Alert archive / New York / Lake Effect Snow Warnings in 2017

Lake Effect Snow Warning 9, NWS Buffalo, NY

December 9, 20178 counties in New York

NWS Buffalo, NY issued this lake effect snow warning at Dec 9, 2017, 1:59 PM EST for 8 counties in New York. It took effect at Dec 10, 2017, 1:00 AM EST. It was in force for 27 hr. 27 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 9, 2017, 1:59 PM EST (18:59 UTC)
In effect from
Dec 10, 2017, 1:00 AM EST
Expired
Dec 11, 2017, 3:48 AM EST
In force
27 hr
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 18:57 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.

What was reported inside it

TimeReportWhereRemark
Dec 10, 6:00 AM ESTSNOW 3.65 Ese Oswego, NY24-HOUR SNOWFALL.
Dec 10, 7:00 AM ESTSNOW 3.6Wales, NY24-HOUR SNOWFALL.
Dec 10, 1:30 PM ESTSNOW 4.5Hamburg, NY4.5 INCHES FROM 12:00-1:30 PM.
Dec 10, 3:30 PM ESTSNOW 8Alden, NY
Dec 10, 4:15 PM ESTSNOW 7.8Hamburg, NY
Dec 10, 4:29 PM ESTSNOW 121 Ssw Spring Brook, NY
Dec 10, 5:10 PM ESTSNOW 8.4Ene East Aurora, NY
Dec 10, 5:21 PM ESTSNOW 72 Ssw Blasdell, NY
Dec 10, 5:29 PM ESTSNOW 3.8Oswego East, NY
Dec 10, 6:40 PM ESTSNOW 82 Ssw Blasdell, NY
Dec 10, 6:45 PM ESTSNOW 9.5West Seneca, NY
Dec 10, 6:53 PM ESTSNOW 131 Ssw Spring Brook, NY
Dec 10, 7:19 PM ESTSNOW 5.72 Ne Stafford, NY
Dec 10, 7:29 PM ESTSNOW 17Carnegie, NY
Dec 10, 7:45 PM ESTSNOW 6Carthage, NY
Dec 10, 8:00 PM ESTSNOW 6Corfu, NY
Dec 10, 8:00 PM ESTSNOW 10.1Ene East Aurora, NY
Dec 10, 8:00 PM ESTSNOW 151 Ssw Spring Brook, NY
Dec 10, 8:45 PM ESTSNOW 183 Se Copenhagen, NY
Dec 10, 9:25 PM ESTSNOW 17.51 Sse Elma, NY
Dec 10, 9:30 PM ESTSNOW 6.22 Wsw Winchester, NY
Dec 10, 9:30 PM ESTSNOW 16.71 N Orchard Park, NY
Dec 10, 9:50 PM ESTSNOW 112 Ssw Blasdell, NY
Dec 10, 10:00 PM ESTSNOW 16.23 Wsw Elma, NY
Dec 10, 10:11 PM ESTSNOW 7.8Lancaster, NY
Dec 10, 11:24 PM ESTSNOW 8.72 Wsw Winchester, NY
Dec 10, 11:40 PM ESTSNOW 5.5Honeyville, NY

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.0 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.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2017-12-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2017-12-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939587897117136156175194214Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
907 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

411 
WWUS41 KBUF 091859
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
159 PM EST Sat Dec 9 2017

NYZ006>008-100300-
/O.UPG.KBUF.WS.A.0006.171210T1200Z-171211T1100Z/
/O.NEW.KBUF.LE.W.0009.171210T0900Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
159 PM EST Sat Dec 9 2017

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 4 AM SUNDAY TO 7 AM
EST MONDAY...

* WHAT...Heavy lake effect snow expected. Travel will be very
  difficult at times. Total snow accumulations of 6 to 12 inches
  are expected in the most persistent lake snows, and up to 15
  inches across the Tug Hill Plateau.

* WHERE...The Eastern Lake Ontario Region. Greatest snow amounts
  across southern Jefferson, northern Oswego, and western Lewis
  counties.

* WHEN...4 AM Sunday to 7 AM Monday. Heaviest snow expected Sunday
  night.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads at
  times, leading to difficult travel conditions.

