Alert archive / New York / Dense Fog Advisories in 2025

Dense Fog Advisory 2, NWS Buffalo, NY

April 19, 2025Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this dense fog advisory at Apr 19, 2025, 1:00 PM EDT for Chautauqua County, Erie County, New York. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Apr 19, 2025, 1:00 PM EDT (17:00 UTC)
Expired
Apr 19, 2025, 8:00 PM EDT
In force
7 hr
Issued by
NWS Buffalo, NY

Counties Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 55 km from the middle of the area, began a volume at 17:04 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, 5.0 hours before the alert went out and 55 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 2025-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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 2025-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 276 square meters per square second.1939587897117Sfc1 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
5 J/kg
Mixed-layer CIN
-146 J/kg
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
276 m²/s²
0-3 km storm-relative helicity
249 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this dense fog advisory 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 dense fog advisory went out at Apr 19, 12:16 PM EDT, 44 minutes earlier.

Area forecast discussion, Apr 19, 12:16 PM EDT, 44 minutes before
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Hazardous weather outlook, Apr 19, 3:53 AM EDT, 9 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service Buffalo NY
353 AM EDT Sat Apr 19 2025

NYZ001>008-010>014-019>021-085-200930-
Niagara-Orleans-Monroe-Wayne-Northern Cayuga-Oswego-Jefferson-Lewis-
Northern Erie-Genesee-Wyoming-Livingston-Ontario-Chautauqua-
Cattaraugus-Allegany-Southern Erie-
353 AM EDT Sat Apr 19 2025

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

.DAY ONE...Today and tonight.

A cold front will cross the area today, producing a few rounds of
showers and widely scattered thunderstorms. There is a Marginal Risk
that a few isolated storms may produce localized strong wind gusts
and hail.

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

No hazardous weather is 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>045-062>065-SLZ022-024-200930-
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-
353 AM EDT Sat Apr 19 2025

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

.DAY ONE...Today and tonight.

A cold front will cross the area today, producing a few rounds of
showers and widely scattered thunderstorms. There is a Marginal Risk
that a few isolated storms may produce localized strong wind gusts
and hail.

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

No hazardous weather is 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

Hitchcock

In the hours before

Special weather statement, Apr 19, 8:02 AM EDT, 4 hours 58 minutes before
Special Weather Statement
National Weather Service Buffalo NY
802 AM EDT Sat Apr 19 2025

NYZ010-191500-
Northern Erie-
Including the city of Buffalo
802 AM EDT Sat Apr 19 2025

...AREAS OF DENSE FOG IN THE BUFFALO AREA THIS MORNING...

There will be locally dense fog in the Buffalo metro area this
morning, especially downtown near Lake Erie. Motorists should be
prepared for poor visibility below a half mile when traveling this
morning. The fog will linger near the lakeshore through this
morning.

Apffel
Local storm report, Apr 19, 11:22 AM EDT, 1 hour 38 minutes before
Preliminary Local Storm Report
National Weather Service Buffalo NY
1122 AM EDT Sat Apr 19 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1100 AM     Non-Tstm Wnd Gst 3 ENE Dunkirk           42.50N 79.28W
04/19/2025  M61 MPH          Chautauqua         NY   ASOS

            ASOS station KDKK Dunkirk Airport.

&&
Local storm report, Apr 19, 11:31 AM EDT, 1 hour 29 minutes before
Preliminary Local Storm Report
National Weather Service Buffalo NY
1131 AM EDT Sat Apr 19 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1056 AM     Marine Tstm Wind 2 NW Dunkirk            42.49N 79.35W
04/19/2025  M58 MPH          LEZ041             NY   C-Man Station

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 3:51 AM EDTSmall Craft AdvisoryBUF30 hr
Apr 19, 5:39 AM EDTSpecial Marine WarningBUF77 min
Apr 19, 8:33 AM EDTSpecial Marine WarningBUF57 min
Apr 19, 10:15 AM EDTSpecial Marine WarningBUF80 min
Apr 19, 11:07 AM EDTSevere Thunderstorm WarningBUFChautauqua, Erie, Genesee, Wyoming38 min
Apr 19, 11:45 AM EDTSevere Thunderstorm WarningBUFErie, Genesee, Livingston, Wyoming30 min
Apr 19, 12:05 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Ontario40 min

Nearby

Dense Fog Advisories in New York, 2025Every dense fog advisory in 2025

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.