Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 187, NWS Springfield, MO

December 15, 2021St. Clair County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Dec 15, 2021, 7:42 PM CST for St. Clair County, Missouri. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 15, 2021, 7:42 PM CST (01:42 UTC)
Expired: Dec 15, 2021, 8:15 PM CST
In force: 33 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County St. Clair County, MO

The radar

The Pleasant Hill radar (KEAX), 90 km from the middle of the area, began a volume at 01:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 15, 6:00 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.7 hours before the alert went out and 141 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 9 J/kg
Mixed-layer CIN: -387 J/kg
Mixed-layer LCL: 1246 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 310 m²/s²
0-3 km storm-relative helicity: 677 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

988 
WUUS53 KSGF 160142
SVRSGF
MOC185-160230-
/O.NEW.KSGF.SV.W.0187.211216T0142Z-211216T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
742 PM CST Wed Dec 15 2021

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  St. Clair County in west central Missouri...

* Until 830 PM CST.

* At 742 PM CST, severe thunderstorms were located along a line
  extending from 11 miles southwest of Appleton City to Schell City
  to near Walker, moving northeast at 65 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Truman Lake...                    Appleton City...
  Osceola...                        Lowry City...
  Roscoe...                         Tiffin...
  Johnson City...                   Taberville...
  Iconium...                        Monegaw Springs...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3821 9354 3821 9351 3820 9351 3820 9350
      3807 9351 3791 9406 3821 9405 3820 9356
      3822 9356
TIME...MOT...LOC 0142Z 239DEG 55KT 3807 9416 3801 9413 3795 9420 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Wise

1 follow-up statement

603 
WWUS53 KSGF 160215
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
815 PM CST Wed Dec 15 2021

MOC185-160225-
/O.CAN.KSGF.SV.W.0187.000000T0000Z-211216T0230Z/
St. Clair MO-
815 PM CST Wed Dec 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR ST. CLAIR COUNTY IS
CANCELLED...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CST for
central and west central Missouri.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Springfield.

LAT...LON 3821 9354 3821 9351 3820 9351 3820 9350
      3807 9351 3791 9406 3821 9405 3820 9356
      3822 9356
TIME...MOT...LOC 0215Z 239DEG 55KT 3833 9361 3827 9358 3821 9365 

$$

Wise

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 15, 6:16 PM CST	Severe Thunderstorm Warning	SGF	Vernon	59 min
Dec 15, 7:08 PM CST	Severe Thunderstorm Warning	SGF	Barton, Vernon	67 min
Dec 15, 7:58 PM CST	Special Weather Statement	SGF	Barton, Jasper	62 min
Dec 15, 8:06 PM CST	Special Weather Statement	SGF	Cedar, Hickory, St. Clair	54 min
Dec 15, 8:52 PM CST	Special Weather Statement	SGF	Cedar, Dade, Polk	53 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2021 Every severe thunderstorm warning in 2021

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.