Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 2, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Apr 21, 2021, 1:41 PM EDT for Orange County, Rockland County, New York; 5 counties in New Jersey. It was in force for 64 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 21, 2021, 1:41 PM EDT (17:41 UTC)
- Expired
- Apr 21, 2021, 2:45 PM EDT
- In force
- 64 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
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 Philadelphia radar (KDIX), 111 km from the middle of the area, began a volume at 17:43 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 21, 2:10 PM EDT | TSTM WND DMG | 1 Sw Ridgewood, NJ | CORRECTS TIME FROM PREVIOUS TSTM WND DMG REPORT FROM 1 SW RIDGEWOOD. TREE DOWN, BLOCKING BELMONT AVENUE. |
| Apr 21, 2:18 PM EDT | TSTM WND DMG | 1 Sw Ridgewood, NJ | CORRECTS TIME PREVIOUS TSTM WND DMG REPORT FROM 1 SW RIDGEWOOD. CORRECTS TIME FROM PREVIOUS TSTM WND DMG REPORT FROM 1 SW RIDGEWOOD. TREE DOWN, BLOCKING BELMONT AVENUE. |
| Apr 21, 2:18 PM EDT | TSTM WND DMG | Woodcliff Lake, NJ | TREES AND WIRES DOWN ON ROAD. |
| Apr 21, 2:41 PM EDT | TSTM WND DMG | 1 Sw Ridgewood, NJ | TREE DOWN, BLOCKING BELMONT AVENUE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 21, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 5.7 hours before the alert went out and 119 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
- 1427 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
898
WUUS51 KOKX 211741
SVROKX
NJC003-013-017-031-039-NYC071-087-211845-
/O.NEW.KOKX.SV.W.0002.210421T1741Z-210421T1845Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
141 PM EDT Wed Apr 21 2021
The National Weather Service in Upton NY has issued a
* Severe Thunderstorm Warning for...
Hudson County in northeastern New Jersey...
Passaic County in northeastern New Jersey...
Union County in northeastern New Jersey...
Bergen County in northeastern New Jersey...
Essex County in northeastern New Jersey...
Southern Orange County in southeastern New York...
Rockland County in southeastern New York...
* Until 245 PM EDT.
* At 141 PM EDT, severe thunderstorms were located along a line
extending from near Unionville to near Cloverhill, moving east at
35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Severe thunderstorms will be near...
Warwick and Florida around 150 PM EDT.
Goshen around 155 PM EDT.
Chester around 200 PM EDT.
Monroe around 205 PM EDT.
Harriman around 210 PM EDT.
Plainfield around 220 PM EDT.
West Point and New Windsor around 225 PM EDT.
Clark around 230 PM EDT.
Linden around 240 PM EDT.
Bayonne around 245 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4059 7446 4067 7440 4067 7446 4076 7436
4090 7434 4090 7427 4097 7428 4105 7445
4104 7450 4109 7450 4120 7437 4135 7461
4150 7399 4140 7395 4125 7397 4113 7389
4070 7402 4065 7406 4065 7419 4059 7420
TIME...MOT...LOC 1741Z 257DEG 29KT 4132 7448 4044 7481
HAIL...<.75IN
WIND...60MPH
$$2 follow-up statements
953
WWUS51 KOKX 211826
SVSOKX
Severe Weather Statement
National Weather Service New York NY
226 PM EDT Wed Apr 21 2021
NJC013-017-031-039-NYC071-211835-
/O.CAN.KOKX.SV.W.0002.000000T0000Z-210421T1845Z/
Hudson NJ-Passaic NJ-Union NJ-Essex NJ-Orange NY-
226 PM EDT Wed Apr 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR HUDSON...PASSAIC...UNION...
ESSEX AND SOUTHERN ORANGE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
northeastern New Jersey...and southeastern New York.
LAT...LON 4089 7413 4092 7413 4092 7414 4093 7414
4094 7415 4097 7414 4097 7415 4108 7417
4113 7389 4089 7396 4088 7412
TIME...MOT...LOC 1825Z 258DEG 45KT 4099 7392
$$
NJC003-NYC087-211845-
/O.CON.KOKX.SV.W.0002.000000T0000Z-210421T1845Z/
Bergen NJ-Rockland NY-
226 PM EDT Wed Apr 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR CENTRAL BERGEN AND ROCKLAND COUNTIES...
At 225 PM EDT, a severe thunderstorm was located over Norwood, or
over Tappan, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
This severe thunderstorm will remain over ${noLocPhrase} of central
Bergen and Rockland Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4089 7413 4092 7413 4092 7414 4093 7414
4094 7415 4097 7414 4097 7415 4108 7417
4113 7389 4089 7396 4088 7412
TIME...MOT...LOC 1825Z 258DEG 45KT 4099 7392
HAIL...<.75IN
WIND...60MPH
$$778
WWUS51 KOKX 211835
SVSOKX
Severe Weather Statement
National Weather Service New York NY
235 PM EDT Wed Apr 21 2021
NJC003-NYC087-211845-
/O.EXP.KOKX.SV.W.0002.000000T0000Z-210421T1845Z/
Bergen NJ-Rockland NY-
235 PM EDT Wed Apr 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BERGEN AND ROCKLAND
COUNTIES WILL EXPIRE AT 245 PM EDT...
The severe thunderstorm which prompted the warning will continue to
move out of the warned area. Therefore, the warning will be allowed
to expire.
A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
northeastern New Jersey...and southeastern New York.
LAT...LON 4089 7413 4092 7413 4092 7414 4093 7414
4094 7415 4097 7414 4097 7415 4108 7417
4113 7389 4089 7396 4088 7412
TIME...MOT...LOC 1835Z 257DEG 29KT 4101 7382
$$The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 8:48 PM EDT | Freeze Watch | OKX | Orange, Putnam | 7 hr |
| Apr 21, 3:41 AM EDT | Freeze Warning | OKX | Orange, Putnam, Rockland, Westchester | 29 hr |
| Apr 21, 10:58 AM EDT | Special Weather Statement | OKX | Nassau | 47 min |
| Apr 21, 12:52 PM EDT | Special Weather Statement | OKX | Suffolk | 23 min |
| Apr 21, 1:23 PM EDT | Special Weather Statement | OKX | Orange, Rockland | 67 min |
| Apr 21, 2:05 PM EDT | Special Weather Statement | OKX | Bronx, Kings, Nassau, New York, Putnam, Queens and 2 more | 85 min |
| Apr 21, 2:10 PM EDT | Severe Thunderstorm Warning | OKX | Putnam | 50 min |
| Apr 21, 2:12 PM EDT | Severe Thunderstorm Warning | OKX | Bronx, Nassau, New York, Queens, Westchester | 48 min |
| Apr 21, 2:14 PM EDT | Special Marine Warning | OKX | 61 min | |
| Apr 21, 2:28 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 47 min |
| Apr 21, 2:34 PM EDT | Special Marine Warning | OKX | 86 min | |
| Apr 21, 2:53 PM EDT | Severe Thunderstorm Warning | OKX | Putnam, Westchester | 67 min |
| Apr 21, 3:07 PM EDT | Special Marine Warning | OKX | 113 min | |
| Apr 21, 3:17 PM EDT | Severe Thunderstorm Warning | OKX | Nassau, Suffolk | 19 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2021Severe Thunderstorm Warnings in New York, 2021Every severe thunderstorm warning in 2021
Sources
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.