Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 3, NWS Buffalo, NY

May 4, 2018Jefferson County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 4, 2018, 4:05 PM EDT for Jefferson County, New York. It was in force for 40 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: May 4, 2018, 4:05 PM EDT (20:05 UTC)
Expired: May 4, 2018, 4:45 PM EDT
In force: 40 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), 55 km from the middle of the area, began a volume at 20:08 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
May 4, 2:44 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.1 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 812 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

944 
WUUS51 KBUF 042005
SVRBUF
NYC045-042045-
/O.NEW.KBUF.SV.W.0003.180504T2005Z-180504T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
405 PM EDT FRI MAY 4 2018

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northeastern Jefferson County in central New York...
0.
* Until 445 PM EDT.

* At 403 PM EDT, a severe thunderstorm was located near Clayton, or
  14 miles northwest of Watertown, moving east at 60 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...
  Fort Drum, Redwood, and Philadelphia.

This includes Interstate 81 between exits 49 and 51.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4435 7574 4422 7545 4410 7554 4405 7622
      4420 7621 4439 7584
TIME...MOT...LOC 2003Z 249DEG 54KT 4415 7606 

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

Zaff

2 follow-up statements

714 
WWUS51 KBUF 042021
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
421 PM EDT FRI MAY 4 2018

NYC045-042045-
/O.CON.KBUF.SV.W.0003.000000T0000Z-180504T2045Z/
Jefferson NY-
421 PM EDT FRI MAY 4 2018

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

At 420 PM EDT, a severe thunderstorm was located near Redwood, or 12
miles north of Fort Drum, moving east at 60 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...
Fort Drum, Redwood, Philadelphia, Theresa, Antwerp, Evans Mills,
Oxbow and Muskellunge Lake.

This includes Interstate 81 near exit 49.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4435 7574 4422 7545 4410 7554 4406 7612
TIME...MOT...LOC 2020Z 248DEG 53KT 4424 7577 

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

Zaff

431 
WWUS51 KBUF 042040
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
440 PM EDT FRI MAY 4 2018

NYC045-042050-
/O.EXP.KBUF.SV.W.0003.000000T0000Z-180504T2045Z/
Jefferson NY-
440 PM EDT FRI MAY 4 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON COUNTY
WILL EXPIRE AT 445 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.  However gusty winds
are still possible with this thunderstorm.

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

LAT...LON 4435 7574 4422 7545 4410 7554 4406 7612
TIME...MOT...LOC 2040Z 249DEG 54KT 4434 7540 

$$

Zaff

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 12:20 AM EDT	Dense Fog Advisory	BUF	Erie, Jefferson, Niagara	5 hr
May 4, 3:58 AM EDT	Wind Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	19 hr
May 4, 4:02 AM EDT	Gale Warning	BUF		16 hr
May 4, 2:18 PM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Wyoming	57 min
May 4, 3:35 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	55 min
May 4, 4:04 PM EDT	High Wind Warning	BUF	Erie, Genesee, Jefferson, Lewis, Niagara, Orleans	7 hr
May 4, 4:10 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans, Wayne	35 min
May 4, 4:27 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	33 min
May 4, 4:46 PM EDT	Special Marine Warning	BUF		59 min
May 4, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	22 min
May 4, 4:59 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Jefferson, Lewis, Oswego	61 min
May 4, 5:32 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	58 min
May 4, 5:44 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	61 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.