Alert archive / Missouri / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 29, NWS St. Louis, MO

April 27, 2016Lewis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 2016, 8:30 PM CDT for Lewis County, Missouri. It was in force for 30 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: Apr 27, 2016, 8:30 PM CDT (01:30 UTC)
Expired: Apr 27, 2016, 9:00 PM CDT
In force: 30 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Lewis County, MO

The radar

The Quad Cities radar (KDVN), 178 km from the middle of the area, began a volume at 01:30 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
Apr 27, 2:33 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 182 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: 595 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 338 m²/s²
0-3 km storm-relative helicity: 343 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

444 
WUUS53 KLSX 280130
SVRLSX
MOC111-280200-
/O.NEW.KLSX.SV.W.0029.160428T0130Z-160428T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
830 PM CDT WED APR 27 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LEWIS COUNTY IN NORTHEASTERN MISSOURI...

* UNTIL 900 PM CDT

* AT 830 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CANTON...
  MOVING NORTHEAST AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* THIS SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  NORTHEASTERN LEWIS COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FOR WEST CENTRAL
ILLINOIS...AND NORTHEASTERN MISSOURI.

LAT...LON 4025 9150 4020 9150 4018 9152 4012 9160
      4017 9171 4025 9169
TIME...MOT...LOC 0130Z 206DEG 13KT 4019 9160 

HAIL...1.25IN
WIND...60MPH
 
$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 7:23 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	37 min
Apr 27, 7:39 PM CDT	Tornado Warning	LSX	Lewis, Marion	36 min
Apr 27, 7:39 PM CDT	Tornado Warning	LSX	Knox	21 min
Apr 27, 7:46 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Shelby	44 min
Apr 27, 7:59 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Shelby	46 min
Apr 27, 8:23 PM CDT	Tornado Warning	LSX	Lewis, Marion, Shelby	37 min
Apr 27, 8:48 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion	42 min
Apr 27, 9:15 PM CDT	Tornado Warning Tornado observed	LSX	Lewis	30 min
Apr 27, 9:24 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	38 min
Apr 27, 9:56 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson	34 min
Apr 27, 10:59 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	23 min
Apr 28, 9:53 AM CDT	River Flood Warning	LSX	Callaway, Osage	8 days
Apr 28, 9:53 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	8 days
Apr 28, 9:53 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	6 days

Nearby

Severe Thunderstorm Warnings in Missouri, 2016 Every severe thunderstorm warning in 2016

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.