Alert archive / New York / Areal Flood Warnings in 2021

Areal Flood Warning 5, NWS Buffalo, NY

July 16, 2021Chautauqua County, New York

NWS Buffalo, NY issued this areal flood warning at Jul 16, 2021, 7:14 PM EDT for Chautauqua County, New York. It was in force for 6 hr. 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 16, 2021, 7:14 PM EDT (23:14 UTC)
Expired: Jul 17, 2021, 1:00 AM EDT
In force: 6 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 101 km from the middle of the area, began a volume at 23:14 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, 11.2 hours before the alert went out and 101 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1011 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

910 
WGUS41 KBUF 162314
FLWBUF

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Buffalo NY
714 PM EDT Fri Jul 16 2021

NYC013-170500-
/O.NEW.KBUF.FA.W.0005.210716T2314Z-210717T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
714 PM EDT Fri Jul 16 2021

The National Weather Service in Buffalo has issued a

* Flood Warning for...
  Southeastern Chautauqua County in western New York...

* Until 100 AM EDT.

* At 714 PM EDT, local law enforcement reported continued flooding 
  in the warned area from the 2 to 4 inches of rain that fell 
  earlier this afternoon.

* Some locations that will experience flooding include...
  Jamestown, Lakewood, Falconer, Jamestown West, Long Point State 
  Park, Frewsburg, Chautauqua Institution, Chautauqua, Busti, Gerry, 
  Ellington, Celoron, Sherman, Panama, Bemus Point, Ellery Center, 
  Ashville, Stow, Stedman Corners and Niobe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4200 7956 4201 7957 4211 7957 4217 7959
      4220 7954 4221 7949 4225 7938 4225 7926
      4226 7921 4226 7916 4228 7911 4228 7907
      4200 7907

$$

JJR

1 follow-up statement

648 
WGUS81 KBUF 170457
FLSBUF

Flood Statement
National Weather Service Buffalo NY
1257 AM EDT Sat Jul 17 2021

NYC013-170507-
/O.EXP.KBUF.FA.W.0005.000000T0000Z-210717T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chautauqua NY-
1257 AM EDT Sat Jul 17 2021

...FLOOD WARNING WILL EXPIRE AT 1 AM EDT EARLY THIS MORNING FOR 
SOUTHEASTERN CHAUTAUQUA COUNTY...

Flood waters have receded. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4200 7956 4201 7957 4211 7957 4217 7959
      4220 7954 4221 7949 4225 7938 4225 7926
      4226 7921 4226 7916 4228 7911 4228 7907
      4200 7907

$$

Apffel

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 8:06 PM EDT	Special Weather Statement	BUF	Erie	24 min
Jul 15, 8:12 PM EDT	Special Weather Statement	BUF	Chautauqua	63 min
Jul 15, 8:18 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	57 min
Jul 15, 9:21 PM EDT	Special Weather Statement	BUF	Cattaraugus	54 min
Jul 15, 10:48 PM EDT	Special Marine Warning	BUF		57 min
Jul 15, 11:09 PM EDT	Special Weather Statement	BUF	Jefferson	36 min
Jul 16, 2:13 PM EDT	Flash Flood Warning	BUF	Chautauqua	5 hr
Jul 16, 2:41 PM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 8 more	32 hr
Jul 16, 2:59 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua	4 hr
Jul 16, 4:45 PM EDT	Small Craft Advisory	BUF		44 hr
Jul 16, 4:49 PM EDT	Areal Flood Warning	BUF	Chautauqua	6 hr

Nearby

Areal Flood Warnings in New York, 2021 Every areal flood warning in 2021

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.