Alert archive / New York / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 16, NWS Buffalo, NY

May 21, 2013Lewis County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 21, 2013, 2:13 AM EDT for Lewis County, New York. It was in force for 32 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 21, 2013, 2:13 AM EDT (06:13 UTC)
Expired
May 21, 2013, 2:45 AM EDT
In force
32 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

County Lewis County, NY

The radar

The Ft Drum radar (KTYX), 37 km from the middle of the area, began a volume at 06:13 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
May 21, 2:20 AM EDTTSTM WND DMGLyons Falls, NYTREES DOWN.

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 00:00Z, 6.2 hours before the alert went out and 154 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 00:00Z on 2013-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 165 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2013-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 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
165 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1390 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

289 
WUUS51 KBUF 210613
SVRBUF
NYC049-210645-
/O.NEW.KBUF.SV.W.0016.130521T0613Z-130521T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
213 AM EDT TUE MAY 21 2013

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 245 AM EDT

* AT 210 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  HIGHMARKET...OR 10 MILES NORTHWEST OF BOONVILLE...AND MOVING EAST
  AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  PORT LEYDEN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4360 7512 4349 7536 4348 7553 4365 7554
      4374 7512 4362 7510
TIME...MOT...LOC 0614Z 262DEG 29KT 4358 7539

$$

RSH
2 follow-up statements
826 
WWUS51 KBUF 210631
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
231 AM EDT TUE MAY 21 2013

NYC049-210645-
/O.CON.KBUF.SV.W.0016.000000T0000Z-130521T0645Z/
LEWIS NY-
231 AM EDT TUE MAY 21 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM EDT
FOR SOUTHEASTERN LEWIS COUNTY...

AT 230 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR PORT LEYDEN...OR 9 MILES NORTH OF BOONVILLE...MOVING
EAST AT 35 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  SITES JUST EAST OF PORT LEYDEN AND LYONS FALLS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4360 7512 4349 7537 4368 7536 4374 7512
      4362 7510
TIME...MOT...LOC 0631Z 262DEG 29KT 4361 7524

$$

RSH
020 
WWUS51 KBUF 210646
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
246 AM EDT TUE MAY 21 2013

NYC049-210656-
/O.EXP.KBUF.SV.W.0016.000000T0000Z-130521T0645Z/
LEWIS NY-
246 AM EDT TUE MAY 21 2013

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LEWIS COUNTY HAS
EXPIRED...

AT 246 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4360 7512 4349 7537 4368 7536 4374 7512
      4362 7510
TIME...MOT...LOC 0631Z 262DEG 29KT 4359 7524

$$

RSH

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 10:53 PM EDTSpecial Marine WarningBUF52 min
May 20, 11:02 PM EDTSpecial Weather StatementBUFNiagara43 min
May 21, 12:39 AM EDTSpecial Marine WarningBUF51 min
May 21, 12:50 AM EDTSpecial Marine WarningBUF55 min
May 21, 1:01 AM EDTSpecial Weather StatementBUFOswego59 min
May 21, 1:27 AM EDTSevere Thunderstorm WarningBUFJefferson, Lewis48 min
May 21, 1:40 AM EDTSpecial Marine WarningBUF50 min
May 21, 1:49 AM EDTSevere Thunderstorm WarningBUFJefferson, Lewis41 min
May 21, 1:59 AM EDTSpecial Weather StatementBUFLewis61 min
May 21, 12:32 PM EDTSevere Thunderstorm WarningBUFOntario, Wayne58 min
May 21, 12:34 PM EDTSevere Thunderstorm WarningBUFOntario26 min
May 21, 3:02 PM EDTSevere Thunderstorm WarningBUFCayuga, Wayne58 min
May 21, 3:36 PM EDTSevere Thunderstorm WarningBUFWayne54 min
May 21, 3:57 PM EDTSpecial Weather StatementBUFWyoming33 min
May 21, 3:58 PM EDTSpecial Marine WarningBUF62 min
May 21, 3:58 PM EDTSevere Thunderstorm WarningBUFMonroe47 min
May 21, 4:11 PM EDTSevere Thunderstorm WarningBUFLivingston, Wyoming49 min
May 21, 4:47 PM EDTSpecial Weather StatementBUFOntario28 min
May 21, 4:58 PM EDTSevere Thunderstorm WarningBUFLivingston, Ontario47 min
May 21, 5:05 PM EDTSpecial Marine WarningBUF85 min
May 21, 5:14 PM EDTSpecial Marine WarningBUF61 min
May 21, 5:22 PM EDTSpecial Marine WarningBUF83 min
May 21, 5:34 PM EDTSevere Thunderstorm WarningBUFJefferson56 min
May 21, 5:45 PM EDTSevere Thunderstorm WarningBUFOntario15 min
May 21, 5:48 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego57 min
May 21, 7:14 PM EDTSpecial Weather StatementBUFLewis31 min
May 21, 7:40 PM EDTSpecial Marine WarningBUF35 min

Nearby

Severe Thunderstorm Warnings in New York, 2013Every severe thunderstorm warning in 2013

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.