Alert archive / Illinois / Areal Flood Advisories in 2012

Areal Flood Advisory 2, NWS Lincoln, IL

May 6, 2012Marshall County, Stark County, Illinois

NWS Lincoln, IL issued this areal flood advisory at May 6, 2012, 3:46 PM CDT for Marshall County, Stark County, Illinois. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
May 6, 2012, 3:46 PM CDT (20:46 UTC)
Expired
May 6, 2012, 10:00 PM CDT
In force
6 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon

Counties Marshall County, IL, Stark County, IL

The radar

The Lincoln radar (KILX), 103 km from the middle of the area, began a volume at 20:49 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

Davenport, (KDVN), launched 12:00Z, 8.8 hours before the alert went out and 99 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, Davenport, at 12:00Z on 2012-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2361 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, Davenport, at 12:00Z on 2012-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.193958Sfc1 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
2361 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
571 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory 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 areal flood advisory went out at May 6, 3:23 PM CDT, 23 minutes earlier.

Area forecast discussion, May 6, 3:23 PM CDT, 23 minutes before
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Hazardous weather outlook, May 6, 3:32 PM CDT, 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
332 PM CDT SUN MAY 6 2012

ILZ027>031-036>038-040>051-053-071100-
CASS-CHAMPAIGN-DE WITT-FULTON-KNOX-LOGAN-MACON-MARSHALL-MASON-
MCLEAN-MENARD-MORGAN-PEORIA-PIATT-SANGAMON-SCHUYLER-SCOTT-STARK-
TAZEWELL-VERMILION-WOODFORD-
332 PM CDT SUN MAY 6 2012

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

.DAY ONE...TONIGHT

A WARM FRONT IN THE VICINITY THIS EVENING AND AN APPROACHING COLD
FRONT LATER TONIGHT WILL SET THE STAGE FOR PERIODIC THUNDERSTORMS.
THE PRIMARY SEVERE WEATHER THREAT IS EXPECTED THIS EVENING. LARGE
HAIL...DAMAGING WIND GUSTS...AND LOCALLY HEAVY RAINFALL WILL BE
POSSIBLE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE COLD FRONT WILL PUSH EASTWARD ACROSS ILLINOIS ON MONDAY...WITH
SOME THUNDERSTORMS POSSIBLE DURING THE MORNING HOURS.

THUNDERSTORM CHANCES WILL RETURN AGAIN NEXT SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING...PRIMARILY BETWEEN
4 PM AND 8 PM WEST OF INTERSTATE 55...AND BETWEEN 8 PM AND
MIDNIGHT EAST OF INTERSTATE 55.

ILZ052-054>057-061>063-066>068-071>073-071100-
CHRISTIAN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DOUGLAS-EDGAR-
EFFINGHAM-JASPER-LAWRENCE-MOULTRIE-RICHLAND-SHELBY-
332 PM CDT SUN MAY 6 2012

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

.DAY ONE...TONIGHT

A WARM FRONT IN THE VICINITY THIS EVENING AND AN APPROACHING COLD
FRONT LATER TONIGHT WILL SET THE STAGE FOR PERIODIC THUNDERSTORMS.
LARGE HAIL...DAMAGING WIND GUSTS...AND LOCALLY HEAVY RAINFALL WILL
BE POSSIBLE WITH THE STRONGEST STORMS. THROUGH TONIGHT...SEVERE
WEATHER SHOULD REMAIN PRIMARILY WEST OF INTERSTATE 57.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE COLD FRONT WILL PUSH SLOWLY EASTWARD ACROSS ILLINOIS ON
MONDAY...BRINGING THE THREAT FOR MORE THUNDERSTORMS...PRIMARILY
DURING THE MORNING HOURS. SEVERE STORMS ON MONDAY SHOULD BE CONFINED
TO AREAS MAINLY SOUTHEAST OF INTERSTATE 70.

THUNDERSTORM CHANCES WILL RETURN AGAIN NEXT SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED BETWEEN 8 PM AND MIDNIGHT THIS
EVENING.

BAK

In the hours before

Local storm report, May 6, 2:27 PM CDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
227 PM CDT SUN MAY 06 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0223 PM     HAIL             2 NE VICTORIA           41.05N 90.07W
05/06/2012  M0.75 INCH       KNOX               IL   TRAINED SPOTTER

&&

TIMTE

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 2:06 PM CDTSevere Thunderstorm WarningILXKnox, Peoria, Stark54 min
May 6, 2:36 PM CDTTornado WarningILXMarshall, Stark39 min
May 6, 3:07 PM CDTTornado WarningILXMarshall53 min
May 6, 4:03 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion57 min
May 6, 5:00 PM CDTSevere Thunderstorm WarningILXVermilion45 min
May 6, 5:21 PM CDTTornado WarningILXVermilion39 min
May 6, 6:09 PM CDTFlash Flood WarningILXVermilion6 hr
May 6, 6:48 PM CDTSpecial Weather StatementILXVermilion27 min

Nearby

Areal Flood Advisories in Illinois, 2012Every areal flood advisory 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.