Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 87, NWS St. Louis, MO

April 19, 2011Pike County, Illinois; Pike County, Ralls County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 19, 2011, 3:46 PM CDT for Pike County, Illinois; Pike County, Ralls County, Missouri. It was in force for 44 min. 13 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 19, 2011, 3:46 PM CDT (20:46 UTC)
Expired: Apr 19, 2011, 4:30 PM CDT
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Pike County, IL, Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 20:48 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 19, 3:51 PM CDT	HAIL 0.5	Curryville, MO
Apr 19, 3:51 PM CDT	HAIL 1.25	Curryville, MO
Apr 19, 3:52 PM CDT	HAIL 2.75	Curryville, MO	HAIL THE SIZE OF GOLFBALLS AND BASEBALLS
Apr 19, 3:54 PM CDT	HAIL 0.25	Spencerburg, MO
Apr 19, 3:59 PM CDT	HAIL 1.75	Curryville, MO	SPOTTER WAS AT THE FIREHOUSE IN CURRYVILLE
Apr 19, 4:04 PM CDT	TORNADO	4 Wsw Bowling Green, MO	REPORT RELAYED FROM MODOT THROUGH CO-OP OBSERVER
Apr 19, 4:05 PM CDT	TORNADO	1 W Bowling Green, MO	POLICE OBSERVING TORNADO 1-2 MILES WEST OF BOWLING GREEN
Apr 19, 4:05 PM CDT	TORNADO	Curryville, MO	TORNADO OBSERVED ALONG HWY U. RELAYED BY TRAINED SPOTTER
Apr 19, 4:11 PM CDT	TORNADO	3 S Bowling Green, MO	TORNADO JUST SOUTH OF BOWLING GREEN MOVING NORTHEAST AND HEADING TOWARD HIGHWAY 161
Apr 19, 4:18 PM CDT	TORNADO	Bowling Green, MO	POSSIBLE TORNADO DAMAGE IN BOWLING GREEN. SHERIFF OFFICE CONFIRMS ONE HOUSE DAMAGED WITH POWER OUTAGES.
Apr 19, 4:19 PM CDT	HAIL 1.75	3 E Bowling Green, MO	SPOTTER LOCATED ON HIGHWAY 54
Apr 19, 4:20 PM CDT	HAIL 1.75	Louisiana, MO
Apr 19, 4:37 PM CDT	TORNADO	5 Sw Bowling Greenu, MO	BOWLING GREEN FIRE DEPT CONFIRMED ONE HOME DAMAGED SW OF BOWLING GREEN. OCCURRED AT LEAST 20 MINUTES AGO

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 19, 1:00 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.8 hours before the alert went out and 235 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: 453 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

951 
WUUS53 KLSX 192046
SVRLSX
ILC149-MOC163-173-192130-
/O.NEW.KLSX.SV.W.0087.110419T2046Z-110419T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
346 PM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHERN PIKE COUNTY IN NORTHEAST MISSOURI...
  SOUTHEASTERN RALLS COUNTY IN NORTHEAST MISSOURI...

* UNTIL 430 PM CDT

* AT 344 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE   
  THUNDERSTORM PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED 
  NEAR CURRYVILLE...OR NEAR VANDALIA...AND MOVING NORTHEAST AT 45 
  MPH. THIS STORM IS EXPECTED TO INTENSIFY TO PRODUCE PING PONG BALL 
  SIZE HAIL AND WIND GUSTS UP TO 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BOWLING GREEN...LOUISIANA...CURRYVILLE...SPENCERBURG...FRANKFORD...
  PIKE...ATLAS...ST. CLEMENT...ASHBURN...NEW CANTON AND ROCKPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

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

&&

LAT...LON 3959 9095 3941 9088 3940 9094 3939 9092
      3928 9120 3926 9144 3932 9144 3932 9152
      3940 9159 3967 9117
TIME...MOT...LOC 2045Z 235DEG 37KT 3933 9140
WIND...HAIL 60MPH 1.50IN

$$

TILLY

1 follow-up statement

831 
WWUS53 KLSX 192055
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
355 PM CDT TUE APR 19 2011

ILC149-MOC163-173-192130-
/O.CON.KLSX.SV.W.0087.000000T0000Z-110419T2130Z/
PIKE IL-PIKE MO-RALLS MO-
355 PM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN PIKE
COUNTY IN WEST CENTRAL ILLINOIS...AND SOUTHEASTERN RALLS AND NORTHERN
PIKE COUNTIES IN NORTHEAST MISSOURI UNTIL 430 PM CDT...

