern portions of Genesee and Wyoming counties. Winds gusting
as high as 35 mph.
* WHERE...Northern Erie, Genesee, and Wyoming counties.
* WHEN...From noon Friday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.
Submit snow reports through our website or social media.
&&
Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4280 7848 4293 7845 4301 7869 4293 7897
4279 7890 4253 7939 4251 7920 4260 7893 4262 7869
4267 7856
TIME Y20M12D25T1800Z-Y20M12D26T0600Z
COORD...4276 7825 4288 7844 4291 7879 4279 7890
4270 7909 4249 7942 4255 7909 4249 7870 4257 7840
4264 7823
TIME Y20M12D26T0600Z-Y20M12D27T0000Z
$$
NYZ006>008-240330-
/O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
219 PM EST Wed Dec 23 2020
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT
THROUGH SATURDAY AFTERNOON...
* WHAT...Heavy lake effect snow possible. Total snow
accumulations of more than a foot possible in the most
persistent lake snows.
* WHERE...The Eastern Lake Ontario Region.
* WHEN...From late Thursday night through Saturday afternoon.
* IMPACTS...Travel could be very difficult at times with snow
covered roads and poor visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Narrow bands of heavy snow could impact portions of the region.
Localized travel problems will be possible.
&&
$$780
WWUS41 KBUF 232152
WSWBUF
URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
452 PM EST Wed Dec 23 2020
NYZ019-240600-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Chautauqua-
Including the city of Jamestown
452 PM EST Wed Dec 23 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THURSDAY TO
7 PM EST SATURDAY...
* WHAT...Heavy snow expected. This will initially be widespread
wet snow Thursday night, followed more localized lake effect
snow Friday into Saturday. There may be a break in the snowfall
Friday before the lake effect snow kicks in. Total snow
accumulations of 9 to 18 inches. Lower accumulations of 4 to 9
inches are expected along and south of I-86. Winds gusting as
high as 40 mph.
* WHERE...Chautauqua county.
* WHEN...From 7 PM Thursday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow will create dangerous travel
conditions.
Submit snow reports through our website or social media.
&&
$$
NYZ020-085-240600-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Cattaraugus-Southern Erie-
Including the cities of Olean, Orchard Park, and Springville
452 PM EST Wed Dec 23 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THURSDAY TO
7 PM EST SATURDAY...
* WHAT...Heavy snow expected. This will initially be widespread
wet snow Thursday night, followed more localized lake effect
snow Friday into Saturday. There may be a break in the snowfall
Friday before the lake effect snow kicks in. Total snow
accumulations of 11 to 22 inches. Lower accumulations of 3-7
inches are expected over the southwest half of Cattaraugus
County. Winds gusting as high as 35 mph.
* WHERE...Cattaraugus and Southern Erie counties.
* WHEN...From 7 PM Thursday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow will create dangerous travel
conditions.
Submit snow reports through our website or social media.
&&
$$
NYZ010>012-240600-
/O.CON.KBUF.LE.W.0007.201225T1700Z-201227T0000Z/
Northern Erie-Genesee-Wyoming-
Including the cities of Buffalo, Batavia, and Warsaw
452 PM EST Wed Dec 23 2020
...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
7 PM EST SATURDAY...
* WHAT...Heavy lake effect snow expected. Lake snows will develop
over southwest NY during the day and move north and intensify
during the afternoon. Snow will be heaviest during the evening
before lake bands move back toward the south on Saturday. Total
snow accumulations of 9 to 17 inches in the most persistent
lake snows. Lower accumulations of 3-7 inches are expected over
eastern portions of Genesee and Wyoming counties. Winds gusting
as high as 35 mph.
* WHERE...Northern Erie, Genesee, and Wyoming counties.
* WHEN...From noon Friday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the evening commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.
Submit snow reports through our website or social media.
&&
Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4275 7894 4299 7866 4298 7878 4288 7889
4298 7884 4273 7900 4297 7893 4274 7903 4258 7929
4251 7939 4253 7915 4258 7902 4261 7878 4266 7889
TIME Y20M12D25T1800Z-Y20M12D26T0600Z
COORD...4295 7825 4305 7834 4303 7862 4299 7866
4298 7878 4292 7888 4268 7892 4264 7887 4261 7863
4263 7854 4267 7853 4273 7841 4277 7840 4282 7827
TIME Y20M12D25T1800Z-Y20M12D26T0600Z
COORD...4264 7869 4289 7877 4288 7889 4279 7890
4258 7929 4251 7942 4250 7930 4257 7909 4252 7903
4249 7870 4254 7850 4262 7869 4259 7831 4261 7831
TIME Y20M12D26T0600Z-Y20M12D27T0000Z
COORD...4288 7817 4292 7819 4300 7830 4298 7854
4291 7879 4271 7873 4266 7868 4255 7867 4254 7858
4257 7843 4260 7843 4260 7828 4269 7823 4269 7820
TIME Y20M12D26T0600Z-Y20M12D27T0000Z
$$
NYZ006>008-240600-
/O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
452 PM EST Wed Dec 23 2020
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT
THROUGH SATURDAY AFTERNOON...
