Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 75, NWS St. Louis, MO

June 19, 2021Monroe County, Ralls County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 19, 2021, 6:54 PM CDT for Monroe County, Ralls County, Missouri. It was in force for 51 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
Jun 19, 2021, 6:54 PM CDT (23:54 UTC)
Expired
Jun 19, 2021, 7:45 PM CDT
In force
51 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Monroe County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 114 km from the middle of the area, began a volume at 23:53 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.

IssuedProductOfficeLasted
Jun 19, 2:43 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.9 hours before the alert went out and 257 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, Davenport, at 12:00Z on 2021-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 193 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, Davenport, at 12:00Z on 2021-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.1939587897Sfc1 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
193 J/kg
Mixed-layer CIN
-377 J/kg
Mixed-layer LCL
1271 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

117 
WUUS53 KLSX 192354
SVRLSX
MOC137-173-200045-
/O.NEW.KLSX.SV.W.0075.210619T2354Z-210620T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
654 PM CDT Sat Jun 19 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Ralls County in northeastern Missouri...
  Northeastern Monroe County in northeastern Missouri...

* Until 745 PM CDT.

* At 654 PM CDT, a severe thunderstorm was located 8 miles south of
  Monroe City, moving east at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Perry around 710 PM CDT.

Other locations in the path of this severe thunderstorm include
Spaulding, Center and New London.

This also includes Mark Twain Lake Recreational Area.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3948 9142 3945 9146 3932 9144 3932 9163
      3933 9169 3946 9189 3964 9184 3966 9139
TIME...MOT...LOC 2354Z 282DEG 19KT 3954 9177 

HAIL...1.00IN
WIND...60MPH
 
$$

GKS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 2:15 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike31 min
Jun 19, 2:44 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike32 min
Jun 19, 2:52 PM CDTSevere Thunderstorm WarningLSXPike38 min
Jun 19, 2:55 PM CDTSevere Thunderstorm WarningLSXLincoln50 min
Jun 19, 3:21 PM CDTSevere Thunderstorm WarningLSXPike25 min
Jun 19, 3:31 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles44 min
Jun 19, 4:16 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles, Saint Louis44 min
Jun 19, 4:35 PM CDTFlash Flood WarningLSXSaint Charles6 hr
Jun 19, 4:43 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis47 min
Jun 19, 5:09 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis51 min
Jun 19, 5:17 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis43 min
Jun 19, 5:25 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis35 min
Jun 19, 5:31 PM CDTSevere Thunderstorm WarningLSXMarion, Ralls59 min
Jun 19, 5:46 PM CDTSevere Thunderstorm WarningLSXPike, Ralls59 min
Jun 19, 5:58 PM CDTFlash Flood WarningLSXMarion, Pike, Ralls6 hr
Jun 19, 6:00 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis45 min
Jun 19, 6:46 PM CDTSevere Thunderstorm WarningLSXLincoln, Pike44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2021Every 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.