Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 16, NWS Buffalo, NY

June 13, 2018Jefferson County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 13, 2018, 5:57 PM EDT for Jefferson County, New York. It was in force for 78 min. 5 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: Jun 13, 2018, 5:57 PM EDT (21:57 UTC)
Expired: Jun 13, 2018, 7:15 PM EDT
In force: 78 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Jefferson County, NY

The radar

The Ft Drum radar (KTYX), 53 km from the middle of the area, began a volume at 21:58 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
Jun 13, 6:34 PM EDT	TSTM WND DMG	Clayton, NY	TREES AND WIRES DOWN
Jun 13, 6:37 PM EDT	TSTM WND DMG	2 Nnw Depauville, NY	LARGE TREE AND WIRES DOWN
Jun 13, 6:37 PM EDT	TSTM WND DMG	2 Nw Depauville, NY	TREE DOWN ON WOOD RD
Jun 13, 6:38 PM EDT	TSTM WND DMG	Depauville, NY	TREES AND WIRES DOWN
Jun 13, 6:59 PM EDT	TSTM WND DMG	Antwerp, NY	TREES AND WIRES 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
Jun 13, 4:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.0 hours before the alert went out and 235 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: 173 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

522 
WUUS51 KBUF 132157
SVRBUF
NYC045-132315-
/O.NEW.KBUF.SV.W.0016.180613T2157Z-180613T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
557 PM EDT WED JUN 13 2018

The National Weather Service in Buffalo has issued a

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

* Until 715 PM EDT..

* At 557 PM EDT, severe thunderstorms were located along a line
  extending from 24 miles northwest of Wellesley Island State Park to
  42 miles west of Stony Point, moving east at 65 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Watertown, Fort Drum, Stony Point, Clayton, Adams, Dexter, Glen
  Park and Redwood.

# 

This includes Interstate 81 between exits 39 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.

&&

LAT...LON 4423 7547 4368 7605 4372 7627 4378 7629
      4383 7636 4387 7635 4384 7644 4387 7650
      4391 7650 4396 7644 4396 7634 4402 7636
      4405 7642 4410 7643 4414 7635 4420 7631
      4422 7620 4429 7615 4435 7595 4440 7586
TIME...MOT...LOC 2157Z 269DEG 59KT 4452 7642 4400 7713 

HAIL...0.75IN
WIND...60MPH
 
$$

HSK

2 follow-up statements

672 
WWUS51 KBUF 132240
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
640 PM EDT WED JUN 13 2018

NYC045-132315-
/O.CON.KBUF.SV.W.0016.000000T0000Z-180613T2315Z/
Jefferson NY-
640 PM EDT WED JUN 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR JEFFERSON COUNTY...

At 639 PM EDT, severe thunderstorms were located along a line
extending from near Kring Point State Park to 9 miles north of Stony
Point, moving east at 55 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Watertown, Fort Drum, Stony Point, Clayton, Adams, Dexter, Glen Park
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.

&&

LAT...LON 4423 7547 4368 7605 4372 7627 4379 7629
      4383 7636 4387 7635 4384 7644 4387 7650
      4391 7650 4396 7644 4396 7634 4402 7636
      4405 7642 4410 7643 4414 7635 4420 7631
      4422 7620 4429 7614 4435 7596 4440 7586
TIME...MOT...LOC 2239Z 278DEG 49KT 4441 7592 4397 7633 

HAIL...0.75IN
WIND...60MPH
 
$$

Welch

904 
WWUS51 KBUF 132308
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
708 PM EDT WED JUN 13 2018

NYC045-132315-
/O.CON.KBUF.SV.W.0016.000000T0000Z-180613T2315Z/
Jefferson NY-
708 PM EDT WED JUN 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CENTRAL JEFFERSON COUNTY...

At 708 PM EDT, severe thunderstorms were located along a line
extending from 6 miles southeast of De Kalb to near West Carthage,
moving east at 65 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Watertown, Fort Drum, Stony Point, Adams, Dexter, Glen Park, Adams
Center and Henderson Harbor.

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.

&&

LAT...LON 4423 7547 4368 7605 4372 7627 4379 7629
      4383 7636 4396 7634 4410 7604 4432 7568
TIME...MOT...LOC 2308Z 269DEG 59KT 4442 7527 4398 7568 

HAIL...0.75IN
WIND...60MPH
 
$$

HSK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 10:14 PM EDT	Beach Hazards Statement	BUF	Chautauqua, Erie	17 hr
Jun 12, 10:14 PM EDT	Small Craft Advisory	BUF		46 hr
Jun 13, 3:50 PM EDT	Special Marine Warning	BUF		55 min
Jun 13, 4:26 PM EDT	Severe Thunderstorm Warning	BUF	Erie	28 min
Jun 13, 4:39 PM EDT	Special Marine Warning	BUF		66 min
Jun 13, 5:07 PM EDT	Special Marine Warning	BUF		83 min
Jun 13, 5:11 PM EDT	Special Weather Statement	BUF	Cattaraugus, Chautauqua	64 min
Jun 13, 5:17 PM EDT	Special Marine Warning	BUF		43 min
Jun 13, 5:32 PM EDT	Special Marine Warning	BUF		118 min
Jun 13, 5:50 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Erie, Livingston, Wyoming	70 min
Jun 13, 6:20 PM EDT	Special Marine Warning	BUF		55 min
Jun 13, 6:51 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	54 min
Jun 13, 7:01 PM EDT	Special Marine Warning	BUF		44 min
Jun 13, 7:43 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	62 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.