Alert archive / New York / Flash Flood Warnings in 2017
Flash Flood Warning 21, NWS New York, NY
NWS New York, NY issued this flash flood warning at Oct 24, 2017, 11:12 PM EDT for Suffolk County, New York. It was in force for 63 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
- Oct 24, 2017, 11:12 PM EDT (03:12 UTC)
- Expired
- Oct 25, 2017, 12:15 AM EDT
- In force
- 63 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Suffolk County, NY
The radar
The Brookhaven radar (KOKX), 35 km from the middle of the area, began a volume at 03:17 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, 3.2 hours before the alert went out and 35 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
- 473 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 604 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 290 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.3
The text
As transmitted.
619
WGUS51 KOKX 250312
FFWOKX
NYC103-250415-
/O.NEW.KOKX.FF.W.0021.171025T0312Z-171025T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
1112 PM EDT TUE OCT 24 2017
The National Weather Service in Upton NY has issued a
* Flash Flood Warning for...
Western Suffolk County in southeastern New York...
* Until 1215 AM EDT
* At 1112 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to three inches of rain have
already fallen.
* Some locations that will experience flooding include...
Islip, Deer Park, Lindenhurst, Babylon, Dix Hills, Bay Shore,
Sayville, Captree State Park, Gilgo State Park, Davis Park, West
Islip, Copiague, North Bay Shore, Kings Park and East Islip.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4060 7343 4086 7333 4087 7333 4074 7325
4073 7318 4076 7315 4088 7322 4091 7332
4088 7333 4094 7332 4094 7329 4093 7318
4080 7317 4073 7303 4065 7337 4065 7320
4069 7298 4060 7342
$$
MALOIT1 follow-up statement
831
WGUS71 KOKX 250317
FFSOKX
Flash Flood Statement
National Weather Service New York NY
1117 PM EDT TUE OCT 24 2017
NYC103-250327-
/O.CAN.KOKX.FF.W.0021.000000T0000Z-171025T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Suffolk NY-
1117 PM EDT TUE OCT 24 2017
...THE FLASH FLOOD WARNING FOR WESTERN SUFFOLK COUNTY IS CANCELLED...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 4060 7343 4086 7333 4087 7333 4074 7325
4073 7318 4076 7315 4088 7322 4091 7332
4088 7333 4094 7332 4094 7329 4093 7318
4080 7317 4073 7303 4065 7337 4065 7320
4069 7298 4060 7342
$$
MALOITThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 24, 10:43 PM EDT | Flash Flood Watch | OKX | Suffolk | 6 hr |
| Oct 25, 1:59 AM EDT | Small Craft Advisory | OKX | 62 hr |
Nearby
Flash Flood Warnings in New York, 2017Every flash flood warning in 2017
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.