Alert archive / New York / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 5, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Apr 5, 2023, 11:09 AM EDT for Jefferson County, Lewis County, Oswego County, New York. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 5, 2023, 11:09 AM EDT (15:09 UTC)
- Expired
- Apr 5, 2023, 12:15 PM EDT
- In force
- 66 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Jefferson County, NY, Lewis County, NY, Oswego County, NY
The radar
The Ft Drum radar (KTYX), 18 km from the middle of the area, began a volume at 15:11 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.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 3.2 hours before the alert went out and 244 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
- 1420 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 492 m²/s²
- 0-3 km storm-relative helicity
- 502 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 Buffalo, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 5, 6:48 AM EDT, 4 hours 21 minutes earlier.
Area forecast discussion, Apr 5, 6:48 AM EDT, 4 hours 21 minutes before
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</html>Hazardous weather outlook, Apr 5, 5:03 AM EDT, 6 hours 6 minutes before
Hazardous Weather Outlook...CORRECTED National Weather Service Buffalo NY 503 AM EDT Wed Apr 5 2023 NYZ001>004-010>014-019>021-085-060915- Niagara-Orleans-Monroe-Wayne-Northern Erie-Genesee-Wyoming- Livingston-Ontario-Chautauqua-Cattaraugus-Allegany-Southern Erie- 503 AM EDT Wed Apr 5 2023 This Hazardous Weather Outlook is for western New York. .DAY ONE...Today and tonight. Strong to severe thunderstorms will be possible this afternoon and evening. While the main severe weather threat will be damaging straight line winds and localized heavy rain...there will also be a non-zero potential for large hail and a tornado or two...with the tornado risk greatest across the western Southern Tier. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability of widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ005>008-060915- Northern Cayuga-Oswego-Jefferson-Lewis- 503 AM EDT Wed Apr 5 2023 This Hazardous Weather Outlook is for north central New York. .DAY ONE...Today and tonight. Strong to severe thunderstorms will be possible this afternoon and evening. The main severe weather threat will be damaging straight line winds and localized heavy rain. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf LEZ020-040-041-LOZ030-042>045-062>065-SLZ022-024-060915- Upper Niagara River and Buffalo Harbor- Lake Erie nearshore waters from Ripley to Dunkirk- Lake Erie nearshore waters from Dunkirk to Buffalo- Lower Niagara River- Lake Ontario nearshore waters from the Niagara River to Hamlin Beach- Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay- Lake Ontario nearshore waters from Sodus Bay to Mexico Bay- Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence River- Lake Ontario open waters from the Niagara River to Hamlin Beach- Lake Ontario open waters from Hamlin Beach to Sodus Bay- Lake Ontario open waters from Sodus Bay to Mexico Bay- Lake Ontario open waters from Mexico Bay to the Saint Lawrence River- Saint Lawrence River from Cape Vincent to Ogdensburg- Saint Lawrence River from Ogdensburg to Saint Regis- 503 AM EDT Wed Apr 5 2023 This Hazardous Weather Outlook is for the New York waters of Lake Erie, Lake Ontario, and the Saint Lawrence River. .DAY ONE...Today and tonight. Strong to severe thunderstorms will be possible this afternoon and evening. The main severe weather threat will be strong straight line winds. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability of widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf JJR
In the hours before
Special weather statement, Apr 5, 10:55 AM EDT, 14 minutes before
Special Weather Statement National Weather Service Buffalo NY 1055 AM EDT Wed Apr 5 2023 NYZ007-051800- Jefferson- Including the city of Watertown 1055 AM EDT Wed Apr 5 2023 ...FREEZING RAIN AND MINOR ICE ACCUMULATION NEAR THE SAINT LAWRENCE RIVER THROUGH EARLY AFTERNOON... Localized freezing rain is occurring over far northern Jefferson county to the north of Watertown and Fort Drum. Expect the freezing rain to continue into early afternoon, along with some thunderstorms, before temperatures moderate just above freezing. Additional ice accumulation is possible, especially on elevated surfaces. Untreated roads could have patchy icy spots, so use caution if traveling. JLA
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 4:00 AM EDT | Small Craft Advisory | BUF | 16 hr | |
| Apr 5, 9:51 AM EDT | Special Marine Warning | BUF | 54 min | |
| Apr 5, 10:29 AM EDT | Special Marine Warning | BUF | 61 min | |
| Apr 5, 11:52 AM EDT | Special Weather Statement | BUF | Lewis | 53 min |
| Apr 5, 12:11 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Lewis | 46 min |
| Apr 5, 1:35 PM EDT | Special Marine Warning | BUF | 25 min | |
| Apr 5, 1:38 PM EDT | Special Weather Statement | BUF | Niagara | 37 min |
| Apr 5, 1:59 PM EDT | Special Marine Warning | BUF | 61 min | |
| Apr 5, 2:05 PM EDT | Special Weather Statement | BUF | Monroe, Orleans | 25 min |
| Apr 5, 2:08 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Monroe, Orleans | 37 min |
| Apr 5, 5:06 PM EDT | Special Weather Statement | BUF | Livingston | 24 min |
Nearby
Severe Thunderstorm Warnings in New York, 2023Every severe thunderstorm warning in 2023
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.