Alert archive / Missouri / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 208, NWS St. Louis, MO

April 22, 2006Crawford County, Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 22, 2006, 9:19 PM CDT for Crawford County, Washington County, Missouri. It was in force for 41 min. 6 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 22, 2006, 9:19 PM CDT (02:19 UTC)
Expired: Apr 22, 2006, 10:00 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Crawford County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 80 km from the middle of the area, began a volume at 02:22 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 22, 9:20 PM CDT	HAIL 0.75	15 Sse Sullivan, MO
Apr 22, 9:20 PM CDT	HAIL 0.75	Ne Potosi, MO
Apr 22, 9:25 PM CDT	HAIL 1.25	Potosi, MO
Apr 22, 9:32 PM CDT	HAIL 0.75	1 E Belgrade, MO
Apr 22, 9:37 PM CDT	HAIL 1	10 E Steelville, MO	ALONG HIGHWAY 8
Apr 22, 9:40 PM CDT	HAIL 0.75	Steelville, MO

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 6 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.3 hours before the alert went out and 270 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: 5 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2633 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 230220
SVRLSX
MOC055-221-230300-
/O.NEW.KLSX.SV.W.0208.060423T0219Z-060423T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
919 PM CDT SAT APR 22 2006

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CRAWFORD COUNTY IN EAST CENTRAL MISSOURI
  WASHINGTON COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 1000 PM CDT

* AT 917 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR LEASBURG...OR ABOUT NEAR BOURBON...AND 
  MOVING SOUTHEAST AT 40 MPH.  OTHER SEVERE STORMS WERE LOCATED NEAR
  ANOTHONIES MILL AND SHIRLEY...MOVING SOUTHEAST AT 40 MPH.
 

* LOCATIONS IMPACTED INCLUDE...
  ANTHONIES MILL...
  OLD MINES...
  POTOSI...
  MINERAL POINT...
  IRONDALE...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
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.

LAT...LON 3821 9150 3792 9156 3775 9066 3805 9062
      3821 9082

$$
GLASS

2 follow-up statements

000 
WWUS53 KLSX 230240
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
939 PM CDT SAT APR 22 2006

MOC055-221-230300-
/O.CON.KLSX.SV.W.0208.000000T0000Z-060423T0300Z/
WASHINGTON MO-CRAWFORD MO-
939 PM CDT SAT APR 22 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR CRAWFORD AND WASHINGTON COUNTIES...

AT 937 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE HAIL 
8 MILES NORTHEAST OF CHERRYVILLE AND 2 MILES NORTH OF 
SHERLEY...MOVING SOUTHEAST AT 40 MPH.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
LATTY...SHIRLEY AND BELGRADE.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
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.

LAT...LON 3821 9150 3792 9157 3779 9144 3775 9067
      3805 9063 3821 9082

$$

CARNEY

000 
WWUS53 KLSX 230258
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
958 PM CDT SAT APR 22 2006

MOC055-221-230308-
/O.EXP.KLSX.SV.W.0208.000000T0000Z-060423T0300Z/
WASHINGTON MO-CRAWFORD MO-
958 PM CDT SAT APR 22 2006

...THE SEVERE THUNDERSTORM WARNING FOR CRAWFORD AND WASHINGTON
COUNTIES HAS EXPIRED...

THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND NO LONGER 
APPEARED TO BE SEVERE. HOWEVER...FREQUENT DANGEROUS LIGHTNING GUSTY 
WINDS...AND SMALL HAIL WILL CONTINUE TO BE A THREAT FROM THESE 
STORMS.

LAT...LON 3821 9150 3792 9157 3779 9144 3775 9067
      3805 9063 3821 9082

$$

CARNEY

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 22, 6:41 PM CDT, 2 hours 38 minutes earlier.

Area forecast discussion, Apr 22, 6:41 PM CDT, 2 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
641 PM CDT SAT APR 22 2006

.DISCUSSION...
MAIN FORECAST ISSUE CONTINUES TO BE TRW CHANCES AS FRONTAL BOUNDARY
REMAINS STALLED OVER CWA. FRONT TO FLUXUATE N AND S OVER NEXT TWO TO
THREE DAYS BEFORE FINALLY EXITING REGION.

TONIGHT...MAIN QUESTION IS WILL THERE BE ANY RW/TRW ACTIVITY ALONG
BOUNDARY. MOISTURE REMAINS RATHER SPARSE. MODELS CONTINUE TO
INDICATE MCS DEVELOPMENT TONIGHT...BUT NOT ON THE SCALE THAT WE WILL
SEE SUNDAY NIGHT. LOW LEVEL MOISTURE AND WAA ARE ON THE INCREASE
ALONG THE FRONT TONIGHT...WITH JET PARALLEL TO BOUNDARY...INDICATING
SOME BACKBUILDING WITH IT. FOR NOW WILL KEEP LOW CHANCE POPS FOR
SOUTHERN HALF OF CWA...ALONG AND SOUTH OF I-70.

ON SUNDAY...SHOULD SEE SOME LINGERING RWS/TRWS OVER SOUTHERN HALF OF
CWA AS NOCTURNAL ACTIVITY DIMINISHES.

BY SUNDAY NIGHT...SFC LOW OVER SWRN KS WILL BEGIN TO SLIDE EAST
SOUTHEASTWARD ALONG BOUNDARY IN RESPONSE TO SHORTWAVE THAT UNDERCUTS
UPPER RIDGE. INITIAL MCS DEVELOPMENT WILL BE CLOSE TO TRIPLE
POINT...OVER NE KS/NWRN MO...THEN SLIDE EAST ON MONDAY.