* WHAT...Heavy lake effect snow possible. Total snow
accumulations of more than a foot possible in the most
persistent lake snows.
* WHERE...The Eastern Lake Ontario Region.
* WHEN...From late Thursday night through Saturday afternoon.
* IMPACTS...Travel could be very difficult. The hazardous
conditions could impact the morning or evening commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Narrow bands of heavy snow could impact portions of the region.
Localized travel problems will be possible.
&&
$$
Reynolds931
WWUS41 KBUF 240047
WSWBUF
URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
747 PM EST Wed Dec 23 2020
NYZ019-240900-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Chautauqua-
Including the city of Jamestown
747 PM EST Wed Dec 23 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THURSDAY TO
7 PM EST SATURDAY...
* WHAT...Heavy snow expected. This will initially be widespread
wet snow Thursday night, followed more localized lake effect
snow Friday into Saturday. There may be a break in the
snowfall Friday before the lake effect snow kicks in. Total
snow accumulations of 9 to 18 inches. Lower accumulations of 4
to 9 inches are expected along and south of I-86. Winds
gusting as high as 40 mph.
* WHERE...Chautauqua county.
* WHEN...From 7 PM Thursday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow will create dangerous travel
conditions.
Submit snow reports through our website or social media.
&&
$$
NYZ020-085-240900-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Cattaraugus-Southern Erie-
Including the cities of Olean, Orchard Park, and Springville
747 PM EST Wed Dec 23 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THURSDAY TO
7 PM EST SATURDAY...
* WHAT...Heavy snow expected. This will initially be widespread
wet snow Thursday night, followed more localized lake effect
snow Friday into Saturday. There may be a break in the
snowfall Friday before the lake effect snow kicks in. Total
snow accumulations of 11 to 22 inches. Lower accumulations of
3-7 inches are expected over the southwest half of Cattaraugus
County. Winds gusting as high as 35 mph.
* WHERE...Cattaraugus and Southern Erie counties.
* WHEN...From 7 PM Thursday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow will create dangerous travel
conditions.
Submit snow reports through our website or social media.
&&
$$
NYZ010>012-240900-
/O.CON.KBUF.LE.W.0007.201225T1700Z-201227T0000Z/
Northern Erie-Genesee-Wyoming-
Including the cities of Buffalo, Batavia, and Warsaw
747 PM EST Wed Dec 23 2020
...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
7 PM EST SATURDAY...
* WHAT...Heavy lake effect snow expected. Lake snows will
develop over southwest NY during the day and move north and
intensify during the afternoon. Snow will be heaviest during
the evening before lake bands move back toward the south on
Saturday. Total snow accumulations of 9 to 17 inches in the
most persistent lake snows. Lower accumulations of 3-7 inches
are expected over eastern portions of Genesee and Wyoming
counties. Winds gusting as high as 35 mph.
* WHERE...Northern Erie, Genesee, and Wyoming counties.
* WHEN...From noon Friday to 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the evening commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.
Submit snow reports through our website or social media.
&&
Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4285 7833 4298 7830 4303 7834 4303 7862
4297 7895 4279 7890 4274 7903 4247 7948 4249 7919
4269 7850
TIME Y20M12D25T1800Z-Y20M12D26T0600Z
COORD...4260 7822 4281 7818 4300 7833 4300 7851
4288 7889 4277 7893 4232 7975 4201 7973 4211 7956
4232 7877
TIME Y20M12D26T0600Z-Y20M12D27T0000Z
$$
NYZ006>008-240900-
/O.CON.KBUF.WS.A.0011.201225T0600Z-201226T1800Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
747 PM EST Wed Dec 23 2020
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT
THROUGH SATURDAY AFTERNOON...
* WHAT...Heavy lake effect snow possible. Total snow
accumulations of more than a foot possible in the most
persistent lake snows.
* WHERE...The Eastern Lake Ontario Region.
* WHEN...From late Thursday night through Saturday afternoon.
* IMPACTS...Travel could be very difficult. The hazardous
conditions could impact the morning or evening commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Narrow bands of heavy snow could impact portions of the region.
Localized travel problems will be possible.
&&
$$604
WWUS41 KBUF 240852
WSWBUF
URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
352 AM EST Thu Dec 24 2020
NYZ010>012-241700-
/O.NEW.KBUF.WW.Y.0027.201225T0000Z-201225T1700Z/
/O.CON.KBUF.LE.W.0007.201225T1700Z-201227T0000Z/
Northern Erie-Genesee-Wyoming-
Including the cities of Buffalo, Batavia, and Warsaw
352 AM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
NOON EST FRIDAY...
