NWS
St. Louis, Missouri

June 9th, 2005 Severe Weather Event
Thunderstorms Across the St. Louis Metropolitan Region
Resulting in Large Hail, Damaging Winds,
Heavy Rains, and Flash Flooding

Radar and Analysis:
 
Radar Reflectivity
from WSR-88D KLSX
(image loop)
Hydrograph from Deer Creek in East-Central St. Louis County, MO Observed Precipitation Totals as reported from spotters and Cooperative Observers
Radar Derived Precipitation Totals over the St. Louis Metro Area (note the 4+ inches in Jefferson Co.)  
 
Severe Weather Assessment:
The build-up of heat and humidity led to very unstable conditions the afternoon of June 9th, 2005 and the explosive development of thunderstorms across parts of the St. Louis Metropolitan Area.

Thunderstorms rapidly developed across St. Louis County into Northern Jefferson County just after 500 pm the evening of June 9th. The storms became severe dropping hail up to the size of golf balls and produced damaging microburst wind gusts in excess of 60 mph. One of the hardest hit areas was Maplewood and the extreme western sections of the City of St. Louis where numerous large trees were downed by the intense winds.

Very heavy rain also accompanied the severe thunderstorms with rainfall rates in excess of 4 inches per hour. These high rainfall rates and rapid rainfall accumulations produced sharp rises on local creeks and streams that resulted in localized flash flooding.

By 700 pm thunderstorms had dissipated across the City of St. Louis. However the severe thunderstorms and heavy rainfall were relentless in Northern Jefferson County into extreme Southern St. Louis County due to continuous back-building or redevelopment to the south. The region around Highway 30 from Byrnes Mill to High Ridge to Fenton experienced 4 to 6 inches of rainfall in 2 hours time and several periods of large hail.
 
Preliminary Storm Reports for June 9th:
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ST LOUIS MO
1031 PM CDT THU JUN 09 2005
TIME (DATE)

0540 PM (06/09/2005)

0540 PM (06/09/2005)

0545 PM (06/09/2005)

0545 PM (06/09/2005)

0550 PM (06/09/2005)

0550 PM (06/09/2005)

0555 PM (06/09/2005)

0615 PM (06/09/2005)


0625 PM (06/09/2005)

0625 PM (06/09/2005)

0635 PM (06/09/2005)


0635 PM (06/09/2005)

0640 PM (06/09/2005)

0640 PM (06/09/2005)

0645 PM (06/09/2005)

0650 PM (06/09/2005)



0705 PM (06/09/2005)

0710 PM (06/09/2005)

0725 PM (06/09/2005)


0730 PM (06/09/2005)


0730 PM (06/09/2005)

0740 PM (06/09/2005)

0750 PM (06/09/2005)
LOCATION (COUNTY)

CREVE COEUR (ST. LOUIS MO)

CREVE COEUR (ST. LOUIS MO)

MARYLAND HEIGHTS (ST. LOUIS MO)

3 SW OLIVETTE (ST. LOUIS MO)

MARYLAND HEIGHTS (ST. LOUIS MO)

2 N VALLEY PARK (ST. LOUIS MO)

ST. JOHN (ST. LOUIS MO)

OVERLAND (ST. LOUIS MO)


FENTON (ST. LOUIS MO)

HIGH RIDGE (JEFFERSON MO)

ST. LOUIS (ST. LOUIS CITY MO)


ST. LOUIS (ST. LOUIS CITY MO)

MAPLEWOOD (ST. LOUIS MO)

HIGH RIDGE (JEFFERSON MO)

HIGH RIDGE (JEFFERSON MO)

ST. LOUIS (ST. LOUIS CITY MO)



AFFTON (ST. LOUIS MO)

HIGH RIDGE (JEFFERSON MO)

HIGH RIDGE (JEFFERSON MO)


HIGH RIDGE (JEFFERSON MO)


FENTON (ST. LOUIS MO)

FENTON (ST. LOUIS MO)

HIGH RIDGE (JEFFERSON MO)
EVENT

0.88 INCH HAIL

1.00 INCH HAIL

1.00 INCH HAIL

1.75 INCH HAIL

1.25 INCH HAIL

TSTM WND DMG

1.00 INCH HAIL

FLASH FLOOD


1.50 INCH HAIL

0.75 INCH HAIL

TSTM WND DMG


0.75 INCH HAIL

TSTM WND DMG

TSTM WND DMG

1.00 INCH HAIL

TSTM WND DMG



TSTM WND DMG

FLASH FLOOD

FLASH FLOOD


FLASH FLOOD


1.75 INCH HAIL

1.75 INCH HAIL

1.00 INCH HAIL
REMARKS

REPORTED BY AMATEUR RADIO

REPORTED BY TRAINED SPOTTER

REPORTED BY TRAINED SPOTTER

REPORTED BY TRAINED SPOTTER

REPORTED BY TRAINED SPOTTER

LARGE TREE LIMBS BLOWN DOWN.

REPORTED BY TRAINED SPOTTER

6 TO 8 INCHES OF FLOWING WATER ON LINDBERG BETWEEN PAGE AND DORSETT ROADS

REPORTED BY PUBLIC

REPORTED BY PUBLIC

6 TO 8 INCH DIAMETER BRANCHES BLOWN DOWN IN THE SOUTHWEST PORTION OF THE CITY

REPORTED BY TRAINED SPOTTER

TREES AND POWER LINES BLOWN DOWN

A FEW LARGE TREES BLOWN DOWN

REPORTED BY LAW ENFORCEMENT

NUMEROUS TREES BLOWN DOWN ALONG MCCAUSLAND, DALE, MANCHESTER AND JAMIESON AVENUES

1 LARGE TREE LIMB BLOWN DOWN

6-8 INCHES OF WATER ON ROADS IN HIGH RIDGE

3 TO 5 INCH DEEP WATER ON THE PARKING LOT AT THE SHERIFF OFFICE IN HIGH RIDGE

WHITE ASH ROAD AND STATE ROUTE PP AT ANTIRE ROAD ARE CLOSED DUE TO HIGH WATER

REPORTED BY TRAINED SPOTTER

REPORTED BY PUBLIC

REPORTED BY LAW ENFORCEMENT

Go back to the Event Archives


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.