Alert archive / New York / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 49, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jul 31, 1999, 6:57 PM EDT for Allegany County, New York. It was in force for 33 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
- Jul 31, 1999, 6:57 PM EDT (22:57 UTC)
- Expired
- Jul 31, 1999, 7:30 PM EDT
- In force
- 33 min
- Issued by
- NWS Buffalo, NY
- Area
- Whole counties
County Allegany County, NY
The radar
The Buffalo radar (KBUF), 96 km from the middle of the area, began a volume at 22:57 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 31, 7:10 PM EDT | Thunderstorm Wind | Almond, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 31, 4:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.0 hours before the alert went out and 93 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
- 2312 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 76 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 KBUF 312258 RRA SVRBUF NYC003-312330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BUFFALO NY 657 PM EDT SAT JUL 31 1999 THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN ALLEGANY COUNTY IN WESTERN NEW YORK * UNTIL 730 PM EDT * AT 6:55 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTHWEST OF ALFRED...MOVING EAST AT 40 MILES AN HOUR. * THE SEVERE THUNDERSTORM WILL BE MOVING OUT OF THE EASTERN PORTION OF THE COUNTY BY 7:30 PM EDT. IF YOU ARE IN THESE AREAS...SEEK SAFETY IN A SMALL INTERIOR ROOM AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST PROTECTION. BE ON THE ALERT FOR THUNDERSTORMS ACCOMPANIED BY DAMAGING WINDS...FREQUENT LIGHTNING AND HAIL. LOCALLY HEAVY RAINFALL MAY ALSO PRODUCE DRAINAGE FLOODING. RSH
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 4:46 PM EDT | Severe Thunderstorm Warning | BUF | Niagara | 64 min |
| Jul 31, 4:53 PM EDT | Severe Thunderstorm Warning | BUF | Erie | 62 min |
| Jul 31, 5:02 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Orleans | 78 min |
| Jul 31, 5:09 PM EDT | Severe Thunderstorm Warning | BUF | Monroe, Wayne | 66 min |
| Jul 31, 5:15 PM EDT | Severe Thunderstorm Warning | BUF | Wyoming | 65 min |
| Jul 31, 5:20 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 65 min |
| Jul 31, 5:32 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Livingston | 78 min |
| Jul 31, 5:36 PM EDT | Severe Thunderstorm Warning | BUF | Ontario, Wayne | 79 min |
| Jul 31, 5:50 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Oswego | 95 min |
| Jul 31, 6:19 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua | 76 min |
| Jul 31, 6:24 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson | 76 min |
| Jul 31, 6:48 PM EDT | Severe Thunderstorm Warning | BUF | Lewis | 62 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.