Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 13, NWS Buffalo, NY

May 27, 20155 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 27, 2015, 7:53 PM EDT for 5 counties in New York. It was in force for 26 min. 2 reports 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 27, 2015, 7:53 PM EDT (23:53 UTC)
Expired
May 27, 2015, 8:19 PM EDT
In force
26 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 80 km from the middle of the area, began a volume at 23:57 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 27, 8:02 PM EDTTSTM WND DMG3 S Churchville, NYNUMEROUS POWERLINES DOWN
May 27, 8:10 PM EDTTSTM WND DMG3 S Chili Center, NYNUMEROUS POWERLINES DOWN

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.9 hours before the alert went out and 77 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, Buffalo Intl Airport, NY at 12:00Z on 2015-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2015-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.19395878Sfc1 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
47 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
866 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
119 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.

593 
WUUS51 KBUF 272353
SVRBUF
NYC037-051-055-069-121-280030-
/O.NEW.KBUF.SV.W.0013.150527T2353Z-150528T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
753 PM EDT WED MAY 27 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK...
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
  SOUTHEASTERN GENESEE COUNTY IN WESTERN NEW YORK...
  NORTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK...
  SOUTHERN MONROE COUNTY IN WESTERN NEW YORK...

* UNTIL 830 PM EDT

* AT 752 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED NEAR CALEDONIA...OR 7 MILES NORTHWEST OF GENESEO...AND
  MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROCHESTER...CHILI...GENESEO...EAST ROCHESTER...FAIRPORT...
  BRIGHTON...HENRIETTA AND PENFIELD.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 390 BETWEEN EXITS 8 AND 12.
 INTERSTATE 90 BETWEEN EXITS 47 AND 44.

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.

&&

LAT...LON 4278 7801 4307 7804 4316 7740 4278 7733
TIME...MOT...LOC 2352Z 255DEG 34KT 4290 7788 

$$

CHURCH
2 follow-up statements
079 
WWUS51 KBUF 280012
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
812 PM EDT WED MAY 27 2015

NYC037-121-280020-
/O.CAN.KBUF.SV.W.0013.000000T0000Z-150528T0030Z/
GENESEE NY-WYOMING NY-
812 PM EDT WED MAY 27 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GENESEE AND
NORTHEASTERN WYOMING COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4285 7788 4309 7791 4316 7740 4281 7734
TIME...MOT...LOC 0010Z 255DEG 34KT 4294 7766 

$$

NYC051-055-069-280030-
/O.CON.KBUF.SV.W.0013.000000T0000Z-150528T0030Z/
ONTARIO NY-LIVINGSTON NY-MONROE NY-
812 PM EDT WED MAY 27 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTHWESTERN ONTARIO...NORTHEASTERN LIVINGSTON AND SOUTHERN
MONROE COUNTIES...

AT 810 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED NEAR SCOTTSVILLE...OR 6 MILES SOUTH OF CHILI MOVING EAST AT 
40 MPH.

LOCATIONS IMPACTED INCLUDE...
ROCHESTER...CHILI...EAST ROCHESTER...FAIRPORT...BRIGHTON...
HENRIETTA...PENFIELD AND AVON.

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.

&&

LAT...LON 4285 7788 4309 7791 4316 7740 4281 7734
TIME...MOT...LOC 0010Z 255DEG 34KT 4294 7766 

$$

CHURCH
682 
WWUS51 KBUF 280019
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
819 PM EDT WED MAY 27 2015

NYC051-055-069-280028-
/O.CAN.KBUF.SV.W.0013.000000T0000Z-150528T0030Z/
ONTARIO NY-LIVINGSTON NY-MONROE NY-
819 PM EDT WED MAY 27 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ONTARIO...
NORTHEASTERN LIVINGSTON AND SOUTHERN MONROE COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. THEREFORE THE WARNING HAS BEEN CANCELLED. HOWEVER GUSTY 
WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4285 7788 4309 7791 4316 7740 4281 7734
TIME...MOT...LOC 0020Z 255DEG 34KT 4310 7767 

$$

CHURCH

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 4:19 AM EDTSmall Craft AdvisoryBUF15 hr
May 27, 6:03 PM EDTSpecial Marine WarningBUF87 min
May 27, 6:19 PM EDTSpecial Weather StatementBUFNiagara41 min
May 27, 7:02 PM EDTSpecial Marine WarningBUF58 min
May 27, 7:35 PM EDTSpecial Weather StatementBUFGenesee, Livingston, Wyoming40 min

Nearby

Severe Thunderstorm Warnings in New York, 2015Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.