Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 182, NWS Binghamton, NY

July 17, 2021Tompkins County, New York

NWS Binghamton, NY issued this severe thunderstorm warning at Jul 17, 2021, 4:30 PM EDT for Tompkins County, New York. It was in force for 45 min. 2 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: Jul 17, 2021, 4:30 PM EDT (20:30 UTC)
Expired: Jul 17, 2021, 5:15 PM EDT
In force: 45 min
Issued by: NWS Binghamton, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Tompkins County, NY

The radar

The Binghamton radar (KBGM), 41 km from the middle of the area, began a volume at 20:33 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.

What was reported inside it

Time	Report	Where	Remark
Jul 17, 4:45 PM EDT	TSTM WND DMG	2 Ene Danby, NY	LARGE TREE DOWN ON ROAD. TIME ESTIMATED BY RADAR.
Jul 17, 5:21 PM EDT	TSTM WND DMG	1 Nne Slaterville Spgs, NY	TREES AND WIRES DOWN ON ROAD. TIME ESTIMATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.5 hours before the alert went out and 197 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 558 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

662 
WUUS51 KBGM 172030
SVRBGM
NYC109-172115-
/O.NEW.KBGM.SV.W.0182.210717T2030Z-210717T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Binghamton NY
430 PM EDT Sat Jul 17 2021

The National Weather Service in Binghamton has issued a

* Severe Thunderstorm Warning for...
  Central Tompkins County in central New York...

* Until 515 PM EDT.

* At 430 PM EDT, a severe thunderstorm was located near Danby, or 9
  miles south of Ithaca, moving northeast at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Ithaca, Newfield, Cayuga Heights, Lansing, Danby, Caroline, Dryden,
  Freeville, Brooktondale and Slaterville Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4258 7633 4252 7626 4241 7625 4240 7629
      4238 7629 4228 7650 4228 7659 4235 7666
TIME...MOT...LOC 2030Z 236DEG 21KT 4231 7654 

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

Kistner

2 follow-up statements

331 
WWUS51 KBGM 172049
SVSBGM

Severe Weather Statement
National Weather Service Binghamton NY
449 PM EDT Sat Jul 17 2021

NYC109-172115-
/O.CON.KBGM.SV.W.0182.000000T0000Z-210717T2115Z/
Tompkins NY-
449 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHEASTERN TOMPKINS COUNTY...

At 449 PM EDT, a severe thunderstorm was located over Brooktondale,
or near Ithaca, moving northeast at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Caroline, Dryden, Freeville, Brooktondale, Slaterville Springs,
Besemer, West Slaterville, Etna, East Ithaca and South Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4246 7642 4254 7629 4252 7626 4241 7625
      4240 7629 4238 7629 4232 7641 4235 7646
      4240 7649
TIME...MOT...LOC 2049Z 236DEG 21KT 4237 7643 

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

Kistner

062 
WWUS51 KBGM 172101
SVSBGM

Severe Weather Statement
National Weather Service Binghamton NY
501 PM EDT Sat Jul 17 2021

NYC109-172115-
/O.CON.KBGM.SV.W.0182.000000T0000Z-210717T2115Z/
Tompkins NY-
501 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR EAST CENTRAL TOMPKINS COUNTY...

At 501 PM EDT, a severe thunderstorm was located over Slaterville
Springs, or 8 miles east of Ithaca, moving northeast at 25 mph.

HAZARD...Golf ball size hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Caroline, Dryden, Slaterville Springs and West Slaterville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

&&

LAT...LON 4248 7638 4252 7626 4241 7625 4240 7629
      4238 7629 4235 7635 4241 7639
TIME...MOT...LOC 2101Z 236DEG 21KT 4241 7635 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...70MPH
 
$$

Kistner

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 9:39 AM EDT	Special Weather Statement	BGM	Schuyler, Steuben, Yates	36 min
Jul 17, 12:42 PM EDT	Special Weather Statement	BGM	Otsego	48 min
Jul 17, 1:29 PM EDT	Special Weather Statement	BGM	Otsego	31 min
Jul 17, 1:32 PM EDT	Areal Flood Advisory	BGM	Otsego	98 min
Jul 17, 2:04 PM EDT	Severe Thunderstorm Warning	BGM	Steuben	56 min
Jul 17, 2:14 PM EDT	Areal Flood Advisory	BGM	Steuben	110 min
Jul 17, 2:27 PM EDT	Tornado Warning	BGM	Steuben	33 min
Jul 17, 2:57 PM EDT	Severe Thunderstorm Warning	BGM	Steuben	48 min
Jul 17, 3:05 PM EDT	Areal Flood Advisory	BGM	Steuben	115 min
Jul 17, 3:20 PM EDT	Areal Flood Advisory	BGM	Delaware, Sullivan	117 min
Jul 17, 3:42 PM EDT	Special Weather Statement	BGM	Schuyler	33 min
Jul 17, 3:50 PM EDT	Areal Flood Advisory	BGM	Delaware	86 min
Jul 17, 3:59 PM EDT	Special Weather Statement	BGM	Delaware	46 min
Jul 17, 4:01 PM EDT	Areal Flood Advisory	BGM	Chemung, Schuyler, Steuben, Tompkins	63 min
Jul 17, 4:16 PM EDT	Special Weather Statement	BGM	Tompkins	29 min
Jul 17, 4:55 PM EDT	Flash Flood Warning	BGM	Delaware, Sullivan	4 hr
Jul 17, 4:57 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Cortland, Tioga, Tompkins	33 min
Jul 17, 5:12 PM EDT	Areal Flood Advisory	BGM	Broome, Chemung, Cortland, Schuyler, Tioga, Tompkins	55 min
Jul 17, 5:21 PM EDT	Special Weather Statement	BGM	Delaware	24 min
Jul 17, 5:23 PM EDT	Severe Thunderstorm Warning	BGM	Broome	67 min
Jul 17, 5:24 PM EDT	Severe Thunderstorm Warning	BGM	Tioga, Tompkins	27 min
Jul 17, 5:28 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Cortland	47 min
Jul 17, 5:36 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Delaware, Otsego	39 min
Jul 17, 6:06 PM EDT	Areal Flood Advisory	BGM	Broome, Chemung, Chenango, Cortland, Tioga	94 min
Jul 17, 6:14 PM EDT	Severe Thunderstorm Warning	BGM	Chenango	31 min
Jul 17, 6:20 PM EDT	Tornado Warning	BGM	Chenango, Otsego	25 min
Jul 17, 6:29 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	28 min
Jul 17, 6:39 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Delaware, Tioga	36 min
Jul 17, 6:59 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Tioga	34 min
Jul 17, 7:06 PM EDT	Areal Flood Advisory	BGM	Broome, Chenango, Delaware, Otsego	2 hr
Jul 17, 7:23 PM EDT	Flash Flood Warning	BGM	Broome, Chenango, Delaware, Otsego	2 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.