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970 

RWUS32 KSTL 191451

FFSSTL

ILZ100-101-191859-



URBAN AND SMALL STREAM FLOOD ADVISORY

NATIONAL WEATHER SERVICE ST LOUIS MO

949 AM CDT THU JUL 19 2001



...HIGH WATER COVERING PARTS OF MADISON AND ST CLAIR COUNTIES

JUST EAST OF ST LOUIS...



AN URBAN AND SMALL STREAM FLOOD ADVISORY HAS BEEN ISSUED THROUGH

200 PM CDT THIS AFTERNOON FOR MADISON AND ST CLAIR COUNTIES

IN THE EASTERN ST LOUIS METROPOLITAN AREA.



A PAIR OF EARLY MORNING THUNDERSTORMS FOLLOWED ONE ANOTHER

SOUTHEAST ACROSS THE ILLINOIS SIDE OF THE ST LOUIS METRO AREA

DUMPING LARGE AMOUNTS OF RAIN DURING THE MORNING RUSH HOUR.



THE AREA INVOLVED WAS A NARROW STRIP THROUGH WESTERN MADISON COUNTY

SOUTHEAST INTO ST. CLAIR COUNTY FROM JUST NORTH OF ALTON TO 10 MILES

EAST OF BELLEVILLE.



NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES SHOW A SMALL

AREA OF 3 TO 4 INCHES OF RAINFALL HAS FALLEN FROM JUST EAST OF

ALTON ALONG ROUTE 3 TO EAST ALTON AND ROXANA. COLLINSVILLE AND

AREAS FROM MID AMERICA AIRPORT EAST OF BELLEVILLE AND SOUTH

ALSO RECEIVED HEAVY RAINS. THIS RAIN OCCURRED BETWEEN 600 AND 800 AM

THIS MORNING.



THOUGH THE RAIN HAS STOPPED THE RUNOFF WILL KEEP ROADWAYS

FLOODED THIS MORNING...ESPECIALLY THOSE WITH POORER DRAINAGE.

STREAMS AND TRIBUTARIES WILL BECOME TEMPORARILY ENGORGED OR

PERHAPS FLOODED FOR A FEW HOURS.



VEHICLES AND PERSONS SHOULD NOT TRY TO DRIVE OR WALK THROUGH FLOODED

AREAS.  PARENTS SHOULD NOT ALLOW THEIR CHILDREN TO PLAY IN DRAINAGE

DITCHES...THEY COULD BE SWEPT INTO A CULVERT OR OBSTRUCTION THAT

WOULD ENDANGER THEIR SAFETY.



A CLUSTER OF SHOWERS AND THUNDERSTORMS HAS DEVELOPED THIS MORNING

OVER NORTHEAST MISSOURI. THESE WILL SAG SOUTHEAST AND ADDITIONAL

RAINFALL COULD OCCUR DURING THE LATE MORNING TO LUNCH HOUR.

THESE STORMS WILL NOT BE AS HEAVY BUT COULD SLOW THE DRAINAGE OF

FLOODED AREAS.



MORE SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REDEVELOP LATER TODAY

AND TONIGHT. SHOULD ANY OF THESE PASS THROUGH THE AREA THE

LIKELIHOOD OF FLOODING HAS BEEN GREATLY ENHANCED BY THIS MORNINGS

ACTIVITY. KEEP ABREAST OF LOCAL WEATHER DEVELOPMENTS IN YOUR

AREA AND MONITER YOUR FAVORITE MEDIA, COMPUTER ACCESS, OR NOAA

WEATHER RADIO FOR POSSIBLE STATEMENTS OR WARNINGS.



PEDIGO

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