Alert archive / Missouri / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 42, NWS St. Louis, MO

April 30, 2016Marion County, Missouri; Adams County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 30, 2016, 6:38 PM CDT for Marion County, Missouri; Adams County, Illinois. It was in force for 52 min. 3 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 30, 2016, 6:38 PM CDT (23:38 UTC)
Expired: Apr 30, 2016, 7:30 PM CDT
In force: 52 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Adams County, IL, Marion County, MO

The radar

The St Louis radar (KLSX), 150 km from the middle of the area, began a volume at 23:39 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
Apr 30, 6:55 PM CDT	HAIL 1	2 W Palmyra, MO
Apr 30, 6:58 PM CDT	HAIL 1.5	2 W Palmyra, MO
Apr 30, 7:00 PM CDT	HAIL 1	1 N Palmyra, MO

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.6 hours before the alert went out and 204 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: 555 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 273 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

052 
WUUS53 KLSX 302338
SVRLSX
ILC001-MOC127-010030-
/O.NEW.KLSX.SV.W.0042.160430T2338Z-160501T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
638 PM CDT SAT APR 30 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  CENTRAL MARION COUNTY IN NORTHEASTERN MISSOURI...

* UNTIL 730 PM CDT

* AT 638 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PHILADELPHIA...
  MOVING EAST AT 35 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* LOCATIONS IMPACTED INCLUDE...
  QUINCY...PALMYRA...PAYSON...FALL CREEK...PHILADELPHIA...ADAMS...BURTON...
  PLAINVILLE...TAYLOR...COATSBURG...COLUMBUS...MARBLEHEAD...PALOMA AND
  FOWLER.

THIS INCLUDES INTERSTATE 172 BETWEEN EXITS 2 AND 19.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4006 9112 3978 9114 3971 9171 3989 9177
      3995 9155 3995 9144 3997 9146
TIME...MOT...LOC 2338Z 255DEG 28KT 3982 9164 

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

GLASS

4 follow-up statements

440 
WWUS53 KLSX 302356
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
656 PM CDT SAT APR 30 2016

ILC001-MOC127-010030-
/O.CON.KLSX.SV.W.0042.000000T0000Z-160501T0030Z/
ADAMS IL-MARION MO-
656 PM CDT SAT APR 30 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR SOUTHWESTERN ADAMS AND CENTRAL MARION COUNTIES...

AT 656 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER PALMYRA...MOVING
EAST AT 25 MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...TRAINED WEATHER SPOTTERS WEST OF PALMYRA. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

LOCATIONS IMPACTED INCLUDE...
QUINCY...PALMYRA...PAYSON...FALL CREEK...ADAMS...BURTON...PLAINVILLE...
TAYLOR...COATSBURG...COLUMBUS...MARBLEHEAD...FOWLER AND PALOMA.

THIS INCLUDES INTERSTATE 172 BETWEEN EXITS 2 AND 19.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4006 9112 3978 9114 3973 9165 3991 9168
      3995 9155 3995 9144 3997 9146
TIME...MOT...LOC 2356Z 261DEG 20KT 3982 9154 

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

GLASS

814 
WWUS53 KLSX 302359
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
659 PM CDT SAT APR 30 2016

ILC001-MOC127-010030-
/O.CON.KLSX.SV.W.0042.000000T0000Z-160501T0030Z/
ADAMS IL-MARION MO-
659 PM CDT SAT APR 30 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR SOUTHWESTERN ADAMS AND CENTRAL MARION COUNTIES...

AT 659 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER PALMYRA...MOVING
EAST AT 30 MPH.

HAZARD...PING PONG BALL SIZE HAIL. 

SOURCE...TRAINED WEATHER SPOTTERS. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT DAMAGE 
         TO ROOFS...SIDING...WINDOWS...AND VEHICLES. 

LOCATIONS IMPACTED INCLUDE...
QUINCY...PALMYRA...PAYSON...FALL CREEK...ADAMS...BURTON...PLAINVILLE...
TAYLOR...COATSBURG...COLUMBUS...MARBLEHEAD...FOWLER AND PALOMA.

THIS INCLUDES INTERSTATE 172 BETWEEN EXITS 2 AND 19.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4006 9112 3978 9114 3973 9165 3991 9164
      3995 9155 3995 9144 3997 9146
TIME...MOT...LOC 2359Z 255DEG 28KT 3983 9151 

HAIL...1.50IN
WIND...<50MPH
 
$$

GLASS

047 
WWUS53 KLSX 010020
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
720 PM CDT SAT APR 30 2016

MOC127-010029-
/O.CAN.KLSX.SV.W.0042.000000T0000Z-160501T0030Z/
MARION MO-
720 PM CDT SAT APR 30 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MARION COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3978 9114 3977 9136 3978 9137 3979 9136
      3981 9137 3983 9141 3986 9144 3990 9144
      3991 9142 3993 9142 3996 9145 3997 9145
      4000 9113
TIME...MOT...LOC 0019Z 259DEG 28KT 3985 9130 

$$

ILC001-010030-
/O.CON.KLSX.SV.W.0042.000000T0000Z-160501T0030Z/
ADAMS IL-
720 PM CDT SAT APR 30 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR SOUTHWESTERN ADAMS COUNTY...

AT 719 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PAYSON...MOVING
EAST AT 35 MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

LOCATIONS IMPACTED INCLUDE...
QUINCY...PAYSON...FALL CREEK...ADAMS...BURTON...PLAINVILLE...COLUMBUS AND
MARBLEHEAD.

THIS INCLUDES INTERSTATE 172 BETWEEN EXITS 2 AND 15.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3978 9114 3977 9136 3978 9137 3979 9136
      3981 9137 3983 9141 3986 9144 3990 9144
      3991 9142 3993 9142 3996 9145 3997 9145
      4000 9113
TIME...MOT...LOC 0019Z 259DEG 28KT 3985 9130 

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

GLASS

971 
WWUS53 KLSX 010029
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
729 PM CDT SAT APR 30 2016

ILC001-010038-
/O.EXP.KLSX.SV.W.0042.000000T0000Z-160501T0030Z/
ADAMS IL-
729 PM CDT SAT APR 30 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ADAMS COUNTY WILL
EXPIRE AT 730 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER SMALL HAIL
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3978 9114 3977 9136 3978 9137 3979 9136
      3981 9137 3983 9141 3986 9144 3990 9144
      3991 9142 3993 9142 3996 9145 3997 9145
      4000 9113
TIME...MOT...LOC 0026Z 255DEG 28KT 3985 9130 

$$

GLASS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 10:21 AM CDT	River Flood Warning	LSX	Franklin, Warren	3 days
Apr 30, 10:21 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	3 days
Apr 30, 5:08 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	17 min
Apr 30, 5:49 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles	41 min
Apr 30, 6:37 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	38 min
Apr 30, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	49 min
Apr 30, 6:48 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Lincoln, Saint Charles, Saint Louis, Warren	42 min
Apr 30, 4:53 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	52 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2016 Severe Thunderstorm Warnings in Illinois, 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.