Alert archive / New York / Special Weather Statements in 2018

Special Weather Statement, NWS Buffalo, NY

July 24, 2018Chautauqua County, New York

NWS Buffalo, NY issued this special weather statement at Jul 24, 2018, 6:50 PM EDT for Chautauqua County, New York. It was in force for 55 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
Jul 24, 2018, 6:50 PM EDT (22:50 UTC)
Expired
Jul 24, 2018, 7:45 PM EDT
In force
55 min
Issued by
NWS Buffalo, NY

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 97 km from the middle of the area, began a volume at 22:50 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, 10.8 hours before the alert went out and 97 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 2018-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 207 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 2018-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.1939587897Sfc1 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
207 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.0

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 Jul 24, 5:21 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jul 24, 5:21 PM EDT, 1 hour 29 minutes before
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Hazardous weather outlook, Jul 24, 4:51 AM EDT, 13 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Buffalo NY
451 AM EDT Tue Jul 24 2018

NYZ001-002-010>012-019-020-085-250900-
Niagara-Orleans-Northern Erie-Genesee-Wyoming-Chautauqua-Cattaraugus-
Southern Erie-
451 AM EDT Tue Jul 24 2018

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

.DAY ONE...Today and Tonight.

Showers and thunderstorms late today and tonight could contain
tropical downpours capable of producing localized poor drainage
flooding.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

The threat for torrential downpours will persist into early Wednesday
morning before the coverage of the heavier showers shifts to the
east.

.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>008-013-014-021-250900-
Monroe-Wayne-Northern Cayuga-Oswego-Jefferson-Lewis-Livingston-
Ontario-Allegany-
451 AM EDT Tue Jul 24 2018

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

.DAY ONE...Today and Tonight.

Showers and thunderstorms late today and tonight could contain
tropical downpours capable of producing localized poor drainage
flooding.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

The threat for torrential downpours will persist through the day
Wednesday. While most areas will pick up an inch to an inch and a
half of rain in a 24 to 36 hour period...significantly higher amounts
will be possible where heavy showers and storms train over the same
area. This could result in localized flooding.

.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-LOZ042>045-062>065-SLZ022-024-250900-
Upper Niagara River and Buffalo Harbor-
Lake Erie nearshore waters from Ripley to Dunkirk-
Lake Erie nearshore waters from Dunkirk to Buffalo-
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-
451 AM EDT Tue Jul 24 2018

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

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

RSH

In the hours before

Special weather statement, Jul 24, 2:50 PM EDT, 4 hours before
Special Weather Statement
National Weather Service Buffalo NY
250 PM EDT TUE JUL 24 2018

NYZ006-007-241945-
Jefferson-Oswego-
250 PM EDT TUE JUL 24 2018

...A BAND OF HEAVY SHOWERS WILL CONTINUE TO AFFECT CENTRAL JEFFERSON
AND NORTH CENTRAL OSWEGO COUNTIES...

At 246 PM EDT, a band of heavy showers was located from near Mexico
to near Theresa, moving northeast at 25 mph.

Locations impacted include...
Watertown, Sandy Island Beach State Park, Fort Drum, Pulaski, Adams,
Glen Park, Selkirk Shores State Park, Mexico Point State Park, Adams
Center and Redwood.

This includes Interstate 81 between exits 34 and 48.

Torrential rainfall is occurring with these showers, and may cause
localized flooding and ponding of water on roadways. Motorists
should slow down if they encounter these heavy showers as visibility
will be greatly reduced in heavy rain. Do not drive your vehicle
through flooded roadways.

LAT...LON 4427 7556 4388 7582 4388 7584 4384 7584
      4336 7615 4343 7632 4436 7577
TIME...MOT...LOC 1846Z 205DEG 23KT 4400 7588

Smith
Special weather statement, Jul 24, 6:50 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
Jul 24, 2:50 PM EDTSpecial Weather StatementBUFOswego55 min
Jul 24, 7:08 PM EDTFlash Flood WarningBUFChautauqua4 hr

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.