Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 2, NWS St. Louis, MO

March 26, 2018Callaway County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 26, 2018, 8:29 AM CDT for Callaway County, Missouri. It was in force for 24 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 26, 2018, 8:29 AM CDT (13:29 UTC)
Expired: Mar 26, 2018, 8:53 AM CDT
In force: 24 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Callaway County, MO

The radar

The St Louis radar (KLSX), 110 km from the middle of the area, began a volume at 13:29 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.

What was reported inside it

Time	Report	Where	Remark
Mar 26, 8:45 AM CDT	HAIL 1	4 E Holts Summit, MO	HAIL COVERING THE GROUND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 1.5 hours before the alert went out and 256 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 400 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 414 m²/s²
0-3 km storm-relative helicity: 364 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

573 
WUUS53 KLSX 261329
SVRLSX
MOC027-261415-
/O.NEW.KLSX.SV.W.0002.180326T1329Z-180326T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
829 AM CDT MON MAR 26 2018

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southern Callaway County in central Missouri...

* Until 915 AM CDT.

* At 829 AM CDT, a severe thunderstorm was located near Holts Summit,
  moving northeast at 35 mph.

  HAZARD...Quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* Locations impacted include...
  Jefferson City, Fulton, Holts Summit, Lake Mykee Town, Lake Mykee,
  Mokane, Wainwright, Tebbetts, Reform and Steedman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3892 9195 3882 9165 3868 9183 3867 9187
      3864 9189 3859 9195 3859 9198 3857 9201
      3856 9205 3856 9210 3858 9217
TIME...MOT...LOC 1329Z 213DEG 28KT 3860 9204 

HAIL...1.00IN
WIND...<50MPH
 
$$

Byrd

1 follow-up statement

704 
WWUS53 KLSX 261353
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
853 AM CDT MON MAR 26 2018

MOC027-261403-
/O.CAN.KLSX.SV.W.0002.000000T0000Z-180326T1415Z/
Callaway MO-
853 AM CDT MON MAR 26 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CALLAWAY COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled.

LAT...LON 3892 9195 3882 9165 3868 9183 3867 9187
      3864 9189 3859 9195 3859 9198 3857 9201
      3856 9205 3856 9210 3858 9217
TIME...MOT...LOC 1350Z 213DEG 28KT 3876 9191 

$$

Byrd

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 26, 7:45 AM CDT	Special Weather Statement	LSX	Cole	30 min
Mar 26, 9:18 AM CDT	Special Weather Statement	LSX	Moniteau	42 min
Mar 26, 11:48 AM CDT	Special Weather Statement	LSX	Monroe	42 min
Mar 26, 12:33 PM CDT	Areal Flood Advisory	LSX	Monroe	3 hr
Mar 26, 1:02 PM CDT	Flash Flood Warning	LSX	Audrain, Monroe	6 hr
Mar 26, 1:50 PM CDT	Flash Flood Warning	LSX	Audrain, Pike, Ralls	6 hr
Mar 26, 2:39 PM CDT	River Flood Warning	LSX	Monroe	4 days

Nearby

Severe Thunderstorm Warnings in Missouri, 2018 Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.