Alert archive / New York / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 47, NWS Buffalo, NY

July 13, 2020Jefferson County, Lewis County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2020, 5:05 PM EDT for Jefferson County, Lewis County, New York. It was in force for 55 min. 1 report 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: Jul 13, 2020, 5:05 PM EDT (21:05 UTC)
Expired: Jul 13, 2020, 6:00 PM EDT
In force: 55 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Jefferson County, NY, Lewis County, NY

The radar

The Ft Drum radar (KTYX), 41 km from the middle of the area, began a volume at 21:06 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
Jul 13, 5:06 PM EDT	FUNNEL CLOUD	9 Nnw Watertown, NY	PICTURES VIA BROADCAST MEDIA OF BRIEF FUNNEL CLOUD. BASED ON RADAR, LOCATION ESTIMATED AS APPROXIMATELY 9 MILES NW OF WATERTOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.1 hours before the alert went out and 214 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: 66 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1081 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

615 
WUUS51 KBUF 132105
SVRBUF
NYC045-049-132200-
/O.NEW.KBUF.SV.W.0047.200713T2105Z-200713T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
505 PM EDT Mon Jul 13 2020

The National Weather Service in Buffalo has issued a

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

* Until 600 PM EDT..

* At 503 PM EDT, two severe thunderstorms were located in Northern 
  Jefferson County, one was located 7 miles north of Glen Park, or 
  10 miles north of Watertown, moving east at 10 mph, the other 
  storm is located near Antwerp, moving southeast at 15 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to roofs, siding, and trees.

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

 This includes Interstate 81 between exits 48 and 49.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4414 7528 4388 7566 4413 7615 4432 7566
TIME...MOT...LOC 2103Z 292DEG 7KT 4412 7597 

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

Welch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:31 AM EDT	Special Weather Statement	BUF	Jefferson	29 min
Jul 13, 3:54 AM EDT	Areal Flood Warning	BUF	Jefferson	3 hr
Jul 13, 4:07 AM EDT	Special Marine Warning	BUF		38 min
Jul 13, 4:09 AM EDT	Special Weather Statement	BUF	Jefferson	66 min
Jul 13, 2:22 PM EDT	Special Weather Statement	BUF	Lewis	53 min
Jul 13, 3:19 PM EDT	Special Weather Statement	BUF	Monroe	56 min
Jul 13, 3:46 PM EDT	Special Weather Statement	BUF	Lewis	59 min
Jul 13, 4:12 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	52 min
Jul 13, 4:42 PM EDT	Special Weather Statement	BUF	Genesee	33 min
Jul 13, 5:02 PM EDT	Special Weather Statement	BUF	Ontario	58 min
Jul 13, 5:16 PM EDT	Severe Thunderstorm Warning	BUF	Wyoming	33 min
Jul 13, 5:38 PM EDT	Tornado Warning	BUF	Jefferson, Lewis	22 min
Jul 13, 5:51 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Wyoming	39 min
Jul 13, 6:00 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	35 min
Jul 13, 6:19 PM EDT	Special Weather Statement	BUF	Erie	56 min
Jul 13, 6:20 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	37 min
Jul 13, 6:33 PM EDT	Special Weather Statement	BUF	Jefferson	27 min
Jul 13, 6:35 PM EDT	Special Weather Statement	BUF	Ontario	40 min
Jul 13, 6:40 PM EDT	Special Weather Statement	BUF	Wyoming	50 min
Jul 13, 7:29 PM EDT	Special Weather Statement	BUF	Erie	31 min

Nearby

Severe Thunderstorm Warnings in New York, 2020 Every severe thunderstorm warning in 2020

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.