Alert archive / Illinois / Freeze Watches in 2012

Freeze Watch 3, NWS Lincoln, IL

September 22, 2012Fulton County, Knox County, Stark County, Illinois

NWS Lincoln, IL issued this freeze watch at Sep 22, 2012, 3:03 AM CDT for Fulton County, Knox County, Stark County, Illinois. It took effect at Sep 23, 2012, 1:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Sep 22, 2012, 3:03 AM CDT (08:03 UTC)
In effect from
Sep 23, 2012, 1:00 AM CDT
Expired
Sep 22, 2012, 3:22 PM CDT
In force
Issued by
NWS Lincoln, IL

Counties Fulton County, IL, Knox County, IL, Stark County, IL

The radar

The Quad Cities radar (KDVN), 96 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

Lincoln, IL (KILX), launched 00:00Z, 8.1 hours before the alert went out and 146 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 00:00Z on 2012-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2012-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 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
11 J/kg
Mixed-layer CIN
-153 J/kg
Mixed-layer LCL
1083 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this freeze watch went out at Sep 22, 2:53 AM CDT, 10 minutes earlier.

Area forecast discussion, Sep 22, 2:53 AM CDT, 10 minutes before
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Hazardous weather outlook, Sep 21, 3:25 PM CDT, 11 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
325 PM CDT FRI SEP 21 2012

ILZ027>030-036-040-041-047>051-221200-
CASS-FULTON-KNOX-MARSHALL-MASON-MENARD-MORGAN-PEORIA-SANGAMON-
SCHUYLER-SCOTT-STARK-
325 PM CDT FRI SEP 21 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS.

.DAY ONE...TONIGHT

A LOW PRESSURE SYSTEM WILL PASS FROM WESTERN ILLINOIS TO
SOUTHEASTERN ILLINOIS TONIGHT. A FEW ISOLATED THUNDERSTORMS WILL
BE POSSIBLE THIS EVENING. THE THUNDERSTORMS THAT DEVELOP ARE NOT
EXPECTED TO BE SEVERE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS WILL BE POSSIBLE AGAIN FROM TUESDAY INTO WEDNESDAY
AS THE NEXT SYSTEM MOVES ACROSS THE AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT.

ILZ031-037-038-042>046-052>057-061>063-066>068-071>073-221200-
CHAMPAIGN-CHRISTIAN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DE WITT-
DOUGLAS-EDGAR-EFFINGHAM-JASPER-LAWRENCE-LOGAN-MACON-MCLEAN-
MOULTRIE-PIATT-RICHLAND-SHELBY-TAZEWELL-VERMILION-WOODFORD-
325 PM CDT FRI SEP 21 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS...EAST CENTRAL ILLINOIS AND SOUTHEAST ILLINOIS.

.DAY ONE...TONIGHT

A LOW PRESSURE SYSTEM WILL PASS FROM WESTERN ILLINOIS TO
SOUTHEASTERN ILLINOIS TONIGHT. SCATTERED THUNDERSTORMS WILL BE
POSSIBLE THROUGH THE EVENING HOURS. THERE IS A SLIGHT RISK OF SEVERE
STORMS...WITH THE MAIN THREAT BEING FOR LARGE HAIL WITH SOME
STORMS POSSIBLY PRODUCING DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS WILL BE POSSIBLE AGAIN FROM TUESDAY INTO WEDNESDAY
AS THE NEXT SYSTEM MOVES ACROSS THE AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING.

GOETSCH

In the hours before

Special weather statement, Sep 21, 9:20 PM CDT, 5 hours 43 minutes before
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Local storm report, Sep 22, 2:08 AM CDT, 55 minutes before
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Local storm report, Sep 22, 2:53 AM CDT, 10 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 7:04 PM CDTSpecial Weather StatementILXColes41 min
Sep 21, 7:09 PM CDTSevere Thunderstorm WarningILXColes36 min
Sep 21, 7:47 PM CDTSpecial Weather StatementILXClark28 min
Sep 21, 7:49 PM CDTSevere Thunderstorm WarningILXClark26 min
Sep 21, 9:20 PM CDTSpecial Weather StatementILXLawrence55 min
Sep 22, 3:22 PM CDTFrost AdvisoryILXCass, Champaign, DeWitt, Fulton, Knox, Logan and 15 more17 hr

Nearby

Freeze Watches in Illinois, 2012Every freeze watch 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.