Alert archive / Illinois / Frost Advisories in 2016

Frost Advisory 2, NWS Lincoln, IL

October 20, 201610 counties in Illinois

NWS Lincoln, IL issued this frost advisory at Oct 20, 2016, 2:27 PM CDT for 10 counties in Illinois. It took effect at Oct 21, 2016, 4:00 AM CDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Oct 20, 2016, 2:27 PM CDT (19:27 UTC)
In effect from
Oct 21, 2016, 4:00 AM CDT
Expired
Oct 21, 2016, 8:00 AM CDT
In force
4 hr
Issued by
NWS Lincoln, IL

Counties Cass County, IL, Fulton County, IL, Knox County, IL, Marshall County, IL, Mason County, IL, Peoria County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 68 km from the middle of the area, began a volume at 19:27 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, 7.5 hours before the alert went out and 120 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 2016-10-20Temperature 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 2016-10-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -139 square meters per square second.1939587897Sfc1 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
832 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-139 m²/s²
0-3 km storm-relative helicity
-50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

613 
WWUS73 KILX 201927
NPWILX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LINCOLN IL
227 PM CDT THU OCT 20 2016

...FROST LIKELY TONIGHT...

.HIGH PRESSURE WILL BUILD INTO THE MISSISSIPPI RIVER VALLEY
TONIGHT...LEADING TO CLEARING SKIES AND DIMINISHING WINDS ACROSS
WEST-CENTRAL ILLINOIS. AREAS OF FROST WILL DEVELOP AS LOW
TEMPERATURES BOTTOM OUT IN THE MIDDLE TO UPPER 30S.

ILZ027>031-036-037-040-041-047-210900-
/O.NEW.KILX.FR.Y.0002.161021T0900Z-161021T1300Z/
KNOX-STARK-PEORIA-MARSHALL-WOODFORD-FULTON-TAZEWELL-SCHUYLER-
MASON-CASS-
INCLUDING THE CITIES OF...GALESBURG...TOULON...PEORIA...LACON...
EUREKA...CANTON...PEKIN...RUSHVILLE...HAVANA...BEARDSTOWN
227 PM CDT THU OCT 20 2016

...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM CDT FRIDAY...

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 4 AM TO 8 AM CDT FRIDAY.

* TEMPERATURE...OVERNIGHT LOW TEMPERATURES WILL DROP INTO THE
  MIDDLE TO UPPER 30S.

* IMPACTS...FROST IS EXPECTED TO DEVELOP TOWARD DAWN
  FRIDAY...PARTICULARLY ALONG AND WEST OF THE ILLINOIS RIVER.
  SENSITIVE PLANTS SHOULD BE COVERED OR BROUGHT INDOORS IN ORDER
  TO PREVENT DAMAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT WIDESPREAD FROST IS EXPECTED.
SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

BARNES
2 follow-up statements
830 
WWUS73 KILX 210811
NPWILX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LINCOLN IL
311 AM CDT FRI OCT 21 2016

ILZ027>031-036-037-040-041-047-211300-
/O.CON.KILX.FR.Y.0002.161021T0900Z-161021T1300Z/
KNOX-STARK-PEORIA-MARSHALL-WOODFORD-FULTON-TAZEWELL-SCHUYLER-
MASON-CASS-
INCLUDING THE CITIES OF...GALESBURG...TOULON...PEORIA...LACON...
EUREKA...CANTON...PEKIN...RUSHVILLE...HAVANA...BEARDSTOWN
311 AM CDT FRI OCT 21 2016

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

* TEMPERATURE...OVERNIGHT LOW TEMPERATURES WILL DROP INTO THE 
  MIDDLE TO UPPER 30S. 

* IMPACTS...FROST IS EXPECTED TO DEVELOP TOWARD DAWN THIS
  MORNING...PARTICULARLY ALONG AND WEST OF THE ILLINOIS RIVER.
  SENSITIVE VEGETATION MAY BE DAMAGED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT WIDESPREAD FROST IS EXPECTED.
SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$
501 
WWUS73 KILX 211253
NPWILX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LINCOLN IL
753 AM CDT FRI OCT 21 2016

ILZ027>031-036-037-040-041-047-211400-
/O.EXP.KILX.FR.Y.0002.000000T0000Z-161021T1300Z/
KNOX-STARK-PEORIA-MARSHALL-WOODFORD-FULTON-TAZEWELL-SCHUYLER-
MASON-CASS-
INCLUDING THE CITIES OF...GALESBURG...TOULON...PEORIA...LACON...
EUREKA...CANTON...PEKIN...RUSHVILLE...HAVANA...BEARDSTOWN
753 AM CDT FRI OCT 21 2016

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

TEMPERATURES ARE BEGINNING TO WARM WITH SUNRISE...SO THE FROST
ADVISORY WILL BE ALLOWED TO EXPIRE.

$$

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 19, 8:04 PM CDTSpecial Weather StatementILXEffingham, Jasper56 min
Oct 19, 8:24 PM CDTSevere Thunderstorm WarningILXEffingham, Jasper31 min
Oct 19, 9:18 PM CDTAreal Flood AdvisoryILXCumberland, Effingham, Jasper, Shelby3 hr
Oct 20, 3:24 AM CDTAreal Flood AdvisoryILXColes, Cumberland, Douglas, Effingham, Moultrie, Shelby6 hr
Oct 20, 3:31 AM CDTAreal Flood AdvisoryILXClark, Crawford, Cumberland, Effingham, Jasper6 hr

Nearby

Frost Advisories in Illinois, 2016Every frost advisory in 2016

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.