Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 23, NWS Buffalo, NY

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

NWS Buffalo, NY issued this severe thunderstorm warning at May 18, 2017, 5:28 PM EDT for Jefferson County, Lewis County, New York. It was in force for 47 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, 5:28 PM EDT (21:28 UTC)
Expired: May 18, 2017, 6:15 PM EDT
In force: 47 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

The radar

The Ft Drum radar (KTYX), 20 km from the middle of the area, began a volume at 21:32 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, 5:44 PM EDT	TSTM WND DMG	Croghan, NY	TREES DOWN
May 18, 5:48 PM EDT	TSTM WND DMG	New Bremen, NY	TREES DOWN IN NEW BREMEN

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, 9.5 hours before the alert went out and 191 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.

939 
WUUS51 KBUF 182128
SVRBUF
NYC045-049-182215-
/O.NEW.KBUF.SV.W.0023.170518T2128Z-170518T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
528 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...
  Central Lewis County in central New York...

* Until 615 PM EDT.

* At 527 PM EDT, a severe thunderstorm was located over Barnes
  Corners, or 14 miles southeast of Watertown, moving northeast at 55
  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...
  Barnes Corners, Denmark, New Bremen, Copenhagen, Croghan,
  Castorland, Belfort and Soft Maple Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4370 7584 4381 7584 4412 7523 4410 7517
      4393 7515
TIME...MOT...LOC 2127Z 240DEG 49KT 4378 7579 

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

Mitchell

2 follow-up statements

765 
WWUS51 KBUF 182153
SVSBUF

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

NYC045-182201-
/O.CAN.KBUF.SV.W.0023.000000T0000Z-170518T2215Z/
Jefferson NY-
553 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN JEFFERSON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled. 
However, the severe thunderstorm warning for Lewis County continues. 

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

LAT...LON 4381 7550 4389 7553 4410 7517 4393 7515
TIME...MOT...LOC 2151Z 240DEG 49KT 4394 7540 

$$

NYC049-182215-
/O.CON.KBUF.SV.W.0023.000000T0000Z-170518T2215Z/
Lewis NY-
553 PM EDT THU MAY 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHEASTERN LEWIS COUNTY...

At 551 PM EDT, a severe thunderstorm was located 10 miles east of
Carthage, or 20 miles east of Fort Drum, moving northeast at 55 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...
New Bremen, Croghan, Castorland, Belfort, Soft Maple Reservoir,
Kirschnerville, Beaver Falls and Indian River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4381 7550 4389 7553 4410 7517 4393 7515
TIME...MOT...LOC 2151Z 240DEG 49KT 4394 7540 

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

Mitchell

001 
WWUS51 KBUF 182219
SVSBUF

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

NYC049-182225-
/O.EXP.KBUF.SV.W.0023.000000T0000Z-170518T2215Z/
Lewis NY-
619 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LEWIS COUNTY HAS
EXPIRED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. However, a warning remains in effect for 
southeastern Lewis County.

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

LAT...LON 4381 7550 4389 7553 4410 7517 4393 7515
TIME...MOT...LOC 2215Z 240DEG 49KT 4410 7500 

$$

Mitchell

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, 5:41 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	64 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.