Alert archive / New York / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 99, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Aug 27, 2020, 4:28 PM EDT for 5 counties in New York. It was in force for 77 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 27, 2020, 4:28 PM EDT (20:28 UTC)
- Expired
- Aug 27, 2020, 5:45 PM EDT
- In force
- 77 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Wyoming County, NY
The radar
The Buffalo radar (KBUF), 92 km from the middle of the area, began a volume at 20:28 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 27, 4:28 PM EDT | TSTM WND DMG | York, NY | TREES AND WIRES DOWN |
| Aug 27, 4:34 PM EDT | TSTM WND DMG | Geneseo, NY | SEVERAL TREES DOWN THROUGHOUT TOWN |
| Aug 27, 4:40 PM EDT | TSTM WND DMG | 1 Nw Covington, NY | TREE DOWN ACROSS ROUTE 19 |
| Aug 27, 4:46 PM EDT | TSTM WND DMG | Pavilion, NY | TREE DOWN ON A HOUSE ALONG ROUTE 63. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this severe thunderstorm warning; the first came 0 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 27, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.5 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
- 1176 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 246 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 8.5
The text
As transmitted.
609
WUUS51 KBUF 272028
SVRBUF
NYC037-051-055-069-121-272145-
/O.NEW.KBUF.SV.W.0099.200827T2028Z-200827T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
428 PM EDT Thu Aug 27 2020
The National Weather Service in Buffalo has issued a
* Severe Thunderstorm Warning for...
Northeastern Wyoming County in western New York...
Livingston County in western New York...
Southwestern Monroe County in western New York...
Southeastern Genesee County in western New York...
Southwestern Ontario County in western New York...
* Until 545 PM EDT..
* At 428 PM EDT, a severe thunderstorm was located over Pavilion, or
9 miles southeast of Batavia, moving southeast at 40 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Batavia, Geneseo, Dansville, Letchworth State Park, Le Roy, Perry,
Warsaw, Avon, Mount Morris and Honeoye Falls.
This includes the following highways...
Interstate 390 between exits 4 and 11.
Interstate 90 near exit 48.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4276 7827 4303 7828 4300 7758 4285 7763
4276 7725 4276 7731 4273 7734 4267 7736
4267 7737 4258 7737 4258 7766 4254 7766
4253 7772 4250 7772
TIME...MOT...LOC 2028Z 298DEG 33KT 4289 7805
HAIL...1.50IN
WIND...60MPH
$$
HSK4 follow-up statements
420
WWUS51 KBUF 272106
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
506 PM EDT Thu Aug 27 2020
NYC037-051-055-069-121-272145-
/O.CON.KBUF.SV.W.0099.000000T0000Z-200827T2145Z/
Wyoming NY-Livingston NY-Monroe NY-Genesee NY-Ontario NY-
506 PM EDT Thu Aug 27 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN WYOMING...LIVINGSTON...SOUTHWESTERN MONROE...
SOUTHEASTERN GENESEE AND SOUTHWESTERN ONTARIO COUNTIES...
At 506 PM EDT, a severe thunderstorm was located over Conesus, or 10
miles southeast of Geneseo, moving southeast at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Geneseo, Dansville, Letchworth State Park, Le Roy, Perry, Warsaw,
Avon, Mount Morris, Honeoye Falls and Pavilion.
This includes Interstate 390 between exits 4 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4273 7821 4302 7801 4300 7758 4285 7763
4276 7725 4276 7731 4273 7734 4267 7736
4267 7737 4258 7737 4258 7766 4254 7766
4253 7772 4250 7772
TIME...MOT...LOC 2106Z 298DEG 33KT 4273 7763
HAIL...1.00IN
WIND...60MPH
$$
HSK188
WWUS51 KBUF 272128
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
528 PM EDT Thu Aug 27 2020
NYC037-055-121-272137-
/O.CAN.KBUF.SV.W.0099.000000T0000Z-200827T2145Z/
Wyoming NY-Monroe NY-Genesee NY-
528 PM EDT Thu Aug 27 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WYOMING...
SOUTHWESTERN MONROE AND SOUTHEASTERN GENESEE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
western New York.
