Alert archive / New York / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 813
The Storm Prediction Center issued this severe thunderstorm watch at Sep 6, 1998, 11:30 PM EDT for 23 counties in New York; Warren County, Pennsylvania. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 1998, 11:30 PM EDT (03:30 UTC)
- Expired
- Sep 7, 1998, 5:00 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Monroe County, NY, Niagara County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Orleans County, NY, Oswego County, NY, Seneca County, NY, St. Lawrence County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Warren County, PA
The radar
The Buffalo radar (KBUF), 91 km from the middle of the area, began a volume at 03:33 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.
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 11:41 PM EDT | Severe Thunderstorm Warning | BUF | Orleans | 49 min |
| Sep 6, 11:52 PM EDT | Severe Thunderstorm Warning | BUF | Genesee | 63 min |
| Sep 6, 11:58 PM EDT | Severe Thunderstorm Warning | BUF | Erie | 32 min |
| Sep 7, 12:07 AM EDT | Severe Thunderstorm Warning | BUF | Monroe | 63 min |
| Sep 7, 12:22 AM EDT | Severe Thunderstorm Warning | BUF | Wayne | 63 min |
| Sep 7, 12:28 AM EDT | Severe Thunderstorm Warning | ALY | Hamilton, Herkimer | 92 min |
| Sep 7, 12:29 AM EDT | Severe Thunderstorm Warning | BUF | Erie, Wyoming | 66 min |
| Sep 7, 12:36 AM EDT | Severe Thunderstorm Warning | BUF | Livingston | 64 min |
| Sep 7, 12:46 AM EDT | Severe Thunderstorm Warning | BUF | Cayuga | 64 min |
| Sep 7, 12:52 AM EDT | Severe Thunderstorm Warning | BGM | Cayuga, Seneca, Yates | 58 min |
| Sep 7, 12:52 AM EDT | Severe Thunderstorm Warning | BGM | Onondaga | 58 min |
| Sep 7, 1:01 AM EDT | Severe Thunderstorm Warning | BUF | Oswego | 64 min |
| Sep 7, 1:05 AM EDT | Tornado Warning | BGM | Madison, Oneida, Onondaga | 60 min |
| Sep 7, 1:13 AM EDT | Severe Thunderstorm Warning | BUF | Ontario | 67 min |
| Sep 7, 1:16 AM EDT | Severe Thunderstorm Warning | BUF | Allegany | 34 min |
| Sep 7, 1:34 AM EDT | Tornado Warning | BGM | Madison, Onondaga | 56 min |
| Sep 7, 1:48 AM EDT | Severe Thunderstorm Warning | ALY | Fulton, Hamilton, Herkimer, Montgomery | 2 hr |
| Sep 7, 1:48 AM EDT | Tornado Warning | BGM | Oneida | 47 min |
| Sep 7, 1:59 AM EDT | Tornado Warning | ALY | Herkimer | 61 min |
| Sep 7, 2:40 AM EDT | Severe Thunderstorm Warning | BUF | Allegany | 65 min |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 3.5 hours before the alert went out and 89 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
- 1469 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 1188 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 1:15 AM EDT | Severe Thunderstorm Watch | SPC | Albany, Broome, Chemung, Chenango, Columbia, Cortland and 16 more | 5 hr |
| Sep 7, 3:30 AM EDT | Severe Thunderstorm Watch | SPC | Columbia, Rensselaer | 5 hr |
| Sep 7, 5:45 AM EDT | Severe Thunderstorm Watch | SPC | Bronx, Dutchess, Kings, Nassau, New York, Orange and 7 more | 4 hr |
| Sep 7, 10:45 AM EDT | Severe Thunderstorm Watch | SPC | Sullivan | 5 hr |
| Sep 7, 1:30 PM EDT | Severe Thunderstorm Watch | SPC | Bronx, Dutchess, Kings, Nassau, New York, Orange and 7 more | 6 hr |
| Sep 7, 8:15 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 29 more | 6 hr |
Nearby
Severe Thunderstorm Watches in New York, 1998Severe Thunderstorm Watches in Pennsylvania, 1998Every severe thunderstorm watch in 1998
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.