Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 7, NWS Albany, NY

July 9, 2021Dutchess County, New York; Northwest Hills Planning Region, Connecticut

NWS Albany, NY issued this flash flood warning at Jul 9, 2021, 8:08 AM EDT for Dutchess County, New York; Northwest Hills Planning Region, Connecticut. It was in force for 4 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 9, 2021, 8:08 AM EDT (12:08 UTC)
Expired
Jul 9, 2021, 12:19 PM EDT
In force
4 hr
Issued by
NWS Albany, NY
Area
Storm-based polygon
Flood severity
None

Counties Northwest Hills Planning Region, CT, Dutchess County, NY

The radar

The Brookhaven radar (KOKX), 100 km from the middle of the area, began a volume at 12:10 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

Albany, NY (KALY), launched 12:00Z, 0.1 hours before the alert went out and 119 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, Albany, NY at 12:00Z on 2021-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2021-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.193958Sfc1 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
3 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
764 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

413 
WGUS51 KALY 091208
FFWALY
CTC005-NYC027-091800-
/O.NEW.KALY.FF.W.0007.210709T1208Z-210709T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Albany NY
808 AM EDT Fri Jul 9 2021

The National Weather Service in Albany has issued a

* Flash Flood Warning for...
  Litchfield County in northern Connecticut...
  Southeastern Dutchess County in east central New York...

* Until 200 PM EDT.

* At 808 AM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 0.5 and 1 inch of rain has fallen this 
  morning on top of up to 2 to 3 inches of rainfall over the past 
  day. Additional rainfall amounts of 1 to 3 inches are possible 
  over the next few hours 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...
  Torrington, New Milford, Pawling, Thomaston, New Hartford, Amenia, 
  Kent, Sharon, Norfolk, Millbrook, Litchfield, New Preston, 
  Cornwall Bridge, Gaylordsville, Falls Village, Dover Plains, 
  Woodbury Center, Wingdale, Northwest Harwinton and Oakville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4150 7382 4176 7372 4195 7349 4204 7302
      4204 7301 4197 7303 4197 7289 4189 7294
      4181 7295 4180 7302 4164 7298 4156 7316
      4151 7316 4149 7333 4147 7331 4151 7339
      4149 7344 4165 7349 4167 7352 4153 7353

FLASH FLOOD...RADAR INDICATED

$$

bew
1 follow-up statement
418 
WGUS71 KALY 091619
FFSALY

Flash Flood Statement
National Weather Service Albany NY
1219 PM EDT Fri Jul 9 2021

CTC005-NYC027-091629-
/O.CAN.KALY.FF.W.0007.000000T0000Z-210709T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Litchfield CT-Dutchess NY-
1219 PM EDT Fri Jul 9 2021

...FLASH FLOOD WARNING IS CANCELLED FOR LITCHFIELD AND SOUTHEASTERN 
DUTCHESS COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat.

A Flash Flood Watch remains in effect until 400 PM EDT for portions 
of northwestern Connecticut, western Massachusetts, east central New 
York and southern Vermont.

LAT...LON 4150 7382 4176 7372 4195 7349 4204 7302
      4204 7301 4197 7303 4197 7289 4189 7294
      4181 7295 4180 7302 4164 7298 4156 7316
      4151 7316 4149 7333 4147 7331 4151 7339
      4149 7344 4165 7349 4167 7352 4153 7353

$$

bew

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 8:12 PM EDTAreal Flood AdvisoryALYDutchess, Ulster2 hr
Jul 8, 8:19 PM EDTSpecial Weather StatementALYHamilton41 min
Jul 8, 8:30 PM EDTSpecial Weather StatementALYFulton45 min
Jul 8, 8:31 PM EDTSpecial Weather StatementALYHerkimer44 min
Jul 8, 9:07 PM EDTSpecial Weather StatementALYHamilton38 min
Jul 8, 9:27 PM EDTSpecial Weather StatementALYFulton48 min
Jul 8, 10:26 PM EDTSpecial Weather StatementALYWarren34 min
Jul 8, 11:00 PM EDTAreal Flood AdvisoryALYFulton, Hamilton, Saratoga, Warren, Washington98 min
Jul 9, 3:52 AM EDTSpecial Weather StatementALYUlster38 min
Jul 9, 4:28 AM EDTAreal Flood AdvisoryALYColumbia, Greene, Ulster2 hr
Jul 9, 2:56 PM EDTSpecial Weather StatementALYSaratoga34 min
Jul 9, 3:31 PM EDTSpecial Weather StatementALYSaratoga29 min
Jul 9, 3:53 PM EDTSpecial Weather StatementALYWashington37 min
Jul 9, 4:01 PM EDTSpecial Weather StatementALYSchenectady29 min
Jul 9, 6:10 PM EDTSpecial Weather StatementALYColumbia50 min
Jul 9, 6:13 PM EDTSpecial Weather StatementALYDutchess32 min
Jul 9, 6:39 PM EDTSpecial Weather StatementALYGreene51 min
Jul 9, 6:50 PM EDTSpecial Weather StatementALYDutchess40 min
Jul 9, 7:12 PM EDTSevere Thunderstorm WarningALYDutchess27 min
Jul 9, 7:17 PM EDTSpecial Weather StatementALYColumbia28 min
Jul 9, 7:23 PM EDTSpecial Weather StatementALYColumbia37 min
Jul 9, 7:30 PM EDTAreal Flood AdvisoryALYColumbia, Greene, Ulster3 hr
Jul 9, 7:55 PM EDTSpecial Weather StatementALYColumbia35 min

Nearby

Flash Flood Warnings in New York, 2021Flash Flood Warnings in Connecticut, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.