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...4361 7543 4387 7559 4391 7579 4376 7623 
        4359 7625 4356 7643 4351 7650 4339 7645 4331 7588 
        4348 7581 4342 7550 4352 7533 
TIME Y17M12D10T0900Z-Y17M12D10T2100Z
COORD...4408 7515 4414 7529 4408 7573 4409 7606 
        4397 7631 4384 7634 4383 7629 4365 7623 4362 7612 
        4361 7561 4367 7554 4373 7513 
TIME Y17M12D10T2100Z-Y17M12D11T0300Z
COORD...4380 7515 4398 7514 4395 7536 4387 7562 
        4389 7561 4384 7614 4379 7627 4359 7622 4355 7565 
        4358 7553 4364 7548 4367 7512 
TIME Y17M12D11T0300Z-Y17M12D11T0600Z
COORD...4353 7529 4355 7547 4366 7569 4367 7620 
        4355 7625 4356 7643 4341 7664 4332 7642 4328 7600 
        4331 7588 4348 7581 4348 7542 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ012-019-020-085-100300-
/O.UPG.KBUF.WS.A.0006.171210T1200Z-171211T1100Z/
/O.NEW.KBUF.LE.W.0009.171210T0600Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
159 PM EST Sat Dec 9 2017

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 1 AM SUNDAY TO 7 AM
EST MONDAY...

* WHAT...Heavy lake effect snow expected. Travel will be very
  difficult at times. Total snow accumulations of 7 to 13 inches 
  are expected in the most persistent lake snows.

* WHERE...Southern Erie, western Wyoming, northern and western
  Chautauqua, and northwest Cattaraugus counties.

* WHEN...1 AM Sunday to 7 AM Monday. Heaviest snow expected later
  Sunday afternoon and Sunday night.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads at
  times, leading to difficult travel conditions.

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...4258 7825 4275 7819 4277 7864 4267 7904 
        4257 7914 4238 7950 4230 7975 4199 7977 4208 7952 
        4215 7936 4225 7898 4239 7861 
TIME Y17M12D10T0600Z-Y17M12D10T1200Z
COORD...4227 7898 4228 7904 4240 7914 4241 7929 
        4233 7942 4232 7954 4225 7976 4199 7977 4201 7923 
        4199 7897 4199 7873 4203 7873 
TIME Y17M12D10T1200Z-Y17M12D10T1800Z
COORD...4260 7822 4274 7805 4282 7803 4284 7820 
        4277 7864 4278 7881 4274 7903 4232 7975 4223 7976 
        4224 7961 4244 7887 4250 7853 
TIME Y17M12D10T1800Z-Y17M12D11T0300Z
COORD...4239 7852 4258 7822 4273 7826 4268 7889 
        4261 7902 4249 7945 4232 7975 4199 7977 4202 7929 
        4201 7917 4210 7904 4232 7853 
TIME Y17M12D11T0300Z-Y17M12D11T1200Z

$$

HITCHCOCK
8 follow-up statements
987 
WWUS41 KBUF 100231
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
931 PM EST Sat Dec 9 2017

NYZ012-019-020-085-101045-
/O.CON.KBUF.LE.W.0009.171210T0600Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
931 PM EST Sat Dec 9 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM 1 AM SUNDAY TO
7 AM EST MONDAY...

* WHAT...Heavy lake effect snow expected. Travel will be very 
  difficult at times. Total snow accumulations of 7 to 13 inches 
  are expected in the most persistent lake snows.

* WHERE...Southern Erie, western Wyoming, northern and western 
  Chautauqua, and northwest Cattaraugus counties.

* WHEN...1 AM Sunday to 7 AM Monday. Heaviest snow expected 
  later Sunday afternoon and Sunday night.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to difficult travel conditions.

