Alert archive / Missouri / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 50, NWS St. Louis, MO

April 3, 2007Callaway County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 3, 2007, 12:27 PM CDT for Callaway County, Osage County, Missouri. It was in force for 48 min. 1 report 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 3, 2007, 12:27 PM CDT (17:27 UTC)
Expired: Apr 3, 2007, 1:15 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Callaway County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 17:25 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 3, 12:35 PM CDT	HAIL 0.88	New Bloomfield, MO

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 3, 7:37 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 3, 11:51 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 5.5 hours before the alert went out and 250 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: 1571 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 930 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 031727
SVRLSX
MOC027-151-031815-
/O.NEW.KLSX.SV.W.0050.070403T1727Z-070403T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1227 PM CDT TUE APR 3 2007

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALLAWAY COUNTY IN CENTRAL MISSOURI
  NORTHEASTERN OSAGE COUNTY IN CENTRAL MISSOURI

* UNTIL 115 PM CDT

* AT 1225 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
  STORM WAS LOCATED 10 MILES WEST OF HOLTS SUMMIT...OR ABOUT 8 MILES
  SOUTH OF ASHLAND...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LAKE MYKEE...
  HOLTS SUMMIT...
  NEW BLOOMFIELD...
  CHAMOIS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 3860 9219 3872 9222 3873 9219 3882 9214
      3894 9166 3859 9166 3858 9198 3858 9198
      3858 9197 3859 9196 3860 9199 3858 9201
      3858 9216

$$

CVKING

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 3, 7:12 AM CDT, 5 hours 15 minutes earlier.

Area forecast discussion, Apr 3, 7:12 AM CDT, 5 hours 15 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
712 AM CDT TUE APR 3 2007

.DISCUSSION...
ONE LAST WRM AND STORMY DAY FOR THE BI-STATE REGION TIL A COOL
AND DRY WX PATTERN BGNS TGT. SFC LOW WILL DVLP OVR IA AS
A RELATIVELY STG SHRTWV TROF MOVES EWD THRU THE NRN PLAINS AND
UPR LVL DIVERGENCE INCRS OVR NWRN MO AND IA BY 12Z TUE AHD OF UPR
LVL TROF. TSRA CAN BE EXPECTED ALONG THIS STG CDFNT AS IT MOVES
FAIRLY RAPIDLY SEWD THRU THE CWA TDA. BOTH NAM AND GFS MDLS DEPICT
STG UPR LVL DIVERGENCE OVR MUCH OF THE CWA BY 18Z TUE AHD OF THE
UPR LVL TROF. POTENTIAL OF SVR STORMS ALONG AND AHD OF THIS CDFNT
AS THE NAM MDL FCSTS K INDICES IN THE LWR 30S OVR MAINLY THE ERN
AND SRN PTN OF THE CWA BY 18Z TUE ALONG WITH SFC LI VALUES OF ARND
-6 ALONG AND AHD OF THE CDFNT. TEMPERATURES WILL LIKELY BGN TO
FALL THIS AFTN ACRS THE NRN AND WRN PTN OF THE CWA BHND THE CDFNT
AS THE MDLS ARE SHOWING VRY STG 850 MB CAA MAINLY FM STL N AND W
THIS AFTN. THE CDFNT SHOULD PUSH SEWD TO THE MOST ERN AND SRN
PTNS OF THE CWA BY 00Z WED. MAY INCLUDE A LOW POP THIS EVNG
MAINLY OVR THE SERN PTN OF THE CWA...TIL STG LOW LVL CAA AND
DRYING END THE THREAT OF TSRA. WILL HAVE CLRG BEHIND THE CDFNT AS
STG SFC RDG BLDS SEWD THRU THE CWA THIS EVNG...BUT WILL LIKELY
HAVE SOME WRP ARND TYPE LOW LVL CLOUDINESS MAINLY OVR THE NRN AND
ERN PTN OF THE CWA LT TGT INTO EARLY WED MRNG SW OF THE SFC AND
UPR LVL LOW CNTRD OVR THE GRT LKS REGION. MUCH COLDER TEMPERATURES
FOR WED MRNG AS THE MDLS DROP THE -4 DGR C 850 MB ISOTHERM SWD TO
THE STL METRO AREA BY 12Z WED. LOW TEMPERATURES SHOULD BE IN THE
30S TGT WITH LOWS NR THE FREEZING MARK IN COU AND UIN. TRANQUIL
AND UNSEASONABLY COOL WX FOR WED AND WED NGT AS THE STG SFC RDG
CONTS TO BLD SEWD THRU MO AND IL. LOW TEMPERATURES WED NGT SHOULD
BE BLW FREEZING OVR THE ENTR CWA WITH GOOD RADIATIONAL COOLING
WITH A MOSTLY CLR SKY...DCRSG NWLY SFC WNDS...AND SFC DWPTS IN THE
UPR TEENS TO LWR 20S. NAM MDL DVLPS SOME WAA TYPE PCPN OVR MAINLY
THE SWRN PTN OF THE CWA THU NGT...ALTHOUGH THE GFS KEEPS ALL THE
PCPN SW OF THE CWA. MAY INCLUDE A LOW POP OF RAIN/SNOW THU NGT
OVR THE SWRN PTN OF THE CWA.

