Alert archive / Kentucky / Winter Storm Warnings in 2018

Winter Storm Warning 4, NWS Paducah, KY

March 11, 201817 counties in Kentucky; 4 counties in Illinois

NWS Paducah, KY issued this winter storm warning at Mar 11, 2018, 1:37 PM CDT for 17 counties in Kentucky; 4 counties in Illinois. It took effect at Mar 11, 2018, 3:00 PM CDT. It was in force for 11 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
Mar 11, 2018, 1:37 PM CDT (18:37 UTC)
In effect from
Mar 11, 2018, 3:00 PM CDT
Expired
Mar 12, 2018, 2:22 AM CDT
In force
11 hr
Issued by
NWS Paducah, KY
All 21 counties

Gallatin County, IL, Hardin County, IL, Massac County, IL, Pope County, IL, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Crittenden County, KY, Daviess County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Union County, KY, Webster County, KY

The radar

The Paducah radar (KPAH), 60 km from the middle of the area, began a volume at 18:40 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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.6 hours before the alert went out and 187 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, Nashville Metro, TN at 12:00Z on 2018-03-11Temperature 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, Nashville Metro, TN at 12:00Z on 2018-03-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939587897117136Sfc1 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
590 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Paducah, KY wrote its last area forecast discussion before this winter storm warning went out at Mar 11, 1:13 PM CDT, 24 minutes earlier.

Area forecast discussion, Mar 11, 1:13 PM CDT, 24 minutes before
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Hazardous weather outlook, Mar 11, 4:32 AM CDT, 9 hours 5 minutes before
Hazardous Weather Outlook
National Weather Service Paducah KY
432 AM CDT Sun Mar 11 2018

ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-
100-107>112-114-120945-
Jefferson-Wayne IL-Edwards-Wabash-Perry IL-Franklin-Hamilton-
White-Jackson-Williamson-Saline-Gallatin-Union-Johnson-Pope-
Hardin-Alexander-Pulaski-Massac-Gibson-Pike-Posey-Vanderburgh-
Warrick-Spencer-Fulton-Hickman-Carlisle-Ballard-McCracken-Graves-
Livingston-Marshall-Calloway-Crittenden-Lyon-Trigg-Caldwell-
Union KY-Webster-Hopkins-Christian-Henderson-Daviess-McLean-
Muhlenberg-Todd-Perry MO-Bollinger-Cape Girardeau-Wayne MO-Carter-
Ripley-Butler-Stoddard-Scott-Mississippi-New Madrid-
432 AM CDT Sun Mar 11 2018

This Hazardous Weather Outlook is for portions of southern
Illinois, southwest Indiana, western Kentucky, and southeast
Missouri.

.DAY ONE...Today and Tonight

A Winter Weather Advisory is in effect for western Kentucky, far
southern Illinois, and the Mississippi River counties of southeast
Missouri. Rain will change to a burst of heavy wet snow late today
or this evening. A quick 1 to 3 inches of snow is expected.
Isolated higher amounts are possible in small bands of heavy snow.
Please refer to the advisory product for more details.

Flood Warnings continue for many area rivers. Rivers and lakes
have either reached their flood crest or the flood crest is
currently occurring. Please refer to flood statements for details.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There is a slight chance for thunderstorms in southeast
Missouri, southwest Illinois and far west Kentucky late Friday
night, and mainly across portions of southeast Missouri and west
Kentucky on Saturday.  Severe storms are not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time. However,
spotters are encouraged to report snow accumulations or impacts to
roads.

York

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 11, 4:16 AM CDTWinter Weather AdvisoryPAHBallard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more24 hr
Mar 11, 9:38 AM CDTRiver Flood WarningPAHMuhlenberg5 days
Mar 11, 1:09 PM CDTAreal Flood WarningPAHCalloway, Graves, Livingston, Lyon, McCracken, Marshall and 1 more24 hr

Nearby

Winter Storm Warnings in Kentucky, 2018Winter Storm Warnings in Illinois, 2018Every winter storm warning in 2018

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.