Alert archive / New York / Flash Flood Warnings in 2011

Flash Flood Warning 40, NWS Albany, NY

September 5, 2011Greene County, Schoharie County, New York

NWS Albany, NY issued this flash flood warning at Sep 5, 2011, 12:32 AM EDT for Greene 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 5, 2011, 12:32 AM EDT (04:32 UTC)
Expired
Sep 5, 2011, 6:30 AM EDT
In force
6 hr
Issued by
NWS Albany, NY
Area
Storm-based polygon
Flood severity
None

Counties Greene County, NY, Schoharie County, NY

The radar

The Albany radar (KENX), 36 km from the middle of the area, began a volume at 04:32 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, 4.5 hours before the alert went out and 53 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 00:00Z on 2011-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 311 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 00:00Z on 2011-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
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.

409 
WGUS51 KALY 050432
FFWALY
NYC039-095-051030-
/O.NEW.KALY.FF.W.0040.110905T0432Z-110905T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ALBANY NY
1232 AM EDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GREENE COUNTY IN EAST CENTRAL NEW YORK...
  THIS INCLUDES THE CITIES OF...HUNTER...CATSKILL...
  SOUTHEASTERN SCHOHARIE COUNTY IN EAST CENTRAL NEW YORK...

* UNTIL 630 AM EDT

* AT 1222 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  NUMEROUS SHOWERS AND THUNDERSTORMS WITH EXTREMELY HEAVY RAIN       
  MOVING ACROSS GREENE AND EXTREME SOUTHEASTERN SCHOHARIE COUNTY.    
  SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED TO CONTINUE 
  FOR MUCH OF THE NIGHT RESULTING IN FLASH FLOODING OF CREEKS AND    
  STREAMS AS WELL AS UNDERPASSES...AND POORLY DRAINED LOW LYING      
  AREAS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEW
  BALTIMORE...WINDHAM...PRATTSVILLE...COXSACKIE AND ATHENS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 4 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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 4220 7454 4236 7444 4238 7438 4236 7432
      4239 7425 4241 7426 4246 7377 4238 7380
      4228 7379 4224 7385 4213 7391 4218 7400
      4217 7404 4210 7408 4212 7431

$$
1 follow-up statement
498 
WGUS71 KALY 051032
FFSALY

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

NYC039-095-051042-
/O.EXP.KALY.FF.W.0040.000000T0000Z-110905T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SCHOHARIE NY-GREENE NY-
632 AM EDT MON SEP 5 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR GREENE AND SOUTHEASTERN
SCHOHARIE 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 4220 7454 4236 7444 4238 7438 4236 7432
      4239 7425 4241 7426 4246 7377 4238 7380
      4228 7379 4224 7385 4213 7391 4218 7400
      4217 7404 4210 7408 4212 7431

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 8:12 PM EDTFlash Flood WarningALYWashington4 hr
Sep 4, 8:40 PM EDTSpecial Weather StatementALYRensselaer35 min
Sep 4, 11:22 PM EDTSpecial Weather StatementALYColumbia38 min
Sep 4, 11:41 PM EDTFlash Flood WarningALYMontgomery, Schenectady, Schoharie6 hr
Sep 4, 11:58 PM EDTSpecial Weather StatementALYSchoharie32 min
Sep 5, 12:15 AM EDTSpecial Weather StatementALYColumbia30 min
Sep 5, 1:09 AM EDTSpecial Weather StatementALYRensselaer51 min
Sep 5, 2:02 AM EDTSpecial Weather StatementALYColumbia, Greene43 min
Sep 5, 2:19 AM EDTFlash Flood WarningALYRensselaer, Washington6 hr
Sep 5, 2:45 AM EDTSpecial Weather StatementALYRensselaer45 min

Nearby

Flash Flood Warnings in New York, 2011Every 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.