Alert archive / New York / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 42, NWS Buffalo, NY

August 12, 2016Monroe County, Orleans County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 12, 2016, 2:46 PM EDT for Monroe County, Orleans County, New York. It was in force for 44 min. 3 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
Aug 12, 2016, 2:46 PM EDT (18:46 UTC)
Expired
Aug 12, 2016, 3:30 PM EDT
In force
44 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Monroe County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 85 km from the middle of the area, began a volume at 18:48 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
Aug 12, 2:53 PM EDTTSTM WND DMGClarendon, NYWIRES DOWN ON POWERLINE RD.
Aug 12, 2:55 PM EDTTSTM WND DMGHolley, NYWIRES DOWN.
Aug 12, 2:57 PM EDTTSTM WND DMGClarendon, NYTREE 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, 6.8 hours before the alert went out and 83 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 2016-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 680 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2016-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 168 square meters per square second.193958Sfc1 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
680 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
765 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
168 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

863 
WUUS51 KBUF 121846
SVRBUF
NYC055-073-121930-
/O.NEW.KBUF.SV.W.0042.160812T1846Z-160812T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
246 PM EDT FRI AUG 12 2016

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MONROE COUNTY IN WESTERN NEW YORK...
  EASTERN ORLEANS COUNTY IN WESTERN NEW YORK...

* UNTIL 330 PM EDT

* AT 246 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER HOLLEY...OR
  NEAR ALBION...MOVING EAST AT 55 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  ROCHESTER...GREECE...IRONDEQUOIT...BROCKPORT...ALBION...HILTON...
  BRIGHTON AND GATES-NORTH GATES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4336 7770 4329 7756 4313 7757 4314 7818
      4332 7818 4337 7771
TIME...MOT...LOC 1846Z 269DEG 49KT 4323 7808 

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

RSH
2 follow-up statements
406 
WWUS51 KBUF 121905
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
305 PM EDT FRI AUG 12 2016

NYC073-121915-
/O.CAN.KBUF.SV.W.0042.000000T0000Z-160812T1930Z/
ORLEANS NY-
305 PM EDT FRI AUG 12 2016

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ORLEANS COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

LAT...LON 4329 7756 4313 7757 4314 7799 4333 7798
      4337 7772
TIME...MOT...LOC 1905Z 268DEG 41KT 4324 7780 

$$

NYC055-121930-
/O.CON.KBUF.SV.W.0042.000000T0000Z-160812T1930Z/
MONROE NY-
305 PM EDT FRI AUG 12 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTHWESTERN MONROE COUNTY...

AT 305 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
SPENCERPORT...OR NEAR HILTON...MOVING EAST AT 50 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
ROCHESTER...GREECE...IRONDEQUOIT...BROCKPORT...HILTON...BRIGHTON...
GATES-NORTH GATES AND SPENCERPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
MOVE INDOORS IMMEDIATELY. LIGHTNING IS ONE OF NATURE'S LEADING
KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4329 7756 4313 7757 4314 7799 4333 7798
      4337 7772
TIME...MOT...LOC 1905Z 268DEG 41KT 4324 7780 

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

RSH
480 
WWUS51 KBUF 121927
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
327 PM EDT FRI AUG 12 2016

NYC055-121937-
/O.EXP.KBUF.SV.W.0042.000000T0000Z-160812T1930Z/
MONROE NY-
327 PM EDT FRI AUG 12 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MONROE COUNTY
WILL EXPIRE AT 330 PM EDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND HAS EXITED THE WARNED AREA. THEREFORE...THE WARNING
WILL BE ALLOWED TO EXPIRE.  HOWEVER HEAVY RAIN IS STILL POSSIBLE
WITH ADDITIONAL THUNDERSTORMS THROUGH THIS EVENING.

LAT...LON 4329 7756 4313 7757 4314 7799 4333 7798
      4337 7772
TIME...MOT...LOC 1921Z 269DEG 49KT 4324 7780 

$$

RSH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 1:46 AM EDTSmall Craft AdvisoryBUF18 hr
Aug 12, 4:41 AM EDTFlash Flood WatchBUFJefferson, Lewis, Oswego45 hr
Aug 12, 10:36 AM EDTHeat AdvisoryBUFCayuga, Monroe, Ontario, Wayne7 hr
Aug 12, 12:40 PM EDTSpecial Marine WarningBUF95 min
Aug 12, 1:15 PM EDTSpecial Marine WarningBUF60 min
Aug 12, 1:35 PM EDTSpecial Marine WarningBUF25 min
Aug 12, 1:43 PM EDTSpecial Weather StatementBUFNiagara47 min
Aug 12, 2:12 PM EDTSpecial Weather StatementBUFOswego48 min
Aug 12, 2:22 PM EDTSpecial Marine WarningBUF38 min
Aug 12, 2:31 PM EDTSpecial Weather StatementBUFOrleans44 min
Aug 12, 3:01 PM EDTSpecial Weather StatementBUFAllegany, Cattaraugus59 min
Aug 12, 3:12 PM EDTSpecial Marine WarningBUF63 min
Aug 12, 4:12 PM EDTSpecial Marine WarningBUF48 min
Aug 12, 4:32 PM EDTSpecial Weather StatementBUFCattaraugus58 min

Nearby

Severe Thunderstorm Warnings in New York, 2016Every severe thunderstorm warning in 2016

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.