Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 94, NWS Buffalo, NY

August 4, 2017Jefferson County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 4, 2017, 3:38 PM EDT for Jefferson County, New York. It was in force for 57 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
Aug 4, 2017, 3:38 PM EDT (19:38 UTC)
Expired
Aug 4, 2017, 4:35 PM EDT
In force
57 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Jefferson County, NY

The radar

The Ft Drum radar (KTYX), 48 km from the middle of the area, began a volume at 19:39 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

TimeReportWhereRemark
Aug 4, 3:50 PM EDTTSTM WND DMGPhiladelphia, NYTREES AND POWERLINES DOWN
Aug 4, 4:22 PM EDTTSTM WND DMGRedwood, NYTREES AND POWERLINES 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.

IssuedProductOfficeLasted
Aug 4, 1:25 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.6 hours before the alert went out and 223 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2017-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 160 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2017-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

712 
WUUS51 KBUF 041938
SVRBUF
NYC045-042045-
/O.NEW.KBUF.SV.W.0094.170804T1938Z-170804T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
338 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...

* Until 445 PM EDT.

* At 337 PM EDT, a severe thunderstorm was located over Fort Drum,
  moving north at 25 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines. 

* Locations impacted include...
  Watertown, Fort Drum, Carthage, West Carthage, Herrings, Redwood,
  Black River and Philadelphia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4440 7584 4437 7578 4422 7546 4416 7549
      4411 7554 4410 7553 4397 7561 4398 7589
TIME...MOT...LOC 1937Z 189DEG 21KT 4405 7576 

HAIL...1.00IN
WIND...60MPH
 
$$

Smith
2 follow-up statements
067 
WWUS51 KBUF 042003
SVSBUF

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

NYC045-042045-
/O.CON.KBUF.SV.W.0094.000000T0000Z-170804T2045Z/
Jefferson NY-
403 PM EDT FRI AUG 4 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHEASTERN JEFFERSON COUNTY...

At 402 PM EDT, a severe thunderstorm was located 8 miles north of
Fort Drum, moving north at 20 mph.

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

SOURCE...Trained weather spotters have reported wind damage with 
         this storm. 

IMPACT...Minor damage to vehicles is possible. Wind damage to trees 
         and power lines is occuring. 

Locations impacted include...
Redwood, Philadelphia, Theresa, Antwerp, Plessis, Oxbow and
Muskellunge Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4438 7581 4427 7557 4411 7567 4413 7587
      4440 7584
TIME...MOT...LOC 2002Z 193DEG 18KT 4417 7572 

HAIL...1.00IN
WIND...60MPH
 
$$

Smith
469 
WWUS51 KBUF 042035
SVSBUF

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

NYC045-042044-
/O.CAN.KBUF.SV.W.0094.000000T0000Z-170804T2045Z/
Jefferson NY-
435 PM EDT FRI AUG 4 2017

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

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

LAT...LON 4438 7581 4427 7557 4411 7567 4413 7587
      4440 7584
TIME...MOT...LOC 2032Z 189DEG 21KT 4436 7568 

$$

Smith

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 9:28 PM EDTSmall Craft AdvisoryBUF54 hr
Aug 4, 8:45 AM EDTSpecial Weather StatementBUFWayne30 min
Aug 4, 8:52 AM EDTSpecial Marine WarningBUF53 min
Aug 4, 11:40 AM EDTSpecial Marine WarningBUF65 min
Aug 4, 11:53 AM EDTSpecial Weather StatementBUFWayne37 min
Aug 4, 12:22 PM EDTSpecial Marine WarningBUF53 min
Aug 4, 12:27 PM EDTSevere Thunderstorm WarningBUFErie63 min
Aug 4, 12:55 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie50 min
Aug 4, 1:05 PM EDTSevere Thunderstorm WarningBUFGenesee31 min
Aug 4, 1:08 PM EDTSpecial Marine WarningBUF52 min
Aug 4, 1:13 PM EDTSevere Thunderstorm WarningBUFNiagara, Orleans62 min
Aug 4, 1:41 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Wyoming49 min
Aug 4, 1:59 PM EDTSpecial Marine WarningBUF61 min
Aug 4, 3:00 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego45 min
Aug 4, 3:22 PM EDTSpecial Marine WarningBUF53 min
Aug 4, 3:42 PM EDTSpecial Marine WarningBUF63 min
Aug 4, 4:02 PM EDTSpecial Marine WarningBUF118 min
Aug 4, 4:14 PM EDTSpecial Marine WarningBUF61 min
Aug 4, 4:17 PM EDTSpecial Marine WarningBUF88 min
Aug 4, 4:26 PM EDTSpecial Marine WarningBUF34 min
Aug 4, 4:27 PM EDTSevere Thunderstorm WarningBUFJefferson, Oswego33 min
Aug 4, 4:45 PM EDTSpecial Marine WarningBUF2 hr
Aug 4, 4:46 PM EDTSpecial Marine WarningBUF89 min
Aug 4, 5:00 PM EDTSevere Thunderstorm WarningBUFErie, Genesee, Niagara45 min
Aug 4, 5:04 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego41 min
Aug 4, 5:23 PM EDTSevere Thunderstorm WarningBUFAllegany, Livingston67 min
Aug 4, 5:39 PM EDTSpecial Marine WarningBUF36 min
Aug 4, 5:51 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego54 min
Aug 4, 6:38 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis52 min
Aug 4, 7:09 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego66 min
Aug 4, 7:15 PM EDTSevere Thunderstorm WarningBUFCayuga, Ontario, Oswego, Wayne60 min

Nearby

Severe Thunderstorm Warnings in New York, 2017Every 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.