Alert archive / Illinois / Areal Flood Advisories in 2021

Areal Flood Advisory 1, NWS Lincoln, IL

March 18, 2021Fulton County, Schuyler County, Illinois

NWS Lincoln, IL issued this areal flood advisory at Mar 18, 2021, 10:36 AM CDT for Fulton County, Schuyler County, Illinois. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Mar 18, 2021, 10:36 AM CDT (15:36 UTC)
Expired
Mar 18, 2021, 4:30 PM CDT
In force
6 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon

Counties Fulton County, IL, Schuyler County, IL

The radar

The Lincoln radar (KILX), 93 km from the middle of the area, began a volume at 15:35 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, 3.6 hours before the alert went out and 155 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 2021-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2021-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 308 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
6 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
465 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
308 m²/s²
0-3 km storm-relative helicity
337 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 18, 8:59 AM CDTRiver Flood WarningILXFulton, Knox26 hr
Mar 18, 9:04 AM CDTRiver Flood WarningILXPiatt48 hr
Mar 18, 10:40 AM CDTRiver Flood WarningILXLawrence7 days
Mar 18, 2:40 PM CDTRiver Flood WarningILXBrown, Cass, Morgan, Schuyler21 days
Mar 18, 2:43 PM CDTRiver Flood WarningILXCass, Fulton, Mason14 days
Mar 18, 3:08 PM CDTRiver Flood WarningILXFulton19 hr

Nearby

Areal Flood Advisories in Illinois, 2021Every areal flood 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.