Alert archive / New York / Tornado Warnings in 2011
Tornado Warning 7, NWS New York, NY
NWS New York, NY issued this tornado warning at Aug 21, 2011, 4:58 PM EDT for Putnam County, New York. It was in force for 30 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 21, 2011, 4:58 PM EDT (20:58 UTC)
- Expired
- Aug 21, 2011, 5:28 PM EDT
- In force
- 30 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
County Putnam County, NY
The radar
The Brookhaven radar (KOKX), 86 km from the middle of the area, began a volume at 21:00 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 21, 12:52 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.0 hours before the alert went out and 86 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
- 874 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 857 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
856
WFUS51 KOKX 212058
TOROKX
NYC079-212145-
/O.NEW.KOKX.TO.W.0007.110821T2058Z-110821T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
458 PM EDT SUN AUG 21 2011
THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A
* TORNADO WARNING FOR...
PUTNAM COUNTY IN SOUTHEAST NEW YORK...
* UNTIL 545 PM EDT...
* AT 456 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES SOUTH OF
BREWSTER...OR NEAR MAHOPAC...MOVING EAST AT 15 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BREWSTER HILL AND PEACH LAKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM SUNDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.
&&
LAT...LON 4146 7354 4142 7354 4136 7354 4135 7374
4146 7363
TIME...MOT...LOC 2058Z 253DEG 14KT 4132 7365
$$
BC1 follow-up statement
371
WWUS51 KOKX 212128
SVSOKX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
528 PM EDT SUN AUG 21 2011
NYC079-212138-
/O.CAN.KOKX.TO.W.0007.000000T0000Z-110821T2145Z/
PUTNAM NY-
528 PM EDT SUN AUG 21 2011
...THE TORNADO WARNING FOR PUTNAM COUNTY IS CANCELLED...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM SUNDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.
LAT...LON 4146 7354 4142 7354 4136 7354 4135 7374
4146 7363
TIME...MOT...LOC 2128Z 253DEG 14KT 4135 7350
$$
BCThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 3:49 AM EDT | Small Craft Advisory | OKX | 30 hr | |
| Aug 21, 6:00 AM EDT | Flash Flood Watch | OKX | Bronx, Kings, Nassau, New York, Orange, Putnam and 4 more | 15 hr |
| Aug 21, 11:32 AM EDT | Special Weather Statement | OKX | Bronx, New York | 43 min |
| Aug 21, 12:13 PM EDT | Special Weather Statement | OKX | Bronx | 47 min |
| Aug 21, 12:26 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 49 min |
| Aug 21, 12:51 PM EDT | Special Weather Statement | OKX | Orange | 54 min |
| Aug 21, 12:59 PM EDT | Severe Thunderstorm Warning | OKX | Putnam | 23 min |
| Aug 21, 1:09 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 21 min |
| Aug 21, 1:17 PM EDT | Special Weather Statement | OKX | Rockland | 58 min |
| Aug 21, 1:23 PM EDT | Special Weather Statement | OKX | Putnam | 67 min |
| Aug 21, 1:28 PM EDT | Special Weather Statement | OKX | Orange | 62 min |
| Aug 21, 1:43 PM EDT | Severe Thunderstorm Warning | OKX | Putnam, Rockland, Westchester | 47 min |
| Aug 21, 2:15 PM EDT | Severe Thunderstorm Warning | OKX | Putnam | 21 min |
| Aug 21, 3:43 PM EDT | Special Marine Warning | OKX | 32 min | |
| Aug 21, 4:00 PM EDT | Severe Thunderstorm Warning | OKX | Putnam, Westchester | 45 min |
| Aug 21, 4:07 PM EDT | Severe Thunderstorm Warning | OKX | Kings, Nassau, Queens | 38 min |
| Aug 21, 4:20 PM EDT | Special Marine Warning | OKX | 40 min | |
| Aug 21, 4:37 PM EDT | Tornado Warning | OKX | Putnam, Westchester | 38 min |
| Aug 21, 4:47 PM EDT | Severe Thunderstorm Warning | OKX | Nassau, Queens, Suffolk | 17 min |
| Aug 21, 5:51 PM EDT | Special Weather Statement | OKX | Rockland, Westchester | 39 min |
| Aug 21, 6:33 PM EDT | Areal Flood Advisory | OKX | Orange, Rockland | 117 min |
| Aug 21, 6:38 PM EDT | Special Weather Statement | OKX | Rockland | 52 min |
| Aug 21, 6:46 PM EDT | Flash Flood Warning | OKX | Orange, Rockland | 56 min |
| Aug 21, 7:19 PM EDT | Special Weather Statement | OKX | Putnam | 41 min |
| Aug 21, 7:25 PM EDT | Areal Flood Advisory | OKX | Putnam, Westchester | 2 hr |
Nearby
Tornado Warnings in New York, 2011Every tornado warning in 2011Tornadoes in 2011
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.