Alert archive / Missouri / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 21, NWS St. Louis, MO

April 2, 2014Boone County, Callaway County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 2, 2014, 7:13 AM CDT for Boone County, Callaway County, Missouri. It was in force for 47 min. 8 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 2, 2014, 7:13 AM CDT (12:13 UTC)
Expired: Apr 2, 2014, 8:00 AM CDT
In force: 47 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Boone County, MO, Callaway County, MO

The radar

The St Louis radar (KLSX), 143 km from the middle of the area, began a volume at 12:15 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 2, 7:19 AM CDT	HAIL 1	1 E Mcbaine, MO	SPOTTER REPORTS NICKEL TO QUARTER SIZE HAIL.
Apr 2, 7:22 AM CDT	HAIL 0.75	Columbia, MO	3 MINUTES OF PENNY-SIZED HAIL.
Apr 2, 7:22 AM CDT	HAIL 0.88	1 S Columbia, MO	PEA TO NICKEL SIZE HAIL.
Apr 2, 7:27 AM CDT	HAIL 1.25	1 E Mcbaine, MO	UPDATE FROM SPOTTER...HAIL HAS COVERED GROUND WITH LARGEST STONES THE SIZE OF HALF DOLLARS.
Apr 2, 7:28 AM CDT	HAIL 1	Columbia, MO	QUARTER SIZE HAIL IN DOWNTOWN COLUMBIA.
Apr 2, 7:29 AM CDT	HAIL 0.75	Columbia, MO	KMIZ OBSERVED PENNY SIZE HAIL ON STATION.
Apr 2, 7:30 AM CDT	HAIL 0.7	Columbia, MO	SOUTH COLUMBIA CITY
Apr 2, 7:35 AM CDT	HAIL 0.25	Columbia, MO	NORTH COLUMBIA CITY

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, 0.2 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-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: 811 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 330 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

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

080 
WUUS53 KLSX 021213
SVRLSX
MOC019-027-021300-
/O.NEW.KLSX.SV.W.0021.140402T1213Z-140402T1300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
713 AM CDT WED APR 2 2014

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BOONE COUNTY IN CENTRAL MISSOURI...
  NORTHWESTERN CALLAWAY COUNTY IN CENTRAL MISSOURI...

* UNTIL 800 AM CDT

* AT 708 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES NORTH OF
  JAMESTOWN...AND MOVING EAST AT 40 MPH.

  HAZARD...QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED.

* LOCATIONS IMPACTED INCLUDE...
  COLUMBIA...MCBAINE...HATTON AND KINGDOM CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3906 9207 3906 9197 3891 9189 3877 9240
      3879 9238 3881 9238 3882 9239 3882 9243
      3883 9244 3886 9245 3888 9248 3890 9248
      3893 9252
TIME...MOT...LOC 1212Z 249DEG 37KT 3886 9246

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

$$

BROWNING

2 follow-up statements

467 
WWUS53 KLSX 021223
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
723 AM CDT WED APR 2 2014

MOC019-027-021300-
/O.CON.KLSX.SV.W.0021.000000T0000Z-140402T1300Z/
BOONE MO-CALLAWAY MO-
723 AM CDT WED APR 2 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
CALLAWAY AND SOUTHERN BOONE COUNTIES UNTIL 800 AM CDT...

AT 718 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTH OF
EASLEY...AND MOVING EAST AT 45 MPH.

HAZARD...QUARTER SIZE HAIL.

SOURCE...PUBLIC.

IMPACT...DAMAGE TO VEHICLES IS EXPECTED.

THE SEVERE THUNDERSTORM WILL MOVE OVER THE SOUTH SIDE OF 
THE CITY OF COLUMBIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3906 9207 3906 9197 3891 9189 3877 9240
      3879 9238 3881 9238 3882 9239 3882 9243
      3883 9244 3886 9245 3888 9248 3890 9248
      3893 9252
TIME...MOT...LOC 1222Z 249DEG 37KT 3890 9234

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

$$

BROWNING

146 
WWUS53 KLSX 021238
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
738 AM CDT WED APR 2 2014

MOC019-027-021247-
/O.CAN.KLSX.SV.W.0021.000000T0000Z-140402T1300Z/
BOONE MO-CALLAWAY MO-
738 AM CDT WED APR 2 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CALLAWAY AND
SOUTHERN BOONE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED HOWEVER PEA SIZE 
HAIL IS STILL POSSIBLE WITH THIS STORM.

LAT...LON 3906 9207 3906 9197 3891 9189 3877 9240
      3879 9238 3881 9238 3882 9239 3882 9243
      3883 9244 3886 9245 3888 9248 3890 9248
      3893 9252
TIME...MOT...LOC 1237Z 249DEG 37KT 3895 9215

$$

BROWNING

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 7:44 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	46 min
Apr 2, 8:26 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	49 min
Apr 2, 8:50 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	40 min
Apr 2, 9:47 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	43 min
Apr 2, 10:15 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson	45 min
Apr 2, 10:38 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	52 min
Apr 2, 10:51 AM CDT	Areal Flood Advisory	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	26 days
Apr 2, 11:02 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	43 min
Apr 2, 12:13 PM CDT	Areal Flood Advisory	LSX	Lincoln, Saint Charles, Warren	3 hr
Apr 2, 12:55 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	50 min
Apr 2, 2:12 PM CDT	Flash Flood Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	4 hr
Apr 2, 3:07 PM CDT	Flash Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 14 more	37 hr
Apr 2, 3:18 PM CDT	River Flood Warning	LSX	Saint Charles	57 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.