Alert archive / New York / Flash Flood Warnings in 2011

Flash Flood Warning 39, NWS Albany, NY

September 4, 2011Montgomery County, Schenectady County, Schoharie County, New York

NWS Albany, NY issued this flash flood warning at Sep 4, 2011, 11:41 PM EDT for Montgomery County, Schenectady County, Schoharie County, New York. It was in force for 6 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 4, 2011, 11:41 PM EDT (03:41 UTC)
Expired: Sep 5, 2011, 5:30 AM EDT
In force: 6 hr
Issued by: NWS Albany, NY
Area: Storm-based polygon
Flood severity: None

Counties Montgomery County, NY, Schenectady County, NY, Schoharie County, NY

The radar

The Albany radar (KENX), 29 km from the middle of the area, began a volume at 03:43 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 00:00Z, 3.7 hours before the alert went out and 50 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: 311 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1307 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

879 
WGUS51 KALY 050341
FFWALY
NYC057-093-095-050930-
/O.NEW.KALY.FF.W.0039.110905T0341Z-110905T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ALBANY NY
1141 PM EDT SUN SEP 4 2011

THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN SCHENECTADY COUNTY IN EAST CENTRAL NEW YORK...
  SCHOHARIE COUNTY IN EAST CENTRAL NEW YORK...
  THIS INCLUDES THE CITY OF COBLESKILL...
  SOUTHERN MONTGOMERY COUNTY IN EASTERN NEW YORK...

* UNTIL 530 AM EDT

* AT 1133 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN MOVING    
  TOWARDS THE SCHOHARIE VALLEY AND EASTERN MOHAWK VALLEY. THE SHOWERS
  AND THUNDERSTORMS ARE EXPECTED TO REACH THE SCHOHARIE VALLEY AND   
  EASTERN MOHAWK VALLEY SHORTLY AFTER MIDNIGHT WITH HEAVY RAIN
  CONTINUING FOR MUCH OF THE NIGHT. THE HEAVY RAIN IS EXPECTED
  TO FLOOD CREEKS AND STREAMS AS WELL AS UNDERPASSES...AND POORLY
  DRAINED LOW LYING AREAS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUMMIT...
  SHARON SPRINGS...SCHOHARIE...RICHMONDVILLE...MIDDLEBURGH...
  DELANSON...CENTRAL BRIDGE...BREAKABEEN AND AMES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY EMAIL AT
ALB.STORMREPORT@NOAA.GOV OR ON FACEBOOK AT
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.ALBANY.GOV.

&&

LAT...LON 4263 7463 4278 7467 4283 7464 4284 7469
      4291 7409 4273 7418 4265 7418 4256 7424
      4250 7423 4242 7427 4239 7425 4236 7432
      4238 7438 4236 7444 4242 7461 4252 7471

$$

1 follow-up statement

367 
WGUS71 KALY 050932
FFSALY

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ALBANY NY
532 AM EDT MON SEP 5 2011

NYC057-093-095-050941-
/O.EXP.KALY.FF.W.0039.000000T0000Z-110905T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONTGOMERY NY-SCHOHARIE NY-SCHENECTADY NY-
532 AM EDT MON SEP 5 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR WESTERN SCHENECTADY...
SCHOHARIE AND SOUTHERN MONTGOMERY COUNTIES...

PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY EMAIL AT
ALB.STORMREPORT@NOAA.GOV OR ON FACEBOOK AT
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.ALBANY.GOV

LAT...LON 4263 7463 4278 7467 4283 7464 4284 7469
      4291 7409 4273 7418 4265 7418 4256 7424
      4250 7423 4242 7427 4239 7425 4236 7432
      4238 7438 4236 7444 4242 7461 4252 7471

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 8:12 PM EDT	Flash Flood Warning	ALY	Washington	4 hr
Sep 4, 8:40 PM EDT	Special Weather Statement	ALY	Rensselaer	35 min
Sep 4, 11:22 PM EDT	Special Weather Statement	ALY	Columbia	38 min
Sep 4, 11:58 PM EDT	Special Weather Statement	ALY	Schoharie	32 min
Sep 5, 12:15 AM EDT	Special Weather Statement	ALY	Columbia	30 min
Sep 5, 12:32 AM EDT	Flash Flood Warning	ALY	Greene, Schoharie	6 hr
Sep 5, 1:09 AM EDT	Special Weather Statement	ALY	Rensselaer	51 min
Sep 5, 2:02 AM EDT	Special Weather Statement	ALY	Columbia, Greene	43 min
Sep 5, 2:19 AM EDT	Flash Flood Warning	ALY	Rensselaer, Washington	6 hr
Sep 5, 2:45 AM EDT	Special Weather Statement	ALY	Rensselaer	45 min

Nearby

Flash Flood Warnings in New York, 2011 Every flash flood warning in 2011

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.