Alert archive / New York / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 93, NWS Buffalo, NY

August 17, 2019Niagara County, Orleans County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 17, 2019, 4:19 PM EDT for Niagara County, Orleans County, New York. It was in force for 41 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
Aug 17, 2019, 4:19 PM EDT (20:19 UTC)
Expired
Aug 17, 2019, 5:00 PM EDT
In force
41 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Niagara County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 41 km from the middle of the area, began a volume at 20:22 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.3 hours before the alert went out and 43 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 2019-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 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 2019-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
39 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1233 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

970 
WUUS51 KBUF 172019
SVRBUF
NYC063-073-172100-
/O.NEW.KBUF.SV.W.0093.190817T2019Z-190817T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
419 PM EDT Sat Aug 17 2019

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northeastern Niagara County in western New York...
  Northwestern Orleans County in western New York...

* Until 500 PM EDT..

* At 419 PM EDT, a severe thunderstorm was located over Newfane, or
  10 miles north of Lockport, moving southeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Medina, Newfane, Middleport, Ridgeway, Wilson, Lyndonville, Barker,
  Gasport, Olcott and Appleton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4337 7879 4340 7863 4334 7833 4311 7848
      4328 7885
TIME...MOT...LOC 2019Z 295DEG 16KT 4332 7872 

HAIL...1.00IN
WIND...60MPH
 
$$

Mitchell
2 follow-up statements
896 
WWUS51 KBUF 172044
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
444 PM EDT Sat Aug 17 2019

NYC063-073-172100-
/O.CON.KBUF.SV.W.0093.000000T0000Z-190817T2100Z/
Niagara NY-Orleans NY-
444 PM EDT Sat Aug 17 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTHEASTERN NIAGARA AND NORTHWESTERN ORLEANS COUNTIES...

At 444 PM EDT, a severe thunderstorm was located 7 miles northwest of
Middleport, or 9 miles northwest of Medina, moving east at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Medina, Middleport, Ridgeway, Lyndonville, Barker, Appleton and
Gasport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4336 7865 4339 7858 4334 7833 4311 7848
      4329 7867
TIME...MOT...LOC 2044Z 284DEG 17KT 4331 7854 

HAIL...1.00IN
WIND...60MPH
 
$$

Mitchell
877 
WWUS51 KBUF 172101
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
501 PM EDT Sat Aug 17 2019

NYC063-073-172110-
/O.EXP.KBUF.SV.W.0093.000000T0000Z-190817T2100Z/
Niagara NY-Orleans NY-
501 PM EDT Sat Aug 17 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NIAGARA AND
NORTHWESTERN ORLEANS COUNTIES HAS EXPIRED...
                
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 allowed to expire.

LAT...LON 4336 7865 4339 7858 4334 7833 4311 7848
      4329 7867
TIME...MOT...LOC 2100Z 295DEG 16KT 4328 7846 

$$

Mitchell

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 10:14 AM EDTSpecial Marine WarningBUF61 min
Aug 17, 10:16 AM EDTSpecial Weather StatementBUFGenesee44 min
Aug 17, 10:40 AM EDTSpecial Weather StatementBUFChautauqua35 min
Aug 17, 11:04 AM EDTSpecial Weather StatementBUFMonroe56 min
Aug 17, 11:07 AM EDTSpecial Weather StatementBUFCattaraugus, Chautauqua, Erie, Wyoming53 min
Aug 17, 11:58 AM EDTSpecial Weather StatementBUFLivingston, Ontario, Wyoming47 min
Aug 17, 12:37 PM EDTSevere Thunderstorm WarningBUFLivingston, Ontario38 min
Aug 17, 1:16 PM EDTSpecial Weather StatementBUFOntario44 min
Aug 17, 1:31 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego, Wayne40 min
Aug 17, 1:48 PM EDTSpecial Weather StatementBUFWyoming57 min
Aug 17, 2:04 PM EDTSpecial Weather StatementBUFCattaraugus56 min
Aug 17, 2:18 PM EDTSpecial Weather StatementBUFLivingston27 min
Aug 17, 2:22 PM EDTSevere Thunderstorm WarningBUFOswego38 min
Aug 17, 2:48 PM EDTSpecial Weather StatementBUFLivingston42 min
Aug 17, 2:58 PM EDTSpecial Weather StatementBUFCattaraugus47 min
Aug 17, 3:27 PM EDTSpecial Weather StatementBUFAllegany33 min
Aug 17, 3:36 PM EDTSevere Thunderstorm WarningBUFAllegany54 min
Aug 17, 4:06 PM EDTSpecial Marine WarningBUF39 min

Nearby

Severe Thunderstorm Warnings in New York, 2019Every severe thunderstorm warning in 2019

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.