Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 115, NWS Albany, NY

July 17, 2021Dutchess County, New York; Northwest Hills Planning Region, Connecticut

NWS Albany, NY issued this severe thunderstorm warning at Jul 17, 2021, 8:40 PM EDT for Dutchess County, New York; Northwest Hills Planning Region, Connecticut. It was in force for 65 min. 3 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, 8:40 PM EDT (00:40 UTC)
Expired: Jul 17, 2021, 9:45 PM EDT
In force: 65 min
Issued by: NWS Albany, NY
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Northwest Hills Planning Region, CT, Dutchess County, NY

The radar

The Albany radar (KENX), 108 km from the middle of the area, began a volume at 00:42 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, 8:41 PM EDT	TSTM WND DMG	4 Ssw Millbrook, NY	TREES AND WIRES DOWN.
Jul 17, 8:46 PM EDT	TSTM WND DMG	4 Ne Lagrange, NY	TREES AND WIRES DOWN.
Jul 17, 8:50 PM EDT	TSTM WND DMG	3 Ssw Wingdale, NY	TREE DOWNED ON ROUTE 22 NEAR PAWLING

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 17, 1:13 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.7 hours before the alert went out and 108 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: 1431 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

185 
WUUS51 KALY 180040
SVRALY
CTC005-NYC027-180145-
/O.NEW.KALY.SV.W.0115.210718T0040Z-210718T0145Z/

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

The National Weather Service in Albany has issued a

* Severe Thunderstorm Warning for...
  Northwestern Litchfield County in northern Connecticut...
  Southeastern Dutchess County in east central New York...

* Until 945 PM EDT.

* At 840 PM EDT, a severe thunderstorm was located near Dover Plains,
  or 9 miles north of Pawling, moving northeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Dover Plains around 850 PM EDT.
  Kent around 855 PM EDT.
  Amenia around 905 PM EDT.
  Sharon and Cornwall Bridge around 915 PM EDT.
  Falls Village around 935 PM EDT.
  Torrington around 945 PM EDT.

Other locations impacted by this severe thunderstorm include
Cornwall, West Torrington, South Canaan, South Dover, Lithgow, Kelly
Corner, Hoxie Corner, West Goshen, Skiff Mountain and Wrightville.

Please report hail size...damaging winds and reports of trees down to
the National Weather Service by email at Alb.Stormreport@noaa.gov...
On Facebook at www.facebook.com/nwsalbany or twitter @nwsalbany

LAT...LON 4157 7367 4178 7379 4203 7335 4181 7310
      4165 7349 4166 7349 4167 7352 4163 7352
TIME...MOT...LOC 0040Z 232DEG 21KT 4170 7361 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Frugis

2 follow-up statements

374 
WWUS51 KALY 180121
SVSALY

Severe Weather Statement
National Weather Service Albany NY
921 PM EDT Sat Jul 17 2021

NYC027-180130-
/O.CAN.KALY.SV.W.0115.000000T0000Z-210718T0145Z/
Dutchess NY-
921 PM EDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DUTCHESS COUNTY
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 1100 PM EDT for
northern Connecticut and east central New York.

LAT...LON 4166 7349 4167 7352 4195 7349 4203 7335
      4181 7310 4165 7349
TIME...MOT...LOC 0120Z 233DEG 18KT 4183 7338 

$$

CTC005-180145-
/O.CON.KALY.SV.W.0115.000000T0000Z-210718T0145Z/
Litchfield CT-
921 PM EDT Sat Jul 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR NORTHWESTERN LITCHFIELD COUNTY...

At 920 PM EDT, a severe thunderstorm was located over Cornwall
Bridge, or 12 miles west of Torrington, moving northeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

This severe storm will be near...
  Falls Village around 940 PM EDT.
  Torrington around 955 PM EDT.

Other locations impacted by this severe thunderstorm include
Cornwall, West Torrington, South Canaan, Kelly Corner, West Goshen,
Skiff Mountain, Wrightville, Salisbury, North Kent and Bulls Bridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4166 7349 4167 7352 4195 7349 4203 7335
      4181 7310 4165 7349
TIME...MOT...LOC 0120Z 233DEG 18KT 4183 7338 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Frugis

780 
WWUS51 KALY 180146
SVSALY

Severe Weather Statement
National Weather Service Albany NY
946 PM EDT Sat Jul 17 2021

CTC005-180155-
/O.EXP.KALY.SV.W.0115.000000T0000Z-210718T0145Z/
Litchfield CT-
946 PM EDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LITCHFIELD COUNTY
HAS EXPIRED...
                
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 has been allowed to expire.  However heavy
rain is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Connecticut and east central New York.

LAT...LON 4166 7349 4167 7352 4195 7349 4203 7335
      4181 7310 4165 7349
TIME...MOT...LOC 0145Z 232DEG 21KT 4192 7323 

$$

Frugis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 8:04 PM EDT	Special Weather Statement	ALY	Dutchess	26 min
Jul 17, 8:12 PM EDT	Flash Flood Warning	ALY	Dutchess	3 hr
Jul 17, 8:32 PM EDT	Special Weather Statement	ALY	Dutchess	28 min
Jul 17, 8:48 PM EDT	Special Weather Statement	ALY	Ulster	27 min
Jul 17, 8:57 PM EDT	Areal Flood Advisory	ALY	Columbia	3 hr
Jul 17, 9:23 PM EDT	Areal Flood Advisory	ALY	Rensselaer	3 hr
Jul 17, 10:03 PM EDT	Areal Flood Advisory	ALY	Columbia, Dutchess	117 min
Jul 17, 10:35 PM EDT	Areal Flood Advisory	ALY	Albany, Rensselaer, Saratoga, Schenectady	115 min
Jul 17, 11:18 PM EDT	Areal Flood Advisory	ALY	Dutchess	117 min
Jul 18, 5:29 AM EDT	Areal Flood Advisory	ALY	Herkimer	96 min
Jul 18, 3:59 PM EDT	Areal Flood Advisory	ALY	Columbia	3 hr
Jul 18, 4:06 PM EDT	Areal Flood Advisory	ALY	Greene, Schoharie	6 hr
Jul 18, 4:49 PM EDT	Flash Flood Warning	ALY	Columbia	3 hr
Jul 18, 5:27 PM EDT	Areal Flood Advisory	ALY	Columbia	3 hr
Jul 17, 9:12 PM EDT	Areal Flood Advisory	ALY	Northwest Hills Planning Region	3 hr
Jul 17, 9:23 PM EDT	Special Weather Statement	ALY		37 min
Jul 17, 9:47 PM EDT	Special Weather Statement	ALY		28 min
Jul 17, 10:46 PM EDT	Flash Flood Warning	ALY	Northwest Hills Planning Region	2 hr
Jul 17, 11:33 PM EDT	River Flood Warning	ALY	Northwest Hills Planning Region	21 days
Jul 18, 12:28 AM EDT	Special Weather Statement	ALY		32 min
Jul 18, 1:02 AM EDT	Flash Flood Warning	ALY	Northwest Hills Planning Region	3 hr
Jul 18, 2:06 AM EDT	River Flood Warning	ALY	Northwest Hills Planning Region	4 days
Jul 18, 8:16 AM EDT	River Flood Warning	ALY	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	26 hr

Nearby

Severe Thunderstorm Warnings in New York, 2021 Severe Thunderstorm Warnings in Connecticut, 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.