Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 59, NWS Buffalo, NY

June 18, 2017Cayuga County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 18, 2017, 6:30 PM EDT for Cayuga County, Oswego County, New York. It was in force for 45 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 18, 2017, 6:30 PM EDT (22:30 UTC)
Expired
Jun 18, 2017, 7:15 PM EDT
In force
45 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
0.75 in
Wind
70.0 mph

Counties Cayuga County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 81 km from the middle of the area, began a volume at 22:31 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
Jun 18, 6:46 PM EDTTSTM WND DMGConquest, NYTREES AND WIRES DOWN.
Jun 18, 6:48 PM EDTTSTM WND DMGCato, NYTREES AND WIRES DOWN.
Jun 18, 6:51 PM EDTTSTM WND DMGMeridian, NYTREES AND WIRES DOWN.

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

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 18, 1:37 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.5 hours before the alert went out and 192 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 2017-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 199 joules per kilogram.LCLLFCEL10008507005003002001001 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 2017-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 square meters per square second.193958Sfc1 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
199 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1297 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.5

Open this sounding in Storm Lab

The text

As transmitted.

520 
WUUS51 KBUF 182230
SVRBUF
NYC011-075-182315-
/O.NEW.KBUF.SV.W.0059.170618T2230Z-170618T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
630 PM EDT SUN JUN 18 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Cayuga County in central New York...
  Southwestern Oswego County in central New York...

* Until 715 PM EDT.

* At 630 PM EDT, severe thunderstorms were located along a line
  extending from Chimney Bluffs State Park to near Clyde, moving
  northeast at 60 mph.

  HAZARD...70 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings. 

* Locations impacted include...
  Oswego, Fulton, Fair Haven Beach State Park, Weedsport, Cato,
  Mexico Point State Park, Nine Mile Point and Battle Island State
  Park.

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

This is a DANGEROUS SITUATION. These storms may produce widespread 
wind damage across. SEEK SHELTER NOW inside a sturdy structure and 
stay away from windows!

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

&&

LAT...LON 4327 7621 4324 7621 4322 7619 4320 7621
      4324 7626 4324 7627 4323 7626 4320 7627
      4323 7631 4323 7648 4315 7647 4314 7649
      4311 7647 4310 7650 4303 7649 4303 7671
      4340 7672 4342 7669 4359 7621 4324 7616
TIME...MOT...LOC 2230Z 238DEG 52KT 4327 7692 4301 7683 

HAIL...<.75IN
WIND...70MPH
 
$$

HITCHCOCK
2 follow-up statements
608 
WWUS51 KBUF 182254
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
654 PM EDT SUN JUN 18 2017

NYC011-075-182315-
/O.CON.KBUF.SV.W.0059.000000T0000Z-170618T2315Z/
Cayuga NY-Oswego NY-
654 PM EDT SUN JUN 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CAYUGA AND SOUTHWESTERN OSWEGO COUNTIES...

At 654 PM EDT, severe thunderstorms were located along a line
extending from near Oswego to Plainville, moving east at 60 mph.

HAZARD...70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

Locations impacted include...
Oswego, Fulton, Fair Haven Beach State Park, Weedsport, Cato, Mexico
Point State Park, Nine Mile Point and Battle Island State Park.

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.

&&

LAT...LON 4327 7621 4324 7621 4322 7619 4320 7621
      4324 7626 4324 7627 4323 7626 4320 7627
      4323 7631 4323 7648 4315 7647 4314 7649
      4311 7647 4310 7650 4303 7649 4303 7671
      4340 7672 4342 7669 4359 7621 4324 7616
TIME...MOT...LOC 2254Z 270DEG 52KT 4344 7655 4318 7646 

HAIL...<.75IN
WIND...70MPH
 
$$

Smith
427 
WWUS51 KBUF 182314 RRA
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
714 PM EDT SUN JUN 18 2017

NYC011-075-182324-
/O.EXP.KBUF.SV.W.0059.000000T0000Z-170618T2315Z/
Cayuga NY-Oswego NY-
714 PM EDT SUN JUN 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR CAYUGA AND SOUTHWESTERN OSWEGO
COUNTIES WILL EXPIRE AT 715 PM EDT...
    
The storms which prompted the warning have moved to the east.
Therefore the warning will be allowed to expire.

A severe thunderstorm watch remains in effect until 900 PM EDT for
central and western New York.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Buffalo.

LAT...LON 4327 7621 4324 7621 4322 7619 4320 7621
      4324 7626 4324 7627 4323 7626 4320 7627
      4323 7631 4323 7648 4315 7647 4314 7649
      4311 7647 4310 7650 4303 7649 4303 7671
      4340 7672 4342 7669 4359 7621 4324 7616
TIME...MOT...LOC 2314Z 270DEG 52KT 4358 7624 4332 7615 

$$

Smith

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 10:50 PM EDTFlash Flood WatchBUFAllegany, Cattaraugus, Cayuga, Chautauqua, Erie, Jefferson and 7 more22 hr
Jun 18, 2:07 PM EDTSpecial Weather StatementBUFChautauqua38 min
Jun 18, 2:14 PM EDTSpecial Marine WarningBUF61 min
Jun 18, 2:23 PM EDTSevere Thunderstorm WarningBUFChautauqua37 min
Jun 18, 2:24 PM EDTSpecial Marine WarningBUF66 min
Jun 18, 2:37 PM EDTSpecial Weather StatementBUFWayne53 min
Jun 18, 2:41 PM EDTSevere Thunderstorm WarningBUFChautauqua49 min
Jun 18, 3:04 PM EDTSpecial Marine WarningBUF86 min
Jun 18, 3:27 PM EDTSpecial Marine WarningBUF63 min
Jun 18, 3:45 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua60 min
Jun 18, 3:53 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Erie, Wyoming67 min
Jun 18, 4:05 PM EDTSpecial Weather StatementBUFOswego40 min
Jun 18, 4:29 PM EDTSevere Thunderstorm WarningBUFGenesee, Orleans31 min
Jun 18, 4:40 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus65 min
Jun 18, 4:49 PM EDTSevere Thunderstorm WarningBUFLivingston, Wyoming56 min
Jun 18, 4:53 PM EDTSpecial Weather StatementBUFLewis67 min
Jun 18, 4:54 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Wyoming51 min
Jun 18, 5:14 PM EDTSpecial Weather StatementBUFLewis61 min
Jun 18, 5:16 PM EDTSevere Thunderstorm WarningBUFLewis59 min
Jun 18, 5:19 PM EDTSevere Thunderstorm WarningBUFLivingston, Monroe, Ontario, Wayne56 min
Jun 18, 5:21 PM EDTSpecial Marine WarningBUF54 min
Jun 18, 5:28 PM EDTSevere Thunderstorm WarningBUFAllegany, Livingston, Wyoming47 min
Jun 18, 5:46 PM EDTSevere Thunderstorm WarningBUFOswego59 min
Jun 18, 6:01 PM EDTSpecial Marine WarningBUF59 min
Jun 18, 6:11 PM EDTSevere Thunderstorm WarningBUFOntario, Wayne49 min
Jun 18, 6:41 PM EDTSevere Thunderstorm WarningBUFChautauqua64 min
Jun 18, 6:44 PM EDTSpecial Marine WarningBUF61 min
Jun 18, 7:02 PM EDTSpecial Marine WarningBUF28 min
Jun 18, 7:13 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego62 min
Jun 18, 7:36 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua54 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.