Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 14, NWS Buffalo, NY

May 30, 2015Jefferson County, Lewis County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 30, 2015, 4:27 PM EDT for Jefferson County, Lewis County, New York. It was in force for 63 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 30, 2015, 4:27 PM EDT (20:27 UTC)
Expired: May 30, 2015, 5:30 PM EDT
In force: 63 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Jefferson County, NY, Lewis County, NY

The radar

The Ft Drum radar (KTYX), 9 km from the middle of the area, began a volume at 20:29 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 nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.5 hours before the alert went out and 188 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: 1150 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

730 
WUUS51 KBUF 302027
SVRBUF
NYC045-049-302130-
/O.NEW.KBUF.SV.W.0014.150530T2027Z-150530T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
427 PM EDT SAT MAY 30 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL LEWIS COUNTY IN CENTRAL NEW YORK...
  SOUTH CENTRAL JEFFERSON COUNTY IN CENTRAL NEW YORK...

* UNTIL 530 PM EDT

* AT 425 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED 8 MILES SOUTHEAST OF BARNES CORNERS...OR 20 MILES 
  SOUTHEAST OF WATERTOWN...AND MOVING NORTHEAST AT 35 MPH. HAIL UP 
  TO A HALF INCH IN DIAMETER MAY ALSO ACCOMPANY THE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  LOWVILLE...DENMARK...NEW BREMEN...WATSON...CROGHAN...HARRISBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

IN ADDITION TO HALF INCH HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD 
TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. 
REMEMBER... IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

&&

LAT...LON 4363 7572 4367 7577 4369 7577 4369 7580
      4373 7585 4414 7528 4410 7517 4391 7515
TIME...MOT...LOC 2025Z 229DEG 31KT 4371 7573 

$$

MITCHELL

2 follow-up statements

547 
WWUS51 KBUF 302107
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
507 PM EDT SAT MAY 30 2015

NYC045-302115-
/O.CAN.KBUF.SV.W.0014.000000T0000Z-150530T2130Z/
JEFFERSON NY-
507 PM EDT SAT MAY 30 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL JEFFERSON COUNTY
IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED. HOWEVER 
THE WARNING REMAINS IN EFFECT FOR NORTHEASTERN LEWIS COUNTY.

LAT...LON 4382 7533 4397 7550 4414 7528 4410 7517
      4391 7515
TIME...MOT...LOC 2105Z 229DEG 31KT 4394 7537 

$$

NYC049-302130-
/O.CON.KBUF.SV.W.0014.000000T0000Z-150530T2130Z/
LEWIS NY-
507 PM EDT SAT MAY 30 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHEASTERN LEWIS COUNTY...

AT 505 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED 11 MILES NORTHEAST OF LOWVILLE...OR 21 MILES EAST OF FORT 
DRUM...MOVING NORTHEAST AT 35 MPH. UP TO HALF INCH HAIL MAY ALSO 
ACCOMPANY THE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
CROGHAN...INDIAN RIVER...KIRSCHNERVILLE...SOFT MAPLE RESERVOIR AND
BELFORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE. THIS IS A VERY
DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS.

IN ADDITION TO HALF INCH HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD 
TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.  MOVE INDOORS 
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. 
REMEMBER... IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

&&

LAT...LON 4382 7533 4397 7550 4414 7528 4410 7517
      4391 7515
TIME...MOT...LOC 2105Z 229DEG 31KT 4394 7537 

$$

MITCHELL

064 
WWUS51 KBUF 302132
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
532 PM EDT SAT MAY 30 2015

NYC049-302141-
/O.EXP.KBUF.SV.W.0014.000000T0000Z-150530T2130Z/
LEWIS NY-
532 PM EDT SAT MAY 30 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LEWIS COUNTY HAS
EXPIRED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4382 7533 4397 7550 4414 7528 4410 7517
      4391 7515
TIME...MOT...LOC 2131Z 229DEG 31KT 4394 7537 

$$

MITCHELL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 10:20 PM EDT	Small Craft Advisory	BUF		22 hr
May 30, 4:42 AM EDT	Small Craft Advisory	BUF		54 hr
May 30, 4:15 PM EDT	Special Weather Statement	BUF	Lewis	45 min
May 30, 4:16 PM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Livingston, Ontario	89 min
May 30, 5:04 PM EDT	Special Weather Statement	BUF	Wayne, Wyoming	56 min
May 30, 5:14 PM EDT	Special Marine Warning	BUF		61 min
May 30, 5:16 PM EDT	Special Weather Statement	BUF	Lewis	29 min
May 30, 5:39 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	66 min
May 30, 5:47 PM EDT	Flash Flood Warning	BUF	Genesee, Livingston, Wyoming	3 hr
May 30, 7:50 PM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Chautauqua	85 min

Nearby

Severe Thunderstorm Warnings in New York, 2015 Every severe thunderstorm warning in 2015

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.