LAT...LON 4263 7799 4295 7780 4292 7761 4285 7763
4276 7726 4276 7731 4273 7734 4267 7736
4267 7737 4258 7737 4258 7766 4254 7766
4253 7772 4250 7772
TIME...MOT...LOC 2127Z 298DEG 33KT 4264 7739
$$
NYC051-069-272145-
/O.CON.KBUF.SV.W.0099.000000T0000Z-200827T2145Z/
Livingston NY-Ontario NY-
528 PM EDT Thu Aug 27 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR LIVINGSTON AND SOUTHWESTERN ONTARIO COUNTIES...
At 527 PM EDT, a severe thunderstorm was located over Naples, or 16
miles east of Dansville, moving southeast at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Geneseo, Dansville, Letchworth State Park, Avon, Mount Morris,
Conesus, Lima, Naples, Honeoye and Hemlock.
This includes Interstate 390 between exits 4 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4263 7799 4295 7780 4292 7761 4285 7763
4276 7726 4276 7731 4273 7734 4267 7736
4267 7737 4258 7737 4258 7766 4254 7766
4253 7772 4250 7772
TIME...MOT...LOC 2127Z 298DEG 33KT 4264 7739
HAIL...1.00IN
WIND...60MPH
$$
HSK931
WWUS51 KBUF 272139
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
539 PM EDT Thu Aug 27 2020
NYC051-069-272145-
/O.CON.KBUF.SV.W.0099.000000T0000Z-200827T2145Z/
Livingston NY-Ontario NY-
539 PM EDT Thu Aug 27 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EAST CENTRAL LIVINGSTON AND SOUTHWESTERN ONTARIO COUNTIES...
At 539 PM EDT, a severe thunderstorm was located over Italy, or 11
miles southwest of Penn Yan, moving southeast at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Conesus, Naples, Honeoye, Hemlock, Springwater, Canadice, Bristol
Mountain and Hunt Hollow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4285 7763 4276 7726 4276 7731 4273 7734
4267 7736 4267 7737 4258 7737 4262 7764
4272 7769
TIME...MOT...LOC 2139Z 298DEG 33KT 4259 7726
HAIL...1.00IN
WIND...60MPH
$$
HSK777
WWUS51 KBUF 272144
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
544 PM EDT Thu Aug 27 2020
NYC051-069-272154-
/O.EXP.KBUF.SV.W.0099.000000T0000Z-200827T2145Z/
Livingston NY-Ontario NY-
544 PM EDT Thu Aug 27 2020
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LIVINGSTON AND
SOUTHWESTERN ONTARIO COUNTIES WILL EXPIRE AT 545 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
western New York.
LAT...LON 4285 7763 4276 7726 4276 7731 4273 7734
4267 7736 4267 7737 4258 7737 4262 7764
4272 7769
TIME...MOT...LOC 2144Z 298DEG 33KT 4257 7722
$$
HSKWhat 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 Aug 27, 2:13 PM EDT, 2 hours 15 minutes earlier.
Area forecast discussion, Aug 27, 2:13 PM EDT, 2 hours 15 minutes before
Area Forecast Discussion
National Weather Service Buffalo NY
213 PM EDT Thu Aug 27 2020
.SYNOPSIS...
An active period of weather lies ahead for the next few days as a
frontal boundary lingers nearby through the first half of the
weekend. This will mean periods of showers and thunderstorms through
Saturday which may bring heavy rain to parts of the region. Cooler
and drier air will settle into the region Sunday and into early next
week.
&&
.NEAR TERM /THROUGH FRIDAY/...
Warm frontal boundary looks to have made as far east as
Fulton/Syracuse this afternoon. Cooling northeast flow and
abundant cloud cover north of the front keeping the North
Country in the 60s with just a few showers.
