Severe Thunderstorm Warning 7, NWS Binghamton, NY

818 
WWUS51 KBGM 042252
SVSBGM

Severe Weather Statement
National Weather Service Binghamton NY
652 PM EDT FRI MAY 4 2018

NYC015-107-PAC015-115-042330-
/O.CON.KBGM.SV.W.0007.000000T0000Z-180504T2330Z/
Chemung NY-Tioga NY-Susquehanna PA-Bradford PA-
652 PM EDT FRI MAY 4 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHEASTERN CHEMUNG...SOUTHERN TIOGA...NORTHWESTERN SUSQUEHANNA
AND BRADFORD COUNTIES...

At 651 PM EDT, severe thunderstorms were located along a line
extending from near Candor to Ogdensburg, moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees, and power lines.

These severe storms will be near...
  Owego, Lounsberry and Tioga Center around 655 PM EDT.
  Apalachin around 705 PM EDT.
  Little Meadows around 710 PM EDT.
  Overton around 725 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4203 7610 4200 7610 4200 7604 4194 7591
      4155 7636 4158 7674 4160 7688 4180 7690
      4219 7644
TIME...MOT...LOC 2251Z 292DEG 36KT 4216 7632 4159 7699 

HAIL...<.75IN
WIND...60MPH
 
$$

BJT

Area Forecast Discussion
National Weather Service Binghamton NY
131 PM EDT Fri May 4 2018

.SYNOPSIS...
A strong cold front, will bring late day showers and
thunderstorms. Some storms could be severe. Later tonight and
Saturday, high pressure will bring dry weather, and seasonable
temperatures. A weak disturbance, could bring some showers back
into the area, by Sunday afternoon.

&&

.NEAR TERM /THROUGH SATURDAY/...
1 pm update... Still focused on potentially severe storms later
this afternoon. All details on such are still relevant from the
previous discussion below.

Once the front goes by, a drier and cooler air mass will follow
later tonight and Saturday.

Strong environmental flow should persist for a while behind the
front this evening, hence the continuation of the wind advisory.
Winds should slacken in the pre-dawn period, as the pressure
gradient relaxes.

1030 am update... Factors appear to be coming together for an
enhanced severe weather threat later this afternoon across
mainly our northern zones (northern Finger Lakes, Mohawk Valley,
and southern Tug Hill areas).

As of late morning, plenty of clouds remained over CNY/NEPA,
along with some residual showers. Warm advection generated
showers should continue to push eastward, and be largely out of
our forecast area by midday. As for the clouds, a look upstream
shows clearing working from OH/Lake Erie into western
NY/northwestern PA at this time, at the leading edge of a large
dry slot aloft rotating out of the Upper Midwest/OH Valley
regions (well seen on the various GOES-East Water Vapor channels
and the Air Mass RGB product). All indications are that this
drier air aloft will work across much of the forecast area this
afternoon, resulting in a thinning of the current cloud cover,
and eventual breaks of sunshine. As a result, we felt
comfortable accepting the HRRR model temperature forecast for
this afternoon, indicating highs near 80 across the
northern/far western portions of the region (Finger Lakes,
Mohawk Valley, and southern Tug Hill zones), generally 80-85
down in the Wyoming/Lackawanna Valleys of NEPA, and mostly mid-
upper 70s elsewhere.

The above mentioned temperatures, along with probable cooling
aloft from the northwest later in the afternoon, should be able
to generate ML CAPE in the 500-800 j/kg range, and perhaps near,
or just over 1000 j/kg across the Mohawk Valley. Model
agreement remains quite good that environmental winds will
increase significantly this afternoon, as the main upper trough
axis approaches, and the atmosphere becomes fairly well mixed.
This combination of shear and instability produces an enhanced
threat for convective wind damage later today, along any squall
lines that come through. The best chance of such is again over
northern areas, although it can't ruled out anywhere in
CNY/NEPA. High resolution model guidance shows the likelihood of
linear storm mode, although any more discrete cells would have
to be closely watched after 3-4 pm. The expected time window
for strong/severe storms is generally 3-8 pm. Our latest
hazardous weather briefing has recently been issued.

