Alert archive / Illinois / Wind Chill Advisories in 2008

Wind Chill Advisory 7, NWS Quad Cities, IA

February 19, 2008Des Moines County, Lee County, Iowa; 8 counties in Illinois; Clark County, Missouri

NWS Quad Cities, IA issued this wind chill advisory at Feb 19, 2008, 3:37 PM CST for Des Moines County, Lee County, Iowa; 8 counties in Illinois; Clark County, Missouri. It took effect at Feb 20, 2008, 1:00 AM CST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 19, 2008, 3:37 PM CST (21:37 UTC)
In effect from
Feb 20, 2008, 1:00 AM CST
Expired
Feb 20, 2008, 9:29 AM CST
In force
8 hr
Issued by
NWS Quad Cities, IA

Counties Des Moines County, IA, Lee County, IA, Bureau County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Warren County, IL, Clark County, MO

The radar

The Quad Cities radar (KDVN), 82 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 84 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 2008-02-19Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2008-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
829 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 19, 3:37 PM CSTWinter Weather AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 13 more18 hr
Feb 19, 3:06 AM CSTRiver Flood AdvisoryDVNWhiteside64 hr

Nearby

Wind Chill Advisories in Illinois, 2008Wind Chill Advisories in Iowa, 2008Wind Chill Advisories in Missouri, 2008Every wind chill advisory in 2008

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.