Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 37, NWS New York, NY

September 1, 2021Orange County, New York

NWS New York, NY issued this flash flood warning at Sep 1, 2021, 3:34 PM EDT for Orange County, New York. It was in force for 8 hr. 3 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
Sep 1, 2021, 3:34 PM EDT (19:34 UTC)
Expired
Sep 2, 2021, 12:00 AM EDT
In force
8 hr
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

County Orange County, NY

The radar

The Albany radar (KENX), 124 km from the middle of the area, began a volume at 19:34 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

TimeReportWhereRemark
Sep 1, 6:14 PM EDTFLASH FLOOD4 Ese Port Jervis, NYHARDSCRABBLE ROAD HAS BEEN CLOSED DUE TO FLOODING.
Sep 1, 8:30 PM EDTFLASH FLOOD2 Sse Washingtonville, NYMOUNTAIN LODGE ROAD CLOSED DUE TO FLOODING.
Sep 1, 9:47 PM EDTFLASH FLOOD1 Se Goshen, NYFLOODING ON NY 17M BOTH DIRECTIONS BETWEEN SOUTH STREET AND DUCK FARM ROAD. ALL LANES CLOSED.

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 12:00Z, 7.6 hours before the alert went out and 134 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, Brookhaven, NY at 12:00Z on 2021-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 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, Brookhaven, NY at 12:00Z on 2021-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.19395878Sfc1 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
51 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
1274 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

774 
WGUS51 KOKX 011934
FFWOKX
NYC071-012130-
/O.NEW.KOKX.FF.W.0037.210901T1934Z-210901T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
334 PM EDT Wed Sep 1 2021

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Orange County in southeastern New York...

* Until 530 PM EDT.

* At 334 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 1 and 2 inches of rain have fallen. 
  Additional rainfall amounts of 1 to 2 inches are possible in the 
  warned area. Flash flooding is expected to begin shortly.

  HAZARD...Flash flooding caused by heavy rain.

  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...
  Newburgh, Middletown, Port Jervis, Monroe, Walden, West Point, 
  Warwick, Goshen, Howells, New Windsor, Gardnertown, Chester, 
  Montgomery, Greenwood Lake, Florida, Harriman, Cuddebackville, 
  Otisville, Huguenot and Unionville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4115 7424 4136 7469 4143 7475 4149 7476
      4151 7448 4157 7442 4163 7426 4161 7425
      4158 7413 4161 7413 4161 7407 4158 7405
      4159 7395 4152 7400 4146 7400 4139 7395
      4133 7397

FLASH FLOOD...RADAR INDICATED

$$

Fig
5 follow-up statements
717 
WGUS51 KOKX 012115
FFWOKX
NYC071-012300-
/O.EXT.KOKX.FF.W.0037.000000T0000Z-210901T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
515 PM EDT Wed Sep 1 2021

The National Weather Service in Upton has extended the

* Flash Flood Warning for...
  Orange County in southeastern New York...

* Until 700 PM EDT.

* At 515 PM EDT, Doppler radar indicated an area of heavy rain 
  moving across the warned area. Between 1 and 2.5 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is expected to begin 
  shortly.

  HAZARD...Flash flooding caused by heavy rain.

  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...
  Newburgh, Middletown, Port Jervis, Monroe, Walden, West Point, 
  Warwick, Goshen, Howells, New Windsor, Gardnertown, Chester, 
  Montgomery, Greenwood Lake, Florida, Harriman, Cuddebackville, 
  Otisville, Huguenot and Unionville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4115 7424 4136 7469 4143 7475 4149 7476
      4151 7448 4157 7442 4163 7426 4161 7425
      4158 7413 4161 7413 4161 7407 4158 7405
      4159 7395 4152 7400 4146 7400 4139 7395
      4133 7397

FLASH FLOOD...RADAR INDICATED

$$

Fig
111 
WGUS51 KOKX 012254
FFWOKX
NYC071-020100-
/O.EXT.KOKX.FF.W.0037.000000T0000Z-210902T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
654 PM EDT Wed Sep 1 2021

The National Weather Service in Upton has extended the

* Flash Flood Warning for...
  Orange County in southeastern New York...

* Until 900 PM EDT.

* At 654 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 1 and 2.5 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 heavy rain.

