Alert archive / Illinois / Freeze Warnings in 2012

Freeze Warning 4, NWS Lincoln, IL

April 22, 20129 counties in Illinois

NWS Lincoln, IL issued this freeze warning at Apr 22, 2012, 2:37 PM CDT for 9 counties in Illinois. It took effect at Apr 23, 2012, 3:00 AM CDT. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 22, 2012, 2:37 PM CDT (19:37 UTC)
In effect from
Apr 23, 2012, 3:00 AM CDT
Expired
Apr 23, 2012, 7:00 AM CDT
In force
4 hr
Issued by
NWS Lincoln, IL

Counties Champaign County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Marshall County, IL, McLean County, IL, Piatt County, IL, Vermilion County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 69 km from the middle of the area, began a volume at 19:34 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, 7.6 hours before the alert went out and 13 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 2012-04-22Temperature 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 2012-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 square meters per square second.19395878Sfc1 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
1678 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

098 
WWUS73 KILX 221937
NPWILX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LINCOLN IL
237 PM CDT SUN APR 22 2012

...TEMPERATURES NEAR FREEZING EXPECTED LATE TONIGHT...

ILZ030-031-038-043>046-055-057-230130-
/O.NEW.KILX.FZ.W.0004.120423T0800Z-120423T1200Z/
MARSHALL-WOODFORD-MCLEAN-DE WITT-PIATT-CHAMPAIGN-VERMILION-
DOUGLAS-EDGAR-
INCLUDING THE CITIES OF...BLOOMINGTON...NORMAL...CHAMPAIGN...
URBANA...DANVILLE
237 PM CDT SUN APR 22 2012

...FREEZE WARNING IN EFFECT FROM 3 AM TO 7 AM CDT MONDAY...

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM 3 AM TO 7 AM CDT MONDAY. 

* TIMING...TEMPERATURES AT OR BELOW FREEZING ARE LIKELY TO OCCUR
  BY 3 AM...AND WILL CONTINUE THROUGH ABOUT 7 AM.

* TEMPERATURES...LOW TEMPERATURES FROM 30 TO 32 DEGREES ARE
  EXPECTED. SOME NORMALLY COLDER SPOTS MAY DIP INTO THE UPPER 20S. 

* IMPACTS...TENDER VEGETATION MAY BE DAMAGED OR KILLED IF NOT
  PROPERLY PROTECTED FROM THE COLD. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$
GEELHART
2 follow-up statements
515 
WWUS73 KILX 230134
NPWILX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LINCOLN IL
834 PM CDT SUN APR 22 2012

...TEMPERATURES NEAR FREEZING EXPECTED LATE TONIGHT...

ILZ030-031-038-043>046-055-057-231200-
/O.CON.KILX.FZ.W.0004.120423T0800Z-120423T1200Z/
MARSHALL-WOODFORD-MCLEAN-DE WITT-PIATT-CHAMPAIGN-VERMILION-
DOUGLAS-EDGAR-
INCLUDING THE CITIES OF...BLOOMINGTON...NORMAL...CHAMPAIGN...
URBANA...DANVILLE
834 PM CDT SUN APR 22 2012

...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 7 AM CDT
MONDAY...

A FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 7 AM CDT MONDAY. 

* TIMING...TEMPERATURES AT OR BELOW FREEZING ARE LIKELY TO OCCUR 
  BY 3 AM...AND WILL CONTINUE THROUGH ABOUT 7 AM. 

* TEMPERATURES...LOW TEMPERATURES FROM 30 TO 32 DEGREES ARE 
  EXPECTED. SOME NORMALLY COLDER SPOTS MAY DIP INTO THE UPPER 
  20S. 

* IMPACTS...TENDER VEGETATION MAY BE DAMAGED OR KILLED IF NOT 
  PROPERLY PROTECTED FROM THE COLD. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$


SHIMON
233 
WWUS73 KILX 231201
NPWILX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LINCOLN IL
701 AM CDT MON APR 23 2012

ILZ030-031-038-043>046-055-057-231315-
/O.EXP.KILX.FZ.W.0004.000000T0000Z-120423T1200Z/
MARSHALL-WOODFORD-MCLEAN-DE WITT-PIATT-CHAMPAIGN-VERMILION-
DOUGLAS-EDGAR-
INCLUDING THE CITIES OF...BLOOMINGTON...NORMAL...CHAMPAIGN...
URBANA...DANVILLE
701 AM CDT MON APR 23 2012

...FREEZE WARNING HAS EXPIRED...

THE FREEZE WARNING IS NO LONGER IN EFFECT. 


$$


BAK

Nearby

Freeze Warnings in Illinois, 2012Every freeze warning in 2012

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.