...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
7 PM EST SATURDAY...
* WHAT...For the Lake Effect Snow Warning, heavy lake effect snow
expected. Total snow accumulations of 9 to 18 inches in the most
persistent lake snows. Winds gusting as high as 35 mph will
produce blowing and drifting snow. For the Winter Weather
Advisory, snow and mixed precipitation expected. Total snow
accumulations of 2 to 5 inches, greatest in western portions of
the area. Ice accumulations of up to one tenth of an inch.
* WHERE...Northern Erie, Genesee, and Wyoming counties.
* WHEN...For the Lake Effect Snow Warning, from noon Friday to 7
PM EST Saturday. Heaviest lake effect snow expected Friday night
through Saturday morning. For the Winter Weather Advisory, from
7 PM this evening to noon EST Friday. Rain will transition to a
wintry mix this evening, then snow overnight.
* IMPACTS...Travel will be very difficult. Accumulating snow and
mixed precipitation tonight through early Friday will result in
very slippery roads. Heavy lake effect snow will then result in
deep snow cover on roads and poor visibility Friday night
through Saturday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4282 7820 4297 7819 4307 7831 4302 7877
4293 7897 4275 7897 4232 7975 4229 7972 4258 7898
4270 7838
TIME Y20M12D26T0000Z-Y20M12D26T1200Z
COORD...4290 7838 4307 7831 4310 7843 4304 7873
4297 7893 4281 7890 4258 7929 4266 7892 4272 7879
4281 7866
TIME Y20M12D26T1200Z-Y20M12D27T0000Z
$$
NYZ019-241700-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Chautauqua-
Including the city of Jamestown
352 AM EST Thu Dec 24 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 7 PM EST SATURDAY...
* WHAT...Heavy snow and mixed precipitation expected. Total snow
accumulations of 9 to 18 inches and ice accumulations of around
one tenth of an inch. Winds gusting as high as 40 mph will
produce blowing and drifting snow Friday night.
* WHERE...Chautauqua county.
* WHEN...From 7 PM this evening to 7 PM EST Saturday. Rain will
change to a wintry mix early this evening, then snow late this
evening.
* IMPACTS...Travel will be very difficult. Accumulating snow and
mixed precipitation tonight through early Friday will result in
very slippery roads. Heavy lake effect snow will then result in
deep snow cover on roads and poor visibility Friday and Friday
evening.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow and ice will create dangerous travel
conditions.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ020-085-241700-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Cattaraugus-Southern Erie-
Including the cities of Olean, Orchard Park, and Springville
352 AM EST Thu Dec 24 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 7 PM EST SATURDAY...
* WHAT...Heavy snow and mixed precipitation expected. Total snow
accumulations of 9 to 18 inches and ice accumulations of around
one tenth of an inch. Winds gusting as high as 35 mph will
produce blowing and drifting snow.
* WHERE...Cattaraugus and Southern Erie counties.
* WHEN...From 7 PM this evening to 7 PM EST Saturday. Rain will
change to a wintry mix this evening, then to snow overnight.
Lake effect snow will develop Friday and continue through
Saturday.
* IMPACTS...Travel will be very difficult. Accumulating snow and
mixed precipitation tonight through early Friday will result in
very slippery roads. Heavy lake effect snow will then result in
deep snow cover on roads and poor visibility Friday night
through Saturday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow and ice will create dangerous travel
conditions.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ001-002-241700-
/O.NEW.KBUF.WW.Y.0027.201225T0000Z-201225T1700Z/
Niagara-Orleans-
Including the cities of Niagara Falls and Medina
352 AM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
NOON EST FRIDAY...
* WHAT...Snow and mixed precipitation expected. Total snow
accumulations of 2 to 5 inches, greatest over Niagara County.
Ice accumulations of up to one tenth of an inch.
* WHERE...Niagara and Orleans counties.
* WHEN...From 7 PM this evening to noon EST Friday. Rain will
change to a wintry mix this evening, then to snow overnight.
* IMPACTS...Plan on very slippery road conditions due to the
combination of mixed precipitation and snow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ003-013-021-241700-
/O.NEW.KBUF.WW.Y.0027.201225T0400Z-201225T1700Z/
Monroe-Livingston-Allegany-
Including the cities of Rochester, Geneseo, and Wellsville
352 AM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO
NOON EST FRIDAY...
* WHAT...Mixed precipitation expected. Total snow accumulations
of an inch or less and ice accumulations of around one tenth
of an inch.
* WHERE...Monroe, Livingston, and Allegany counties.
* WHEN...From 11 PM this evening to noon EST Friday. Rain will
change to a wintry mix from west to east overnight.
* IMPACTS...Plan on very slippery road conditions.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ006>008-241700-
/O.EXT.KBUF.WS.A.0011.201226T0000Z-201227T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
352 AM EST Thu Dec 24 2020
...WINTER STORM WATCH NOW IN EFFECT FROM FRIDAY EVENING THROUGH
SUNDAY MORNING...
