Alert archive / Virginia / Frost Advisories in 2021

Frost Advisory 3, NWS Blacksburg, VA

November 2, 20219 counties in Virginia

NWS Blacksburg, VA issued this frost advisory at Nov 2, 2021, 4:04 AM EDT for 9 counties in Virginia. It took effect at Nov 3, 2021, 2:00 AM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Nov 2, 2021, 4:04 AM EDT (08:04 UTC)
In effect from: Nov 3, 2021, 2:00 AM EDT
Expired: Nov 3, 2021, 10:00 AM EDT
In force: 8 hr
Issued by: NWS Blacksburg, VA

Counties Amherst County, VA, Appomattox County, VA, Bedford County, VA, Buckingham County, VA, Campbell County, VA, City of Lynchburg, VA, City of Roanoke, VA, City of Salem, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 89 km from the middle of the area, began a volume at 08:04 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

Roanoke, VA (KRNK), launched 00:00Z, 8.1 hours before the alert went out and 22 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1688 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

622 
WWUS71 KRNK 020804
NPWRNK

URGENT - WEATHER MESSAGE
National Weather Service Blacksburg VA
404 AM EDT Tue Nov 2 2021

VAZ023-024-021700-
/O.UPG.KRNK.FZ.A.0004.211103T0600Z-211103T1400Z/
/O.NEW.KRNK.FZ.W.0003.211103T0600Z-211103T1400Z/
Botetourt-Rockbridge-
Including the cities of Fincastle, Lexington, and Buena Vista
404 AM EDT Tue Nov 2 2021

...FREEZE WARNING IN EFFECT FROM 2 AM TO 10 AM EDT WEDNESDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected. Areas of
  frost.

* WHERE...Botetourt and Rockbridge Counties.

* WHEN...From 2 AM to 10 AM EDT Wednesday.

* IMPACTS...Frost and freeze conditions will kill crops, other
  sensitive vegetation.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. 

&&

$$

VAZ022-034-035-045>047-021700-
/O.NEW.KRNK.FR.Y.0003.211103T0600Z-211103T1400Z/
Roanoke-Bedford-Amherst-Campbell-Appomattox-Buckingham-
Including the cities of Roanoke, Salem, Bedford, Amherst, 
Lynchburg, and Appomattox
404 AM EDT Tue Nov 2 2021

...FROST ADVISORY IN EFFECT FROM 2 AM TO 10 AM EDT WEDNESDAY...

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

* WHERE...Roanoke, Bedford, Amherst, Campbell, Appomattox and 
  Buckingham Counties.

* WHEN...From 2 AM to 10 AM EDT 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

292 
WWUS71 KRNK 021701
NPWRNK

URGENT - WEATHER MESSAGE
National Weather Service Blacksburg VA
101 PM EDT Tue Nov 2 2021

VAZ023-024-030115-
/O.CON.KRNK.FZ.W.0003.211103T0600Z-211103T1400Z/
Botetourt-Rockbridge-
Including the cities of Fincastle, Lexington, and Buena Vista
101 PM EDT Tue Nov 2 2021

...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT
WEDNESDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected. Areas 
  of frost.

* WHERE...Botetourt and Rockbridge Counties.

* WHEN...From 2 AM to 10 AM EDT Wednesday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

VAZ022-034-035-045>047-030115-
/O.CON.KRNK.FR.Y.0003.211103T0600Z-211103T1400Z/
Roanoke-Bedford-Amherst-Campbell-Appomattox-Buckingham-
Including the cities of Roanoke, Salem, Bedford, Amherst, 
Lynchburg, and Appomattox
101 PM EDT Tue Nov 2 2021

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT
WEDNESDAY...

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

* WHERE...Roanoke, Bedford, Amherst, Campbell, Appomattox and 
  Buckingham Counties.

* WHEN...From 2 AM to 10 AM EDT Wednesday.

