Alert archive / New Jersey / Flash Flood Watches in 2018
Flash Flood Watch 1, NWS New York, NY
NWS New York, NY issued this flash flood watch at Apr 15, 2018, 3:15 PM EDT for Orange County, Rockland County, New York; 5 counties in New Jersey. It took effect at Apr 16, 2018, 12:00 AM EDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Apr 15, 2018, 3:15 PM EDT (19:15 UTC)
- In effect from
- Apr 16, 2018, 12:00 AM EDT
- Expired
- Apr 16, 2018, 2:07 PM EDT
- In force
- 14 hr
- Issued by
- NWS New York, NY
- Flood severity
- None
Counties Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Passaic County, NJ, Union County, NJ, Orange County, NY, Rockland County, NY
The radar
The Brookhaven radar (KOKX), 112 km from the middle of the area, began a volume at 19:14 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 12:00Z, 7.3 hours before the alert went out and 112 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 682 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 447 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS New York, NY wrote its last area forecast discussion before this flash flood watch went out at Apr 15, 2:20 PM EDT, 55 minutes earlier.
Area forecast discussion, Apr 15, 2:20 PM EDT, 55 minutes before
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</html>Hazardous weather outlook, Apr 15, 4:06 AM EDT, 11 hours 9 minutes before
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Flash Flood Watches in New Jersey, 2018Flash Flood Watches in New York, 2018Every flash flood watch in 2018
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.