Alert archive / New York / Areal Flood Warnings in 2019

Areal Flood Warning 15, NWS Buffalo, NY

August 21, 2019Erie County, Niagara County, New York

NWS Buffalo, NY issued this areal flood warning at Aug 21, 2019, 7:04 AM EDT for Erie County, Niagara County, New York. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 21, 2019, 7:04 AM EDT (11:04 UTC)
Expired: Aug 21, 2019, 10:00 AM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 2 km from the middle of the area, began a volume at 11:04 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 00:00Z, 11.1 hours before the alert went out and 5 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 331 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1731 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 106 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 areal flood warning 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 areal flood warning went out at Aug 21, 7:03 AM EDT, 1 minute earlier.

Area forecast discussion, Aug 21, 7:03 AM EDT, 1 minute before

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Hazardous weather outlook, Aug 21, 5:58 AM EDT, 1 hour 6 minutes before

Hazardous Weather Outlook
National Weather Service Buffalo NY
558 AM EDT Wed Aug 21 2019

NYZ001>003-010>014-019>021-085-221000-
Niagara-Orleans-Monroe-Northern Erie-Genesee-Wyoming-Livingston-
Ontario-Chautauqua-Cattaraugus-Allegany-Southern Erie-
558 AM EDT Wed Aug 21 2019

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

.DAY ONE...Today and tonight.

Thunderstorms early this morning and again this afternoon may produce
heavy downpours.

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

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

NYZ004>006-221000-
Wayne-Northern Cayuga-Oswego-
558 AM EDT Wed Aug 21 2019

...LAKESHORE FLOOD WARNING IN EFFECT FROM 5 AM TO 5 PM EDT
THURSDAY...

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

.DAY ONE...Today and tonight.

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

   Lakeshore Flood Warning.

Thunderstorms early today, then again this afternoon into early
evening may produce heavy rain and gusty winds.

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

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

   Lakeshore Flood Warning.

.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

NYZ007-008-221000-
Jefferson-Lewis-
558 AM EDT Wed Aug 21 2019

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

.DAY ONE...Today and tonight.

Thunderstorms into early this evening could produce heavy rainfall
and gusty winds.

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

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>045-062>065-SLZ022-024-221000-
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-
558 AM EDT Wed Aug 21 2019

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.

No hazardous weather is expected at this time.

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

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

In the hours before

Local storm report, Aug 21, 4:35 AM EDT, 2 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
435 AM EDT WED AUG 21 2019

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

0423 AM     FLASH FLOOD      3 E TONAWANDA           42.99N  78.82W
08/21/2019                   ERIE               NY   DEPT OF HIGHWAYS

            US ROUTE 62 - NIAGARA FALLS BLVD - CLOSED FROM ALMEDA
            AVE. TO MAPLE RD. BECAUSE OF FLOODING.

&&

EVENT NUMBER BUF1901493

JLA

Local storm report, Aug 21, 5:16 AM EDT, 1 hour 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
516 AM EDT WED AUG 21 2019

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

0430 AM     FLASH FLOOD      2 NNW TONAWANDA         43.01N  78.89W
08/21/2019                   ERIE               NY   TRAINED SPOTTER

            FLOODING AT INTERSECTION OF MORGAN ST. AND KOHLER ST.
            2-3 INCHES OF WATER FLOWING ACROSS YARD.

&&

EVENT NUMBER BUF1901494

JLA

Local storm report, Aug 21, 5:37 AM EDT, 1 hour 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
537 AM EDT WED AUG 21 2019

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

0442 AM     FLASH FLOOD      TONAWANDA               42.99N  78.88W
08/21/2019                   ERIE               NY   DEPT OF HIGHWAYS

            KNOCHE RD. CLOSED IN BOTH DIRECTIONS BETWEEN ELMWOOD
            AVE. AND DELEWARE AVE.

0450 AM     FLASH FLOOD      1 ESE TONAWANDA         42.98N  78.85W
08/21/2019                   ERIE               NY   DEPT OF HIGHWAYS

            ROUTE 324 EAST CLOSED FROM COLVIN BLVD. TO BELMONT AVE.
            BECAUSE OF FLOODING.

0510 AM     FLASH FLOOD      TONAWANDA               42.98N  78.88W
08/21/2019                   ERIE               NY   DEPT OF HIGHWAYS

            ROUTE 324 WEST CLOSED AT MILITARY RD. DUE TO FLOODING.

