Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 15, NWS Buffalo, NY

May 1, 2017Jefferson County, Lewis County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 1, 2017, 6:09 PM EDT for Jefferson County, Lewis County, Oswego County, New York. It was in force for 66 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 1, 2017, 6:09 PM EDT (22:09 UTC)
Expired: May 1, 2017, 7:15 PM EDT
In force: 66 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

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

The radar

The Ft Drum radar (KTYX), 14 km from the middle of the area, began a volume at 22:09 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 1, 6:35 PM EDT	TSTM WND DMG	3 Sw Carthage, NY	TREES AND WIRES DOWN
May 1, 6:58 PM EDT	TSTM WND DMG	Harrisville, NY	NUMEROUS TREES AND LINES 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.

Issued	Product	Office	Lasted
May 1, 2:12 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.2 hours before the alert went out and 199 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: 581 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

717 
WUUS51 KBUF 012209
SVRBUF
NYC045-049-075-012315-
/O.NEW.KBUF.SV.W.0015.170501T2209Z-170501T2315Z/

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

The National Weather Service in Buffalo has issued a

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

* Until 715 PM EDT.

* At 608 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles northwest of Cedar Point State Park to near
  Henderson Harbor to near Selkirk Shores State Park, moving
  northeast at 50 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...
  Fort Drum, Carthage, Lowville, Redfield, Lowville, Theresa, 
  Clayton, Alexandria Bay, Wellesley Island.

This includes Interstate 81 between exits 49 and 52.
 
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 New
York.

LAT...LON 4410 7517 4361 7511 4342 7553 4348 7581
      4346 7582 4348 7591 4397 7587 4434 7603
      4435 7595 4440 7586
TIME...MOT...LOC 2208Z 235DEG 44KT 4428 7629 4394 7616 4351 7618 

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

HITCHCOCK

4 follow-up statements

732 
WWUS51 KBUF 012223
SVSBUF

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

NYC045-049-075-012315-
/O.CON.KBUF.SV.W.0015.000000T0000Z-170501T2315Z/
Jefferson NY-Lewis NY-Oswego NY-
623 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EASTERN JEFFERSON...LEWIS AND NORTHEASTERN OSWEGO COUNTIES...

At 622 PM EDT, severe thunderstorms were located along a line
extending from near Wellesley Island State Park to near Glen Park to
6 miles east of Pulaski, moving northeast at 50 mph.

HAZARD...70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. While not immediately 
         threatening, a tornado is possible with these storms.

Locations impacted include...
Watertown, Fort Drum, Carthage, Lowville, West Carthage, Redfield,
Herrings and Kring Point State Park.

This includes Interstate 81 between exits 49 and 52.
 
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 New
York.

LAT...LON 4410 7517 4361 7511 4342 7553 4348 7581
      4346 7582 4348 7591 4397 7587 4434 7603
      4435 7595 4440 7586
TIME...MOT...LOC 2222Z 235DEG 44KT 4437 7611 4403 7598 4360 7600 

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

Church

123 
WWUS51 KBUF 012247
SVSBUF

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

NYC045-049-075-012315-
/O.CON.KBUF.SV.W.0015.000000T0000Z-170501T2315Z/
Jefferson NY-Lewis NY-Oswego NY-
647 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN JEFFERSON...LEWIS AND EAST CENTRAL OSWEGO
COUNTIES...

At 647 PM EDT, severe thunderstorms were located along a line
extending from 6 miles northeast of Redwood to near Carthage to near
Highmarket, moving northeast at 50 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Fort Drum, Carthage, Lowville, West Carthage, Herrings, Kring Point
State Park, Highmarket and Redwood.

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 New
York.

LAT...LON 4342 7553 4349 7581 4395 7565 4435 7592
      4440 7586 4410 7517 4361 7511
TIME...MOT...LOC 2247Z 241DEG 43KT 4436 7569 4402 7556 4359 7559 

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

Church

510 
WWUS51 KBUF 012258
SVSBUF

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

NYC075-012308-
/O.CAN.KBUF.SV.W.0015.000000T0000Z-170501T2315Z/
Oswego NY-
658 PM EDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL OSWEGO 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 New
York.

LAT...LON 4347 7574 4394 7552 4430 7562 4410 7517
      4361 7511 4342 7553
TIME...MOT...LOC 2258Z 241DEG 43KT 4443 7552 4409 7540 4366 7542 

$$

NYC045-049-012315-
/O.CON.KBUF.SV.W.0015.000000T0000Z-170501T2315Z/
Jefferson NY-Lewis NY-
658 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN JEFFERSON AND LEWIS COUNTIES...

At 658 PM EDT, severe thunderstorms were located along a line
extending from 7 miles southeast of Edwardsville to 12 miles
northeast of Carthage to near Whetstone Gulf State Park, moving
northeast at 50 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Lowville, Highmarket, Whetstone Gulf State Park, New Bremen, Watson,
Martinsburg, Lyonsdale and Greig.

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 New
York.

LAT...LON 4347 7574 4394 7552 4430 7562 4410 7517
      4361 7511 4342 7553
TIME...MOT...LOC 2258Z 241DEG 43KT 4443 7552 4409 7540 4366 7542 

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

Church

246 
WWUS51 KBUF 012315
SVSBUF

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

NYC045-049-012325-
/O.EXP.KBUF.SV.W.0015.000000T0000Z-170501T2315Z/
Jefferson NY-Lewis NY-
715 PM EDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON AND
LEWIS COUNTIES HAS EXPIRED...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning has been allowed to expire.

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

LAT...LON 4347 7574 4394 7552 4430 7562 4410 7517
      4361 7511 4342 7553
TIME...MOT...LOC 2315Z 253DEG 41KT 4453 7523 4397 7511 4350 7540 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 8:20 PM EDT	Special Weather Statement	BUF	Ontario	40 min
Apr 30, 9:57 PM EDT	Special Weather Statement	BUF	Niagara	48 min
Apr 30, 10:09 PM EDT	Special Marine Warning	BUF		81 min
Apr 30, 10:34 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	41 min
May 1, 3:45 AM EDT	Lakeshore Flood Warning	BUF	Cayuga, Jefferson, Oswego, Wayne	60 hr
May 1, 6:16 AM EDT	Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	13 hr
May 1, 2:10 PM EDT	Special Marine Warning	BUF		95 min
May 1, 2:20 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	55 min
May 1, 2:40 PM EDT	Special Marine Warning	BUF		65 min
May 1, 2:41 PM EDT	Special Marine Warning	BUF		64 min
May 1, 3:00 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	60 min
May 1, 3:06 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	54 min
May 1, 3:26 PM EDT	Special Marine Warning	BUF		94 min
May 1, 3:47 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans, Wyoming	58 min
May 1, 3:50 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	55 min
May 1, 4:16 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans, Wyoming	14 min
May 1, 4:24 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans, Wyoming	51 min
May 1, 4:28 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston	62 min
May 1, 4:45 PM EDT	Areal Flood Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 5 more	3 hr
May 1, 4:49 PM EDT	Special Marine Warning	BUF		116 min
May 1, 4:52 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	53 min
May 1, 5:18 PM EDT	Small Craft Advisory	BUF		47 hr
May 1, 5:36 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	54 min
May 1, 5:38 PM EDT	Special Marine Warning	BUF		97 min
May 1, 5:46 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	59 min
May 1, 6:45 PM EDT	Special Marine Warning	BUF		60 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.