Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 7, NWS Buffalo, NY

May 4, 20184 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 4, 2018, 4:59 PM EDT for 4 counties in New York. It was in force for 61 min. 1 report 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: May 4, 2018, 4:59 PM EDT (20:59 UTC)
Expired: May 4, 2018, 6:00 PM EDT
In force: 61 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Cayuga County, NY, Jefferson County, NY, Lewis County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 45 km from the middle of the area, began a volume at 21:00 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

Time	Report	Where	Remark
May 4, 5:17 PM EDT	TSTM WND DMG	1 N Sterling, NY	POWERLINE DOWN NEAR STERLING NATURE CENTER

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.

Issued	Product	Office	Lasted
May 4, 2:44 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.0 hours before the alert went out and 208 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: 812 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

749 
WUUS51 KBUF 042059
SVRBUF
NYC011-045-049-075-042200-
/O.NEW.KBUF.SV.W.0007.180504T2059Z-180504T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
459 PM EDT FRI MAY 4 2018

The National Weather Service in Buffalo has issued a

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

* Until 600 PM EDT.

* At 459 PM EDT, a severe thunderstorm was located 8 miles northwest
  of Fair Haven Beach State Park, 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, Sandy Island Beach
  State Park, Pulaski, Redfield, Selkirk Shores State Park and Mexico
  Point State Park.

This includes Interstate 81 between exits 33 and 40.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4347 7573 4348 7581 4332 7588 4329 7672
      4339 7673 4345 7665 4356 7645 4356 7628
      4370 7626 4383 7574 4369 7555
TIME...MOT...LOC 2059Z 250DEG 51KT 4341 7683 

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

Church

2 follow-up statements

799 
WWUS51 KBUF 042136
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
536 PM EDT FRI MAY 4 2018

NYC011-042146-
/O.CAN.KBUF.SV.W.0007.000000T0000Z-180504T2200Z/
Cayuga NY-
536 PM EDT FRI MAY 4 2018

...THE SEVERE THUNDERSTORM WARNING FOR CAYUGA COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

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

LAT...LON 4347 7573 4348 7581 4333 7589 4332 7588
      4331 7624 4356 7645 4356 7628 4358 7626
      4370 7626 4383 7574 4369 7555
TIME...MOT...LOC 2136Z 250DEG 51KT 4359 7614 

$$

NYC045-049-075-042200-
/O.CON.KBUF.SV.W.0007.000000T0000Z-180504T2200Z/
Jefferson NY-Lewis NY-Oswego NY-
536 PM EDT FRI MAY 4 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTH CENTRAL JEFFERSON...SOUTHWESTERN LEWIS AND NORTHEASTERN
OSWEGO COUNTIES...

At 536 PM EDT, a severe thunderstorm was located over Pulaski, or
near Sandy Island Beach State Park, 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...
Sandy Island Beach State Park, Pulaski, Redfield, Selkirk Shores
State Park, Mexico Point State Park, Nine Mile Point, Hastings and
Richland.

This includes Interstate 81 between exits 33 and 40.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4347 7573 4348 7581 4333 7589 4332 7588
      4331 7624 4356 7645 4356 7628 4358 7626
      4370 7626 4383 7574 4369 7555
TIME...MOT...LOC 2136Z 250DEG 51KT 4359 7614 

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

Church

009 
WWUS51 KBUF 042159
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
559 PM EDT FRI MAY 4 2018

NYC045-049-075-042208-
/O.EXP.KBUF.SV.W.0007.000000T0000Z-180504T2200Z/
Jefferson NY-Lewis NY-Oswego NY-
559 PM EDT FRI MAY 4 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL JEFFERSON...
SOUTHWESTERN LEWIS AND NORTHEASTERN OSWEGO COUNTIES WILL EXPIRE AT
600 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Jefferson, Lewis and Oswego Counties.

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

LAT...LON 4347 7573 4348 7581 4333 7589 4332 7588
      4331 7624 4356 7645 4356 7628 4358 7626
      4370 7626 4383 7574 4369 7555
TIME...MOT...LOC 2158Z 270DEG 51KT 4369 7574 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 12:20 AM EDT	Dense Fog Advisory	BUF	Erie, Jefferson, Niagara	5 hr
May 4, 3:58 AM EDT	Wind Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	19 hr
May 4, 4:02 AM EDT	Gale Warning	BUF		16 hr
May 4, 2:18 PM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Wyoming	57 min
May 4, 3:35 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	55 min
May 4, 4:04 PM EDT	High Wind Warning	BUF	Erie, Genesee, Jefferson, Lewis, Niagara, Orleans	7 hr
May 4, 4:05 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	40 min
May 4, 4:10 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans, Wayne	35 min
May 4, 4:27 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	33 min
May 4, 4:46 PM EDT	Special Marine Warning	BUF		59 min
May 4, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	22 min
May 4, 5:32 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	58 min
May 4, 5:44 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	61 min

Nearby

Severe Thunderstorm Warnings in New York, 2018 Every severe thunderstorm warning in 2018

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.