&&

EVENT NUMBER BUF1901495
EVENT NUMBER BUF1901496
EVENT NUMBER BUF1901497

JLA

Special weather statement, Aug 21, 5:43 AM EDT, 1 hour 21 minutes before

Special Weather Statement
National Weather Service Buffalo NY
543 AM EDT Wed Aug 21 2019

NYZ004>006-211015-
Oswego-Wayne-Northern Cayuga-
543 AM EDT Wed Aug 21 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN WAYNE...CAYUGA
AND SOUTHWESTERN OSWEGO COUNTIES...

At 543 AM EDT, radar indicated strong thunderstorms were located
along a line extending from near Sodus to near Cato. Movement was
northeast at 40 mph.

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

Locations impacted include...
Fulton, Fair Haven Beach State Park, Williamson, Clyde, Sodus,
Weedsport, Cato, Chimney Bluffs State Park, Battle Island State Park,
Volney, Sterling, Rose, Ira, Huron, Conquest, Savannah, Wolcott, Port
Byron, Sodus Point and Hannibal.

This includes Interstate 90 near exit 40.

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.

LAT...LON 4323 7639 4323 7648 4315 7647 4314 7649
      4311 7647 4310 7650 4303 7650 4303 7657
      4316 7724 4333 7708 4331 7697 4334 7691
      4335 7681 4339 7673 4342 7670 4334 7635
TIME...MOT...LOC 0943Z 217DEG 37KT 4323 7710 4313 7664

JLA

Local storm report, Aug 21, 6:02 AM EDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
602 AM EDT WED AUG 21 2019

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

0530 AM     HEAVY RAIN       KENMORE                 42.96N  78.87W
08/21/2019  M2.51 INCH       ERIE               NY   TRAINED SPOTTER

            FELL WITHIN 60 TO 90 MINUTES.

&&

EVENT NUMBER BUF1901498

JLA

Special weather statement, Aug 21, 6:54 AM EDT, 10 minutes before

Special Weather Statement
National Weather Service Buffalo NY
654 AM EDT Wed Aug 21 2019

NYZ006>008-211200-
Jefferson-Oswego-Lewis-
654 AM EDT Wed Aug 21 2019

...AN AREA OF STRONG THUNDERSTORM WILL AFFECT JEFFERSON...LEWIS AND
NORTHEASTERN OSWEGO COUNTIES...

At 652 AM EDT, an area of strong thunderstorms and heavy rain was
found over Oswego county and eastern Lake Ontario. This activity
will move northeast at 45 mph and produce torrential rainfall for
Jefferson and Lewis counties through 8:30 AM EDT.

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

Locations impacted include...
Watertown, Fort Drum, Sandy Island Beach State Park, Stony Point,
Carthage, Lowville, Pulaski, West Carthage, Clayton, Adams, Dexter,
Redfield, Glen Park, Herrings, Kring Point State Park, Highmarket,
Adams Center, Wellesley Island State Park, Redwood and Barnes
Corners.

This includes Interstate 81 between exits 36 and 52.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. This area of thunderstorms has already generated
over two inches of rain in less than 90 minutes for sites further
upstream. Do not drive your vehicle through flooded roadways.

LAT...LON 4440 7583 4439 7584 4410 7517 4361 7511
      4342 7553 4348 7581 4343 7584 4359 7626
      4378 7629 4383 7636 4387 7635 4384 7645
      4387 7650 4396 7644 4396 7634 4410 7643
      4414 7635 4420 7631 4422 7619 4429 7615
TIME...MOT...LOC 1051Z 230DEG 41KT 4363 7619

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 1:59 AM EDT	Special Weather Statement	BUF	Cattaraugus	31 min
Aug 21, 3:48 AM EDT	Special Weather Statement	BUF	Erie	27 min
Aug 21, 3:56 AM EDT	Flash Flood Warning	BUF	Erie	3 hr
Aug 21, 4:43 AM EDT	Small Craft Advisory	BUF		23 hr
Aug 21, 4:48 AM EDT	Lakeshore Flood Warning	BUF	Cayuga, Oswego, Wayne	23 hr
Aug 21, 5:43 AM EDT	Special Weather Statement	BUF	Wayne	32 min
Aug 21, 5:58 AM EDT	Special Marine Warning	BUF		62 min
Aug 21, 6:28 AM EDT	Severe Thunderstorm Warning	BUF	Oswego	62 min
Aug 21, 6:54 AM EDT	Special Weather Statement	BUF	Jefferson, Lewis	66 min
Aug 21, 6:58 AM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	77 min

Nearby

Areal Flood Warnings in New York, 2019 Every areal flood 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.