Alert archive / Illinois / Frost Advisories in 2021

Frost Advisory 3, NWS Lincoln, IL

May 7, 202111 counties in Illinois

NWS Lincoln, IL issued this frost advisory at May 7, 2021, 2:08 PM CDT for 11 counties in Illinois. It took effect at May 8, 2021, 1:00 AM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
May 7, 2021, 2:08 PM CDT (19:08 UTC)
In effect from
May 8, 2021, 1:00 AM CDT
Expired
May 8, 2021, 8:00 AM CDT
In force
7 hr
Issued by
NWS Lincoln, IL

Counties Champaign County, IL, DeWitt County, IL, Knox County, IL, Marshall County, IL, McLean County, IL, Peoria County, IL, Piatt County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 50 km from the middle of the area, began a volume at 19:10 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

Lincoln, IL (KILX), launched 12:00Z, 7.1 hours before the alert went out and 62 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, Lincoln, IL at 12:00Z on 2021-05-07Temperature 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, Lincoln, IL at 12:00Z on 2021-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.1939587897117136Sfc1 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
2067 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

645 
WWUS73 KILX 071908
NPWILX

URGENT - WEATHER MESSAGE
National Weather Service Lincoln IL
208 PM CDT Fri May 7 2021

ILZ030-031-038-045-046-080600-
/O.NEW.KILX.FR.Y.0003.210508T0600Z-210508T1300Z/
Marshall-Woodford-McLean-Champaign-Vermilion-
Including the cities of Lacon, Eureka, Bloomington, Normal, 
Champaign, Urbana, and Danville
208 PM CDT Fri May 7 2021

...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT SATURDAY...

* WHAT...Temperatures as low as 36 will result in frost 
  formation.

* WHERE...Marshall, Woodford, McLean, Champaign and Vermilion 
  Counties.

* WHEN...From 1 AM to 8 AM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

NMB
3 follow-up statements
650 
WWUS73 KILX 080306
NPWILX

URGENT - WEATHER MESSAGE
National Weather Service Lincoln IL
1006 PM CDT Fri May 7 2021


ILZ027>029-037-043-044-081300-
/O.EXA.KILX.FR.Y.0003.210508T0600Z-210508T1300Z/
Knox-Stark-Peoria-Tazewell-De Witt-Piatt-
Including the cities of Galesburg, Toulon, Peoria, Pekin, 
Clinton, and Monticello
1006 PM CDT Fri May 7 2021

...FROST ADVISORY IN EFFECT UNTIL 8 AM CDT SATURDAY...

The National Weather Service in Lincoln has issued a Frost
Advisory, which is in effect until 8 AM CDT Saturday. 

* WHAT...Temperatures as low as 36 will result in frost 
  formation. 

* WHERE...Marshall, Woodford, McLean, Champaign and Vermilion 
  Counties. 

* WHEN...From 1 AM to 8 AM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

ILZ030-031-038-045-046-081300-
/O.CON.KILX.FR.Y.0003.210508T0600Z-210508T1300Z/
Marshall-Woodford-McLean-Champaign-Vermilion-
Including the cities of Lacon, Eureka, Bloomington, Normal, 
Champaign, Urbana, and Danville
1006 PM CDT Fri May 7 2021

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT SATURDAY...

* WHAT...Temperatures as low as 36 will result in frost 
  formation. 

* WHERE...Marshall, Woodford, McLean, Champaign and Vermilion 
  Counties. 

* WHEN...From 1 AM to 8 AM CDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
340 
WWUS73 KILX 080835
NPWILX

URGENT - WEATHER MESSAGE
National Weather Service Lincoln IL
335 AM CDT Sat May 8 2021

ILZ027>031-037-038-043>046-081300-
/O.CON.KILX.FR.Y.0003.000000T0000Z-210508T1300Z/
Knox-Stark-Peoria-Marshall-Woodford-Tazewell-McLean-De Witt-Piatt-
Champaign-Vermilion-
Including the cities of Galesburg, Toulon, Peoria, Lacon, Eureka,
Pekin, Bloomington, Normal, Clinton, Monticello, Champaign, 
Urbana, and Danville
335 AM CDT Sat May 8 2021

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

* WHAT...Temperatures as low as 36 will result in frost 
  formation.

* WHERE...Marshall, Woodford, McLean, Champaign and Vermilion 
  Counties.

* WHEN...until 8 AM CDT today.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
871 
WWUS73 KILX 081242
NPWILX

URGENT - WEATHER MESSAGE
National Weather Service Lincoln IL
742 AM CDT Sat May 8 2021

ILZ027>031-037-038-043>046-081345-
/O.EXP.KILX.FR.Y.0003.000000T0000Z-210508T1300Z/
Knox-Stark-Peoria-Marshall-Woodford-Tazewell-McLean-De Witt-Piatt-
Champaign-Vermilion-
Including the cities of Galesburg, Toulon, Peoria, Lacon, Eureka,
Pekin, Bloomington, Normal, Clinton, Monticello, Champaign, 
Urbana, and Danville
742 AM CDT Sat May 8 2021

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

Temperatures are rising and additional frost is no longer expected
this morning, therefore the frost advisory will be allowed to
expire at 8 AM.

$$

Nearby

Frost Advisories in Illinois, 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.