Alert archive / New York / Special Weather Statements in 2018

Special Weather Statement, NWS Buffalo, NY

August 29, 2018Cattaraugus County, New York

NWS Buffalo, NY issued this special weather statement at Aug 29, 2018, 4:45 PM EDT for Cattaraugus County, New York. It was in force for 45 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 29, 2018, 4:45 PM EDT (20:45 UTC)
Expired
Aug 29, 2018, 5:30 PM EDT
In force
45 min
Issued by
NWS Buffalo, NY

County Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 79 km from the middle of the area, began a volume at 20:46 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, 8.8 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 2018-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 503 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 2018-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 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
503 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1051 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

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 29, 4:42 PM EDT, 3 minutes earlier.

Area forecast discussion, Aug 29, 4:42 PM EDT, 3 minutes before
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Hazardous weather outlook, Aug 29, 12:41 PM EDT, 4 hours 4 minutes before
Hazardous Weather Outlook
National Weather Service Buffalo NY
1241 PM EDT Wed Aug 29 2018

NYZ001-002-010>012-019>021-085-301645-
Niagara-Orleans-Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus-
Allegany-Southern Erie-
1241 PM EDT Wed Aug 29 2018

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

.DAY ONE...This Afternoon and Tonight.

Thunderstorms will develop this afternoon and continue into the
evening hours as a cold front crosses the region. Some of these
storms may be strong to severe, with damaging winds and heavy
rainfall as the main threats.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.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>006-013-014-301645-
Monroe-Wayne-Northern Cayuga-Oswego-Livingston-Ontario-
1241 PM EDT Wed Aug 29 2018

...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

Thunderstorms will develop this afternoon and continue into the
evening hours as a cold front crosses the region. Some of these
storms may be strong to severe, with damaging winds and heavy
rainfall as the main threats.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.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

NYZ008-301645-
Lewis-
1241 PM EDT Wed Aug 29 2018

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

.DAY ONE...This Afternoon and Tonight.

Thunderstorms will develop this afternoon and continue into the
evening hours as a cold front crosses the region. There is a slight
risk for severe storms, capable of producing damaging winds and
heavy rainfall as the main threats.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.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

NYZ007-301645-
Jefferson-
1241 PM EDT Wed Aug 29 2018

...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

Thunderstorms will develop this afternoon and continue into the
evening hours as a cold front crosses the region. There is a slight
risk for severe storms, capable of producing damaging winds and
heavy rainfall as the main threats.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.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>045-062>065-SLZ022-024-301645-
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 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 the Niagara River to Hamlin Beach-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
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-
1241 PM EDT Wed Aug 29 2018

This Hazardous Weather Outlook is for the New York waters of Lake
Erie, Lake Ontario, and the Saint Lawrence River.

.DAY ONE...This Afternoon and Tonight.

Thunderstorms will develop this afternoon and continue into the
evening hours as a cold front crosses the region. Some of these
storms may be strong to severe, with strong winds and locally
higher waves as the main threat.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.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 29, 2:14 PM EDT, 2 hours 31 minutes before
Special Weather Statement
National Weather Service Buffalo NY
214 PM EDT WED AUG 29 2018

NYZ006>008-291915-
Jefferson-Oswego-Lewis-
214 PM EDT WED AUG 29 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN JEFFERSON...
LEWIS AND NORTHEASTERN OSWEGO COUNTIES...

At 213 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Gouverneur to near Selkirk Shores
State Park. Movement was southeast at 25 mph.

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

Locations impacted include...
Watertown, Sandy Island Beach State Park, Fort Drum, Carthage,
Lowville, Pulaski, West Carthage, Adams, Redfield and Herrings.

This includes Interstate 81 between exits 34 and 44.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 4360 7514 4342 7553 4348 7581 4334 7588
      4354 7635 4356 7633 4357 7628 4363 7626
      4429 7561 4410 7517 4363 7511
TIME...MOT...LOC 1813Z 293DEG 23KT 4431 7551 4358 7624

Reynolds
Special weather statement, Aug 29, 3:16 PM EDT, 1 hour 29 minutes before
Special Weather Statement
National Weather Service Buffalo NY
316 PM EDT WED AUG 29 2018

NYZ008-291945-
Lewis-
316 PM EDT WED AUG 29 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN LEWIS
COUNTY...

At 316 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 8 miles southeast of Star Lake to near
Camden. Movement was east at 25 mph.

Winds in excess of 30 mph are possible with these storms.

Locations impacted include...
Highmarket, Lyonsdale, Greig, Port Leyden, Lyons Falls,
Constableville, Turin, West Leyden, Mohawk Hill and Swancott Mill.

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 4342 7553 4347 7574 4394 7515 4361 7511
TIME...MOT...LOC 1916Z 287DEG 21KT 4409 7490 4341 7572

Reynolds
Special weather statement, Aug 29, 4:07 PM EDT, 38 minutes before
Special Weather Statement
National Weather Service Buffalo NY
407 PM EDT WED AUG 29 2018

NYZ013-014-021-292045-
Allegany-Ontario-Livingston-
407 PM EDT WED AUG 29 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN LIVINGSTON...NORTHEAST
ALLEGANY AND SOUTHWESTERN ONTARIO COUNTIES...

At 406 PM EDT, a strong thunderstorm was located 8 miles east of
Portageville, or 9 miles west of Dansville, moving east at 40 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Dansville, Letchworth State Park, Naples, Groveland, Springwater,
Nunda, Ossian, Dalton, Ossian Center and Hunt Hollow.

This includes Interstate 390 between exits 4 and 5.

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

LAT...LON 4261 7799 4276 7743 4260 7736 4258 7737
      4258 7766 4253 7766 4253 7772 4250 7773
      4247 7794
TIME...MOT...LOC 2006Z 253DEG 34KT 4253 7787

Hitchcock
Special weather statement, Aug 29, 4:45 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 1:38 PM EDTSpecial Marine WarningBUF52 min
Aug 29, 1:48 PM EDTSpecial Marine WarningBUF27 min
Aug 29, 2:14 PM EDTSpecial Weather StatementBUFLewis61 min
Aug 29, 3:16 PM EDTSpecial Weather StatementBUFLewis29 min
Aug 29, 4:07 PM EDTSpecial Weather StatementBUFLivingston38 min

Nearby

Special Weather Statements in New York, 2018Every special weather statement in 2018

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.