Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 15, NWS Albany, NY

July 17, 2021Dutchess County, New York

NWS Albany, NY issued this flash flood warning at Jul 17, 2021, 8:12 PM EDT for Dutchess County, New York. It was in force for 3 hr. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 17, 2021, 8:12 PM EDT (00:12 UTC)
Expired: Jul 17, 2021, 11:15 PM EDT
In force: 3 hr
Issued by: NWS Albany, NY
Area: Storm-based polygon
Flood severity: None

County Dutchess County, NY

The radar

The Albany radar (KENX), 112 km from the middle of the area, began a volume at 00:11 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.

What was reported inside it

Time	Report	Where	Remark
Jul 17, 8:31 PM EDT	FLASH FLOOD	3 Ne Lagrange, NY	FLOODED ROAD NEAR THE INTERSECTION OF BARMORE RD AND MEADOWS RIDGE LANE IN LAGRANGE, NY.
Jul 17, 9:12 PM EDT	HEAVY RAIN 2.19	Dover Plains, NY	2.00 IN LESS THAN 1 HOUR.
Jul 17, 11:05 PM EDT	HEAVY RAIN 1.59	2 Ne Beacon, NY	24-HR RAINFALL TOTAL
Jul 17, 11:05 PM EDT	HEAVY RAIN 2.69	2 N Dover Plains, NY	24-HR RAINFALL TOTAL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.2 hours before the alert went out and 116 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: 1431 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

528 
WGUS51 KALY 180012
FFWALY
NYC027-180315-
/O.NEW.KALY.FF.W.0015.210718T0012Z-210718T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Albany NY
812 PM EDT Sat Jul 17 2021

The National Weather Service in Albany has issued a

* Flash Flood Warning for...
  Southern Dutchess County in east central New York...

* Until 1115 PM EDT.

* At 812 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Poughkeepsie, Beacon, Pawling, Pleasant Valley, Wappingers Falls, 
  Fishkill, Millbrook, Hopewell Junction, Red Oaks Mill, Myers 
  Corner, Fairview, Wingdale, Dover Plains, East Fishkill, Beekman, 
  Lagrangeville, Arthursburg, Sylvan Lake, Billings and Hillside 
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4176 7393 4179 7353 4153 7355 4149 7393
      4144 7398 4145 7400 4150 7400 4158 7395

FLASH FLOOD...RADAR INDICATED

$$

NAS

2 follow-up statements

278 
WGUS71 KALY 180226
FFSALY

Flash Flood Statement
National Weather Service Albany NY
1026 PM EDT Sat Jul 17 2021

NYC027-180315-
/O.CON.KALY.FF.W.0015.000000T0000Z-210718T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dutchess NY-
1026 PM EDT Sat Jul 17 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT THIS 
EVENING FOR SOUTHERN DUTCHESS COUNTY...

At 1026 PM EDT, local law enforcement reported flooding in the 
Pleasant Valley area around Cole Road. Between 3 and 5 inches of 
rain have fallen. Flash flooding is already occurring. The heavy 
rain has moved out and periods of light to moderate rain are 
expected through the rest of the night.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Poughkeepsie, Beacon, Pawling, Pleasant Valley, Wappingers Falls, 
  Fishkill, Millbrook, Hopewell Junction, Red Oaks Mill, Myers 
  Corner, Fairview, Wingdale, Dover Plains, East Fishkill, Beekman, 
  Lagrangeville, Arthursburg, Sylvan Lake, Billings and Hillside 
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4176 7393 4179 7353 4153 7355 4149 7393
      4144 7398 4145 7400 4150 7400 4158 7395

FLASH FLOOD...OBSERVED

$$

NAS

489 
WGUS71 KALY 180314
FFSALY

Flash Flood Statement
National Weather Service Albany NY
1114 PM EDT Sat Jul 17 2021

NYC027-180324-
/O.EXP.KALY.FF.W.0015.000000T0000Z-210718T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dutchess NY-
1114 PM EDT Sat Jul 17 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1115 PM EDT THIS EVENING FOR 
SOUTHERN DUTCHESS COUNTY...

The heavy rain has ended. Only minor urban and small stream flooding 
is expected the rest of the night. Please continue to heed remaining 
road closures.

A Flash Flood Watch remains in effect until 1200 PM EDT Sunday for 
portions of northwestern Connecticut, western Massachusetts, New 
York and southern Vermont.

LAT...LON 4176 7393 4179 7353 4153 7355 4149 7393
      4144 7398 4145 7400 4150 7400 4158 7395

$$

NAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 8:04 PM EDT	Special Weather Statement	ALY	Dutchess	26 min
Jul 17, 8:32 PM EDT	Special Weather Statement	ALY	Dutchess	28 min
Jul 17, 8:40 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess	65 min
Jul 17, 8:48 PM EDT	Special Weather Statement	ALY	Ulster	27 min
Jul 17, 8:57 PM EDT	Areal Flood Advisory	ALY	Columbia	3 hr
Jul 17, 9:23 PM EDT	Areal Flood Advisory	ALY	Rensselaer	3 hr
Jul 17, 10:03 PM EDT	Areal Flood Advisory	ALY	Columbia, Dutchess	117 min
Jul 17, 10:35 PM EDT	Areal Flood Advisory	ALY	Albany, Rensselaer, Saratoga, Schenectady	115 min
Jul 17, 11:18 PM EDT	Areal Flood Advisory	ALY	Dutchess	117 min
Jul 18, 5:29 AM EDT	Areal Flood Advisory	ALY	Herkimer	96 min
Jul 18, 3:59 PM EDT	Areal Flood Advisory	ALY	Columbia	3 hr
Jul 18, 4:06 PM EDT	Areal Flood Advisory	ALY	Greene, Schoharie	6 hr
Jul 18, 4:49 PM EDT	Flash Flood Warning	ALY	Columbia	3 hr
Jul 18, 5:27 PM EDT	Areal Flood Advisory	ALY	Columbia	3 hr

Nearby

Flash Flood Warnings in New York, 2021 Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.