Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 13, NWS Buffalo, NY

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

NWS Buffalo, NY issued this severe thunderstorm warning at May 1, 2017, 5:36 PM EDT for Jefferson County, Oswego County, New York. It was in force for 54 min. 6 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, 5:36 PM EDT (21:36 UTC)
Expired: May 1, 2017, 6:30 PM EDT
In force: 54 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Jefferson County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 51 km from the middle of the area, began a volume at 21:35 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, 5:46 PM EDT	TSTM WND DMG	1 W Oswego, NY	LIGHT POST DOWNED ON SUNY OSWEGO CAMPUS
May 1, 5:48 PM EDT	TSTM WND GST 58	Oswego, NY
May 1, 5:48 PM EDT	TSTM WND GST 60	1 W Oswego, NY	MEASURED ON SUNY OSWEGO CAMPUS.
May 1, 6:12 PM EDT	TSTM WND DMG	Chaumont, NY	TREE DOWN
May 1, 6:16 PM EDT	TSTM WND DMG	Altmar, NY	TREE DOWN ON WIRES
May 1, 6:22 PM EDT	TSTM WND DMG	Watertown, NY	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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.6 hours before the alert went out and 224 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: 1242 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 306 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

976 
WUUS51 KBUF 012136
SVRBUF
NYC045-075-012230-
/O.NEW.KBUF.SV.W.0013.170501T2136Z-170501T2230Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Central Jefferson County in central New York...
  Northern Oswego County in central New York...

* Until 630 PM EDT.

* At 536 PM EDT, severe thunderstorms were located along a line
  extending from 26 miles west of Cedar Point State Park to 15 miles
  southwest of Stony Point to near 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...
  Watertown, Oswego, Sandy Island Beach State Park, Stony Point,
  Pulaski, Clayton, Adams and Dexter.

This includes Interstate 81 between exits 35 and 48, and between
exits 50 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 4398 7583 4349 7588 4342 7669 4356 7645
      4357 7628 4369 7626 4378 7629 4383 7636
      4387 7635 4385 7647 4390 7650 4396 7644
      4396 7634 4402 7636 4410 7643 4414 7635
      4420 7631 4422 7620 4429 7615 4435 7598
TIME...MOT...LOC 2136Z 248DEG 52KT 4413 7673 4375 7658 4338 7667 

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

HITCHCOCK

3 follow-up statements

308 
WWUS51 KBUF 012201
SVSBUF

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

NYC045-075-012230-
/O.CON.KBUF.SV.W.0013.000000T0000Z-170501T2230Z/
Jefferson NY-Oswego NY-
601 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL JEFFERSON AND NORTHEASTERN OSWEGO COUNTIES...

At 600 PM EDT, severe thunderstorms were located along a line
extending from 10 miles west of Cedar Point State Park to near
Henderson Harbor to near Mexico Point State Park, moving northeast at
45 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...
Watertown, Sandy Island Beach State Park, Stony Point, Pulaski,
Clayton, Adams, Dexter and Glen Park.

This includes Interstate 81 between exits 35 and 48, and between
exits 50 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 4398 7583 4349 7588 4344 7643 4358 7626
      4369 7626 4379 7629 4383 7636 4387 7635
      4385 7647 4390 7650 4396 7644 4396 7634
      4402 7636 4410 7643 4414 7635 4420 7631
      4422 7619 4429 7614 4435 7598
TIME...MOT...LOC 2200Z 241DEG 40KT 4423 7642 4387 7626 4347 7631 

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

HITCHCOCK

345 
WWUS51 KBUF 012222
SVSBUF

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

NYC045-075-012230-
/O.CON.KBUF.SV.W.0013.000000T0000Z-170501T2230Z/
Jefferson NY-Oswego NY-
622 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL JEFFERSON AND NORTHEASTERN OSWEGO COUNTIES...

At 621 PM EDT, severe thunderstorms were located along a line
extending from near Wellesley Island State Park to Watertown to 7
miles west of Redfield, 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. While not immediately 
         likely, a tornado is possible with this storm.

Locations impacted include...
Watertown, Sandy Island Beach State Park, Stony Point, Pulaski,
Clayton, Adams, Dexter and Glen Park.

This includes Interstate 81 between exits 36 and 48, and between
exits 50 and 51.
 
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 4398 7583 4349 7588 4353 7618 4369 7626
      4379 7629 4383 7636 4396 7634 4402 7636
      4410 7643 4414 7635 4420 7631 4420 7624
      4422 7619 4429 7614 4435 7599
TIME...MOT...LOC 2221Z 248DEG 52KT 4433 7607 4397 7591 4357 7596 

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

Church

381 
WWUS51 KBUF 012231
SVSBUF

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

NYC045-075-012240-
/O.EXP.KBUF.SV.W.0013.000000T0000Z-170501T2230Z/
Jefferson NY-Oswego NY-
631 PM EDT MON MAY 1 2017

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

Remember, a Severe Thunderstorm Warning still remains in effect for 
western Jefferson and Oswego as well as Lewis counties.

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

LAT...LON 4398 7583 4349 7588 4353 7618 4369 7626
      4379 7629 4383 7636 4396 7634 4402 7636
      4410 7643 4414 7635 4420 7631 4420 7624
      4422 7619 4429 7614 4435 7599
TIME...MOT...LOC 2230Z 248DEG 52KT 4438 7591 4402 7575 4362 7580 

$$

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, 5:38 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, 6:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	66 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.