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...4258 7825 4275 7819 4277 7864 4267 7904 
        4257 7914 4238 7950 4230 7975 4199 7977 4208 7952 
        4215 7936 4225 7898 4239 7861 
TIME Y17M12D10T0600Z-Y17M12D10T1200Z
COORD...4227 7898 4228 7904 4240 7914 4241 7929 
        4233 7942 4232 7954 4225 7976 4199 7977 4201 7923 
        4199 7897 4199 7873 4203 7873 
TIME Y17M12D10T1200Z-Y17M12D10T1800Z
COORD...4260 7822 4274 7805 4282 7803 4284 7820 
        4277 7864 4278 7881 4274 7903 4232 7975 4223 7976 
        4224 7961 4244 7887 4250 7853 
TIME Y17M12D10T1800Z-Y17M12D11T0300Z
COORD...4239 7852 4258 7822 4273 7826 4268 7889 
        4261 7902 4249 7945 4232 7975 4199 7977 4202 7929 
        4201 7917 4210 7904 4232 7853 
TIME Y17M12D11T0300Z-Y17M12D11T1200Z

$$

NYZ006>008-101045-
/O.CON.KBUF.LE.W.0009.171210T0900Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
931 PM EST Sat Dec 9 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM 4 AM SUNDAY TO
7 AM EST MONDAY...

* WHAT...Heavy lake effect snow expected. Travel will be very 
  difficult at times. Total snow accumulations of 6 to 12 inches 
  are expected in the most persistent lake snows, and up to 15 
  inches across the Tug Hill Plateau.

* WHERE...The Eastern Lake Ontario Region. Greatest snow amounts 
  across southern Jefferson, northern Oswego, and western Lewis 
  counties.

* WHEN...4 AM Sunday to 7 AM Monday. Heaviest snow expected 
  Sunday night.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to difficult travel conditions.

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...4361 7543 4387 7559 4391 7579 4376 7623 
        4359 7625 4356 7643 4351 7650 4339 7645 4331 7588 
        4348 7581 4342 7550 4352 7533 
TIME Y17M12D10T0900Z-Y17M12D10T2100Z
COORD...4408 7515 4414 7529 4408 7573 4409 7606 
        4397 7631 4384 7634 4383 7629 4365 7623 4362 7612 
        4361 7561 4367 7554 4373 7513 
TIME Y17M12D10T2100Z-Y17M12D11T0300Z
COORD...4380 7515 4398 7514 4395 7536 4387 7562 
        4389 7561 4384 7614 4379 7627 4359 7622 4355 7565 
        4358 7553 4364 7548 4367 7512 
TIME Y17M12D11T0300Z-Y17M12D11T0600Z
COORD...4353 7529 4355 7547 4366 7569 4367 7620 
        4355 7625 4356 7643 4341 7664 4332 7642 4328 7600 
        4331 7588 4348 7581 4348 7542 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$
229 
WWUS41 KBUF 100909
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
409 AM EST Sun Dec 10 2017

NYZ012-019-020-085-101700-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
409 AM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow. Plan on difficult travel 
  conditions. Additional snow accumulations of 5 to 9 inches are 
  expected in the most persistent lake snows.

* WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie 
  counties.

* WHEN...Until 7 AM EST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in 
  visibility at times.

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...4250 7834 4262 7842 4268 7865 4266 7889 
        4252 7927 4227 7975 4199 7977 4199 7897 4207 7869 
        4229 7839 
TIME Y17M12D10T0600Z-Y17M12D10T1200Z
COORD...4255 7820 4269 7826 4271 7847 4267 7898 
        4258 7926 4227 7975 4199 7977 4199 7873 4201 7844 
        4215 7829 
TIME Y17M12D10T1200Z-Y17M12D10T1800Z
COORD...4276 7801 4286 7798 4288 7820 4278 7848 
        4279 7866 4276 7900 4232 7975 4223 7976 4248 7880 
        4252 7850 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z
COORD...4236 7870 4249 7847 4254 7831 4265 7827 
        4263 7875 4246 7931 4225 7976 4199 7977 4204 7929 
        4226 7881 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ006>008-101700-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
409 AM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow. Travel will be very difficult at
  times. Additional snow accumulations of 7 to 13 inches are 
  expected in the most persistent lake snows.

* WHERE...The Eastern Lake Ontario Region.

* WHEN...Until 7 AM EST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in 
  visibility at times.

