Alert archive / New York / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 21, NWS New York, NY

July 1, 2001Nassau County, Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 1, 2001, 1:18 AM EDT for Nassau County, Suffolk County, New York. It was in force for 42 min. 4 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 1, 2001, 1:18 AM EDT (05:18 UTC)
Expired: Jul 1, 2001, 2:00 AM EDT
In force: 42 min
Issued by: NWS New York, NY
Area: Whole counties

Counties Nassau County, NY, Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 23 km from the middle of the area, began a volume at 05:22 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
Jul 1, 1:30 AM EDT	Tornado F0	Hampton Bays, NY	As a severe thunderstorm moved southeast at 40 to 50 mph, it produced a quick hitting microburst followed by a weak F0 tornado. The first report of damage occurred around 1:30 am EDT on Channing Cross Road near Newton Road in Hampton Bays. Several large tree
Jul 1, 1:35 AM EDT	Hail 1.75	Shinnecock Hills, NY	Golf ball size hail was reported near the Shinnecock Canal and at the Peconic Beach Club.
Jul 1, 1:35 AM EDT	Tornado F0	Shinnecock Hills, NY	As the severe thunderstorm continued southeast, it spawned another short-lived weak tornado near Peconic Beach. On the property of the Peconic Beach Club, several boats were picked up and damaged. One small catamaran was picked up and blown through the side
Jul 1, 1:40 AM EDT	Thunderstorm Wind 61 E	Water Mill, NY	As the severe thunderstorm continued southeast across Southampton, it produced high winds that damaged trees along its path from Mill Pond to Water Mill to Sagaponack. In Mill Pond, several large trees were blown down along Head of the Pond Road, and both upp

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 5.3 hours before the alert went out and 23 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1564 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KOKX 010521
SVROKX

NYC059-103-010600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
118 AM EDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN NASSAU COUNTY IN SOUTHEAST NEW YORK
  SOUTHWESTERN SUFFOLK COUNTY IN SOUTHEAST NEW YORK

* UNTIL 200 AM EDT

* AT 117 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS FROM NEAR LEVITTOWN TO JONES BEACH 
  STATE PARK MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  FARMINGDALE...AMITYVILLE...FIRE ISLAND INLET AROUND 125 AM EDT
  BABYLON AND ROBERT MOSES STATE PARK AROUND 130 AM EDT
  BAY SHORE AND ISLIP AROUND 135 AM EDT

WINDS WITH THESE STORMS MAY GUST TO NEAR 60 MPH. 

$$

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVIC+E FORECAST
OFFICE IN UPTON NY.

LAT...LON 4071 7372 4053 7344 4064 7269 4085 7294

The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 12:14 AM EDT	Severe Thunderstorm Warning	OKX	Richmond	46 min
Jul 1, 3:07 PM EDT	Severe Thunderstorm Warning	OKX	Orange	38 min
Jul 1, 3:37 PM EDT	Severe Thunderstorm Warning	OKX	Rockland	23 min
Jul 1, 3:49 PM EDT	Severe Thunderstorm Warning	OKX	Suffolk	41 min
Jul 1, 4:08 PM EDT	Severe Thunderstorm Warning	OKX	Putnam	52 min
Jul 1, 4:26 PM EDT	Severe Thunderstorm Warning	OKX	Nassau	34 min
Jul 1, 4:48 PM EDT	Severe Thunderstorm Warning	OKX	Rockland	27 min
Jul 1, 5:04 PM EDT	Severe Thunderstorm Warning	OKX	Suffolk	41 min
Jul 1, 5:22 PM EDT	Severe Thunderstorm Warning	OKX	Suffolk	38 min

Nearby

Severe Thunderstorm Warnings in New York, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.