Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 24, NWS Buffalo, NY

May 18, 2017Jefferson County, Lewis County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 18, 2017, 5:41 PM EDT for Jefferson County, Lewis County, Oswego County, New York. It was in force for 64 min. 2 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: May 18, 2017, 5:41 PM EDT (21:41 UTC)
Expired: May 18, 2017, 6:45 PM EDT
In force: 64 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

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

The radar

The Ft Drum radar (KTYX), 25 km from the middle of the area, began a volume at 21:44 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 18, 5:48 PM EDT	TSTM WND DMG	New Bremen, NY	TREES DOWN IN NEW BREMEN
May 18, 6:07 PM EDT	TSTM WND DMG	Watson, NY	TREES DOWN ON NUMBER 4 ROAD

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 18, 3:36 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.7 hours before the alert went out and 172 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: 2076 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

456 
WUUS51 KBUF 182141
SVRBUF
NYC045-049-075-182245-
/O.NEW.KBUF.SV.W.0024.170518T2141Z-170518T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
541 PM EDT THU MAY 18 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southern Jefferson County in central New York...
  Lewis County in central New York...
  Northeastern Oswego County in central New York...

* Until 645 PM EDT.

* At 540 PM EDT, a severe thunderstorm was located over Redfield, or
  14 miles north of Camden, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines. 

* Locations impacted include...
  Lowville, Redfield, Highmarket, Whetstone Gulf State Park, New
  Bremen, Watson, Martinsburg and Williamstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4342 7553 4348 7581 4338 7586 4337 7590
      4369 7597 4394 7515 4361 7511
TIME...MOT...LOC 2140Z 244DEG 44KT 4353 7583 

HAIL...1.25IN
WIND...60MPH
 
$$

Mitchell

2 follow-up statements

083 
WWUS51 KBUF 182215
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
615 PM EDT THU MAY 18 2017

NYC045-075-182222-
/O.CAN.KBUF.SV.W.0024.000000T0000Z-170518T2245Z/
Jefferson NY-Oswego NY-
615 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN JEFFERSON AND
NORTHEASTERN OSWEGO COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
southern Jefferson County, however another warning remains in effect 
for northeastern Oswego County.

A severe thunderstorm watch remains in effect until 1100 PM EDT for
central New York.

LAT...LON 4342 7553 4354 7558 4376 7545 4394 7515
      4361 7511
TIME...MOT...LOC 2212Z 244DEG 44KT 4370 7535 

$$

NYC049-182245-
/O.CON.KBUF.SV.W.0024.000000T0000Z-170518T2245Z/
Lewis NY-
615 PM EDT THU MAY 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTHEASTERN LEWIS COUNTY...

At 612 PM EDT, a severe thunderstorm was located near Whetstone Gulf
State Park, or 15 miles north of Boonville, moving northeast at 50
mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines. 

Locations impacted include...
Whetstone Gulf State Park, Highmarket, Lyonsdale, Greig, Port Leyden,
Lyons Falls, Constableville and Turin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4342 7553 4354 7558 4376 7545 4394 7515
      4361 7511
TIME...MOT...LOC 2212Z 244DEG 44KT 4370 7535 

HAIL...1.25IN
WIND...60MPH
 
$$

Mitchell

727 
WWUS51 KBUF 182241
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
641 PM EDT THU MAY 18 2017

NYC049-182251-
/O.EXP.KBUF.SV.W.0024.000000T0000Z-170518T2245Z/
Lewis NY-
641 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LEWIS COUNTY WILL
EXPIRE AT 645 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore the warning will be
allowed to expire.

A severe thunderstorm watch remains in effect until 1100 PM EDT for
central New York.

LAT...LON 4342 7553 4354 7558 4376 7545 4394 7515
      4361 7511
TIME...MOT...LOC 2241Z 244DEG 44KT 4384 7494 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 1:35 PM EDT	Special Weather Statement	BUF	Chautauqua	25 min
May 18, 1:38 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	52 min
May 18, 2:36 PM EDT	Special Weather Statement	BUF	Wyoming	24 min
May 18, 2:41 PM EDT	Special Weather Statement	BUF	Ontario	34 min
May 18, 3:13 PM EDT	Special Weather Statement	BUF	Wyoming	32 min
May 18, 3:17 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie, Wyoming	43 min
May 18, 3:22 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	38 min
May 18, 3:51 PM EDT	Special Weather Statement	BUF	Livingston, Ontario	24 min
May 18, 3:57 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario, Wyoming	48 min
May 18, 4:05 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	40 min
May 18, 4:39 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	51 min
May 18, 5:25 PM EDT	Special Weather Statement	BUF	Cayuga	35 min
May 18, 5:28 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	47 min
May 18, 5:51 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	39 min
May 18, 6:17 PM EDT	Special Weather Statement	BUF	Allegany	28 min
May 18, 6:17 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	28 min
May 18, 6:45 PM EDT	Special Weather Statement	BUF	Lewis	45 min

Nearby

Severe Thunderstorm Warnings in New York, 2017 Every 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.