Alert archive / New York / Flash Flood Warnings in 2021

Flash Flood Warning 8, NWS Albany, NY

July 11, 2021Schoharie County, New York

NWS Albany, NY issued this flash flood warning at Jul 11, 2021, 10:16 PM EDT for Schoharie County, New York. It was in force for 3 hr. 7 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 11, 2021, 10:16 PM EDT (02:16 UTC)
Expired: Jul 12, 2021, 1:15 AM EDT
In force: 3 hr
Issued by: NWS Albany, NY
Area: Storm-based polygon
Flood severity: None

County Schoharie County, NY

The radar

The Albany radar (KENX), 36 km from the middle of the area, began a volume at 02:15 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 11, 10:33 PM EDT	HEAVY RAIN 1.9	Charlotteville, NY	WEATHERNET6
Jul 11, 11:45 PM EDT	HEAVY RAIN 2.4	Richmondville, NY	WEATHERNET6
Jul 11, 11:58 PM EDT	HEAVY RAIN 3.25	Jefferson, NY	WEATHERNET6
Jul 12, 12:20 AM EDT	FLASH FLOOD	Middleburgh, NY	FLOWING WATER ACROSS MAIN STREET. BASEMENT FLOODING OCCURRING WITHIN THE VILLAGE.
Jul 12, 12:30 AM EDT	FLASH FLOOD	1 Ssw Middleburgh, NY	FLOWING WATER AND DEBRIS ACROSS COUNTY ROUTE 36
Jul 12, 12:39 AM EDT	FLASH FLOOD	Middleburgh, NY	MAIN STREET CLOSED DUE TO FLOODING
Jul 12, 12:58 AM EDT	HEAVY RAIN 2.58	Richmondville, NY	WEATHERNET6

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

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 2.3 hours before the alert went out and 56 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: 845 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -108 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

425 
WGUS51 KALY 120216
FFWALY
NYC095-120515-
/O.NEW.KALY.FF.W.0008.210712T0216Z-210712T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Albany NY
1016 PM EDT Sun Jul 11 2021

The National Weather Service in Albany has issued a

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

* Until 115 AM EDT.

* At 1016 PM EDT, Doppler radar indicated heavy rain across the 
  warned area including Interstate 88. Between 1.50 and 2.50 inches 
  of rain have fallen. 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...
  Cobleskill, Jefferson, Middleburgh, Gilboa, Summit, Schoharie, 
  Richmondville, Breakabeen, North Blenheim, Central Bridge, 
  Livingstonville, Preston-Potter Hollow, Carlisle, Seward, West 
  Fulton, Vintonton, Patria, Fultonham, Watsonville and Greenbush.

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.

&&

LAT...LON 4275 7467 4276 7430 4262 7423 4245 7425
      4236 7447 4242 7462 4252 7471 4263 7463

FLASH FLOOD...RADAR INDICATED

$$

CS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 8:38 PM EDT	Areal Flood Advisory	ALY	Schoharie	3 hr
Jul 11, 9:33 PM EDT	Areal Flood Advisory	ALY	Albany, Montgomery, Rensselaer, Saratoga, Schenectady, Schoharie	3 hr
Jul 11, 11:01 PM EDT	Areal Flood Advisory	ALY	Albany, Rensselaer, Saratoga, Washington	3 hr
Jul 12, 12:40 AM EDT	Areal Flood Advisory	ALY	Albany, Columbia, Greene, Montgomery, Rensselaer, Saratoga and 2 more	4 hr
Jul 12, 1:10 AM EDT	Areal Flood Warning	ALY	Schoharie	4 hr
Jul 12, 3:37 AM EDT	Areal Flood Advisory	ALY	Fulton, Herkimer	3 hr
Jul 12, 5:58 AM EDT	Areal Flood Advisory	ALY	Ulster	2 hr
Jul 12, 7:33 AM EDT	Areal Flood Advisory	ALY	Columbia, Dutchess	2 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.