* WHAT...Heavy lake effect snow possible. Total snow
accumulations of 9 to 18 inches possible in the most
persistent lake snows.
* WHERE...The Eastern Lake Ontario Region.
* WHEN...From Friday evening through Sunday morning.
* IMPACTS...Travel could be very difficult with snow covered roads
and poor visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Narrow bands of heavy snow could impact portions of the region.
Localized travel problems will be possible.
&&
$$
Hitchcock/JM715
WWUS41 KBUF 241443
WSWBUF
URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
943 AM EST Thu Dec 24 2020
NYZ010>012-242300-
/O.CON.KBUF.LE.W.0007.201225T1700Z-201227T0000Z/
/O.CON.KBUF.WW.Y.0027.201225T0000Z-201225T1700Z/
Northern Erie-Genesee-Wyoming-
Including the cities of Buffalo, Batavia, and Warsaw
943 AM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO NOON EST FRIDAY...
...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
7 PM EST SATURDAY...
* WHAT...For the Lake Effect Snow Warning, heavy lake effect
snow expected. Total snow accumulations of 9 to 18 inches in
the most persistent lake snows. Winds gusting as high as 35
mph will produce blowing and drifting snow. For the Winter
Weather Advisory, snow and mixed precipitation expected. Total
snow accumulations of 2 to 5 inches, greatest in western
portions of the area. Ice accumulations of up to one tenth of
an inch.
* WHERE...Northern Erie, Genesee, and Wyoming counties.
* WHEN...For the Lake Effect Snow Warning, from noon Friday to 7
PM EST Saturday. Heaviest lake effect snow expected Friday night
through Saturday morning. For the Winter Weather Advisory, from
7 PM this evening to noon EST Friday. Rain will transition to an
icy wintry mix this evening, then snow overnight.
* IMPACTS...Travel will be very difficult. Accumulating snow and
mixed precipitation tonight through early Friday will result
in very slippery roads. Heavy lake effect snow will then
result in deep snow cover on roads and poor visibility Friday
night through Saturday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4282 7820 4297 7819 4307 7831 4302 7877
4293 7897 4275 7897 4232 7975 4229 7972 4258 7898
4270 7838
TIME Y20M12D26T0000Z-Y20M12D26T1200Z
COORD...4290 7838 4307 7831 4310 7843 4304 7873
4297 7893 4281 7890 4258 7929 4266 7892 4272 7879
4281 7866
TIME Y20M12D26T1200Z-Y20M12D27T0000Z
$$
NYZ019-242300-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Chautauqua-
Including the city of Jamestown
943 AM EST Thu Dec 24 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 7 PM EST SATURDAY...
* WHAT...Heavy snow and mixed precipitation expected. Total snow
accumulations of 9 to 18 inches and ice accumulations of
around one tenth of an inch. Winds gusting as high as 40 mph
will produce blowing and drifting snow Friday night.
* WHERE...Chautauqua county.
* WHEN...From 7 PM this evening to 7 PM EST Saturday. Rain will
change to an icy wintry mix early this evening, then to snow
late this evening.
* IMPACTS...Travel will be very difficult. Accumulating snow and
mixed precipitation tonight through early Friday will result
in very slippery roads. Heavy lake effect snow will then
result in deep snow cover on roads and poor visibility Friday
and Friday evening.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow and ice will create dangerous travel
conditions.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ020-085-242300-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Cattaraugus-Southern Erie-
Including the cities of Olean, Orchard Park, and Springville
943 AM EST Thu Dec 24 2020
...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 7 PM EST SATURDAY...
* WHAT...Heavy snow and mixed precipitation expected. Total snow
accumulations of 9 to 18 inches and ice accumulations of
around one tenth of an inch. Winds gusting as high as 35 mph
will produce blowing and drifting snow.
* WHERE...Cattaraugus and Southern Erie counties.
* WHEN...From 7 PM this evening to 7 PM EST Saturday. Rain will
change to an icy wintry mix this evening, then to snow
overnight. Lake effect snow will develop Friday and continue
through Saturday.
* IMPACTS...Travel will be very difficult. Accumulating snow and
mixed precipitation tonight through early Friday will result
in very slippery roads. Heavy lake effect snow will then
result in deep snow cover on roads and poor visibility Friday
night through Saturday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow and ice will create dangerous travel
conditions.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ004-014-242300-
/O.EXB.KBUF.WW.Y.0027.201225T0500Z-201225T1700Z/
Wayne-Ontario-
Including the cities of Newark and Canandaigua
943 AM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
NOON EST FRIDAY...
* WHAT...Mixed precipitation expected. Total snow accumulations
of an inch or less and ice accumulations of a few hundredths
of an inch.
* WHERE...Wayne and Ontario counties.
* WHEN...From midnight tonight to noon EST Friday. Rain will
change to an icy wintry mix from west to east overnight.