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...4355 7523 4366 7527 4387 7583 4376 7623 
        4357 7625 4345 7663 4326 7645 4320 7587 4348 7581 
        4342 7550 
TIME Y17M12D10T0600Z-Y17M12D10T1200Z
COORD...4363 7518 4367 7554 4364 7612 4355 7625 
        4345 7663 4329 7651 4328 7620 4318 7587 4342 7586 
        4345 7548 
TIME Y17M12D10T1200Z-Y17M12D10T1800Z
COORD...4384 7526 4398 7523 4411 7539 4410 7572 
        4397 7634 4365 7623 4359 7625 4350 7620 4352 7581 
        4363 7542 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z
COORD...4363 7518 4390 7522 4393 7573 4374 7625 
        4359 7625 4345 7663 4321 7620 4329 7584 4348 7581 
        4342 7550 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ010-011-101700-
/O.NEW.KBUF.WW.Y.0022.171210T1800Z-171211T0600Z/
Northern Erie-Genesee-
Including the cities of Buffalo and Batavia
409 AM EST Sun Dec 10 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO
1 AM EST MONDAY...

* WHAT...Lake effect snow expected. Plan on hazardous travel 
  conditions. Total snow accumulations of 4 to 7 inches are 
  expected in the most persistent lake snows.

* WHERE...Northern Erie and Genesee counties.

* WHEN...From 1 PM this afternoon to 1 AM EST Monday.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at 
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect 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.

&&

$$

JJR
734 
WWUS41 KBUF 101556
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
1056 AM EST Sun Dec 10 2017

NYZ010-011-110000-
/O.UPG.KBUF.WW.Y.0022.171210T1800Z-171211T0600Z/
/O.EXB.KBUF.LE.W.0009.171210T1700Z-171211T0600Z/
Northern Erie-Genesee-
Including the cities of Buffalo and Batavia
1056 AM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING IN EFFECT UNTIL 1 AM EST MONDAY...

* WHAT...Heavy lake effect snow expected. Plan on very difficult 
  travel conditions. Total snow accumulations of 6 to 12 inches 
  are expected in the most persistent lake snows.

* WHERE...Northern Erie and Genesee counties. Greatest snow
  amounts across the Buffalo Southtowns into South Buffalo, and
  extending into southwestern Genesee County.

* WHEN...Noon today to 1 AM Monday. Heaviest snow expected from
  mid afternoon through early evening.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4278 7804 4293 7801 4303 7815 4303 7841 
        4294 7888 4281 7890 4232 7975 4223 7976 4227 7943 
        4244 7863 4261 7831 4265 7830 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z

$$

NYZ012-019-020-085-110000-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
1056 AM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very
  difficult at times. Additional snow accumulations of 6 to 12 
  inches are expected in the most persistent lake snows.

* WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie
  counties. Greatest snow amounts expected across Southern Erie,
  western Wyoming, northern and western Chautauqua, and northwest
  Cattaraugus counties.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4261 7831 4273 7845 4272 7881 4272 7906 
        4234 7970 4229 7963 4222 7958 4222 7938 4229 7889 
        4234 7873 4243 7856 4248 7836 
TIME Y17M12D10T1500Z-Y17M12D10T1800Z
COORD...4278 7804 4293 7801 4303 7815 4303 7841 
        4294 7888 4281 7890 4232 7975 4223 7976 4227 7943 
        4244 7863 4261 7831 4265 7830 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z
COORD...4234 7853 4256 7852 4256 7900 4251 7920 
        4233 7963 4225 7976 4206 7976 4204 7961 4207 7940 
        4215 7903 4217 7881 4225 7866 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ006>008-110000-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
1056 AM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very
  difficult at times. Additional snow accumulations of 8 to 16 
  inches are expected in the most persistent lake snows.

