Alert archive / New York / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 75, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Sep 7, 2012, 4:35 PM EDT for Rockland County, Westchester County, New York; Bergen County, New Jersey. It was in force for 22 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
- Sep 7, 2012, 4:35 PM EDT (20:35 UTC)
- Expired
- Sep 7, 2012, 4:57 PM EDT
- In force
- 22 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
Counties Bergen County, NJ, Rockland County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 84 km from the middle of the area, began a volume at 20:36 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, 8.6 hours before the alert went out and 84 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
- 1099 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1017 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
329
WUUS51 KOKX 072035
SVROKX
NJC003-NYC087-119-072130-
/O.NEW.KOKX.SV.W.0075.120907T2035Z-120907T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
435 PM EDT FRI SEP 7 2012
THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTCHESTER COUNTY IN SOUTHEAST NEW YORK...
EASTERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...
ROCKLAND COUNTY IN SOUTHEAST NEW YORK...
* UNTIL 530 PM EDT...
* AT 432 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM
WAS LOCATED NEAR NORWOOD...OR NEAR TAPPAN...AND MOVING EAST AT 10
MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
TARRYTOWN...DOBBS FERRY...YONKERS...BRONXVILLE...WHITE PLAINS...
SCARSDALE...PORT CHESTER...NEW ROCHELLE AND HARRISON
LAT...LON 4107 7401 4104 7368 4100 7365 4088 7377
4090 7385 4091 7385 4090 7386 4095 7406
TIME...MOT...LOC 2035Z 283DEG 8KT 4098 7395
$$
JMC1 follow-up statement
090
WWUS51 KOKX 072057
SVSOKX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
457 PM EDT FRI SEP 7 2012
NJC003-NYC087-119-072105-
/O.CAN.KOKX.SV.W.0075.000000T0000Z-120907T2130Z/
ROCKLAND NY-BERGEN NJ-WESTCHESTER NY-
457 PM EDT FRI SEP 7 2012
...THE SEVERE THUNDERSTORM WARNING FOR WESTCHESTER...EAST CENTRAL
BERGEN AND ROCKLAND COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED. THE WARNING HAS
THEREFORE BEEN CANCELLED.
LAT...LON 4107 7401 4104 7368 4100 7365 4088 7377
4090 7385 4091 7385 4090 7386 4095 7406
TIME...MOT...LOC 2055Z 283DEG 8KT 4097 7389
$$
JMCThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 4:15 PM EDT | Small Craft Advisory | OKX | 4 days | |
| Sep 7, 4:43 PM EDT | Special Marine Warning | OKX | 32 min | |
| Sep 7, 4:53 PM EDT | Special Weather Statement | OKX | Westchester | 52 min |
| Sep 7, 4:59 PM EDT | Special Weather Statement | OKX | Bronx | 46 min |
| Sep 7, 5:43 PM EDT | Special Weather Statement | OKX | Westchester | 62 min |
| Sep 7, 4:30 PM EDT | Areal Flood Advisory | OKX | Bergen | 60 min |
Nearby
Severe Thunderstorm Warnings in New York, 2012Severe Thunderstorm Warnings in New Jersey, 2012Every severe thunderstorm warning in 2012
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.