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


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

555 
WWUS71 KRNK 021825
NPWRNK

URGENT - WEATHER MESSAGE
National Weather Service Blacksburg VA
225 PM EDT Tue Nov 2 2021

VAZ023-024-030400-
/O.CON.KRNK.FZ.W.0003.211103T0600Z-211103T1400Z/
Botetourt-Rockbridge-
Including the cities of Fincastle, Lexington, and Buena Vista
225 PM EDT Tue Nov 2 2021

...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT
WEDNESDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected. Areas 
  of frost.

* WHERE...Botetourt and Rockbridge Counties.

* WHEN...From 2 AM to 10 AM EDT Wednesday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

VAZ022-034-035-045>047-030400-
/O.CON.KRNK.FR.Y.0003.211103T0600Z-211103T1400Z/
Roanoke-Bedford-Amherst-Campbell-Appomattox-Buckingham-
Including the cities of Roanoke, Salem, Bedford, Amherst, 
Lynchburg, and Appomattox
225 PM EDT Tue Nov 2 2021

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT
WEDNESDAY...

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

* WHERE...Roanoke, Bedford, Amherst, Campbell, Appomattox and 
  Buckingham Counties.

* WHEN...From 2 AM to 10 AM EDT Wednesday.

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


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

481 
WWUS71 KRNK 030223
NPWRNK

URGENT - WEATHER MESSAGE
National Weather Service Blacksburg VA
1023 PM EDT Tue Nov 2 2021

VAZ023-024-031030-
/O.CON.KRNK.FZ.W.0003.211103T0600Z-211103T1400Z/
Botetourt-Rockbridge-
Including the cities of Fincastle, Lexington, and Buena Vista
1023 PM EDT Tue Nov 2 2021

...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT
WEDNESDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected. Areas 
  of frost.

* WHERE...Botetourt and Rockbridge Counties.

* WHEN...From 2 AM to 10 AM EDT Wednesday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

VAZ022-034-035-045>047-031030-
/O.CON.KRNK.FR.Y.0003.211103T0600Z-211103T1400Z/
Roanoke-Bedford-Amherst-Campbell-Appomattox-Buckingham-
Including the cities of Roanoke, Salem, Bedford, Amherst, 
Lynchburg, and Appomattox
1023 PM EDT Tue Nov 2 2021

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT
WEDNESDAY...

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

* WHERE...Roanoke, Bedford, Amherst, Campbell, Appomattox and 
  Buckingham Counties.

* WHEN...From 2 AM to 10 AM EDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

505 
WWUS71 KRNK 030811
NPWRNK

URGENT - WEATHER MESSAGE
National Weather Service Blacksburg VA
411 AM EDT Wed Nov 3 2021

VAZ023-024-031400-
/O.CON.KRNK.FZ.W.0003.000000T0000Z-211103T1400Z/
Botetourt-Rockbridge-
Including the cities of Fincastle, Lexington, and Buena Vista
411 AM EDT Wed Nov 3 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM EDT THIS
MORNING...

* WHAT...Sub-freezing temperatures as low as 30 expected. Areas 
  of frost.

* WHERE...Botetourt and Rockbridge Counties.

* WHEN...Until 10 AM EDT this morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

VAZ022-034-035-045>047-031400-
/O.CON.KRNK.FR.Y.0003.000000T0000Z-211103T1400Z/
Roanoke-Bedford-Amherst-Campbell-Appomattox-Buckingham-
Including the cities of Roanoke, Salem, Bedford, Amherst, 
Lynchburg, and Appomattox
411 AM EDT Wed Nov 3 2021

...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM EDT THIS
MORNING...

* WHAT...Temperatures as low as 33 will result in areas of frost.

* WHERE...Roanoke, Bedford, Amherst, Campbell, Appomattox and 
  Buckingham Counties.

* WHEN...Until 10 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.

&&

$$

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 2, 4:04 AM EDT	Freeze Warning	RNK	Botetourt, Rockbridge, City of Buena Vista, City of Lexington	30 hr

Nearby

Frost Advisories in Virginia, 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.