* WHERE...The Eastern Lake Ontario Region. Greatest snow amounts
  expected across southern and central Jefferson, western and
  northern Lewis, and northern Oswego counties.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4377 7522 4380 7551 4390 7567 4390 7612 
        4381 7629 4367 7623 4353 7631 4349 7611 4348 7581 
        4342 7550 4359 7537 4362 7512 
TIME Y17M12D10T1500Z-Y17M12D10T2100Z
COORD...4408 7515 4420 7540 4416 7565 4407 7606 
        4395 7636 4386 7637 4383 7629 4370 7625 4367 7578 
        4372 7562 4384 7547 4391 7516 
TIME Y17M12D10T2100Z-Y17M12D11T0600Z
COORD...4376 7519 4396 7518 4392 7543 4388 7550 
        4388 7570 4385 7586 4369 7617 4363 7618 4354 7595 
        4355 7565 4368 7545 4369 7531 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

HITCHCOCK
248 
WWUS41 KBUF 101928
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
228 PM EST Sun Dec 10 2017

NYZ010-011-110330-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T0600Z/
Northern Erie-Genesee-
Including the cities of Buffalo and Batavia
228 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 1 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very
  difficult to impossible at times. Additional snow accumulations
  of 7 to 14 inches are expected in the most persistent lake
  snows, with storm totals of 14 to 20 inches in the most
  persistent lake snows.

* WHERE...Northern Erie and Genesee counties. Greatest snow
  amounts across the Buffalo Southtowns and southwest Genesee
  County.

* WHEN...Until 1 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4278 7804 4293 7801 4303 7815 4303 7841 
        4294 7888 4281 7890 4232 7975 4223 7976 4227 7943 
        4244 7863 4261 7831 4265 7830 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z

$$

NYZ012-019-020-085-110330-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
228 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very
  difficult to impossible at times. Additional snow accumulations
  of 7 to 14 inches are expected in the most persistent lake 
  snows, with storm totals of 14 to 20 inches in the most 
  persistent lake snows.

* WHERE...Western Wyoming, northern and western Chautauqua, 
  northwest Cattaraugus, and Southern Erie counties.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4261 7831 4273 7845 4272 7881 4272 7906 
        4234 7970 4229 7963 4222 7958 4222 7938 4229 7889 
        4234 7873 4243 7856 4248 7836 
TIME Y17M12D10T1500Z-Y17M12D10T1800Z
COORD...4278 7804 4293 7801 4303 7815 4303 7841 
        4294 7888 4281 7890 4232 7975 4223 7976 4227 7943 
        4244 7863 4261 7831 4265 7830 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z
COORD...4234 7853 4256 7852 4256 7900 4251 7920 
        4233 7963 4225 7976 4206 7976 4204 7961 4207 7940 
        4215 7903 4217 7881 4225 7866 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ006>008-110330-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
228 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very
  difficult at times. Additional snow accumulations of 7 to 14 
  inches are expected in the most persistent lake snows.

* WHERE...The Eastern Lake Ontario Region. Greatest snow amounts
  across southern and central Jefferson County, northern Oswego
  County, northern and western Lewis County.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4377 7522 4380 7551 4390 7567 4390 7612 
        4381 7629 4367 7623 4353 7631 4349 7611 4348 7581 
        4342 7550 4359 7537 4362 7512 
TIME Y17M12D10T1500Z-Y17M12D10T2100Z
COORD...4408 7515 4420 7540 4416 7565 4407 7606 
        4395 7636 4386 7637 4383 7629 4370 7625 4367 7578 
        4372 7562 4384 7547 4391 7516 
TIME Y17M12D10T2100Z-Y17M12D11T0600Z
COORD...4376 7519 4396 7518 4392 7543 4388 7550 
        4388 7570 4385 7586 4369 7617 4363 7618 4354 7595 
        4355 7565 4368 7545 4369 7531 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

HITCHCOCK
086 
WWUS41 KBUF 102045
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
345 PM EST Sun Dec 10 2017

NYZ010-011-110445-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T0600Z/
Northern Erie-Genesee-
Including the cities of Buffalo and Batavia
345 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 1 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Plan on difficult
  travel conditions. Additional snow accumulations of 6 to 11
  inches are expected in the most persistent lake snows, with
  storm totals of 14 to 20 inches in the most persistent lake
  snows.

* WHERE...Northern Erie and Genesee counties. Greatest snow
  amounts across the Buffalo Southtowns and southwest Genesee
  County.

