Alert archive / New York / Frost Advisories in 2021

Frost Advisory 4, NWS Buffalo, NY

May 13, 2021Allegany County, Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this frost advisory at May 13, 2021, 12:57 PM EDT for Allegany County, Cattaraugus County, Chautauqua County, New York. It took effect at May 14, 2021, 12:00 AM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
May 13, 2021, 12:57 PM EDT (16:57 UTC)
In effect from
May 14, 2021, 12:00 AM EDT
Expired
May 14, 2021, 8:00 AM EDT
In force
8 hr
Issued by
NWS Buffalo, NY

Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 76 km from the middle of the area, began a volume at 17:00 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.0 hours before the alert went out and 73 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, Buffalo Intl Airport, NY at 12:00Z on 2021-05-13Temperature 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, Buffalo Intl Airport, NY at 12:00Z on 2021-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.193958Sfc1 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
1782 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

827 
WWUS71 KBUF 131657
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
1257 PM EDT Thu May 13 2021

NYZ019>021-140100-
/O.NEW.KBUF.FR.Y.0004.210514T0400Z-210514T1200Z/
Chautauqua-Cattaraugus-Allegany-
Including the cities of Jamestown, Olean, and Wellsville
1257 PM EDT Thu May 13 2021

...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT
FRIDAY...

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

* WHERE...The western Southern Tier.

* WHEN...From midnight tonight to 8 AM EDT Friday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
3 follow-up statements
895 
WWUS71 KBUF 132323
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
723 PM EDT Thu May 13 2021

NYZ019>021-140730-
/O.CON.KBUF.FR.Y.0004.210514T0400Z-210514T1200Z/
Chautauqua-Cattaraugus-Allegany-
Including the cities of Jamestown, Olean, and Wellsville
723 PM EDT Thu May 13 2021

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM
EDT FRIDAY...

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

* WHERE...The western Southern Tier.

* WHEN...From midnight tonight to 8 AM EDT Friday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
967 
WWUS71 KBUF 140524
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
124 AM EDT Fri May 14 2021

NYZ019>021-141200-
/O.CON.KBUF.FR.Y.0004.000000T0000Z-210514T1200Z/
Chautauqua-Cattaraugus-Allegany-
Including the cities of Jamestown, Olean, and Wellsville
124 AM EDT Fri May 14 2021

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

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

* WHERE...The western Southern Tier, mainly in colder valley
  locations.

* 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.

&&

$$

Hitchcock
113 
WWUS71 KBUF 141139
NPWBUF

URGENT - WEATHER MESSAGE
National Weather Service Buffalo NY
739 AM EDT Fri May 14 2021

NYZ019>021-141245-
/O.EXP.KBUF.FR.Y.0004.000000T0000Z-210514T1200Z/
Chautauqua-Cattaraugus-Allegany-
Including the cities of Jamestown, Olean, and Wellsville
739 AM EDT Fri May 14 2021

...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING...

Temperatures will continue to warm 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.