* IMPACTS...Plan on very slippery road conditions due to the
combination of icy mixed precipitation and snow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of mainly sleet and freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ001-002-242300-
/O.CON.KBUF.WW.Y.0027.201225T0000Z-201225T1700Z/
Niagara-Orleans-
Including the cities of Niagara Falls and Medina
943 AM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO NOON EST FRIDAY...
* WHAT...Snow and mixed precipitation expected. Total snow
accumulations of 2 to 5 inches, greatest over Niagara County.
Ice accumulations of up to one tenth of an inch.
* WHERE...Niagara and Orleans counties.
* WHEN...From 7 PM this evening to noon EST Friday. Rain will
change to an icy wintry mix this evening, then to snow
overnight.
* IMPACTS...Plan on very slippery road conditions due to the
combination of mixed precipitation and snow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ003-013-021-242300-
/O.CON.KBUF.WW.Y.0027.201225T0400Z-201225T1700Z/
Monroe-Livingston-Allegany-
Including the cities of Rochester, Geneseo, and Wellsville
943 AM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS
EVENING TO NOON EST FRIDAY...
* WHAT...Mixed precipitation expected. Total snow accumulations
of an inch or less and ice accumulations of around one tenth
of an inch.
* WHERE...Monroe, Livingston, and Allegany counties.
* WHEN...From 11 PM this evening to noon EST Friday. Rain will
change to an icy wintry mix from west to east overnight.
* IMPACTS...Plan on very slippery road conditions.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of mainly sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ006>008-242300-
/O.CON.KBUF.WS.A.0011.201226T0000Z-201227T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
943 AM EST Thu Dec 24 2020
...WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY EVENING
THROUGH SUNDAY MORNING...
* WHAT...Heavy lake effect snow possible. Total snow
accumulations of 9 to 18 inches possible in the most
persistent lake snows.
* WHERE...The Eastern Lake Ontario Region.
* WHEN...From Friday evening through Sunday morning.
* IMPACTS...Travel could be very difficult with snow covered
roads and poor visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Narrow bands of heavy snow could impact portions of the region.
Localized travel problems will be possible.
&&
$$112
WWUS41 KBUF 242341
WSWBUF
URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
641 PM EST Thu Dec 24 2020
NYZ006>008-250745-
/O.UPG.KBUF.WS.A.0011.201226T0000Z-201227T1200Z/
/O.EXB.KBUF.LE.W.0007.201226T0000Z-201227T1500Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
641 PM EST Thu Dec 24 2020
...LAKE EFFECT SNOW WARNING IN EFFECT FROM 7 PM FRIDAY TO 10 AM
EST SUNDAY...
* WHAT...Heavy lake effect snow expected. Total snow
accumulations of 11 to 22 inches in the most persistent lake
snows.
* WHERE...The Eastern Lake Ontario Region.
* WHEN...From 7 PM Friday to 10 AM EST Sunday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the evening commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.
Submit snow reports through our website or social media.
&&
Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4424 7581 4423 7609 4408 7636 4386 7637
4379 7630 4381 7605 4385 7586 4395 7578
TIME Y20M12D26T0000Z-Y20M12D26T1200Z
COORD...4389 7558 4409 7584 4407 7609 4391 7637
4370 7623 4349 7614 4347 7573 4354 7559
TIME Y20M12D26T1200Z-Y20M12D27T0600Z
COORD...4379 7569 4389 7581 4389 7598 4378 7623
4357 7625 4344 7633 4347 7594 4356 7573
TIME Y20M12D27T0600Z-Y20M12D27T1500Z
$$
NYZ010>012-250745-
/O.CON.KBUF.LE.W.0007.201225T1700Z-201227T0000Z/
/O.CON.KBUF.WW.Y.0027.201225T0000Z-201225T1700Z/
Northern Erie-Genesee-Wyoming-
Including the cities of Buffalo, Batavia, and Warsaw
641 PM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON EST
FRIDAY...
...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM NOON FRIDAY TO
7 PM EST SATURDAY...
* WHAT...For the Lake Effect Snow Warning, heavy lake effect snow
expected. Total snow accumulations of 10 to 19 inches in the
most persistent lake snows. For the Winter Weather Advisory, a
brief period of mixed precipitation expected this evening then
snow expected. Total snow accumulations of 3 to 6 inches and ice
accumulations a tenth of an inch or less.
* WHERE...Northern Erie, Genesee, and Wyoming counties.
* WHEN...For the Lake Effect Snow Warning, from noon Friday to 7
PM EST Saturday. For the Winter Weather Advisory, until noon
EST Friday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.
Submit snow reports through our website or social media.
