Alert archive / New York / Flash Flood Warnings in 2015
Flash Flood Warning 13, NWS New York, NY
NWS New York, NY issued this flash flood warning at Aug 18, 2015, 5:02 AM EDT for New York County, New York. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2015, 5:02 AM EDT (09:02 UTC)
- Expired
- Aug 18, 2015, 6:00 AM EDT
- In force
- 58 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
County New York County, NY
The radar
The Philadelphia radar (KDIX), 95 km from the middle of the area, began a volume at 09:03 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
Brookhaven, NY (KOKX), launched 00:00Z, 9.0 hours before the alert went out and 95 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.
- Mixed-layer CAPE
- 600 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1375 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
728
WGUS51 KOKX 180902
FFWOKX
NYC061-181000-
/O.NEW.KOKX.FF.W.0013.150818T0902Z-150818T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
502 AM EDT TUE AUG 18 2015
THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NEW YORK COUNTY IN SOUTHEASTERN NEW YORK...
* UNTIL 600 AM EDT
* AT 501 AM EDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
WARNED AREA...MOVING VERY SLOWLY. AN INCH TO AN INCH AND A HALF OF
RAIN IS EXPECTED TO FALL WITHIN AN HOUR. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4071 7400 4072 7403 4076 7401 4077 7400
4078 7395 4076 7395 4074 7396 4072 7396
4071 7397 4070 7399
$$
JC2 follow-up statements
399
WGUS71 KOKX 180937
FFSOKX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
537 AM EDT TUE AUG 18 2015
NYC061-181000-
/O.CON.KOKX.FF.W.0013.000000T0000Z-150818T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW YORK NY-
537 AM EDT TUE AUG 18 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 AM EDT FOR NEW
YORK COUNTY...
AT 533 AM EDT...THE HEAVIEST RAINFALL HAS SHIFTED WEST OUT OF
MANHATTAN...HOWEVER RAINFALL IS STILL EXPECTED OVER PARTS OF THE
WARNED AREA THROUGH 600 AM EDT WITH AN ADDITIONAL TENTH TO A QUARTER
INCH OF RAIN POSSIBLE. UP TO AN ESTIMATED 1.25 INCHES OF RAINFALL
HAS ALREADY FALLEN ACROSS PARTS OF LOWER MANHATTAN.
FLASH FLOODING IS EXPECTED FOR SOME AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4071 7400 4072 7403 4076 7401 4077 7400
4078 7395 4076 7395 4074 7396 4072 7396
4071 7397 4070 7399
$$
JC497
WGUS71 KOKX 180952
FFSOKX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
552 AM EDT TUE AUG 18 2015
NYC061-181001-
/O.EXP.KOKX.FF.W.0013.000000T0000Z-150818T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW YORK NY-
552 AM EDT TUE AUG 18 2015
...THE FLASH FLOOD WARNING FOR NEW YORK COUNTY WILL EXPIRE AT 600 AM
EDT...
THE HEAVY RAIN IS COMING TO AN END...AND NO ADDITIONAL FLASH
FLOODING IS EXPECTED. AS A RESULT...THE FLASH FLOOD WARNING FOR
SOUTHERN MANHATTAN WILL BE ALLOWED TO EXPIRE AT 6 AM.
LAT...LON 4071 7400 4072 7403 4076 7401 4077 7400
4078 7395 4076 7395 4074 7396 4072 7396
4071 7397 4070 7399
$$
MALOITThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 4:42 AM EDT | Areal Flood Advisory | OKX | Bronx, Kings, New York, Queens | 63 min |
| Aug 18, 1:53 PM EDT | Areal Flood Advisory | OKX | Orange | 2 hr |
| Aug 18, 2:37 PM EDT | Special Weather Statement | OKX | Orange | 23 min |
| Aug 18, 2:46 PM EDT | Flash Flood Warning | OKX | Orange | 3 hr |
| Aug 18, 3:09 PM EDT | Special Weather Statement | OKX | Orange | 36 min |
| Aug 18, 3:27 PM EDT | Marine Dense Fog Advisory | OKX | 13 hr |
Nearby
Flash Flood Warnings in New York, 2015Every flash flood warning in 2015
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.