Alert archive / New York / Special Weather Statements in 2017

Special Weather Statement, NWS Buffalo, NY

December 30, 20176 counties in New York

NWS Buffalo, NY issued this special weather statement at Dec 30, 2017, 5:59 PM EST for 6 counties in New York. It was in force for 91 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 30, 2017, 5:59 PM EST (22:59 UTC)
Expired: Dec 30, 2017, 7:30 PM EST
In force: 91 min
Issued by: NWS Buffalo, NY

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Niagara County, NY, Orleans County, NY, Wayne County, NY

The radar

The Buffalo radar (KBUF), 55 km from the middle of the area, began a volume at 22:59 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, 11.0 hours before the alert went out and 54 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 595 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Dec 30, 4:57 PM EST, 1 hour 2 minutes earlier.

Area forecast discussion, Dec 30, 4:57 PM EST, 1 hour 2 minutes before

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Hazardous weather outlook, Dec 30, 4:46 PM EST, 1 hour 13 minutes before

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In the hours before

Local storm report, Dec 30, 1:42 PM EST, 4 hours 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
142 PM EST SAT DEC 30 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     SNOW             WALES                   42.74N  78.51W
12/30/2017  M5.8 INCH        ERIE               NY   CO-OP OBSERVER

            24-HOUR SNOWFALL.

0800 AM     SNOW             2 ENE COLDEN            42.65N  78.61W
12/30/2017  M8.2 INCH        ERIE               NY   COCORAHS

            24-HOUR SNOWFALL.

0800 AM     SNOW             1 W LAKEVILLE           42.71N  78.95W
12/30/2017  M6.6 INCH        ERIE               NY   CO-OP OBSERVER

            24-HOUR SNOWFALL.

1130 AM     SNOW             2 SW FORESTVILLE        42.45N  79.20W
12/30/2017  M18.0 INCH       CHAUTAUQUA         NY   COCORAHS

            24-HOUR SNOWFALL.

&&

EVENT NUMBER BUF1702130
EVENT NUMBER BUF1702131
EVENT NUMBER BUF1702132
EVENT NUMBER BUF1702133

CHURCH

Special weather statement, Dec 30, 3:37 PM EST, 2 hours 22 minutes before

Special Weather Statement
National Weather Service Buffalo NY
337 PM EST SAT DEC 30 2017

NYZ004>006-302130-
Oswego-Wayne-Northern Cayuga-
337 PM EST SAT DEC 30 2017

...A BAND OF LAKE EFFECT SNOW WILL AFFECT NORTHEASTERN
WAYNE...NORTHERN CAYUGA AND SOUTHWESTERN OSWEGO COUNTIES...

At 335 PM EST, A band of heavy lake effect snow producing snow fall
rates of 2 to 3 inches per hour was located from near Red Creek to
Martville and Hannibal. This band of heavy snow will continue to
drift slowly south through late afternoon.

Locations impacted include...
Cato, Ira, Huron, Wolcott, Red Creek, Meridian, and South Hannibal.

Conditions can deteriorate rapidly in heavy lake effect snow. Be
prepared for snow covered roads and visibility of less than a
quarter mile. Slow down and allow extra time when traveling.

LAT...LON 4311 7647 4330 7719 4333 7715 4331 7697
      4334 7691 4335 7681 4325 7647 4323 7647
      4323 7648 4315 7647 4314 7649

HITCHCOCK

Local storm report, Dec 30, 4:16 PM EST, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
416 PM EST SAT DEC 30 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0345 PM     SNOW             EAST BAY PARK           43.29N  76.90W
12/30/2017  M4.0 INCH        WAYNE              NY   TRAINED SPOTTER

            130PM TO 345PM

&&

EVENT NUMBER BUF1702135

HITCHCOCK

Local storm report, Dec 30, 4:22 PM EST, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
422 PM EST SAT DEC 30 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0344 PM     SNOW             FULTON                  43.32N  76.42W
12/30/2017  M6.0 INCH        OSWEGO             NY   TRAINED SPOTTER

&&

EVENT NUMBER BUF1702136

AR

Special weather statement, Dec 30, 4:41 PM EST, 1 hour 18 minutes before

Special Weather Statement
National Weather Service Buffalo NY
441 PM EST SAT DEC 30 2017

NYZ002>006-302300-
Oswego-Orleans-Wayne-Monroe-Northern Cayuga-
441 PM EST SAT DEC 30 2017

...A BAND OF HEAVY LAKE EFFECT SNOW WILL MOVE ONSHORE...

