Alert archive / Missouri / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 166, NWS St. Louis, MO

June 30, 2014Lewis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 30, 2014, 9:22 PM CDT for Lewis County, Missouri. It was in force for 24 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 30, 2014, 9:22 PM CDT (02:22 UTC)
Expired: Jun 30, 2014, 9:46 PM CDT
In force: 24 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Lewis County, MO

The radar

The Quad Cities radar (KDVN), 181 km from the middle of the area, began a volume at 02:24 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
Jun 30, 5:29 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.4 hours before the alert went out and 185 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: 157 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 1059 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 552 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

696 
WUUS53 KLSX 010222
SVRLSX
MOC111-010300-
/O.NEW.KLSX.SV.W.0166.140701T0222Z-140701T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
922 PM CDT MON JUN 30 2014

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LEWIS COUNTY IN NORTHEAST MISSOURI...

* UNTIL 1000 PM CDT

* AT 920 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR COLONY...AND
  MOVING EAST AT 60 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.

* LOCATIONS IMPACTED INCLUDE...
  CANTON...LA BELLE...LEWISTOWN AND MONTICELLO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

&&

LAT...LON 4025 9150 4025 9149 4018 9151 4005 9150
      4008 9195 4026 9195
TIME...MOT...LOC 0222Z 269DEG 53KT 4024 9197

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH

$$

TILLY

1 follow-up statement

701 
WWUS53 KLSX 010246
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
946 PM CDT MON JUN 30 2014

MOC111-010257-
/O.CAN.KLSX.SV.W.0166.000000T0000Z-140701T0300Z/
LEWIS MO-
946 PM CDT MON JUN 30 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LEWIS 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.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 100 AM. 

LAT...LON 4025 9150 4025 9149 4018 9151 4005 9150
      4008 9195 4026 9195
TIME...MOT...LOC 0247Z 268DEG 45KT 4017 9169

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 9:06 PM CDT	Severe Thunderstorm Warning	LSX	Knox	39 min
Jun 30, 10:35 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	17 days
Jul 1, 3:27 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Sainte Genevieve, Saint Francois	28 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2014 Every severe thunderstorm warning in 2014

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.