Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 14, NWS Buffalo, NY

May 1, 2017Cayuga County, Ontario County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 1, 2017, 5:46 PM EDT for Cayuga County, Ontario County, Wayne County, New York. It was in force for 59 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
May 1, 2017, 5:46 PM EDT (21:46 UTC)
Expired
May 1, 2017, 6:45 PM EDT
In force
59 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Cayuga County, NY, Ontario County, NY, Wayne County, NY

The radar

The Binghamton radar (KBGM), 113 km from the middle of the area, began a volume at 21:48 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 1, 2:12 PM EDTTornado WatchSPC8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.8 hours before the alert went out and 154 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 2017-05-01Temperature 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 2017-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 306 square meters per square second.19395878Sfc1 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
1242 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
306 m²/s²
0-3 km storm-relative helicity
318 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

785 
WUUS51 KBUF 012146
SVRBUF
NYC011-069-117-012245-
/O.NEW.KBUF.SV.W.0014.170501T2146Z-170501T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
546 PM EDT MON MAY 1 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wayne County in western New York...
  Cayuga County in central New York...
  Northeastern Ontario County in western New York...

* Until 645 PM EDT.

* At 546 PM EDT, a severe thunderstorm was located 7 miles south of
  Clifton Springs, or 7 miles east of Canandaigua, moving east at 55
  mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Geneva, Canandaigua, Newark, Lyons, Clifton Springs, Clyde, Phelps
  and Weedsport.

This includes Interstate 90 between exits 43 and 40.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 1000 PM EDT for central and
western New York.

LAT...LON 4302 7725 4315 7647 4314 7649 4311 7647
      4310 7650 4303 7650 4301 7696 4276 7698
      4276 7728
TIME...MOT...LOC 2146Z 251DEG 50KT 4286 7714 

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

Church
2 follow-up statements
675 
WWUS51 KBUF 012215
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
615 PM EDT MON MAY 1 2017

NYC069-012223-
/O.CAN.KBUF.SV.W.0014.000000T0000Z-170501T2245Z/
Ontario NY-
615 PM EDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ONTARIO COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1000 PM EDT for central and
western New York.

LAT...LON 4301 7685 4311 7672 4311 7669 4314 7649
      4311 7647 4310 7650 4303 7650
TIME...MOT...LOC 2213Z 250DEG 51KT 4319 7645 4304 7657 4293 7665 4277
7674

$$

NYC011-117-012245-
/O.CON.KBUF.SV.W.0014.000000T0000Z-170501T2245Z/
Wayne NY-Cayuga NY-
615 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTHEASTERN WAYNE AND CAYUGA COUNTIES...

At 613 PM EDT, severe thunderstorms were located along a line 
extending from Lysander to Weedsport to near Throopsville, moving 
east at 60 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Weedsport, Montezuma, Savannah and Port Byron. 

This includes Interstate 90 near exit 40.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 1000 PM EDT for central and
western New York.

LAT...LON 4301 7685 4311 7672 4311 7669 4314 7649
      4311 7647 4310 7650 4303 7650
TIME...MOT...LOC 2213Z 250DEG 51KT 4319 7645 4304 7657 4293 7665 4277
7674

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

JJR
155 
WWUS51 KBUF 012239
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
639 PM EDT MON MAY 1 2017

NYC011-117-012248-
/O.EXP.KBUF.SV.W.0014.000000T0000Z-170501T2245Z/
Wayne NY-Cayuga NY-
639 PM EDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WAYNE AND CAYUGA
COUNTIES WILL EXPIRE AT 645 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 1000 PM EDT for central New
York.

LAT...LON 4301 7685 4311 7672 4311 7669 4314 7649
      4311 7647 4310 7650 4303 7650
TIME...MOT...LOC 2238Z 251DEG 50KT 4330 7600 4315 7612 4304 7620 4288
7629

$$

JJR

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 8:20 PM EDTSpecial Weather StatementBUFOntario40 min
Apr 30, 9:57 PM EDTSpecial Weather StatementBUFNiagara48 min
Apr 30, 10:09 PM EDTSpecial Marine WarningBUF81 min
Apr 30, 10:34 PM EDTSevere Thunderstorm WarningBUFErie, Niagara41 min
May 1, 3:45 AM EDTLakeshore Flood WarningBUFCayuga, Jefferson, Oswego, Wayne60 hr
May 1, 6:16 AM EDTFlood WatchBUFAllegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more13 hr
May 1, 2:10 PM EDTSpecial Marine WarningBUF95 min
May 1, 2:20 PM EDTSevere Thunderstorm WarningBUFChautauqua55 min
May 1, 2:40 PM EDTSpecial Marine WarningBUF65 min
May 1, 2:41 PM EDTSpecial Marine WarningBUF64 min
May 1, 3:00 PM EDTSevere Thunderstorm WarningBUFErie, Niagara60 min
May 1, 3:06 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie54 min
May 1, 3:26 PM EDTSpecial Marine WarningBUF94 min
May 1, 3:47 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Niagara, Orleans, Wyoming58 min
May 1, 3:50 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus55 min
May 1, 4:16 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Orleans, Wyoming14 min
May 1, 4:24 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Orleans, Wyoming51 min
May 1, 4:28 PM EDTSevere Thunderstorm WarningBUFAllegany, Livingston62 min
May 1, 4:45 PM EDTAreal Flood WarningBUFAllegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 5 more3 hr
May 1, 4:49 PM EDTSpecial Marine WarningBUF116 min
May 1, 4:52 PM EDTSevere Thunderstorm WarningBUFLivingston, Monroe, Ontario, Wayne53 min
May 1, 5:18 PM EDTSmall Craft AdvisoryBUF47 hr
May 1, 5:36 PM EDTSevere Thunderstorm WarningBUFJefferson, Oswego54 min
May 1, 5:38 PM EDTSpecial Marine WarningBUF97 min
May 1, 6:09 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego66 min
May 1, 6:45 PM EDTSpecial Marine WarningBUF60 min

Nearby

Severe Thunderstorm Warnings in New York, 2017Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.