FRONT TO SINK SOUTH OF CWA BY MONDAY NIGHT. HOWEVER...WILL STILL SEE
SOME POST FRONTAL PCPN...ESPECIALLY OVER SOUTHERN HALF OF CWA MONDAY
NIGHT AND TUESDAY.

BEYOND TUESDAY...STRONG RIDGE OF HIGH PRESSURE BUILDS IN BRINGING IN
COOLER AND DRIER WEATHER FOR THE EXTENDED FORECAST PERIOD. TEMPS TO
BE A LITTLE BELOW NORMAL FOR THIS TIME OF YEAR.

BYRD

&&

.AVIATION...
FOR THE 00Z TAFS...
QUASI-STATIONARY FRONTAL BOUNDARY EXTENDS ACROSS SOUTHERN ILLINOIS
TO NEAR KSTL SOUTHWEST TO NEAR KAIZ CONTINUING TO NEAR KJLN.
SHORT RANGE MODEL FORECASTS SHOW THIS FRONT SINKING VERY SLOWLY
SOUTH OVERNIGHT...PAST THE SOUTHERN TIP OF ILLINOIS...BUT
REMAINING OVER SOUTHERN MISSOURI BY 12Z. WARM ADVECTION OVER THE
TOP OF THIS FRONT COULD KEEP THE ONGOING SCATTERED CONVECTION
ACROSS SOUTHERN PORTIONS OF THE CWFA ACTIVE THROUGH THE EVENING
AND EVEN PAST 06Z. LOOKS LIKE THE CONVECTION WILL TRY TO DIMINISH
AFTER SUNRISE BEFORE POSSIBLY FLARING UP AGAIN LATE IN THE
AFTERNOON.

THAT BEING SAID...LSX TERMINALS ARE ALL VFR WITH WINDS BECOMING
LIGHT AND VARIABLE AFTER SUNSET. DONT EXPECT ANY SIGNIFICANT
WEATHER OUTSIDE OF THE SCATTERED THUNDERSTORMS ACROSS
SOUTHERN/SOUTHWESTERN PORTIONS OF THE CWFA. THERE IS AN OUTSIDE
CHANCE THAT A CELL OR TWO COULD DRIFT NEAR THE KCOU OR KJEF
TERMINALS TONIGHT...BUT DIDNT THINK THE CHANCE WAS HIGH ENOUGH
FOR TEMPOS AT KCOU.

CARNEY
&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...NONE.
IL...NONE.
&&

WFO LSX

Hazardous weather outlook, Apr 22, 3:21 PM CDT, 5 hours 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
321 PM CDT SAT APR 22 2006

ILZ064-065-069-070-074-079-100>102-MOZ041-047>052-059>065-072>075-
084-085-099-231215-
BOND IL-BOONE-CALLAWAY-CLINTON IL-COLE-CRAWFORD-FAYETTE IL-
FRANKLIN-GASCONADE-IRON-JEFFERSON-LINCOLN-MADISON-MADISON IL-
MARION IL-MONITEAU-MONROE IL-MONTGOMERY-OSAGE-RANDOLPH IL-
REYNOLDS-ST. CHARLES-ST. CLAIR IL-ST. FRANCOIS-ST. LOUIS-
ST. LOUIS CITY-STE. GENEVIEVE-WARREN-WASHINGTON-WASHINGTON IL-
321 PM CDT SAT APR 22 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ILLINOIS...SOUTHWEST ILLINOIS...CENTRAL MISSOURI...EAST CENTRAL
MISSOURI AND SOUTHEAST MISSOURI.

.DAY ONE...TONIGHT
SCATTERED THUNDERSTORMS MAY DEVELOP TONIGHT ALONG A WEST TO EAST
ORIENTED STATIONARY FRONT LYING ACROSS MISSOURI AND ILLINOIS.
THESE THUNDERSTORMS ARE NOT EXPECTED TO BECOME SEVERE AT THIS
TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THERE WILL CONTINUE TO BE A CHANCE OF THUNDERSTORMS INTO TUESDAY
MORNING WHEN THE FRONT WILL MOVE SOUTH OF THE AREA. A FEW OF
THESE STORMS COULD PRODUCE LARGE HAIL AND DAMAGING WINDS MAINLY
SUNDAY NIGHT AND ON MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT.

ILZ058>060-095>099-MOZ018-019-026-027-034>036-042-231215-
ADAMS IL-AUDRAIN-BROWN IL-CALHOUN IL-GREENE IL-JERSEY IL-KNOX-
LEWIS-MACOUPIN IL-MARION-MONROE-MONTGOMERY IL-PIKE-PIKE IL-RALLS-
SHELBY-
321 PM CDT SAT APR 22 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ILLINOIS...SOUTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...CENTRAL
MISSOURI AND NORTHEAST MISSOURI.

.DAY ONE...TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THERE IS A CHANCE OF THUNDERSTORMS FROM SUNDAY NIGHT INTO TUESDAY
AS A SERIES OF STORM SYSTEMS MOVE ALONG A STATIONARY FRONT ORIENTED
FROM WEST TO EAST ACROSS MISSOURI AND ILLINOIS. THERE IS A SLIGHT RISK
THAT A FEW OF THESE STORMS COULD PRODUCE LARGE HAIL AND DAMAGING
WINDS ON SUNDAY NIGHT AND ON MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT.

RP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 10:14 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	32 min
Apr 23, 9:33 AM CDT	Severe Thunderstorm Warning	LSX	Callaway	42 min
Apr 23, 9:47 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Moniteau, Osage	43 min
Apr 23, 9:58 AM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	47 min
Apr 23, 10:17 AM CDT	Severe Thunderstorm Warning	LSX	Gasconade	22 min
Apr 23, 4:16 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	44 min
Apr 23, 4:48 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	42 min
Apr 23, 5:08 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	30 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2006 Every severe thunderstorm warning in 2006

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.