Alert archive / Arkansas / Mesoscale Discussions in 2022

Mesoscale Discussion 69

January 15, 202210 counties in Arkansas; 4 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jan 15, 2022, 1:37 PM CST for 10 counties in Arkansas; 4 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 15, 2022, 1:37 PM CST (19:37 UTC)
Expired
Jan 15, 2022, 7:30 PM CST
In force
6 hr
Issued by
the Storm Prediction Center
Concerning
Heavy snow

Counties Baxter County, AR, Boone County, AR, Fulton County, AR, Izard County, AR, Marion County, AR, Newton County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Howell County, MO, Oregon County, MO, Ozark County, MO, Taney County, MO

The radar

The Little Rock radar (KLZK), 155 km from the middle of the area, began a volume at 19:40 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

Little Rock, AR (KLZK), launched 12:00Z, 7.6 hours before the alert went out and 249 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 12:00Z on 2022-01-15Temperature 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 12:00Z on 2022-01-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 256 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
1211 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
256 m²/s²
0-3 km storm-relative helicity
265 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 15, 5:31 AM CSTMesoscale DiscussionSPCBenton, Carroll, Madison, Washington6 hr

Nearby

Mesoscale Discussions in Arkansas, 2022Mesoscale Discussions in Missouri, 2022Every mesoscale discussion in 2022

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.