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4282 7820 4297 7819 4308 7848 4297 7890
4279 7890 4232 7975 4239 7931 4250 7912 4269 7853
4270 7838
TIME Y20M12D26T0000Z-Y20M12D26T1200Z
COORD...4290 7838 4307 7831 4310 7843 4304 7873
4297 7893 4281 7890 4258 7929 4266 7892 4272 7879
4281 7866
TIME Y20M12D26T1200Z-Y20M12D27T0000Z
$$
NYZ019-250745-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Chautauqua-
Including the city of Jamestown
641 PM EST Thu Dec 24 2020
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM EST
SATURDAY...
* WHAT...A brief period of mixed precipitation early this evening
then heavy snow expected. Total snow accumulations of 11 to 22
inches and ice accumulations less than a tenth of an inch.
Winds gusting as high as 35 mph.
* WHERE...Chautauqua county.
* WHEN...Until 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow and ice will create dangerous travel
conditions.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ020-085-250745-
/O.CON.KBUF.WS.W.0006.201225T0000Z-201227T0000Z/
Cattaraugus-Southern Erie-
Including the cities of Olean, Orchard Park, and Springville
641 PM EST Thu Dec 24 2020
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM EST
SATURDAY...
* WHAT...A brief period of mixed precipitation this evening then
heavy snow expected. Total snow accumulations of 18 to 24 inches
and ice accumulations of less than a tenth of an inch. Winds
gusting as high as 35 mph.
* WHERE...Cattaraugus and Southern Erie counties.
* WHEN...Until 7 PM EST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Widespread accumulating snow and ice will create dangerous travel
conditions.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ001-002-250745-
/O.CON.KBUF.WW.Y.0027.201225T0000Z-201225T1700Z/
Niagara-Orleans-
Including the cities of Niagara Falls and Medina
641 PM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON EST
FRIDAY...
* WHAT...A period of mixed precipitation early tonight, then snow
expected. Total snow accumulations of 3 to 5 inches, greatest
over Niagara County and ice accumulations a tenth of an inch or
less.
* WHERE...Niagara and Orleans counties.
* WHEN...Until noon EST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning or evening commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ003-013-021-250745-
/O.CON.KBUF.WW.Y.0027.201225T0400Z-201225T1700Z/
Monroe-Livingston-Allegany-
Including the cities of Rochester, Geneseo, and Wellsville
641 PM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS
EVENING TO NOON EST FRIDAY...
* WHAT...Snow and mixed precipitation expected. Total snow
accumulations of 2 to 4 inches and ice accumulations of around
one tenth of an inch.
* WHERE...Monroe, Livingston, and Allegany counties.
* WHEN...From 11 PM this evening to noon EST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
NYZ004-014-250745-
/O.CON.KBUF.WW.Y.0027.201225T0500Z-201225T1700Z/
Wayne-Ontario-
Including the cities of Newark and Canandaigua
641 PM EST Thu Dec 24 2020
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO NOON EST FRIDAY...
* WHAT...Snow and mixed precipitation expected. Total snow
accumulations of up to 2 inches and ice accumulations of a few
hundredths of an inch.
* WHERE...Wayne and Ontario counties.
* WHEN...From midnight tonight to noon EST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Periods of snow, sleet or freezing rain will result in slippery
roads and limited visibilities. Slow down and use caution while
driving.
Submit snow and ice reports through our website or social media.
&&
$$
TMAWhat forecasters said that day
The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Buffalo, NY wrote its last area forecast discussion before this winter storm watch went out at Dec 21, 2:09 PM EST, 9 minutes earlier.
Area forecast discussion, Dec 21, 2:09 PM EST, 9 minutes before
Area Forecast Discussion
National Weather Service Buffalo NY
209 PM EST Mon Dec 21 2020
.SYNOPSIS...
A weak storm system will bring an inch or two of snow to southwest
New York State tonight, leaving some lake enhanced rain and snow in
its wake for Tuesday. A significant storm system will begin to
impact the region Christmas Eve. This system will bring a period of
soaking rain and warm temperatures Christmas Eve, followed by colder
air and the potential for heavy lake effect snow on Christmas Day
and into the holiday weekend.
&&
.NEAR TERM /THROUGH TUESDAY NIGHT/...
Current satellite imagery is depicting mostly cloudy skies across
New York state this afternoon, while surface observations are
reporting light southerly flow and temperatures in the mid to upper
30s. With the southerly flow, some low lake enhanced clouds
northeast of both lakes this afternoon as being shown by current
radar imagery.
A shortwave trough over the Western Great Lakes today will continue
to dive southeast into the central Great Lakes tonight. Meanwhile
its associated surface low will follow suit, which will allow for
some showers to develop late this afternoon over southwestern New
York. The greatest amount of precipitation should stay south of the
area as the base of the trough will track southeast across the Ohio
Valley into the Delmarva Peninsula this afternoon through Tuesday.
As the trough axis crosses overhead tonight, showers will continue
to expand across the forecast area this evening through tonight.