  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...
  Newburgh, Middletown, Port Jervis, Monroe, Walden, West Point, 
  Warwick, Goshen, Howells, New Windsor, Gardnertown, Chester, 
  Montgomery, Greenwood Lake, Florida, Harriman, Cuddebackville, 
  Otisville, Huguenot and Unionville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4115 7424 4136 7469 4143 7475 4149 7476
      4151 7448 4157 7442 4163 7426 4161 7425
      4158 7413 4161 7413 4161 7407 4158 7405
      4159 7395 4152 7400 4146 7400 4139 7395
      4133 7397

FLASH FLOOD...RADAR INDICATED

$$

Fig
859 
WGUS51 KOKX 020043
FFWOKX
NYC071-020300-
/O.EXT.KOKX.FF.W.0037.000000T0000Z-210902T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
843 PM EDT Wed Sep 1 2021

The National Weather Service in Upton has extended the

* Flash Flood Warning for...
  Orange County in southeastern New York...

* Until 1100 PM EDT.

* At 843 PM EDT, Doppler radar indicated 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.

  HAZARD...Flash flooding caused by heavy rain.

  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...
  Newburgh, Middletown, Port Jervis, Monroe, Walden, West Point, 
  Warwick, Goshen, Howells, New Windsor, Gardnertown, Chester, 
  Montgomery, Greenwood Lake, Florida, Harriman, Cuddebackville, 
  Otisville, Huguenot and Unionville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4115 7424 4136 7469 4143 7475 4149 7476
      4151 7448 4157 7442 4163 7426 4161 7425
      4158 7413 4161 7413 4161 7407 4158 7405
      4159 7395 4152 7400 4146 7400 4139 7395
      4133 7397

FLASH FLOOD...RADAR INDICATED

$$

Fig
775 
WGUS51 KOKX 020235
FFWOKX
NYC071-020400-
/O.EXT.KOKX.FF.W.0037.000000T0000Z-210902T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
1035 PM EDT Wed Sep 1 2021

The National Weather Service in Upton has extended the

* Flash Flood Warning for...
  Orange County in southeastern New York...

* Until midnight EDT.

* At 1035 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 3 and 4.5 inches of rain have fallen. 
  Additional rainfall amounts of 1 to 2 inches are possible in the 
  warned area. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by heavy rain.

  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...
  Newburgh, Middletown, Port Jervis, Monroe, Walden, West Point, 
  Warwick, Goshen, Howells, New Windsor, Gardnertown, Chester, 
  Montgomery, Greenwood Lake, Florida, Harriman, Cuddebackville, 
  Otisville, Huguenot and Unionville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4115 7424 4136 7469 4143 7475 4149 7476
      4151 7448 4157 7442 4163 7426 4161 7425
      4158 7413 4161 7413 4161 7407 4158 7405
      4159 7395 4152 7400 4146 7400 4139 7395
      4133 7397

FLASH FLOOD...RADAR INDICATED

$$

Fig
334 
WGUS71 KOKX 020358
FFSOKX

Flash Flood Statement
National Weather Service New York NY
1158 PM EDT Wed Sep 1 2021

NYC071-020408-
/O.EXP.KOKX.FF.W.0037.000000T0000Z-210902T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orange NY-
1158 PM EDT Wed Sep 1 2021

...FLASH FLOOD WARNING WILL EXPIRE AT MIDNIGHT EDT TONIGHT FOR 
ORANGE COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 200 PM EDT Thursday for 
portions of southern Connecticut, northeast New Jersey and southeast 
New York.

LAT...LON 4115 7424 4136 7469 4143 7475 4149 7476
      4151 7448 4157 7442 4163 7426 4161 7425
      4158 7413 4161 7413 4161 7407 4158 7405
      4159 7395 4152 7400 4146 7400 4139 7395
      4133 7397

$$

Fig

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 4:05 AM EDTGale WarningOKX31 hr
Sep 1, 5:24 AM EDTCoastal Flood AdvisoryOKXSuffolk17 hr
Sep 1, 9:36 AM EDTSpecial Marine WarningOKX54 min
Sep 1, 10:18 AM EDTSpecial Marine WarningOKX87 min
Sep 1, 10:30 AM EDTSpecial Marine WarningOKX60 min
Sep 1, 11:45 AM EDTSpecial Marine WarningOKX90 min
Sep 1, 1:15 PM EDTSpecial Marine WarningOKX90 min
Sep 1, 1:40 PM EDTAreal Flood AdvisoryOKXOrange, Putnam114 min
Sep 1, 2:43 PM EDTSpecial Marine WarningOKX62 min
Sep 1, 4:43 PM EDTRiver Flood WarningOKXOrange, Rockland43 hr
Sep 1, 5:54 PM EDTFlash Flood Warning EmergencyOKXRichmond6 hr
Sep 1, 6:51 PM EDTFlash Flood WarningOKXBronx, Kings, Nassau, New York, Putnam, Queens and 3 more5 hr

Nearby

Flash Flood Warnings in New York, 2021Every 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.