Alert archive / Arkansas / Winter Storm Warnings in 2018

Winter Storm Warning 1, NWS Little Rock, AR

January 15, 201813 counties in Arkansas

NWS Little Rock, AR issued this winter storm warning at Jan 15, 2018, 4:12 AM CST for 13 counties in Arkansas. It took effect at Jan 15, 2018, 6:00 PM CST. It was in force for 15 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
Jan 15, 2018, 4:12 AM CST (10:12 UTC)
In effect from
Jan 15, 2018, 6:00 PM CST
Expired
Jan 16, 2018, 8:40 AM CST
In force
15 hr
Issued by
NWS Little Rock, AR

Counties Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Grant County, AR, Jefferson County, AR, Lincoln County, AR, Monroe County, AR, Ouachita County, AR

The radar

The Little Rock radar (KLZK), 99 km from the middle of the area, began a volume at 10:11 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

Little Rock, AR (KBYH), launched 00:00Z, 10.2 hours before the alert went out and 219 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, Little Rock, AR at 00:00Z on 2018-01-15Temperature 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, Little Rock, AR at 00:00Z on 2018-01-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 305 square meters per square second.1939587897117Sfc1 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
1326 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
305 m²/s²
0-3 km storm-relative helicity
395 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 14, 8:45 PM CSTWind Chill AdvisoryLZKBaxter, Clark, Cleburne, Conway, Faulkner, Fulton and 18 more43 hr
Jan 14, 9:30 PM CSTWinter Weather AdvisoryLZKBaxter, Cleburne, Fulton, Independence, Izard, Marion and 2 more27 hr
Jan 15, 4:12 AM CSTWinter Weather AdvisoryLZKFaulkner, Garland, Hot Spring, Jackson, Lonoke, Perry and 6 more26 hr

Nearby

Winter Storm Warnings in Arkansas, 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.