GKS

&&

.AVIATION...
FOR THE 12Z TAFS...
A STRONG COLD FRONT WILL BE MAKING ITS WAY ACROSS THE AREA TODAY
REACHING COLUMBIA AROUND NOON...ST LOUIS AROUND 3 TO 4PM. THERE IS
A MODERATE RISK FOR SEVERE STORMS NEAR ST LOUIS WITH A SLIGHT RISK
AT COLUMBIA AND QUINCY. THE WINDS ALOFT ARE 45 TO 50 KNOTS WITHIN
3 THOUSAND FEET BUT THESE WILL DIE DOWN BY 8 TO 9 AM AS THE
GRADIENT SLACKS OFF. NO TIME FOR ADDITIONAL COMMENTS DUE TO SEVERE WEATHER.

PEDIGO

&&

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

WFO LSX

Hazardous weather outlook, Apr 3, 9:24 AM CDT, 3 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
924 AM CDT TUE APR 3 2007

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-041200-
GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL-
MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL-
CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX-LEWIS-
SHELBY-MARION-MONROE-RALLS-PIKE-BOONE-AUDRAIN-MONITEAU-COLE-OSAGE-
CALLAWAY-MONTGOMERY-LINCOLN-GASCONADE-WARREN-ST. CHARLES-FRANKLIN-
ST. LOUIS-ST. LOUIS CITY-JEFFERSON-CRAWFORD-WASHINGTON-
ST. FRANCOIS-STE. GENEVIEVE-IRON-MADISON-REYNOLDS-
924 AM CDT TUE APR 3 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND
CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS WILL CONTINUE TO DEVELOP ALONG AND JUST AHEAD OF
A COLD FRONT TODAY. SEVERE THUNDERSTORMS ARE LIKELY WITH LARGE
HAIL AND DAMAGING WINDS. LOCALIZED HEAVY RAINFALL AND FLASH
FLOODING IS ALSO POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A LARGE CANADIAN HIGH PRESSURE SYSTEM WILL BUILD INTO THE REGION
BEHIND THE COLD FRONT AND DOMINATE OUR WEATHER THROUGH THE
WEEKEND. NIGHTTIME LOW TEMPERATURES WILL FALL BELOW FREEZING LATE
WEDNESDAY NIGHT...THURSDAY NIGHT...FRIDAY NIGHT AND AGAIN ON
SATURDAY
NIGHT.

PEOPLE WITH AGRICULTURAL INTERESTS SHOULD MONITOR THE FORECAST
CLOSELY AND BE PREPARED IF TENDER VEGETATION SHOULD NEED TO BE
PROTECTED FROM THE COLD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY...REPORT ANY SEVERE WEATHER AND FLASH
FLOODING TO THE NATIONAL WEATHER SERVICE IN ST. LOUIS.

CVKING

In the hours before

Local storm report, Apr 3, 9:00 AM CDT, 3 hours 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
900 AM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 AM     HAIL             COLUMBIA                38.95N 92.33W
04/03/2007  E0.75 INCH       BOONE              MO   TRAINED SPOTTER

0835 AM     HAIL             COLUMBIA                38.95N 92.33W
04/03/2007  E0.88 INCH       BOONE              MO   BROADCAST MEDIA

0835 AM     HAIL             COLUMBIA                38.95N 92.33W
04/03/2007  E1.00 INCH       BOONE              MO   BROADCAST MEDIA

0835 AM     HAIL             1 NE COLUMBIA           38.96N 92.31W
04/03/2007  E0.75 INCH       BOONE              MO   TRAINED SPOTTER

0835 AM     FLASH FLOOD      SHELBYVILLE             39.81N 92.04W
04/03/2007                   SHELBY             MO   LAW ENFORCEMENT

            FOUR INCHES TO 1 FOOT COVERING THE ROADS IN MANY
            LOCATIONS THROUGHOUT SHELBY COUNTY.

