Alert archive / New York / Frost Advisories in 2021

Frost Advisory 5, NWS Buffalo, NY

May 15, 2021Lewis County, New York

NWS Buffalo, NY issued this frost advisory at May 15, 2021, 2:49 PM EDT for Lewis County, New York. It took effect at May 16, 2021, 2:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
May 15, 2021, 2:49 PM EDT (18:49 UTC)
In effect from
May 16, 2021, 2:00 AM EDT
Expired
May 16, 2021, 7:57 AM EDT
In force
6 hr
Issued by
NWS Buffalo, NY

County Lewis County, NY

The radar

The Ft Drum radar (KTYX), 19 km from the middle of the area, began a volume at 18:49 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

Albany, NY (KALY), launched 12:00Z, 6.8 hours before the alert went out and 179 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2021-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2021-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -45 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2486 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
-14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

880 
WWUS71 KBUF 151849
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
249 PM EDT Sat May 15 2021

NYZ008-160300-
/O.NEW.KBUF.FR.Y.0005.210516T0600Z-210516T1200Z/
Lewis-
Including the city of Lowville
249 PM EDT Sat May 15 2021

...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT SUNDAY...

* WHAT...Temperatures in the mid 30s will result in areas of 
  frost.

* WHERE...Lewis county.

* WHEN...From 2 AM to 8 AM EDT Sunday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Apffel
3 follow-up statements
027 
WWUS71 KBUF 160241
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
1041 PM EDT Sat May 15 2021

NYZ008-161045-
/O.CON.KBUF.FR.Y.0005.210516T0600Z-210516T1200Z/
Lewis-
Including the city of Lowville
1041 PM EDT Sat May 15 2021

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM EDT
SUNDAY...

* WHAT...Temperatures in the lower 30s will result in frost 
  formation.

* WHERE...Lewis county.

* WHEN...From 2 AM to 8 AM EDT Sunday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
629 
WWUS71 KBUF 160804
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
404 AM EDT Sun May 16 2021

NYZ008-161200-
/O.CON.KBUF.FR.Y.0005.000000T0000Z-210516T1200Z/
Lewis-
Including the city of Lowville
404 AM EDT Sun May 16 2021

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

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

* WHERE...Lewis county.

* WHEN...Until 8 AM EDT 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.

&&

$$

TMA
877 
WWUS71 KBUF 161157
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
757 AM EDT Sun May 16 2021

NYZ008-161300-
/O.CAN.KBUF.FR.Y.0005.000000T0000Z-210516T1200Z/
Lewis-
Including the city of Lowville
757 AM EDT Sun May 16 2021

...FROST ADVISORY IS CANCELLED...

Temperatures will continue to rise this morning.

$$

Nearby

Frost Advisories in New York, 2021Every 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.