Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 36, NWS Albany, NY

September 15, 20214 counties in New York

NWS Albany, NY issued this flash flood warning at Sep 15, 2021, 2:48 PM EDT for 4 counties in 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 outline as issued.

The facts

Issued: Sep 15, 2021, 2:48 PM EDT (18:48 UTC)
Expired: Sep 15, 2021, 5:30 PM EDT
In force: 3 hr
Issued by: NWS Albany, NY
Area: Storm-based polygon
Flood severity: None

Counties Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Washington County, NY

The radar

The Albany radar (KENX), 56 km from the middle of the area, began a volume at 18:47 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, 6.8 hours before the alert went out and 35 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: 856 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.3

Open this sounding in Storm Lab

The text

As transmitted.

798 
WGUS51 KALY 151848
FFWALY
NYC083-091-093-115-152130-
/O.NEW.KALY.FF.W.0036.210915T1848Z-210915T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Albany NY
248 PM EDT Wed Sep 15 2021

The National Weather Service in Albany has issued a

* Flash Flood Warning for...
  Northwestern Rensselaer County in east central New York...
  Southeastern Saratoga County in east central New York...
  Eastern Schenectady County in east central New York...
  Southern Washington County in east central New York...

* Until 530 PM EDT.

* At 248 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 4 inches of rain 
  have fallen. The expected rainfall rate is 2 inches in 1 hour. 
  Additional rainfall amounts up to 3 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...
  Schenectady, Clifton Park, Rotterdam, Scotia, Mechanicville, 
  Salem, Niskayuna, Cambridge, Greenwich, Round Lake, Country 
  Knolls, Burnt Hills, Alplaus, East Glenville, Halfmoon, Lee, 
  Easton, Stillwater, Schaghticoke and Valley Falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4294 7380 4304 7359 4305 7357 4310 7347
      4317 7336 4318 7333 4319 7327 4293 7332
      4284 7367 4282 7372 4282 7373 4282 7374
      4276 7394 4290 7400

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2 INCHES IN 1 HOUR

$$

ATE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 7:02 AM EDT	Special Weather Statement	ALY	Hamilton, Herkimer	58 min
Sep 15, 12:19 PM EDT	Special Weather Statement	ALY	Saratoga	26 min
Sep 15, 12:31 PM EDT	Severe Thunderstorm Warning	ALY	Montgomery, Schenectady, Schoharie	59 min
Sep 15, 12:47 PM EDT	Special Weather Statement	ALY	Saratoga, Washington	28 min
Sep 15, 12:54 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Montgomery, Saratoga, Schenectady	51 min
Sep 15, 1:05 PM EDT	Special Weather Statement	ALY	Washington	25 min
Sep 15, 1:18 PM EDT	Severe Thunderstorm Warning	ALY	Saratoga, Washington	57 min
Sep 15, 1:21 PM EDT	Flash Flood Warning	ALY	Fulton, Montgomery	3 hr
Sep 15, 1:28 PM EDT	Areal Flood Advisory	ALY	Fulton, Montgomery, Saratoga, Schenectady	9 min
Sep 15, 1:32 PM EDT	Areal Flood Advisory	ALY	Saratoga, Washington	16 min
Sep 15, 1:37 PM EDT	Flash Flood Warning	ALY	Fulton, Montgomery, Saratoga, Schenectady	3 hr
Sep 15, 1:45 PM EDT	Areal Flood Advisory	ALY	Washington	2 hr
Sep 15, 1:46 PM EDT	Severe Thunderstorm Warning	ALY	Saratoga, Washington	44 min
Sep 15, 1:48 PM EDT	Flash Flood Warning	ALY	Saratoga, Washington	3 hr
Sep 15, 1:52 PM EDT	Areal Flood Advisory	ALY	Washington	3 hr
Sep 15, 1:55 PM EDT	Areal Flood Advisory	ALY	Montgomery, Schenectady, Schoharie	3 hr
Sep 15, 2:13 PM EDT	Special Weather Statement	ALY	Schenectady	32 min
Sep 15, 2:15 PM EDT	Severe Thunderstorm Warning	ALY	Washington	60 min
Sep 15, 2:22 PM EDT	Areal Flood Advisory	ALY	Rensselaer, Saratoga, Schenectady, Washington	26 min
Sep 15, 2:26 PM EDT	Special Weather Statement	ALY	Schoharie	34 min
Sep 15, 2:28 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer, Saratoga, Washington	62 min
Sep 15, 2:35 PM EDT	Special Weather Statement	ALY	Rensselaer	25 min
Sep 15, 2:56 PM EDT	Special Weather Statement	ALY	Rensselaer	49 min
Sep 15, 2:59 PM EDT	Areal Flood Advisory	ALY	Albany, Rensselaer	3 hr
Sep 15, 2:59 PM EDT	Special Weather Statement	ALY	Albany	31 min
Sep 15, 3:00 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer	60 min
Sep 15, 3:03 PM EDT	Areal Flood Advisory	ALY	Washington	3 hr
Sep 15, 3:19 PM EDT	Special Weather Statement	ALY	Ulster	26 min
Sep 15, 3:29 PM EDT	Special Weather Statement	ALY	Rensselaer	31 min
Sep 15, 3:33 PM EDT	Special Weather Statement	ALY	Greene	27 min
Sep 15, 3:39 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Columbia, Greene, Rensselaer	66 min
Sep 15, 3:48 PM EDT	Areal Flood Advisory	ALY	Albany, Columbia, Greene, Rensselaer	3 hr
Sep 15, 3:50 PM EDT	Special Weather Statement	ALY	Ulster	25 min
Sep 15, 4:02 PM EDT	Areal Flood Advisory	ALY	Columbia, Rensselaer	3 hr
Sep 15, 4:19 PM EDT	Special Weather Statement	ALY	Columbia	26 min
Sep 15, 4:31 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Greene, Rensselaer	59 min
Sep 15, 4:41 PM EDT	Areal Flood Advisory	ALY	Columbia, Greene, Rensselaer	3 hr
Sep 15, 4:51 PM EDT	Areal Flood Advisory	ALY	Greene, Ulster	3 hr
Sep 15, 5:00 PM EDT	Special Weather Statement	ALY	Greene	30 min
Sep 15, 5:13 PM EDT	Special Weather Statement	ALY	Ulster	32 min
Sep 15, 5:16 PM EDT	Areal Flood Warning	ALY	Fulton, Hamilton, Montgomery, Saratoga, Schenectady, Schoharie and 2 more	3 hr
Sep 15, 5:26 PM EDT	Flash Flood Warning	ALY	Ulster	2 hr
Sep 15, 5:30 PM EDT	Areal Flood Advisory	ALY	Ulster	3 hr
Sep 15, 5:31 PM EDT	Special Weather Statement	ALY	Columbia	29 min
Sep 15, 5:41 PM EDT	Special Weather Statement	ALY	Ulster	34 min
Sep 15, 5:48 PM EDT	Flash Flood Warning	ALY	Columbia, Greene	97 min
Sep 15, 5:55 PM EDT	Special Weather Statement	ALY	Greene	35 min
Sep 15, 6:08 PM EDT	Special Weather Statement	ALY	Columbia	37 min
Sep 15, 6:32 PM EDT	Special Weather Statement	ALY	Dutchess	43 min
Sep 15, 7:39 PM EDT	Special Weather Statement	ALY	Ulster	36 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.