0845 AM     FLASH FLOOD      SHELBINA                39.69N 92.04W
04/03/2007                   SHELBY             MO   LAW ENFORCEMENT

            6 INCHES OF WATER FLOWING OVER THE EXIT RAMP OF U.S. 36
            IN SHELBINA.

0845 AM     HAIL             N COLUMBIA              38.95N 92.33W
04/03/2007  E0.75 INCH       BOONE              MO   EMERGENCY MNGR

            NEAR INTERSTATE 70 AND RANGELINE ROAD.

&&

SIPPRELL

Local storm report, Apr 3, 9:06 AM CDT, 3 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
906 AM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0845 AM     FLASH FLOOD      S SHELBINA              39.69N 92.04W
04/03/2007                   SHELBY             MO   CO-OP OBSERVER

            2.65 INCHES OF RAIN SINCE 7 AM THIS MORNING. LOCAL CREEKS
            AND STREAMS OVERFLOWING ONTO ROADS THROUGHOUT AREA.
            COUNTY BEGINNING TO BARRICADE OFF LOCAL ROADS COVERED
            WITH WATER.

0900 AM     FLASH FLOOD      5 E SHELBINA            39.69N 91.95W
04/03/2007                   SHELBY             MO   LAW ENFORCEMENT

            6 INCHES OF WATER FLOWING ACROSS U.S. 36.

&&

SIPPRELL

Local storm report, Apr 3, 9:09 AM CDT, 3 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
909 AM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0905 AM     FLASH FLOOD      5 E SHELBINA            39.69N 91.95W
04/03/2007                   SHELBY             MO   LAW ENFORCEMENT

            3 FEET OF WATER FLOWING OVER U.S. 36. ROAD IS CLOSED.

&&

SIPPRELL

Local storm report, Apr 3, 10:05 AM CDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1005 AM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0935 AM     FLASH FLOOD      GRANVILLE               39.56N 92.10W
04/03/2007                   MONROE             MO   LAW ENFORCEMENT

            THREE TO FOUR FEET OF WATER OVER THE ROAD NEAR HIGHWAYS
            151 AND J AND ALSO ON STATE ROUTE A NEAR GRANVILLE.

&&

LENNING

Local storm report, Apr 3, 11:55 AM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1155 AM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1145 AM     HAIL             3 E HAMEL               38.89N 89.79W
04/03/2007  U1.00 INCH       MADISON            IL   TRAINED SPOTTER

            ON HIGHWAY 140

&&

LENNING

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 5:19 AM CDT	Severe Thunderstorm Warning	LSX	Knox	26 min
Apr 3, 6:05 AM CDT	Severe Thunderstorm Warning	LSX	Knox, Shelby	40 min
Apr 3, 6:43 AM CDT	Severe Thunderstorm Warning	LSX	Marion, Monroe, Shelby	62 min
Apr 3, 7:26 AM CDT	Severe Thunderstorm Warning	LSX	Marion, Monroe, Shelby	64 min
Apr 3, 8:38 AM CDT	Flash Flood Warning	LSX	Monroe, Shelby	4 hr
Apr 3, 8:38 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	52 min
Apr 3, 9:14 AM CDT	Severe Thunderstorm Warning	LSX	Pike	46 min
Apr 3, 9:30 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	45 min
Apr 3, 9:48 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln	42 min
Apr 3, 12:10 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Cole, Moniteau	50 min
Apr 3, 12:48 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	23 min
Apr 3, 12:55 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	49 min
Apr 3, 1:01 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Montgomery, Warren	59 min
Apr 3, 1:11 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Washington	49 min
Apr 3, 1:28 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	47 min
Apr 3, 1:32 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	43 min
Apr 3, 1:52 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	38 min
Apr 3, 2:08 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	52 min
Apr 3, 2:13 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	47 min
Apr 3, 2:14 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	31 min
Apr 3, 2:20 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	36 min
Apr 3, 2:21 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	39 min
Apr 3, 2:27 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	48 min
Apr 3, 2:31 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	29 min
Apr 3, 2:33 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	57 min
Apr 3, 2:48 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Washington	42 min
Apr 3, 2:59 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
Apr 3, 3:07 PM CDT	Severe Thunderstorm Warning	LSX	Washington	26 min
Apr 3, 3:11 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	49 min
Apr 3, 3:13 PM CDT	Severe Thunderstorm Warning	LSX	Madison	47 min
Apr 3, 3:27 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	33 min
Apr 3, 3:37 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	42 min
Apr 3, 3:57 PM CDT	Severe Thunderstorm Warning	LSX	Madison	33 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2007 Every severe thunderstorm warning in 2007

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.