Along with the trough axis pattern a switch from southwesterly flow
to west/northwesterly flow will allow for some lake enhancement and
upsloping across the higher terrain in the western portions of the
Southern Tier tonight. The higher terrain should stay mostly snow,
with a mix of rain and snow in the lower elevations and areas in
close proximity of the lake shore will be rain initially then change
over to a mix of rain and snow. Snow accumulations across the region
will be greatest for the Western Southern Tier where up to 3 inches
is possible through Tuesday morning. For the higher terrain across
the areas east of Lake Ontario, around an inch is expected. Lower
elevations can expect around a half an inch of snow through Tuesday
morning.
For most areas on Tuesday, rain and snow showers will taper off as
the trough shifts east, however lake effect snows downwind of both
lakes will continue due to a southerly passage of a cold front
causing temperatures at 850mb to cool a tad. The best chances for
the lake enhanced snows will be southeast of both lakes, where an
upstream connection from Lake Huron and or the Georgian Bay can set
up. Areas across the higher terrain should stay all snow, while the
lower elevations will be a mix of rain and snow. Snowfall amounts of
a half inch can be expected across the higher terrain with lower
amounts elsewhere. As the trough shifts east and ridging over the
region increases, along with weak warm air advection, the lake
response off of both lakes will start to weaken during the afternoon
hours.
High pressure at the surface and aloft will move into the region
Tuesday night, shutting down any lingering lake effect snow showers.
Temperatures tonight will be in the low 30s for the area. Tuesday
highs will be in the mid to upper 30s. With the subtle cold air
advection on Tuesday, lows for Tuesday night will drop into the mid
to upper 20s for a vast majority of the area while some low 20s and
upper teens are expected for the area east of Lake Ontario.
&&
.SHORT TERM /WEDNESDAY THROUGH WEDNESDAY NIGHT/...
Strong warm advection will ensue across our region Wednesday
ahead of powerful storm system located over the upper Great
Lakes. Any warm frontal mixed precip near and north of Lake
Ontario Wednesday morning will give way to breezy and mild
conditions. Temps in the far west should climb into at least the
mid 40s, with slightly cooler temps hanging on east of Lake
Ontario. Normal highs at this time run in the low to mid 30s.
Guidance is starting to catch on to this warmer solution, so
remain a bit above guidance at this time for high temps. If
better clearing starts to look more favorable, would likely need
to raise temps more with later packages. Pocket of +7/+8C 850Ts
still on track to be overhead across western NY by Wednesday
afternoon, with it remaining a couple degrees cooler aloft east
of Lake Ontario. No wx related travel issues still on track for
Wednesday.
Model consensus concerning approaching winter storm has sped up just
a bit overall, with the 21/00Z GFS still appearing too fast, with
the 21/00Z ECMWF and Canadian now in fairly good agreement with the
evolution of the system. Will bring in the chance for a few showers
later Wednesday night, mainly across western NY. Any precip will be
in the liquid form across the area with warm airmass in place.
&&
.LONG TERM /THURSDAY THROUGH MONDAY/...
Much talked about winter storm still on track to impact the region
during this period. Warm, wet and breezy conditions on Thursday will
be give way to rain changing over to an accumulating snow Thursday
night as much colder air rushes in. This will be followed by the
potential for a significant lake effect snow event for Christmas Day
through Saturday, particularly east of the Lakes.
Forecast remains largely based off of the ECMWF and Canadian as the
21/00Z runs have come into fairly good agreement with the handling
of the system, with the GFS still the outlier being too fast.
Very complex storm system will evolve during this period, as split
flow phases over the Great Lakes and Ohio Valley. Still appears a
good slug of rain on tap for Thursday into the first part of
Thursday night along and ahead of a strong cold front that will plow
across the region later Thursday and Thursday night. Can't rule out
some minor flooding, however potential does not look high at this
time, as the the heaviest rain will likely remain to our south
and/or east. Strong southerly flow will persist with temps remaining
well above normal.
In the wake of the frontal passage Thursday night, rain will quickly
changeover to snow. Timing still uncertain with changeover, but
there could be several inches of wet snow over the western counties
by daybreak, with the eastern half of the forecast area possibly
following suit Christmas morning.
Coldest airmass of season pours across the region on Christmas Day
with synoptic snow giving way to moderate to heavy lake snow east of
both Lakes. Travel likely to become an issue, mainly from southern
suburbs of Buffalo to PA line and east of Lake Ontario.
Heavy lake snows Christmas night east of both lakes. Cap 8-12k ft so
rates >2" likely with DGZ fully in play. Thunder/lightning
will also be possible (esp east of Lk Ont).
Impressive lake snows will persist through Saturday, possibly
lingering into Sunday morning, while remainder of the region will
experience occasional snow showers under cyclonic flow aloft and mid
winter temps well below freezing.
&&
.AVIATION /19Z MONDAY THROUGH SATURDAY/...