South of the warm front, moderate instability has developed
with SBCAPES now running 1500-2000 J/kg. Line of convection just
starting to developed across western New York and will likely
line up with approaching convective line associated with
upstream cold front moving in from southern Ontario over the
next hour or two. With plenty of instability present will
continue to see thunderstorm coverage increase through the rest
of the afternoon, eventually evolving into an east-west oriented
line that will move to the south/southeast across the area into
the early evening.
18z Buffalo sounding showing about 45 knots of 0-6 km shear
which should support at least some risk for the development of
severe storms and possibly some supercells capable of producing
some damaging winds, and some large hail before the line pushes
south into northern Pennsylvania by the late afternoon/early
evening. Bowing line segments will also be possible, producing
wind damage along the leading edge of the main convective line.
Thunderstorms, and thus the severe threat will end this evening
leaving some showers at times, mainly up until midnight before
a weak surface low tracks southeast of the area. A weak surface
boundary/front will remain draped across the southern portion of
the area, leaving some chances for showers near the NY/PA line
through the night. Low temperatures will be in the mid 60s south
of Lake Ontario and in the mid 50s east of Lake Ontario.
Friday, a brief break in precipitation is expected for most of the
area, except the Western Southern Tier, where some showers are
expected to continue from overnight. The frontal boundary south of
the area will slowly lift back north as a warm front. As the front
lifts north, a few shortwave troughs will drop southeast out of the
Great Lakes, helping to expand shower coverage. As the warm front
moves through, some increased instability will be present, allowing
for some thunderstorms within these areas. High temperatures on
Friday will be in the mid 70s for the North Country and in the upper
70s to near 80 elsewhere.
&&
.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/...
Friday night and Saturday, shower coverage will expand and fill
in as a surface low approaches the area and a surge in moisture
pushes north into the region. PWATs will start to increase
Friday afternoon and max out around 2.00 inches Friday night and
Saturday morning. Part of this surge in moisture is the far
northern extent of the moisture shield from Hurricane Laura as
the system tracks across the Tennessee Valley and becomes extra
tropical within a developing low amplitude trough over the
eastern third of the country. Showers with periods of heavy
rainfall will push across the area Friday night into Saturday
morning. Some thunderstorms will also be possible with CAPE
values increasing to around 1,000 J/kg, to as much as 1,500
J/kg. Showers and thunderstorms will shift east as the sfc low
tracks east and its associated cold front moves through Saturday
afternoon. Rainfall amounts for Friday night into Saturday
should generally be in the 1.00-2.00 inch range with some
locally heavier amounts to 3.00 inches possible with any heavier
rainfall within thunderstorms. Temperatures Friday night will
be in the upper 50s to mid 60s. High temperatures on Saturday
will be in the mid to upper 70s.
Saturday night, showers and storms will continue to shift east as
the area of low pressure and cold front track east. A few showers
and thunderstorms will linger through the night, with precip
potential decreasing through the night from west to east.
Temperatures on Saturday night will be in the low to upper 50s.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
High pressure will build into the region for Sunday and Monday,
bringing dry weather, and cooler temperatures, especially for
Sunday. Highs on Sunday will be in the mid 60s to near 70, with
some low 60s possible for the Tug Hill. Monday, temperatures
will warm some to the mid and upper 70s for areas south of Lake
Ontario and to the mid 60s to near 70 for the North Country.
Lows Sunday and Monday night will generally be in the mid 40s
across the higher terrain to the mid and upper 50s for areas
closer to the lakes and in the lower elevations.
Shower potential will increase on Tuesday as an area of low pressure
and associated warm front approaches the region. Showers will
continue through the rest of the period as the sfc low and
associated fronts tracks through the area. Temperatures will warm to
the low 70s to near 80 for Tuesday and Wednesday. Temperatures will
warm slightly for Thursday with highs in the mid 70s to mid 80s.