Please monitor for possible watches and warnings later today.

The forecast from later tonight into the weekend is addressed in
the discussion below.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/...
1205 PM update...

A wave moving through the upper atmosphere will push a few rain
showers into the Twin Tiers of New York and Pennsylvania
Saturday night, before a cold front drops down from Canada and
brings a higher chance for rain across the entire forecast area
on Sunday.

Rain showers will taper off Sunday night as high pressure
expands toward our region.

Temperatures will fall into the middle and upper-40s Saturday
night, rise into the 60s on Sunday, then fall into the lower-40s
Sunday night.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
An extended period of quiet, dry weather is expected from Monday
through at least Wednesday evening, as Canadian high pressure
drops into NY and controls our weather.

After a cool start on Monday, with highs around 60 degrees along
the NY/PA border, temperatures will rise into the lower-70s for
Tuesday and Wednesday along the Twin Tiers.

A frontal system will approach the region early Thursday and
bring another chance for showers.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
130 PM update...

Winds will increase this afternoon and become gusty as a fast-
moving cold front approaches from the west.

Strong thunderstorms, some severe, will race across the
terminals late this afternoon and early this evening, mainly
between 22z and 02z. These storms may produce damaging winds and
hail, while causing temporary visibility restrictions between
1SM and 4SM.

After the storms pass, skies will clear out and winds will
gradually die down overnight. Winds will continue to gust out of
the west at 20 to 30 knots through 6z before diminishing.

VFR conditions and sunny skies are forecast for Saturday.

Outlook...

Saturday night through Tuesday...VFR. Risk of some restrictions
in occasional rain on Sunday.

&&

.BGM WATCHES/WARNINGS/ADVISORIES...
PA...None.
NY...Wind Advisory from 5 PM this afternoon to 2 AM EDT Saturday
     for NYZ009-015>018-022-023-025-036-037-044>046-057.

&&

SYNOPSIS...MLJ
NEAR TERM...MLJ
SHORT TERM...DJP
LONG TERM...DJP
AVIATION...DJP

Hazardous Weather Outlook
National Weather Service Binghamton NY
100 PM EDT Fri May 4 2018

NYZ024-055-056-062-PAZ038>040-043-044-047-048-072-051700-
Chemung-Tioga-Broome-Sullivan-Bradford-Susquehanna-Northern Wayne-
Wyoming-Lackawanna-Luzerne-Pike-Southern Wayne-
100 PM EDT Fri May 4 2018

This Hazardous Weather Outlook is for central New York and
northeast Pennsylvania.

.DAY ONE...This Afternoon and Tonight.

Scattered thunderstorms are expected late this afternoon and
evening. A few of the storms could become severe, with damaging
winds. The most likely time frame for severe weather would be from 4
to 8 pm.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible later today.

NYZ009-015>018-022-023-025-036-037-044>046-057-051700-
Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Steuben-
Schuyler-Tompkins-Madison-Southern Oneida-Cortland-Chenango-Otsego-
Delaware-
100 PM EDT Fri May 4 2018

...WIND ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 2 AM EDT
SATURDAY...

This Hazardous Weather Outlook is for central New York.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.

Thunderstorms are expected later this afternoon and evening. A few
of the storms could become severe, with damaging winds. The most
likely time window for severe weather would be from 4 to 8 pm.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible later today.

Jurewicz

Special Weather Statement
National Weather Service Binghamton NY
519 PM EDT FRI MAY 4 2018

NYZ015-016-022-023-025-042215-
Steuben NY-Seneca NY-Yates NY-Schuyler NY-Tompkins NY-
519 PM EDT FRI MAY 4 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT...SOUTHEASTERN
SENECA...SCHUYLER...SOUTHERN YATES...STEUBEN AND NORTHWESTERN
TOMPKINS COUNTIES UNTIL 615 PM EDT...

At 518 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Guyanoga to near Avoca to Hartsville to 7
miles southwest of Wellsville to near Shinglehouse. Movement was east
at 30 mph.

Wind gusts up to 50 mph will be possible with these storms.