At 436 PM EST, A band of lake effect snow producing snow fall rates
of 2 to 3 inches per hour was located along the Lake Ontario shore
from Orleans County to Northern Cayuga and far southwest Oswego
counties.

This band of heavy snow will move south and onshore along much of
the south shore of Lake Ontario from Lyndonville to Wolcott through
late afternoon, and reach as far south as about Route 31 by early
evening. Travel conditions will rapidly deteriorate as this band of
heavy snow moves onshore, including in the Rochester area.

Locations impacted include...
Rochester, Albion, Brockport, Ontario, Wolcott, Cato, South Hannibal.

Conditions can deteriorate rapidly in heavy lake effect snow. Be
prepared for snow covered roads and visibility of less than a
quarter mile. Slow down and allow extra time when traveling.

LAT...LON 4303 7650 4314 7789 4327 7844 4342 7837
      4339 7775 4328 7754 4333 7717 4331 7697
      4335 7681 4331 7645

HITCHCOCK

Special weather statement, Dec 30, 5:59 PM EST, 0 minutes before

Special Weather Statement
National Weather Service Buffalo NY
559 PM EST SAT DEC 30 2017

NYZ001>005-010>014-310030-
Ontario-Livingston-Wyoming-Orleans-Wayne-Genesee-Monroe-Niagara-
Northern Cayuga-Northern Erie-
559 PM EST SAT DEC 30 2017

...A BAND OF HEAVY LAKE EFFECT SNOW WILL MOVE SOUTH ACROSS THE
NIAGARA FRONTIER...ROCHESTER...AND AREAS SOUTHEAST OF LAKE
ONTARIO...

A band of heavy lake effect snow producing brief snow fall rates of
2 to 3 inches per hour will continue to move south off Lake Ontario
early this evening.

The heaviest snow will be brief, but will result in rapidly
deteriorating travel conditions with snow covered roads and
visibility less than a quarter mile. This includes the Greater
Rochester Area, northern half of the Buffalo Metro area, and much of
the Niagara Frontier and points southeast of Lake Ontario.

This includes the following highways...
 Interstate 390 between exits 7 and 12.
 Interstate 90 between exits 53 and 43.

Conditions can deteriorate rapidly in heavy lake effect snow. Be
prepared for snow covered roads and visibility of less than a
quarter mile. Slow down and allow extra time when traveling.

LAT...LON 4335 7890 4340 7789 4339 7775 4328 7754
      4333 7717 4331 7697 4339 7673 4313 7648
      4301 7696 4267 7792 4289 7891 4295 7892
      4300 7902 4306 7900 4308 7908 4315 7904
      4330 7909

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 30, 3:38 AM EST	Wind Chill Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	54 hr
Dec 30, 3:38 AM EST	Winter Weather Advisory	BUF	Wyoming	18 hr
Dec 30, 6:06 AM EST	Special Weather Statement	BUF	Chautauqua	84 min
Dec 30, 1:03 PM EST	Special Weather Statement	BUF	Oswego, Wayne	87 min
Dec 30, 2:23 PM EST	Wind Chill Warning	BUF	Jefferson, Lewis	43 hr
Dec 30, 3:37 PM EST	Special Weather Statement	BUF	Wayne	53 min
Dec 30, 4:41 PM EST	Special Weather Statement	BUF	Monroe, Orleans, Wayne	79 min

Nearby

Special Weather Statements in New York, 2017 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.