&&
.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
A warm front across central NY will meander back southward this
afternoon into the early evening. Storms will develop along the
boundary this afternoon and evening along and south of the I-90
corridor, with the potential to produce strong gusty winds and
hail, along with heavy rain producing intermittent reductions to
IFR/MVFR in heavier showers and storms. Otherwise VFR flight
conditions expected for much of the area south of Lake Ontario
through the period. MVFR ceilings may hang on this afternoon
right through this evening for areas east of Lake Ontario.
Outlook...
Tonight through Saturday...Mainly VFR. Expect areas of IFR/MVFR
in periodic showers and thunderstorms.
Sunday through Tuesday...VFR.
&&
.MARINE...
A frontal boundary across eastern Lake Ontario will remain in
place into this evening with brisk southwest winds over Lake
Erie and western Lake Ontario where Small Craft Advisories
remain in effect through the late afternoon and evening.
Some strong thunderstorms will be possible this afternoon into the
early evening across Lake Erie ahead of a southward moving cold
front, bringing the possibility for special marine warning winds and
possibly some hail.
Winds will subside tonight, with much calmer conditions on the lakes
for the end of the week. However, showers and storms will once again
be on the increase from southwest to northeast during the day on
Friday.
&&
.BUF WATCHES/WARNINGS/ADVISORIES...
NY...Beach Hazards Statement until midnight EDT tonight for NYZ010-
019-085.
MARINE...Small Craft Advisory until 5 PM EDT this afternoon for LEZ020.
Small Craft Advisory until midnight EDT tonight for LEZ040-
041.
Small Craft Advisory until 5 PM EDT this afternoon
for LOZ042.
&&
SYNOPSIS...Fries/JM/TMA
NEAR TERM...JM/TMA
SHORT TERM...SW
LONG TERM...SW
AVIATION...JM/TMA
MARINE...JM/TMAHazardous weather outlook, Aug 27, 2:52 PM EDT, 1 hour 36 minutes before
Hazardous Weather Outlook National Weather Service Buffalo NY 252 PM EDT Thu Aug 27 2020 NYZ005-011>014-020-021-281900- Northern Cayuga-Genesee-Wyoming-Livingston-Ontario-Cattaraugus- Allegany- 252 PM EDT Thu Aug 27 2020 ...SEVERE THUNDERSTORM WATCH 456 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for portions of western and north central New York. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .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 NYZ001>004-006-281900- Niagara-Orleans-Monroe-Wayne-Oswego- 252 PM EDT Thu Aug 27 2020 This Hazardous Weather Outlook is for portions of western and north central New York. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .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 NYZ010-019-085-281900- Northern Erie-Chautauqua-Southern Erie- 252 PM EDT Thu Aug 27 2020 ...SEVERE THUNDERSTORM WATCH 456 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...BEACH HAZARDS STATEMENT IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... This Hazardous Weather Outlook is for portions of western New York. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Beach Hazards Statement. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .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 NYZ007-008-281900- Jefferson-Lewis- 252 PM EDT Thu Aug 27 2020 This Hazardous Weather Outlook is for portions of central New York. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .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 LOZ042>044-062>064-281900- 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 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- 252 PM EDT Thu Aug 27 2020 This Hazardous Weather Outlook is for portions of Lake Ontario. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .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-LOZ030-281900- 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- 252 PM EDT Thu Aug 27 2020 ...SEVERE THUNDERSTORM WATCH 456 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for portions of Lake Erie and Lake Ontario. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .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 LOZ045-065-281900- Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence River- Lake Ontario open waters from Mexico Bay to the Saint Lawrence River- 252 PM EDT Thu Aug 27 2020 This Hazardous Weather Outlook is for portions of Lake Ontario. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .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 SLZ022-024-281900- Saint Lawrence River from Cape Vincent to Ogdensburg- Saint Lawrence River from Ogdensburg to Saint Regis- 252 PM EDT Thu Aug 27 2020 This Hazardous Weather Outlook is for the New York waters of the Saint Lawrence River. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .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