* WHEN...Until 1 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4278 7804 4293 7801 4303 7815 4303 7841 
        4294 7888 4281 7890 4232 7975 4223 7976 4227 7943 
        4244 7863 4261 7831 4265 7830 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z

$$

NYZ012-019-020-085-110445-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
345 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very
  difficult to impossible at times. Additional snow accumulations
  of 6 to 12 inches are expected in the most persistent lake 
  snows, with storm totals of 14 to 20 inches in the most 
  persistent lake snows.

* WHERE...Western Wyoming, northern and western Chautauqua, 
  northwest Cattaraugus, and Southern Erie counties.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4261 7831 4273 7845 4272 7881 4272 7906 
        4234 7970 4229 7963 4222 7958 4222 7938 4229 7889 
        4234 7873 4243 7856 4248 7836 
TIME Y17M12D10T1500Z-Y17M12D10T1800Z
COORD...4278 7804 4293 7801 4303 7815 4303 7841 
        4294 7888 4281 7890 4232 7975 4223 7976 4227 7943 
        4244 7863 4261 7831 4265 7830 
TIME Y17M12D10T1800Z-Y17M12D11T0600Z
COORD...4234 7853 4256 7852 4256 7900 4251 7920 
        4233 7963 4225 7976 4206 7976 4204 7961 4207 7940 
        4215 7903 4217 7881 4225 7866 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ006>008-110445-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
345 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very
  difficult to impossible at times. Additional snow accumulations
  of 7 to 14 inches are expected in the most persistent lake 
  snows.

* WHERE...The Eastern Lake Ontario Region. Greatest snow amounts
  across southern and central Jefferson County, northern Oswego
  County, northern and western Lewis County.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4377 7522 4380 7551 4390 7567 4390 7612 
        4381 7629 4367 7623 4353 7631 4349 7611 4348 7581 
        4342 7550 4359 7537 4362 7512 
TIME Y17M12D10T1500Z-Y17M12D10T2100Z
COORD...4408 7515 4420 7540 4416 7565 4407 7606 
        4395 7636 4386 7637 4383 7629 4370 7625 4367 7578 
        4372 7562 4384 7547 4391 7516 
TIME Y17M12D10T2100Z-Y17M12D11T0600Z
COORD...4376 7519 4396 7518 4392 7543 4388 7550 
        4388 7570 4385 7586 4369 7617 4363 7618 4354 7595 
        4355 7565 4368 7545 4369 7531 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ003-013-110445-
/O.NEW.KBUF.WW.Y.0023.171210T2045Z-171211T0600Z/
Monroe-Livingston-
Including the cities of Rochester and Geneseo
345 PM EST Sun Dec 10 2017

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM EST MONDAY...

* WHAT...Lake effect snow occurring. Plan on slippery road 
  conditions. Additional snow accumulations of 3 to 5 inches are 
  expected in the most persistent lake snows.

* WHERE...Southwest Monroe and Northern Livingston counties.

* WHEN...Until 1 AM Monday.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities and
  slippery travel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect 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.

&&

$$

Church
789 
WWUS41 KBUF 102331
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
631 PM EST Sun Dec 10 2017

NYZ010-011-110600-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T0600Z/
Northern Erie-Genesee-
Including the cities of Buffalo and Batavia
631 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 1 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Plan on difficult
  travel conditions. Additional snow accumulations of 3 to 6
  inches are expected in the most persistent lake snows, with
  storm totals of 14 to 20 inches in the most persistent lake
  snows.

* WHERE...Northern Erie and Genesee counties. Greatest snow
  amounts across the Buffalo Southtowns and southwest Genesee
  County.

* WHEN...Until 1 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4282 7797 4308 7795 4309 7805 4295 7848 
        4293 7870 4239 7962 4237 7959 4247 7922 4259 7890 
        4269 7853 
TIME Y17M12D10T2300Z-Y17M12D11T0300Z
COORD...4283 7812 4286 7817 4278 7875 4268 7913 
        4232 7975 4223 7976 4225 7948 4239 7881 4249 7850 
        4255 7817 
TIME Y17M12D11T0300Z-Y17M12D11T0600Z

$$

NYZ012-019-020-085-110745-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
631 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Plan on difficult
  travel conditions. Additional snow accumulations of 4 to 8
  inches are expected in the most persistent lake snows, with
  storm totals of 14 to 20 inches in the most persistent lake
  snows.