Current conditions are composed of mostly MVFR CIGS with the
exception of KJHWN where CIGS are IFR. The region will remain mainly
dry through the afternoon as a surface ridge builds into the
southern portions of the region today. Moisture trapped beneath an
increasing subsidence inversion will lend itself to the continuation
of MVFR ceiling heights through this afternoon. A few TAF locations
right near the lakes may drop down to IFR at times with winds off
the lakes and low level moisture already in place.
Tonight, MVFR/IFR cigs and vsbys with rain and snow showers for most
of the TAF sites, but especially for KJHW as a shortwave trough
crosses south of the area.
Outlook... Tuesday...MVFR/IFR. Rain and snow showers likely.
Wednesday...VFR.
Thursday...MVFR in rain. LLWS likely.
Friday and Saturday...MVFR and some IFR possible in lake effect
snows.
&&
.MARINE...
Southerly winds through the rest of this afternoon and tonight
should maintain a light to gentle breeze.
Increasing west to northwest winds will cause wave heights to
increase late tonight and early Tuesday morning. Due to freshening
winds, Small Craft Advisories are in effect for both Lake Erie and
Lake Ontario.
&&
.BUF WATCHES/WARNINGS/ADVISORIES...
NY...None.
MARINE...Small Craft Advisory from 7 AM Tuesday to 1 AM EST Wednesday
for LEZ040-041.
Small Craft Advisory from 7 AM Tuesday to 1 AM EST
Wednesday for LOZ042>044.
Small Craft Advisory from 1 PM Tuesday to 1 AM EST
Wednesday for LOZ045.
&&
SYNOPSIS...PP/Thomas
NEAR TERM...EAJ
SHORT TERM...JM
LONG TERM...JM/RSH
AVIATION...EAJ/PP
MARINE...EAJ/PPHazardous weather outlook, Dec 21, 2:17 PM EST, 1 minute before
Hazardous Weather Outlook National Weather Service Buffalo NY 217 PM EST Mon Dec 21 2020 NYZ010>012-019-020-085-221930- Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus-Southern Erie- 217 PM EST Mon Dec 21 2020 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH SATURDAY AFTERNOON... This Hazardous Weather Outlook is for portions of western New York. .DAY ONE...This afternoon and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Winter Storm Watch. A strengthening storm over our region on Thursday could generate a soaking rain into Thursday evening. This rain combined with snow melt could result in minor flooding. Following a general accumulating snow Thursday night, significant lake effect snow will then be possible east or northeast of Lake Erie from Christmas Day through Saturday. While there is still some uncertainty in the track of the storm system, there is growing confidence that travel in at least parts of the region could be severely impacted by what could turn out to be a significant lake effect snow event. Any lake effect snow would be accompanied by gusty winds as well. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ001>005-013-014-021-221930- Niagara-Orleans-Monroe-Wayne-Northern Cayuga-Livingston-Ontario- Allegany- 217 PM EST Mon Dec 21 2020 This Hazardous Weather Outlook is for portions of western and north central New York. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ006>008-221930- Oswego-Jefferson-Lewis- 217 PM EST Mon Dec 21 2020 ...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY AFTERNOON... This Hazardous Weather Outlook is for portions of central New York. .DAY ONE...This afternoon and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Winter Storm Watch. A strengthening storm over our region on Thursday could generate a soaking rain into Thursday night. This rain combined with snow melt could result in minor flooding. Following a general accumulating snow later Thursday night into Christmas morning, significant lake effect snow will then be possible east or northeast of Lake Ontario from Christmas Day through Saturday. While there is still some uncertainty in the track of the storm system, there is growing confidence that travel in at least parts of the region could be severely impacted by what could turn out to be a significant lake effect snow event. Any lake effect snow would be accompanied by gusty winds as well. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf LEZ020-040-041-LOZ030-042>045-062>065-SLZ022-024-221930- Upper Niagara River and Buffalo Harbor- Lake Erie nearshore waters from Ripley to Dunkirk- Lake Erie nearshore waters from Dunkirk to Buffalo- Lower Niagara River- Lake Ontario nearshore waters from the Niagara River to Hamlin Beach- Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay- Lake Ontario nearshore waters from Sodus Bay to Mexico Bay- Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence River- Lake Ontario open waters from the Niagara River to Hamlin Beach- Lake Ontario open waters from Hamlin Beach to Sodus Bay- Lake Ontario open waters from Sodus Bay to Mexico Bay- Lake Ontario open waters from Mexico Bay to the Saint Lawrence River- Saint Lawrence River from Cape Vincent to Ogdensburg- Saint Lawrence River from Ogdensburg to Saint Regis- 217 PM EST Mon Dec 21 2020 This Hazardous Weather Outlook is for the New York waters of Lake Erie, Lake Ontario, and the Saint Lawrence River. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 9:39 PM EST | Small Craft Advisory | BUF | 9 hr | |
| Dec 21, 12:55 PM EST | Small Craft Advisory | BUF | 39 hr |
Nearby
Winter Storm Watches in New York, 2020Every winter storm watch in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.