Alert archive / Missouri / Frost Advisories in 2020

Frost Advisory 8, NWS Springfield, MO

October 23, 202011 counties in Missouri

NWS Springfield, MO issued this frost advisory at Oct 23, 2020, 2:29 PM CDT for 11 counties in Missouri. It took effect at Oct 24, 2020, 1:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Oct 23, 2020, 2:29 PM CDT (19:29 UTC)
In effect from
Oct 24, 2020, 1:00 AM CDT
Expired
Oct 23, 2020, 10:29 PM CDT
In force
Issued by
NWS Springfield, MO

Counties Camden County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Hickory County, MO, Lawrence County, MO, McDonald County, MO, Miller County, MO, Morgan County, MO, Newton County, MO, Polk County, MO

The radar

The Springfield radar (KSGF), 42 km from the middle of the area, began a volume at 19:32 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

Springfield, MO (KSGF), launched 12:00Z, 7.5 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, Springfield, MO at 12:00Z on 2020-10-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 752 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 12:00Z on 2020-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 square meters per square second.193958Sfc1 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
752 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.8

Open this sounding in Storm Lab

The office that day

Everything else NWS Springfield, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 23, 2:29 PM CDTFreeze WarningSGFBarton, Benton, Jasper, St. Clair, Vernon13 hr

Nearby

Frost Advisories in Missouri, 2020Every frost advisory in 2020

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.