Alert archive / New York / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 47, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Aug 14, 1999, 3:24 PM EDT for Orange County, New York. It was in force for 51 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 14, 1999, 3:24 PM EDT (19:24 UTC)
- Expired
- Aug 14, 1999, 4:15 PM EDT
- In force
- 51 min
- Issued by
- NWS New York, NY
- Area
- Whole counties
County Orange County, NY
The radar
The Albany radar (KENX), 133 km from the middle of the area, began a volume at 19:28 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 14, 3:37 PM EDT | Thunderstorm Wind 52 | Montgomery, 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, 7.4 hours before the alert went out and 135 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
- 28 J/kg
- Mixed-layer CIN
- -255 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS New York, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 14, 2:30 PM EDT, 54 minutes earlier.
Area forecast discussion, Aug 14, 2:30 PM EDT, 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW YORK NY 230 PM EDT SAT AUG 14 1999 NGM ONLY GUIDANCE PLUS AFOS PROBLEMS. COLD FRONT OVER WESTERN PENNSYLVANIA WILL REACH THE COAST LATE TONIGHT AND MOVE SLOWLY EAST OF THE AREA ON SUNDAY. SHOWERS AND TSTMS SHOULD MOVE ACROSS THE AREA THIS EVENING AND TONIGHT AND LINGER ON SUNDAY AS THE FRONT WILL BE SLOW TO CLEAR THE AREA. SOME SEVERE TSTMS ARE POSSIBLE INTO EARLY TONIGHT WITH STRONG WINDS AND HAIL. DRIER AIR WILL MOVE IN SUNDAY NIGHT AND MONDAY AS HIGH PRESSURE BUILDS IN FROM THE WEST. TEMPERATURES WILL BE CLOSE TO SEASONAL LEVELS OVER THE NEXT FEW DAYS. WILL KEEP SCA IN EFFECT AS WINDS WILL CONTINUE RATHER STRONG THIS EVENING. .NYC/OKX...SCA ALL WTRS...ANZ330-335-338-350-353-355. SEVERE TSTM WATCH IN EFFECT FOR NEW JERSEY ZONES 2>6-11...NEW YORK ZONES 72>77.
The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 5:39 PM EDT | Severe Thunderstorm Warning | OKX | Putnam, Westchester | 61 min |
| Aug 14, 6:42 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 33 min |
| Aug 14, 7:19 PM EDT | Severe Thunderstorm Warning | OKX | Rockland | 41 min |
| Aug 14, 7:35 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 55 min |
| Aug 14, 6:05 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 55 min |
| Aug 14, 7:29 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 61 min |
Nearby
Severe Thunderstorm Warnings in New York, 1999Every severe thunderstorm warning in 1999
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.