Alert archive / New York / Special Weather Statements in 2019

Special Weather Statement, NWS Buffalo, NY

August 17, 2019Chautauqua County, New York

NWS Buffalo, NY issued this special weather statement at Aug 17, 2019, 10:40 AM EDT for Chautauqua County, New York. It was in force for 35 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, 10:40 AM EDT (14:40 UTC)
Expired
Aug 17, 2019, 11:15 AM EDT
In force
35 min
Issued by
NWS Buffalo, NY

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 84 km from the middle of the area, began a volume at 14:42 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, 2.7 hours before the alert went out and 85 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°0°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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Buffalo, NY wrote its last area forecast discussion before this special weather statement went out at Aug 17, 7:00 AM EDT, 3 hours 40 minutes earlier.

Area forecast discussion, Aug 17, 7:00 AM EDT, 3 hours 40 minutes before
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Hazardous weather outlook, Aug 17, 8:29 AM EDT, 2 hours 11 minutes before
Hazardous Weather Outlook
National Weather Service Buffalo NY
829 AM EDT Sat Aug 17 2019

NYZ001-002-010-011-181230-
Niagara-Orleans-Northern Erie-Genesee-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of western New York.

.DAY ONE...Today and tonight.

Thunderstorms are likely today. The storms could become quite strong
during the midday and early afternoon with the greatest threat from
the storms being localized damaging winds and hail.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Strong to severe thunderstorms will again be possible on Sunday with
the risk for another round of localized damaging winds and hail.

Afternoon apparent temperatures Sunday through Tuesday may reach the
lower 90s or higher. Keep in mind that heat advisories are issued
when apparent temperatures reach at least 95 for two consecutive
hours.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ012-019>021-085-181230-
Wyoming-Chautauqua-Cattaraugus-Allegany-Southern Erie-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of western New York.

.DAY ONE...Today and tonight.

Thunderstorms are likely today. Some storms could become strong to
severe with damaging winds and hail possible through the afternoon
and early evening hours.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Strong to severe thunderstorms will again be possible on Sunday with
the risk for another round of localized damaging winds and hail.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ003-004-181230-
Monroe-Wayne-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of western New York.

.DAY ONE...Today and tonight.

Thunderstorms are likely today. Some storms could become strong to
severe with damaging winds and hail possible between 1 PM and 6 PM.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Strong to severe thunderstorms will again be possible on Sunday with
the risk for another round of localized damaging winds and hail.

Afternoon apparent temperatures Sunday through Tuesday may reach the
lower 90s or higher. Keep in mind that heat advisories are issued
when apparent temperatures reach at least 95 for two consecutive
hours.

Behind a strong cold front Wednesday night, west to northwest winds
and waves will increase with possible lakeshore flooding due to high
lake levels.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ013-014-181230-
Livingston-Ontario-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of western New York.

.DAY ONE...Today and tonight.

Thunderstorms are likely today. Some storms could become strong to
severe with damaging winds and hail possible between 1 PM and 6 PM.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ005-006-181230-
Northern Cayuga-Oswego-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of central New York.

.DAY ONE...Today and tonight.

Thunderstorms are likely today. Some storms could become strong to
severe with damaging winds and hail possible between 2 PM and 8 PM.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Strong to severe thunderstorms will again be possible on Sunday with
the risk for another round of localized damaging winds and hail.

Afternoon apparent temperatures Sunday through Tuesday may reach the
lower 90s or higher. Keep in mind that heat advisories are issued
when apparent temperatures reach at least 95 for two consecutive
hours.

Behind a strong cold front Wednesday night, west to northwest winds
and waves will increase with possible lakeshore flooding due to high
lake levels.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ007-008-181230-
Jefferson-Lewis-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of central New York.

.DAY ONE...Today and tonight.

Thunderstorms are likely today. Some storms could become strong to
severe with damaging winds and hail possible between 3 PM and 8 PM.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

LEZ020-040-041-LOZ030-042-043-062-063-181230-
Upper Niagara River and Buffalo Harbor-
Lake Erie nearshore waters from Ripley to Dunkirk-
Lake Erie nearshore waters from Dunkirk to Buffalo-
Lower Niagara River-
Lake Ontario nearshore waters from the Niagara River to Hamlin Beach-
Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of Lake Erie and Lake
Ontario.

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

LOZ044-045-064-065-SLZ022-024-181230-
Lake Ontario nearshore waters from Sodus Bay to Mexico Bay-
Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence
River-Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence River-
Saint Lawrence River from Cape Vincent to Ogdensburg-
Saint Lawrence River from Ogdensburg to Saint Regis-
829 AM EDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of Lake Ontario and
Saint Lawrence River.

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

In the hours before

Special weather statement, Aug 17, 7:30 AM EDT, 3 hours 10 minutes before
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Special weather statement, Aug 17, 7:39 AM EDT, 3 hours 1 minute before
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Special weather statement, Aug 17, 10:16 AM EDT, 24 minutes before
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Special weather statement, Aug 17, 10:40 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service Buffalo NY
1040 AM EDT Sat Aug 17 2019

NYZ019-171515-
Chautauqua-
1040 AM EDT Sat Aug 17 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN CHAUTAUQUA
COUNTY...

At 1040 AM EDT, radar indicated strong thunderstorms were located
along a line extending from near Lake Erie State Park to 6 miles
southwest of Mayville. Movement was northeast at 50 mph.

Winds in excess of 40 mph are possible with these storms.

Locations impacted include...
Dunkirk, Fredonia, Mayville, Long Point State Park, Chautauqua
Institute, SUNY Fredonia, Chautauqua, Sheridan, Stockton, Gerry,
Ellington, Brocton, Arkwright, Sherman, Forestville, Cassadaga,
Sinclairville, Cherry Creek, Bemus Point and Hamlet.

This includes the following highways...
 Interstate 90 between exits 59 and 58.
 Interstate 86 between exits 6 and 7.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4215 7971 4244 7940 4256 7909 4255 7908
      4216 7908
TIME...MOT...LOC 1440Z 239DEG 49KT 4240 7939 4220 7961

RSH

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, 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
Aug 17, 4:19 PM EDTSevere Thunderstorm WarningBUFNiagara, Orleans41 min

Nearby

Special Weather Statements in New York, 2019Every special weather statement 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.