Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 121, NWS Albany, NY

July 20, 20214 counties in New York

NWS Albany, NY issued this severe thunderstorm warning at Jul 20, 2021, 8:17 PM EDT for 4 counties in New York. It was in force for 43 min. 5 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 20, 2021, 8:17 PM EDT (00:17 UTC)
Expired: Jul 20, 2021, 9:00 PM EDT
In force: 43 min
Issued by: NWS Albany, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Fulton County, NY, Montgomery County, NY, Saratoga County, NY, Schenectady County, NY

The radar

The Albany radar (KENX), 37 km from the middle of the area, began a volume at 00:17 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 20, 8:30 PM EDT	TSTM WND DMG	Amsterdam, NY	TREES AND WIRES DOWN.
Jul 20, 8:45 PM EDT	TSTM WND DMG	Scotia, NY	TREE ON A HOUSE IN SCOTIA.
Jul 20, 8:45 PM EDT	TSTM WND DMG	Scotia, NY	TREE AND TREE LIMBS DOWN ON SEVERAL STREETS.
Jul 20, 8:45 PM EDT	TSTM WND DMG	Scotia, NY	TREE AND TREE LIMBS DOWN ON SEVERAL STREETS. WASHINTON AVE, SUNNYSIDE ROAD, FIRST STREET, HOUSTON STREET.
Jul 20, 8:50 PM EDT	TSTM WND DMG	1 Nne Rotterdam, NY	DOWN TREE ON PUTNAM ROAD.

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 20, 3:05 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 0.3 hours before the alert went out and 36 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: 1226 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1198 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

382 
WUUS51 KALY 210017
SVRALY
NYC035-057-091-093-210100-
/O.NEW.KALY.SV.W.0121.210721T0017Z-210721T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Albany NY
817 PM EDT Tue Jul 20 2021

The National Weather Service in Albany has issued a

* Severe Thunderstorm Warning for...
  Central Schenectady County in east central New York...
  Southeastern Fulton County in eastern New York...
  Southwestern Saratoga County in east central New York...
  Southeastern Montgomery County in eastern New York...

* Until 900 PM EDT.

* At 816 PM EDT, a severe thunderstorm was located over Fonda, moving
  east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Schenectady, Rotterdam, Amsterdam, Gloversville, Johnstown, Scotia,
  Fonda, Glenville, Niskayuna, Hagaman, Round Lake, Fort Johnson,
  Tribes Hill, Country Knolls, Rotterdam Junction, Alplaus, East
  Glenville, Burnt Hills, Pattersonville-Rotterdam Junction and
  Malta.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

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 4305 7442 4298 7377 4277 7387 4277 7390
      4288 7447
TIME...MOT...LOC 0016Z 281DEG 33KT 4296 7436 

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

Rathbun

2 follow-up statements

960 
WWUS51 KALY 210042
SVSALY

Severe Weather Statement
National Weather Service Albany NY
842 PM EDT Tue Jul 20 2021

NYC035-210052-
/O.CAN.KALY.SV.W.0121.000000T0000Z-210721T0100Z/
Fulton NY-
842 PM EDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FULTON 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
eastern and east central New York.

LAT...LON 4298 7415 4298 7410 4301 7410 4298 7377
      4277 7387 4277 7390 4283 7419
TIME...MOT...LOC 0042Z 277DEG 30KT 4292 7404 

$$

NYC057-091-093-210100-
/O.CON.KALY.SV.W.0121.000000T0000Z-210721T0100Z/
Schenectady NY-Saratoga NY-Montgomery NY-
842 PM EDT Tue Jul 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR CENTRAL SCHENECTADY...SOUTHWESTERN SARATOGA AND EAST CENTRAL
MONTGOMERY COUNTIES...

At 842 PM EDT, a severe thunderstorm was located over Glenville, or 7
miles northwest of Scotia, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Schenectady, Rotterdam, Scotia, Glenville, Niskayuna, Hagaman, Round
Lake, Country Knolls, Rotterdam Junction, Alplaus, East Glenville,
Burnt Hills, Pattersonville-Rotterdam Junction, Malta, Charlton,
Glenridge, Hoffmans, Harding Crossing, Garrison Manor and Aqueduct.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4298 7415 4298 7410 4301 7410 4298 7377
      4277 7387 4277 7390 4283 7419
TIME...MOT...LOC 0042Z 277DEG 30KT 4292 7404 

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

Rathbun

885 
WWUS51 KALY 210057
SVSALY

Severe Weather Statement
National Weather Service Albany NY
857 PM EDT Tue Jul 20 2021

NYC057-091-093-210107-
/O.EXP.KALY.SV.W.0121.000000T0000Z-210721T0100Z/
Schenectady NY-Saratoga NY-Montgomery NY-
857 PM EDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SCHENECTADY...
SOUTHWESTERN SARATOGA AND EAST CENTRAL MONTGOMERY COUNTIES WILL
EXPIRE AT 900 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

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

LAT...LON 4298 7415 4298 7410 4301 7410 4298 7377
      4277 7387 4277 7390 4283 7419
TIME...MOT...LOC 0057Z 281DEG 33KT 4290 7387 

$$

Rathbun

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:11 PM EDT	Areal Flood Advisory	ALY	Fulton, Saratoga, Schenectady, Warren, Washington	3 hr
Jul 20, 8:12 PM EDT	Special Weather Statement	ALY	Montgomery	33 min
Jul 20, 8:24 PM EDT	Special Weather Statement	ALY	Saratoga, Washington	36 min
Jul 20, 8:31 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Saratoga, Warren, Washington	59 min
Jul 20, 8:39 PM EDT	Areal Flood Advisory	ALY	Montgomery, Schenectady, Schoharie	3 hr
Jul 20, 8:40 PM EDT	Severe Thunderstorm Warning	ALY	Montgomery, Schenectady, Schoharie	50 min
Jul 20, 8:49 PM EDT	Areal Flood Advisory	ALY	Rensselaer, Saratoga, Schenectady, Washington	3 hr
Jul 20, 8:54 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer, Saratoga, Washington	36 min
Jul 20, 9:06 PM EDT	Special Weather Statement	ALY	Albany	39 min
Jul 20, 9:12 PM EDT	Special Weather Statement	ALY	Rensselaer	33 min
Jul 20, 9:24 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer, Washington	51 min
Jul 20, 9:31 PM EDT	Special Weather Statement	ALY	Columbia, Greene	44 min
Jul 20, 9:38 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer	52 min
Jul 20, 9:46 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Rensselaer	59 min
Jul 20, 10:40 PM EDT	Special Weather Statement	ALY	Ulster	50 min
Jul 20, 11:33 PM EDT	Special Weather Statement	ALY	Dutchess	42 min
Jul 20, 11:45 PM EDT	Areal Flood Advisory	ALY	Montgomery, Schenectady, Schoharie	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.