Alert archive / New York / Frost Advisories in 2021

Frost Advisory 7, NWS New York, NY

November 16, 2021Bronx County, Nassau County, New York County, New York; Hudson County, New Jersey

NWS New York, NY issued this frost advisory at Nov 16, 2021, 3:54 AM EST for Bronx County, Nassau County, New York County, New York; Hudson County, New Jersey. It took effect at Nov 17, 2021, 1:00 AM EST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Nov 16, 2021, 3:54 AM EST (08:54 UTC)
In effect from: Nov 17, 2021, 1:00 AM EST
Expired: Nov 17, 2021, 8:00 AM EST
In force: 7 hr
Issued by: NWS New York, NY

Counties Hudson County, NJ, Bronx County, NY, Nassau County, NY, New York County, NY

The radar

The Brookhaven radar (KOKX), 87 km from the middle of the area, began a volume at 08:58 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

Brookhaven, NY (KOKX), launched 00:00Z, 8.9 hours before the alert went out and 87 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: 2 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1360 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

344 
WWUS71 KOKX 160854
NPWOKX

URGENT - WEATHER MESSAGE
National Weather Service New York NY
354 AM EST Tue Nov 16 2021

NYZ074-161700-
/O.UPG.KOKX.FZ.A.0007.211117T0600Z-211117T1300Z/
/O.NEW.KOKX.FZ.W.0008.211117T0600Z-211117T1300Z/
Richmond (Staten Island)-
354 AM EST Tue Nov 16 2021

...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM EST WEDNESDAY...

* WHAT...Subfreezing temperatures as low as 30.

* WHERE...Richmond (Staten Island) County.

* WHEN...From 1 AM to 8 AM EST Wednesday.

* IMPACTS...Frost and freeze conditions will kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

NJZ006-NYZ072-073-179-161700-
/O.NEW.KOKX.FR.Y.0007.211117T0600Z-211117T1300Z/
Hudson-New York (Manhattan)-Bronx-Southern Nassau-
354 AM EST Tue Nov 16 2021

...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM EST WEDNESDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...In New Jersey, Hudson County. In New York, New York 
  (Manhattan), Bronx and Southern Nassau Counties.

* WHEN...From 1 AM to 8 AM EST Wednesday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if left
  uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

4 follow-up statements

050 
WWUS71 KOKX 161048
NPWOKX

URGENT - WEATHER MESSAGE
National Weather Service New York NY
548 AM EST Tue Nov 16 2021

NYZ074-162200-
/O.CON.KOKX.FZ.W.0008.211117T0600Z-211117T1300Z/
Richmond (Staten Island)-
548 AM EST Tue Nov 16 2021

...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM EST
WEDNESDAY...

* WHAT...Subfreezing temperatures as low as 30.

* WHERE...Richmond (Staten Island) County.

* WHEN...From 1 AM to 8 AM EST Wednesday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

NJZ006-NYZ072-073-179-162200-
/O.CON.KOKX.FR.Y.0007.211117T0600Z-211117T1300Z/
Hudson-New York (Manhattan)-Bronx-Southern Nassau-
548 AM EST Tue Nov 16 2021

...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM EST
WEDNESDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...In New Jersey, Hudson County. In New York, New York 
  (Manhattan), Bronx and Southern Nassau Counties.

* WHEN...From 1 AM to 8 AM EST Wednesday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

882 
WWUS71 KOKX 161919
NPWOKX

URGENT - WEATHER MESSAGE
National Weather Service Upton NY
Issued by National Weather Service Boston/Norton MA
219 PM EST Tue Nov 16 2021

NYZ074-171000-
/O.CON.KOKX.FZ.W.0008.211117T0600Z-211117T1300Z/
Richmond (Staten Island)-
219 PM EST Tue Nov 16 2021

...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM EST
WEDNESDAY...

* WHAT...Subfreezing temperatures as low as 30.

* WHERE...Richmond (Staten Island) County.

* WHEN...From 1 AM to 8 AM EST Wednesday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

NJZ006-NYZ072-073-179-171000-
/O.CON.KOKX.FR.Y.0007.211117T0600Z-211117T1300Z/
Hudson-New York (Manhattan)-Bronx-Southern Nassau-
219 PM EST Tue Nov 16 2021

...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM EST
WEDNESDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation. 

* WHERE...In New Jersey, Hudson County. In New York, New York 
  (Manhattan), Bronx and Southern Nassau Counties. 

* WHEN...From 1 AM to 8 AM EST Wednesday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

129 
WWUS71 KOKX 170915
NPWOKX

URGENT - WEATHER MESSAGE
National Weather Service New York NY
415 AM EST Wed Nov 17 2021

NYZ074-171300-
/O.CON.KOKX.FZ.W.0008.000000T0000Z-211117T1300Z/
Richmond (Staten Island)-
415 AM EST Wed Nov 17 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING...

* WHAT...Temperatures in the lower 30s.

* WHERE...Richmond (Staten Island) County.

* WHEN...Until 8 AM EST this morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

NJZ006-NYZ072-073-179-171300-
/O.CON.KOKX.FR.Y.0007.000000T0000Z-211117T1300Z/
Hudson-New York (Manhattan)-Bronx-Southern Nassau-
415 AM EST Wed Nov 17 2021

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING...

* WHAT...Temperatures in the low to mid 30s will result in frost 
  formation.

* WHERE...In New Jersey, Hudson County. In New York, New York 
  (Manhattan), Bronx and Southern Nassau Counties.

* WHEN...Until 8 AM EST this morning.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

921 
WWUS71 KOKX 171326
NPWOKX

URGENT - WEATHER MESSAGE
National Weather Service New York NY
826 AM EST Wed Nov 17 2021

NYZ074-171430-
/O.EXP.KOKX.FZ.W.0008.000000T0000Z-211117T1300Z/
Richmond (Staten Island)-
826 AM EST Wed Nov 17 2021

...FREEZE WARNING HAS EXPIRED...

Temperatures have risen to above freezing, into the upper 30s and
lower 40s. The freeze warning was allowed to expire.

$$

NJZ006-NYZ072-073-179-171430-
/O.EXP.KOKX.FR.Y.0007.000000T0000Z-211117T1300Z/
Hudson-New York (Manhattan)-Bronx-Southern Nassau-
826 AM EST Wed Nov 17 2021

...FROST ADVISORY HAS EXPIRED...

Temperatures have risen into the lower 40s and frost formation is
no longer expected. The frost advisory was allowed to expire.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 16, 3:54 AM EST	Freeze Warning	OKX	Richmond	28 hr

Nearby

Frost Advisories in New York, 2021 Frost Advisories in New Jersey, 2021 Every frost advisory 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.