* WHERE...Western Wyoming, northern and western Chautauqua, 
  northwest Cattaraugus, and Southern Erie counties.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4282 7797 4308 7795 4309 7805 4295 7848 
        4293 7870 4239 7962 4237 7959 4247 7922 4259 7890 
        4269 7853 
TIME Y17M12D10T2300Z-Y17M12D11T0300Z
COORD...4283 7812 4286 7817 4278 7875 4268 7913 
        4232 7975 4223 7976 4225 7948 4239 7881 4249 7850 
        4255 7817 
TIME Y17M12D11T0300Z-Y17M12D11T0600Z
COORD...4234 7853 4256 7852 4256 7900 4251 7920 
        4233 7963 4225 7976 4206 7976 4207 7940 4215 7903 
        4217 7881 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ006>008-110745-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
631 PM EST Sun Dec 10 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Heavy lake effect snow occurring. Travel will be very 
  difficult to impossible. Additional snow accumulations of 6 to 
  12 inches are expected in the most persistent lake snows.

* WHERE...The Eastern Lake Ontario Region. Greatest snow amounts
  across southern and central Jefferson County, northern Oswego
  County, northern and western Lewis County.

* WHEN...Until 7 AM Monday.

* ADDITIONAL DETAILS...Narrow bands of heavy lake effect snow 
  will produce very low visibility and deep snow cover on roads 
  at times, leading to very difficult travel conditions.

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...4408 7515 4418 7541 4406 7600 4399 7614 
        4395 7636 4383 7629 4367 7623 4369 7573 4382 7551 
        4389 7519 
TIME Y17M12D10T2300Z-Y17M12D11T0600Z
COORD...4393 7515 4396 7523 4390 7543 4385 7586 
        4369 7617 4363 7618 4350 7605 4345 7552 4357 7526 
        4368 7520 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ003-013-110600-
/O.CON.KBUF.WW.Y.0023.000000T0000Z-171211T0600Z/
Monroe-Livingston-
Including the cities of Rochester and Geneseo
631 PM EST Sun Dec 10 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST
MONDAY...

* WHAT...Lake effect snow occurring. Plan on slippery road 
  conditions. Additional snow accumulations of 1 to 3 inches are 
  expected in the most persistent lake snows.

* WHERE...Southwest Monroe and Northern Livingston counties.

* WHEN...Until 1 AM Monday.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities and
  slippery travel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect 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.

&&

$$

Church
947 
WWUS41 KBUF 110545
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
1245 AM EST Mon Dec 11 2017

NYZ010-011-110645-
/O.CAN.KBUF.LE.W.0009.000000T0000Z-171211T0600Z/
Northern Erie-Genesee-
Including the cities of Buffalo and Batavia
1245 AM EST Mon Dec 11 2017

...LAKE EFFECT SNOW WARNING IS CANCELLED...

Lake effect snow has weakened across the area. Scattered snow
showers and flurries are possible overnight.

$$

NYZ003-013-110645-
/O.CAN.KBUF.WW.Y.0023.000000T0000Z-171211T0600Z/
Monroe-Livingston-
Including the cities of Rochester and Geneseo
1245 AM EST Mon Dec 11 2017

...WINTER WEATHER ADVISORY IS CANCELLED...

Lake effect snow has weakened across the area. Scattered snow
showers and flurries are possible overnight.

$$

NYZ012-019-020-085-111200-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
1245 AM EST Mon Dec 11 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST THIS
MORNING...

* WHAT...Lake effect snow occurring. Plan on difficult travel 
  conditions. Additional snow accumulations of up to 2 inches are 
  expected in the most persistent lake snows.

* WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie 
  counties.

* WHEN...Until 7 AM today.

* ADDITIONAL DETAILS...Be prepared for significant reductions in 
  visibility at times.