In the hours before
Special weather statement, Aug 27, 2:26 PM EDT, 2 hours 2 minutes before
Special Weather Statement National Weather Service Buffalo NY 226 PM EDT Thu Aug 27 2020 NYZ003-010>013-271900- Livingston-Wyoming-Genesee-Monroe-Northern Erie- 226 PM EDT Thu Aug 27 2020 ...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WYOMING...EASTERN ERIE...NORTHWESTERN LIVINGSTON...SOUTHWESTERN MONROE AND GENESEE COUNTIES... At 225 PM EDT, a strong thunderstorm was located near Pembroke, or near Darien Lakes State Park, moving east at 50 mph. Winds in excess of 40 mph and half inch hail are possible with this storm. Locations impacted include... Batavia, Darien Lakes State Park, Le Roy, Pembroke, Perry, Akron, Attica, Pavilion, Caledonia, Oakfield, York, Stafford, Alabama, Covington, Corfu, Elba, Alexander, Wyoming, East Bethany and Perry Center. This includes Interstate 90 between exits 48A and 47. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. LAT...LON 4295 7853 4313 7840 4300 7780 4270 7797 TIME...MOT...LOC 1825Z 291DEG 44KT 4300 7837 HSK
Special weather statement, Aug 27, 2:29 PM EDT, 1 hour 59 minutes before
Special Weather Statement
National Weather Service Buffalo NY
229 PM EDT Thu Aug 27 2020
NYZ003-004-013-014-271930-
Ontario-Livingston-Wayne-Monroe-
229 PM EDT Thu Aug 27 2020
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN WAYNE...
NORTHEASTERN LIVINGSTON...SOUTHERN MONROE AND ONTARIO COUNTIES...
At 228 PM EDT, a strong thunderstorm was located over Henrietta, or
near Chili, moving east at 50 mph.
Winds in excess of 40 mph and half inch hail are possible with this
storm.
Locations impacted include...
Rochester, Chili, Geneva, Canandaigua, East Rochester, Fairport,
Brighton, Gates-North Gates, Henrietta, Newark, Spencerport, Palmyra,
Victor, Honeoye Falls, Bristol, Lima, Clifton Springs, Scottsville,
Phelps and Churchville.
This includes the following highways...
Interstate 390 between exits 11 and 12.
Interstate 90 between exits 46 and 42.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
LAT...LON 4302 7791 4304 7791 4304 7795 4313 7791
4314 7793 4321 7792 4301 7696 4287 7696
4286 7698 4276 7697 4276 7724
TIME...MOT...LOC 1828Z 291DEG 44KT 4306 7766
HSKSpecial weather statement, Aug 27, 2:51 PM EDT, 1 hour 37 minutes before
Special Weather Statement National Weather Service Buffalo NY 251 PM EDT Thu Aug 27 2020 NYZ001-010-011-271915- Genesee-Niagara-Northern Erie- 251 PM EDT Thu Aug 27 2020 ...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN ERIE...SOUTHEASTERN NIAGARA AND NORTHWESTERN GENESEE COUNTIES... At 251 PM EDT, a strong thunderstorm was located over Akron, or near Clarence, moving east at 45 mph. Winds in excess of 40 mph are possible with this storm. Locations impacted include... Clarence, Pembroke, Akron, Alabama, Wolcottsville and Clarence Center. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. A Severe Thunderstorm Watch remains in effect until 800 PM EDT for western New York. LAT...LON 4299 7869 4312 7856 4310 7835 4292 7847 TIME...MOT...LOC 1851Z 278DEG 37KT 4302 7849 HSK
Local storm report, Aug 27, 3:41 PM EDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
341 PM EDT THU AUG 27 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM HAIL 1 NE LIVONIA 42.83N 77.65W
08/27/2020 M2.00 INCH LIVINGSTON NY TRAINED SPOTTER
&&
EVENT NUMBER BUF2000963
KRALocal storm report, Aug 27, 3:49 PM EDT, 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
349 PM EDT THU AUG 27 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0257 PM TSTM WND DMG 1 NNE MENDON CENTER 43.01N 77.55W
08/27/2020 MONROE NY LAW ENFORCEMENT
TREES DOWN ON MENDON CENTER RD AND ALSO ON CANFIELD RD.
