Alert archive / New York / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 8, NWS Buffalo, NY

May 4, 2018Jefferson County, Lewis County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 4, 2018, 5:32 PM EDT for Jefferson County, Lewis County, New York. It was in force for 58 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: May 4, 2018, 5:32 PM EDT (21:32 UTC)
Expired: May 4, 2018, 6:30 PM EDT
In force: 58 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Jefferson County, NY, Lewis County, NY

The radar

The Ft Drum radar (KTYX), 16 km from the middle of the area, began a volume at 21:34 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
May 4, 5:45 PM EDT	TSTM WND GST 64	1 Ne Belleville, NY

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
May 4, 2:44 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.5 hours before the alert went out and 207 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.

078 
WUUS51 KBUF 042132
SVRBUF
NYC045-049-042230-
/O.NEW.KBUF.SV.W.0008.180504T2132Z-180504T2230Z/

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

The National Weather Service in Buffalo has issued a

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

* Until 630 PM EDT.

* At 531 PM EDT, a severe thunderstorm was located near Sandy Island
  Beach State Park, moving northeast at 70 mph.

  HAZARD...70 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings. 

* Locations impacted include...
  Watertown, Fort Drum, Stony Point, Carthage, West Carthage, Adams,
  Glen Park and Herrings.

This includes Interstate 81 between exits 40 and 47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4375 7566 4381 7576 4367 7626 4378 7629
      4383 7636 4384 7636 4422 7545 4410 7517
      4394 7515
TIME...MOT...LOC 2131Z 238DEG 61KT 4368 7619 

HAIL...<.75IN
WIND...70MPH
 
$$

Church

3 follow-up statements

206 
WWUS51 KBUF 042202
SVSBUF

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

NYC045-049-042230-
/O.CON.KBUF.SV.W.0008.000000T0000Z-180504T2230Z/
Jefferson NY-Lewis NY-
602 PM EDT FRI MAY 4 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR EAST CENTRAL JEFFERSON AND NORTHERN LEWIS COUNTIES...

At 602 PM EDT, a severe thunderstorm was located over Carthage, or 12
miles southeast of Fort Drum, moving northeast at 70 mph.

HAZARD...70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

Locations impacted include...
Watertown, Fort Drum, Carthage, West Carthage, Glen Park, Herrings,
Denmark and New Bremen.

This includes Interstate 81 between exits 45 and 47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4380 7579 4386 7584 4400 7598 4422 7545
      4410 7517 4394 7515 4375 7566 4381 7576
TIME...MOT...LOC 2202Z 238DEG 61KT 4396 7557 

HAIL...<.75IN
WIND...70MPH
 
$$

Church

358 
WWUS51 KBUF 042218
SVSBUF

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

NYC045-049-042230-
/O.CON.KBUF.SV.W.0008.000000T0000Z-180504T2230Z/
Jefferson NY-Lewis NY-
618 PM EDT FRI MAY 4 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHEASTERN JEFFERSON AND NORTHEASTERN LEWIS COUNTIES...

At 617 PM EDT, a severe thunderstorm was located 11 miles west of
Star Lake, or 26 miles east of Fort Drum, moving northeast at 70 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
New Bremen, Harrisville, Croghan, Castorland, Belfort, Lake
Bonaparte, Kirschnerville and Beaver Falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4400 7549 4408 7548 4418 7555 4422 7545
      4410 7517 4394 7515 4375 7566
TIME...MOT...LOC 2217Z 238DEG 61KT 4410 7525 

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

Church

112 
WWUS51 KBUF 042225
SVSBUF

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

NYC045-049-042235-
/O.EXP.KBUF.SV.W.0008.000000T0000Z-180504T2230Z/
Jefferson NY-Lewis NY-
625 PM EDT FRI MAY 4 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON AND
NORTHEASTERN LEWIS COUNTIES WILL EXPIRE AT 630 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for 
southern and central Lewis County.

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

LAT...LON 4400 7549 4408 7548 4418 7555 4422 7545
      4410 7517 4394 7515 4375 7566
TIME...MOT...LOC 2225Z 238DEG 61KT 4416 7511 

$$

Church

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, 4:05 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	40 min
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, 5:44 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.