Alert archive / Missouri / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 27, NWS St. Louis, MO

April 27, 2016Knox County, Shelby County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 2016, 7:46 PM CDT for Knox County, Shelby County, Missouri. It was in force for 44 min. 2 reports 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: Apr 27, 2016, 7:46 PM CDT (00:46 UTC)
Expired: Apr 27, 2016, 8:30 PM CDT
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Knox County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 195 km from the middle of the area, began a volume at 00:46 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
Apr 27, 8:13 PM CDT	HAIL 0.88	Baring, MO
Apr 27, 8:14 PM CDT	HAIL 0.88	1 Ne Baring, MO

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

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, 0.8 hours before the alert went out and 222 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.

895 
WUUS53 KLSX 280046
SVRLSX
MOC103-205-280130-
/O.NEW.KLSX.SV.W.0027.160428T0046Z-160428T0130Z/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN SHELBY COUNTY IN NORTHEASTERN MISSOURI...
  KNOX COUNTY IN NORTHEASTERN MISSOURI...

* UNTIL 830 PM CDT

* AT 745 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR GREENTOP TO NEAR ATLANTA...MOVING EAST AT 30
  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...
  EDINA...KNOX CITY...PLEVNA...COLONY...GREENSBURG...HURDLAND...NOVELTY...
  BARING...BETHEL...NEWARK AND LEONARD.

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 NORTHEASTERN
MISSOURI.

LAT...LON 4030 9195 3995 9195 3981 9194 3982 9229
      3995 9229 3996 9234 4030 9235
TIME...MOT...LOC 0045Z 263DEG 26KT 4034 9248 3991 9240 

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

CARNEY

1 follow-up statement

361 
WWUS53 KLSX 280127
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
827 PM CDT WED APR 27 2016

MOC103-205-280136-
/O.EXP.KLSX.SV.W.0027.000000T0000Z-160428T0130Z/
SHELBY MO-KNOX MO-
827 PM CDT WED APR 27 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SHELBY AND KNOX
COUNTIES WILL EXPIRE AT 830 PM CDT...
            
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER SMALL HAIL
AND GUSTY WINDS UP TO 50 MPH ARE STILL POSSIBLE WITH THESE
THUNDERSTORMS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FOR NORTHEASTERN
MISSOURI.

LAT...LON 4030 9195 3995 9195 3981 9194 3982 9229
      3995 9229 3996 9234 4030 9235
TIME...MOT...LOC 0125Z 263DEG 26KT 4034 9248 3991 9240 

$$

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, 7:59 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, 8:30 PM CDT	Severe Thunderstorm Warning	LSX	Lewis	30 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.