Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 45, NWS Buffalo, NY

July 1, 2021Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 1, 2021, 7:49 AM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 1, 2021, 7:49 AM EDT (11:49 UTC)
Expired: Jul 1, 2021, 8:45 AM EDT
In force: 56 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 98 km from the middle of the area, began a volume at 11:52 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 00:00Z, 11.8 hours before the alert went out and 97 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 31 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 976 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

263 
WUUS51 KBUF 011149
SVRBUF
NYC009-013-011245-
/O.NEW.KBUF.SV.W.0045.210701T1149Z-210701T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
749 AM EDT Thu Jul 1 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cattaraugus County in western New York...
  Southeastern Chautauqua County in western New York...

* Until 845 AM EDT..

* At 749 AM EDT, a severe thunderstorm was located near Falconer, or
  near Jamestown and moving east at 25 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...
  Jamestown, Salamanca, Allegany State Park, Lakewood, Falconer,
  Jamestown West, Frewsburg, Gerry, Conewango and Ellington.

 This includes Interstate 86 between exits 11 and 20.
 
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 4200 7911 4208 7942 4226 7925 4225 7869
      4200 7883
TIME...MOT...LOC 1149Z 283DEG 20KT 4215 7925 

HAIL...1.00IN
WIND...60MPH
 
$$

Reynolds

2 follow-up statements

004 
WWUS51 KBUF 011209
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
809 AM EDT Thu Jul 1 2021

NYC009-013-011245-
/O.CON.KBUF.SV.W.0045.000000T0000Z-210701T1245Z/
Cattaraugus NY-Chautauqua NY-
809 AM EDT Thu Jul 1 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 AM EDT
FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES...

At 809 AM EDT, a severe thunderstorm was located near Falconer, or 7
miles east of Jamestown and moving east at 25 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...
Jamestown, Salamanca, Allegany State Park, Falconer, Jamestown West,
Frewsburg, Conewango, Ellington, Randolph and Napoli.

 This includes Interstate 86 between exits 12 and 20.
 
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 4206 7933 4225 7914 4225 7869 4200 7883
      4200 7911
TIME...MOT...LOC 1209Z 283DEG 20KT 4212 7910 

HAIL...1.00IN
WIND...60MPH
 
$$

Reynolds

111 
WWUS51 KBUF 011237
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
837 AM EDT Thu Jul 1 2021

NYC009-013-011247-
/O.EXP.KBUF.SV.W.0045.000000T0000Z-210701T1245Z/
Cattaraugus NY-Chautauqua NY-
837 AM EDT Thu Jul 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CATTARAUGUS AND
SOUTHEASTERN CHAUTAUQUA COUNTIES WILL EXPIRE AT 845 AM 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.

LAT...LON 4206 7933 4225 7914 4225 7869 4200 7883
      4200 7911
TIME...MOT...LOC 1237Z 283DEG 20KT 4209 7891 

$$

Reynolds

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 7:45 AM EDT	Special Weather Statement	BUF	Chautauqua	60 min
Jul 1, 3:24 PM EDT	Special Marine Warning	BUF		66 min
Jul 1, 4:11 PM EDT	Special Marine Warning	BUF		76 min
Jul 1, 6:10 PM EDT	Special Marine Warning	BUF		65 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 Every severe thunderstorm warning in 2021

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.