Flash Flood Warning 21, NWS New York, NY

Issued

Aug 15, 2012, 11:16 AM EDT (15:16 UTC)

Expired

Aug 15, 2012, 12:45 PM EDT

In force

89 min

Issued by

NWS New York, NY

Area

Storm-based polygon

Flood severity

None

County Nassau County, NY

The Brookhaven radar (KOKX), 66 km from the middle of the area, began a volume at 15:16 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.

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

926 
WGUS51 KOKX 151516
FFWOKX
NYC059-151645-
/O.NEW.KOKX.FF.W.0021.120815T1516Z-120815T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1116 AM EDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NASSAU COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 1245 PM EDT...

* AT 1111 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
A THUNDERSTORM MOVING NORTH ACROSS THE WARNING AREA. RAINFALL RATES 
OF ONE TO ONE AN HALF INCHES IN ONE HOUR ARE POSSIBLE. EXCESSIVE 
RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND 
STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL 
AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

&&

LAT...LON 4058 7373 4073 7372 4074 7370 4075 7370
      4076 7372 4087 7371 4087 7368 4085 7366
      4088 7366 4090 7364 4092 7352 4087 7346
      4070 7343

$$

233 
WGUS71 KOKX 151553
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1153 AM EDT WED AUG 15 2012

NYC059-151645-
/O.CON.KOKX.FF.W.0021.000000T0000Z-120815T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NASSAU NY-
1153 AM EDT WED AUG 15 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT FOR
NASSAU COUNTY...

AT 1146 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED 
AREA. RAINFALL RATES OF UP TO TWO INCHES IN ONE HOUR ARE POSSIBLE. 
FLASH FLOODING WAS REPORTED ACROSS MEADOWBROOK PARKWAY AND OLD 
COUNTRY ROAD. UP TO TWO FEET OF STANDING WATER HAS BEEN REPORTED 
ACROSS AREAS FROM GARDEN CITY...MINEOLA...CARLE PLACE...WESTBURY 
CORRIDOR. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING 
OF URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER 
DRAINAGE AREAS AND LOW LYING SPOTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

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.

&&

LAT...LON 4058 7373 4073 7372 4074 7370 4075 7370
      4076 7372 4087 7371 4087 7368 4085 7366
      4088 7366 4090 7364 4092 7352 4087 7346
      4070 7343

$$
FIG

503 
WGUS71 KOKX 151647
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1247 PM EDT WED AUG 15 2012

NYC059-151656-
/O.EXP.KOKX.FF.W.0021.000000T0000Z-120815T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NASSAU NY-
1247 PM EDT WED AUG 15 2012

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NASSAU COUNTY...

THE HEAVY THUNDERSTORMS THAT PRODUCE UP TO TWO INCHES OF RAINFALL IN 
ONE HOUR HAVE MOVED OUTSIDE OF THE WARNING AREA...THEREFORE WILL 
ALLOW THE WARNING TO EXPIRE. PLEASE CONTINUE TO EXERCISE CAUTION 
WHEN DRIVING SINCE PONDING ON ROADWAYS MAY STILL EXIST.

LAT...LON 4058 7373 4073 7372 4074 7370 4075 7370
      4076 7372 4087 7371 4087 7368 4085 7366
      4088 7366 4090 7364 4092 7352 4087 7346
      4070 7343

$$

Flash Flood Warnings in New York, 2012Every flash flood warning in 2012

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.