AT 352 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING LARGE DESTRUCTIVE HAIL UP TO BASEBALL SIZE. 
THIS STORM WAS LOCATED NEAR CURRYVILLE...OR 7 MILES EAST OF
VANDALIA...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  BOWLING GREEN...LOUISIANA...SPENCERBURG...FRANKFORD...PIKE...
  ATLAS...ST. CLEMENT...ASHBURN...ROCKPORT AND NEW CANTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA UNTIL 900 PM. 
THIS IS A SUPERCELL THUNDERSTORM. DUE TO THE ROTATING NATURE OF 
SUPERCELLS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE 
WEATHER...INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE 
WINDS AND POSSIBLY TORNADOES. BE PREPARED TO ACT QUICKLY SHOULD A 
TORNADO OCCUR OR A TORNADO WARNING BE ISSUED.

&&

LAT...LON 3959 9095 3941 9088 3940 9094 3939 9092
      3928 9120 3926 9144 3932 9144 3932 9150
      3941 9151 3967 9117
TIME...MOT...LOC 2054Z 234DEG 32KT 3935 9134
WIND...HAIL <50MPH 2.75IN

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 4:35 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	40 min
Apr 19, 5:14 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Pike	31 min
Apr 19, 6:21 AM CDT	Areal Flood Advisory	LSX	Madison, Monroe, Saint Clair	3 hr
Apr 19, 6:22 AM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	38 min
Apr 19, 6:26 AM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	49 min
Apr 19, 6:56 AM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	49 min
Apr 19, 7:08 AM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison, Montgomery	37 min
Apr 19, 7:36 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Macoupin, Madison, Montgomery	39 min
Apr 19, 8:07 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	38 min
Apr 19, 8:25 AM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	29 min
Apr 19, 8:41 AM CDT	Severe Thunderstorm Warning	LSX	Fayette	34 min
Apr 19, 11:18 AM CDT	River Flood Warning	LSX	Calhoun, Greene, Jersey	85 days
Apr 19, 3:59 PM CDT	Tornado Warning	LSX	Pike	46 min
Apr 19, 4:18 PM CDT	Tornado Warning	LSX	Calhoun, Greene, Pike	42 min
Apr 19, 4:31 PM CDT	Tornado Warning	LSX	Calhoun	44 min
Apr 19, 4:41 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin, Madison	49 min
Apr 19, 4:59 PM CDT	Tornado Warning	LSX	Greene, Pike	46 min
Apr 19, 5:28 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin	47 min
Apr 19, 5:28 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	47 min
Apr 19, 5:36 PM CDT	Tornado Warning	LSX	Macoupin	39 min
Apr 19, 5:42 PM CDT	Severe Thunderstorm Warning	LSX	Greene	34 min
Apr 19, 5:44 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	34 min
Apr 19, 6:01 PM CDT	Tornado Warning	LSX	Montgomery	44 min
Apr 19, 6:05 PM CDT	Tornado Warning	LSX	Macoupin, Montgomery	40 min
Apr 19, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	48 min
Apr 19, 6:14 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	61 min
Apr 19, 6:31 PM CDT	Tornado Warning	LSX	Montgomery	27 min
Apr 19, 6:56 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Macoupin, Madison, Montgomery	64 min
Apr 19, 2:51 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau, Osage	39 min
Apr 19, 3:19 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	41 min
Apr 19, 3:26 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Osage	49 min
Apr 19, 3:39 AM CDT	Severe Thunderstorm Warning	LSX	Moniteau	21 min
Apr 19, 3:57 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 4 more	48 min
Apr 19, 4:43 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Warren	47 min
Apr 19, 4:58 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Washington	32 min
Apr 19, 5:23 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Saint Charles, Warren, Washington	37 min
Apr 19, 5:43 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Washington	47 min
Apr 19, 8:05 AM CDT	River Flood Warning	LSX	Saint Charles	30 hr
Apr 19, 11:06 AM CDT	River Flood Warning	LSX	Lincoln	19 days
Apr 19, 11:33 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	30 days
Apr 19, 3:48 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike	42 min
Apr 19, 3:54 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Osage	51 min
Apr 19, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Franklin, Gasconade, Osage	51 min
Apr 19, 4:31 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	44 min
Apr 19, 5:01 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	44 min
Apr 19, 5:13 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Saint Charles, Warren	47 min
Apr 19, 5:56 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	34 min
Apr 19, 5:58 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	32 min
Apr 19, 6:14 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	31 min
Apr 19, 6:15 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	60 min
Apr 19, 6:30 PM CDT	Flash Flood Warning	LSX	Saint Charles	3 hr
Apr 19, 6:37 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds, Saint Francois, Washington	53 min
Apr 19, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles	30 min
Apr 19, 6:51 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	39 min
Apr 19, 6:56 PM CDT	Areal Flood Advisory	LSX	Franklin, Warren	5 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Severe Thunderstorm Warnings in Illinois, 2011 Every severe thunderstorm warning in 2011

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.