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...4282 7797 4308 7795 4309 7805 4295 7848 
        4293 7870 4239 7962 4237 7959 4247 7922 4259 7890 
        4269 7853 
TIME Y17M12D10T2300Z-Y17M12D11T0300Z
COORD...4283 7812 4286 7817 4278 7875 4268 7913 
        4232 7975 4223 7976 4225 7948 4239 7881 4249 7850 
        4255 7817 
TIME Y17M12D11T0300Z-Y17M12D11T0600Z
COORD...4234 7853 4256 7852 4256 7900 4251 7920 
        4233 7963 4225 7976 4206 7976 4207 7940 4215 7903 
        4217 7881 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$

NYZ006>008-111200-
/O.CON.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
1245 AM EST Mon Dec 11 2017

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST THIS
MORNING...

* WHAT...Heavy lake effect snow occurring. Plan on difficult 
  travel conditions. Additional snow accumulations of 2 to 4 
  inches are expected in the most persistent lake snows.

* WHERE...The Eastern Lake Ontario Region.

* WHEN...Until 7 AM today.

* ADDITIONAL DETAILS...Be prepared for significant reductions in 
  visibility at times.

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...4408 7515 4418 7541 4406 7600 4399 7614 
        4395 7636 4383 7629 4367 7623 4369 7573 4382 7551 
        4389 7519 
TIME Y17M12D10T2300Z-Y17M12D11T0600Z
COORD...4393 7515 4396 7523 4390 7543 4385 7586 
        4369 7617 4363 7618 4350 7605 4345 7552 4357 7526 
        4368 7520 
TIME Y17M12D11T0600Z-Y17M12D11T1200Z

$$
452 
WWUS41 KBUF 110848
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
348 AM EST Mon Dec 11 2017

NYZ006>008-012-019-020-085-111700-
/O.CAN.KBUF.LE.W.0009.000000T0000Z-171211T1200Z/
/O.NEW.KBUF.WS.A.0007.171212T0000Z-171213T2300Z/
Oswego-Jefferson-Lewis-Wyoming-Chautauqua-Cattaraugus-
Southern Erie-
Including the cities of Oswego, Watertown, Lowville, Warsaw, 
Jamestown, Olean, Orchard Park, and Springville
348 AM EST Mon Dec 11 2017

...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH
WEDNESDAY AFTERNOON...

* WHAT...Heavy snow and blowing snow possible. Travel will be very
  difficult. Total snow accumulations of greater than 10 inches
  possible.

* WHERE...Oswego, Jefferson, Lewis, Wyoming, Chautauqua, 
  Cattaraugus, and Southern Erie counties.

* WHEN...From this evening through Wednesday afternoon.

* ADDITIONAL DETAILS...Winds gusting as high as 45 mph will 
  cause areas of blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Begin needed preparations at home or with your vehicle. Travel
may become difficult, so plan accordingly.

&&

$$

NYZ001>005-010-011-111700-
/O.NEW.KBUF.WS.A.0007.171212T0000Z-171213T2300Z/
Niagara-Orleans-Monroe-Wayne-Northern Cayuga-Northern Erie-
Genesee-
Including the cities of Niagara Falls, Medina, Rochester, Newark,
Fair Haven, Buffalo, and Batavia
348 AM EST Mon Dec 11 2017

...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH
WEDNESDAY AFTERNOON...

* WHAT...Heavy snow and blowing snow possible. Travel will be very
  difficult. Total snow accumulations of greater than 8 inches 
  possible.

* WHERE...Niagara, Orleans, Monroe, Wayne, Northern Cayuga, 
  Northern Erie, and Genesee counties.

* WHEN...From this evening through Wednesday afternoon.

* ADDITIONAL DETAILS...Winds gusting as high as 45 mph will 
  cause areas of blowing and drifting snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Begin needed preparations at home or with your vehicle. Travel
may become difficult, so plan accordingly.

&&

$$

TMA

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 9, 3:43 AM ESTWinter Storm WatchBUFCattaraugus, Chautauqua, Erie, Jefferson, Lewis, Oswego and 1 more10 hr
Dec 9, 2:09 PM ESTSmall Craft AdvisoryBUF44 hr

Nearby

Lake Effect Snow Warnings in New York, 2017Every lake effect snow warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.