Alert archive / New York / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 90, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Aug 5, 1997, 6:55 PM EDT for Nassau County, New York. It was in force for 35 min. 1 report 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
- Aug 5, 1997, 6:55 PM EDT (22:55 UTC)
- Expired
- Aug 5, 1997, 7:30 PM EDT
- In force
- 35 min
- Issued by
- NWS New York, NY
- Area
- Whole counties
County Nassau County, NY
The radar
The Brookhaven radar (KOKX), 62 km from the middle of the area, began a volume at 22:54 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 |
|---|---|---|---|
| Aug 5, 6:57 PM EDT | Hail 0.88 | North Massapequa, NY |
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 12:00Z, 10.9 hours before the alert went out and 62 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
- 107 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 474 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNYC 052258 RRA SVRNYC NYC059-052345- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW YORK NY 655 PM EDT TUE AUG 5 1997 THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM EDT FOR THE PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST NEW YORK ...SOUTHERN NASSAU COUNTY AND THE ADJACENT COASTAL WATERS THE SEVERE THUNDERSTORM WARNING FOR NASSAU COUNTY IS EXTENDED FOR THE SOUTHERN PORTION OF THE COUNTY UNTIL 7:30 PM. SEVERE THUNDERSTORMS ARE ALONG THE SOUTHERN STATE PARKWAY AS OF 6:55 PM AND WILL BE IN THE FREEPORT AREA BY 7:05 PM. THESE STORMS WILL CONTINUE TO DRIFT SOUTH TOWARDS THE SOUTH SHORE BEACHEBY 7:30 PM. THESE STORMS HAVE A HISTORY OF NICKLE SIZED HAIL IN THE VALLEY STREAM AREA. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICALt APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. &
The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 3:04 PM EDT | Severe Thunderstorm Warning | OKX | Orange | 56 min |
| Aug 5, 5:55 PM EDT | Severe Thunderstorm Warning | OKX | Nassau, Queens | 65 min |
| Aug 5, 6:31 PM EDT | Severe Thunderstorm Warning | OKX | Suffolk | 44 min |
Nearby
Severe Thunderstorm Warnings in New York, 1997Every severe thunderstorm warning in 1997
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.