Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 100, NWS Buffalo, NY

August 4, 2017Jefferson County, Lewis County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 4, 2017, 6:38 PM EDT for Jefferson County, Lewis County, New York. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2017, 6:38 PM EDT (22:38 UTC)
Expired: Aug 4, 2017, 7:30 PM EDT
In force: 52 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Jefferson County, NY, Lewis County, NY

The radar

The Ft Drum radar (KTYX), 29 km from the middle of the area, began a volume at 22:40 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 4, 1:25 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.6 hours before the alert went out and 202 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: 160 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

878 
WUUS51 KBUF 042238
SVRBUF
NYC045-049-042330-
/O.NEW.KBUF.SV.W.0100.170804T2238Z-170804T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
638 PM EDT FRI AUG 4 2017

The National Weather Service in Buffalo has issued a

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

* Until 730 PM EDT.

* At 637 PM EDT, a cluster of severe thunderstorms was centered near 
  West Carthage, or 10 miles southeast of Fort Drum, moving 
  northeast at 40 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect wind damage to trees and power lines. 

* Locations impacted include...
  Fort Drum, Carthage, West Carthage, Herrings, Denmark, Black River,
  Philadelphia and Copenhagen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4380 7570 4396 7583 4435 7575 4410 7517
      4401 7516
TIME...MOT...LOC 2237Z 238DEG 35KT 4393 7567 

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

Smith

1 follow-up statement

299 
WWUS51 KBUF 042319
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
719 PM EDT FRI AUG 4 2017

NYC045-042327-
/O.CAN.KBUF.SV.W.0100.000000T0000Z-170804T2330Z/
Jefferson NY-
719 PM EDT FRI AUG 4 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 900 PM EDT for
central New York.

LAT...LON 4380 7570 4397 7559 4397 7555 4398 7554
      4401 7555 4401 7550 4405 7549 4406 7550
      4407 7548 4409 7551 4421 7543 4410 7517
      4401 7516
TIME...MOT...LOC 2317Z 238DEG 35KT 4417 7529 

$$

NYC049-042330-
/O.CON.KBUF.SV.W.0100.000000T0000Z-170804T2330Z/
Lewis NY-
719 PM EDT FRI AUG 4 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHERN LEWIS COUNTY...

At 717 PM EDT, a severe thunderstorm was located 8 miles southeast of
Fowler, or 25 miles east of Fort Drum, moving northeast at 40 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect wind damage to trees and power lines. 

Locations impacted include...
Denmark, Harrisville, Castorland, Lake Bonaparte, Indian River,
Natural Bridge and Diana Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4380 7570 4397 7559 4397 7555 4398 7554
      4401 7555 4401 7550 4405 7549 4406 7550
      4407 7548 4409 7551 4421 7543 4410 7517
      4401 7516
TIME...MOT...LOC 2317Z 238DEG 35KT 4417 7529 

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

Smith

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 9:28 PM EDT	Small Craft Advisory	BUF		54 hr
Aug 4, 8:45 AM EDT	Special Weather Statement	BUF	Wayne	30 min
Aug 4, 8:52 AM EDT	Special Marine Warning	BUF		53 min
Aug 4, 11:40 AM EDT	Special Marine Warning	BUF		65 min
Aug 4, 11:53 AM EDT	Special Weather Statement	BUF	Wayne	37 min
Aug 4, 12:22 PM EDT	Special Marine Warning	BUF		53 min
Aug 4, 12:27 PM EDT	Severe Thunderstorm Warning	BUF	Erie	63 min
Aug 4, 12:55 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	50 min
Aug 4, 1:05 PM EDT	Severe Thunderstorm Warning	BUF	Genesee	31 min
Aug 4, 1:08 PM EDT	Special Marine Warning	BUF		52 min
Aug 4, 1:13 PM EDT	Severe Thunderstorm Warning	BUF	Niagara, Orleans	62 min
Aug 4, 1:41 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	49 min
Aug 4, 1:59 PM EDT	Special Marine Warning	BUF		61 min
Aug 4, 3:00 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	45 min
Aug 4, 3:22 PM EDT	Special Marine Warning	BUF		53 min
Aug 4, 3:38 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	57 min
Aug 4, 3:42 PM EDT	Special Marine Warning	BUF		63 min
Aug 4, 4:02 PM EDT	Special Marine Warning	BUF		118 min
Aug 4, 4:14 PM EDT	Special Marine Warning	BUF		61 min
Aug 4, 4:17 PM EDT	Special Marine Warning	BUF		88 min
Aug 4, 4:26 PM EDT	Special Marine Warning	BUF		34 min
Aug 4, 4:27 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	33 min
Aug 4, 4:45 PM EDT	Special Marine Warning	BUF		2 hr
Aug 4, 4:46 PM EDT	Special Marine Warning	BUF		89 min
Aug 4, 5:00 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara	45 min
Aug 4, 5:04 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	41 min
Aug 4, 5:23 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston	67 min
Aug 4, 5:39 PM EDT	Special Marine Warning	BUF		36 min
Aug 4, 5:51 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	54 min
Aug 4, 7:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	66 min
Aug 4, 7:15 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Oswego, Wayne	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.