Strong thunderstorms will be near...
  Howard and Pulteney around 525 PM EDT.
  Bath and Canisteo around 530 PM EDT.
  Porter Corner around 535 PM EDT.
  Hammondsport and Rheims around 540 PM EDT.
  Urbana and Dundee around 545 PM EDT.
  Starkey and Cameron around 550 PM EDT.
  Hector and Tyrone around 555 PM EDT.
  Greenwood and Lodi around 600 PM EDT.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4227 7774 4238 7752 4264 7723 4265 7668
      4263 7667 4262 7637 4233 7669 4229 7678
      4229 7696 4221 7696 4200 7729 4200 7775
TIME...MOT...LOC 2118Z 273DEG 25KT 4259 7720 4238 7743 4225 7770 4204
7804 4191 7820

MLJ

Special Weather Statement
National Weather Service Binghamton NY
539 PM EDT FRI MAY 4 2018

NYZ009-016>018-025-036-037-044-042245-
Onondaga NY-Southern Oneida NY-Cortland NY-Southern Cayuga NY-
Seneca NY-Madison NY-Tompkins NY-Northern Oneida NY-
539 PM EDT FRI MAY 4 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT...CENTRAL ONEIDA...
SOUTHERN SENECA...MADISON...CAYUGA...NORTHERN CORTLAND...ONONDAGA AND
NORTHEASTERN TOMPKINS COUNTIES UNTIL 645 PM EDT...

At 539 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles north of Baldwinsville to near Camillus
to near Skaneateles to near Ledyard to Willard. Movement was east at
40 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Strong thunderstorms will be near...
  Baldwinsville and Skaneateles around 545 PM EDT.
  Syracuse and Aurora around 550 PM EDT.
  Cicero and Moravia around 555 PM EDT.
  Otisco and Lyndon around 600 PM EDT.
  Manlius and Sempronius around 605 PM EDT.
  Scott around 610 PM EDT.
  Sullivan and Pompey around 615 PM EDT.
  Canastota and Groton around 620 PM EDT.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4335 7537 4305 7534 4273 7564 4272 7589
      4263 7588 4256 7607 4262 7690 4267 7690
      4275 7669 4291 7651 4308 7637 4323 7639
      4321 7626 4324 7627 4324 7626 4320 7622
      4327 7621 4315 7589 4334 7588
TIME...MOT...LOC 2139Z 272DEG 33KT 4325 7632 4309 7630 4291 7644 4275
7662 4266 7685

MLJ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
601 PM EDT FRI MAY 04 2018

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

0559 PM     TSTM WND DMG     CAMPBELL                42.23N  77.20W
05/04/2018                   STEUBEN            NY   911 CALL CENTER

            TREES AND WIRES DOWN OVER ROADWAY, COUNTY RT 17 AND
            KING HILL RD

&&

HLC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
613 PM EDT FRI MAY 04 2018

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

0610 PM     TSTM WND GST     LANSING                 42.49N  76.49W
05/04/2018  E56 MPH          TOMPKINS           NY   SOCIAL MEDIA

&&

JAB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
624 PM EDT FRI MAY 04 2018

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

0622 PM     TSTM WND DMG     ITHACA                  42.44N  76.50W
05/04/2018                   TOMPKINS           NY   911 CALL CENTER

            TREE DOWN ON WIRES NEAR INTERSECTION OF ELMWOOD AVE AND
            ITHACA RD.

&&

HLC

Special Weather Statement
National Weather Service Binghamton NY
628 PM EDT FRI MAY 4 2018

NYZ024-055-PAZ038-042330-
Chemung NY-Tioga NY-Bradford PA-
628 PM EDT FRI MAY 4 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT...SOUTHEASTERN
CHEMUNG...SOUTHERN TIOGA AND BRADFORD COUNTIES UNTIL 730 PM EDT...

At 628 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Spencer to Wellsboro. Movement was east at
40 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Chemung, Elmira, Southport, Barton, Sayre, Waverly, Owego, Athens,
Towanda and Ridgebury.

LAT...LON 4226 7658 4203 7610 4200 7611 4200 7615
      4190 7613 4157 7663 4160 7688 4198 7692
TIME...MOT...LOC 2228Z 291DEG 36KT 4227 7655 4175 7730

BJT