&&
EVENT NUMBER BUF2000964
KRALocal storm report, Aug 27, 3:53 PM EDT, 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
353 PM EDT THU AUG 27 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0304 PM TSTM WND DMG 1 SSE SCOTTSVILLE 43.01N 77.75W
08/27/2020 MONROE NY LAW ENFORCEMENT
TREES DOWN ON RT 251.
&&
EVENT NUMBER BUF2000965
KRAThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 9:57 PM EDT | Beach Hazards Statement | BUF | Chautauqua, Erie | 24 hr |
| Aug 27, 12:35 AM EDT | Special Marine Warning | BUF | 40 min | |
| Aug 27, 1:12 AM EDT | Special Weather Statement | BUF | Erie | 33 min |
| Aug 27, 6:03 AM EDT | Special Marine Warning | BUF | 57 min | |
| Aug 27, 6:58 AM EDT | Special Marine Warning | BUF | 62 min | |
| Aug 27, 7:10 AM EDT | Special Weather Statement | BUF | Wayne | 65 min |
| Aug 27, 10:10 AM EDT | Special Weather Statement | BUF | Oswego | 35 min |
| Aug 27, 10:28 AM EDT | Special Weather Statement | BUF | Wayne | 47 min |
| Aug 27, 11:15 AM EDT | Special Weather Statement | BUF | Wayne | 30 min |
| Aug 27, 2:26 PM EDT | Special Weather Statement | BUF | Genesee | 34 min |
| Aug 27, 2:29 PM EDT | Special Weather Statement | BUF | Ontario | 61 min |
| Aug 27, 2:31 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Livingston, Monroe, Wyoming | 59 min |
| Aug 27, 2:41 PM EDT | Severe Thunderstorm Warning | BUF | Monroe, Ontario, Wayne | 64 min |
| Aug 27, 2:51 PM EDT | Special Weather Statement | BUF | Genesee | 24 min |
| Aug 27, 2:55 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Niagara | 20 min |
| Aug 27, 3:02 PM EDT | Severe Thunderstorm Warning | BUF | Livingston, Ontario | 58 min |
| Aug 27, 3:16 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Niagara | 29 min |
| Aug 27, 3:27 PM EDT | Special Marine Warning | BUF | 63 min | |
| Aug 27, 3:29 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Livingston, Wyoming | 61 min |
| Aug 27, 3:52 PM EDT | Severe Thunderstorm Warning | BUF | Livingston, Monroe, Ontario | 68 min |
| Aug 27, 4:01 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua, Erie, Wyoming | 51 min |
| Aug 27, 4:06 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua | 54 min |
| Aug 27, 4:12 PM EDT | Special Marine Warning | BUF | 33 min | |
| Aug 27, 4:12 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Wyoming | 48 min |
| Aug 27, 4:48 PM EDT | Flash Flood Warning | BUF | Genesee, Livingston, Monroe | 4 hr |
| Aug 27, 4:59 PM EDT | Severe Thunderstorm Warning | BUF | Livingston, Monroe, Ontario | 46 min |
| Aug 27, 5:03 PM EDT | Small Craft Advisory | BUF | 3 hr | |
| Aug 27, 5:17 PM EDT | Special Weather Statement | BUF | Cattaraugus | 28 min |
| Aug 27, 5:30 PM EDT | Flash Flood Warning | BUF | Livingston, Ontario | 3 hr |
| Aug 27, 6:11 PM EDT | Special Weather Statement | BUF | Wayne | 49 min |
| Aug 27, 6:54 PM EDT | Special Weather Statement | BUF | Ontario | 36 min |
Nearby
Severe Thunderstorm Warnings in New York, 2020Every severe thunderstorm warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.