[LeArc] Special Weather Statement : MLI@ 7/28/02 5:54:49 AM

[learc@mailman.qth.net]

The following weather message is provided by McDonough County E.S.D.A.


WWUS35 KMLI 281057
SPSMLI
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-291000-

SIGNIFICANT WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
555 AM CDT SUN JUL 28 2002

...A SULTRY SUNDAY...THEN STORMS LATE TONIGHT AND MONDAY MORNING...

A WARM DOME OF AIR ENTRENCHED OVER THE AREA WILL GET REINFORCED TODAY
BY A SOUTHWEST BREEZE. TEMPERATURES WILL BE PUMPED UP INTO THE
LOWER TO MIDDLE 90S THIS AFTERNOON. THESE AMBIENT TEMPERATURES WILL
COMBINE WITH DEWPOINTS IN THE MIDDLE 70S TO PRODUCE HEAT INDICES FROM
103 TO 108 DEGREES BY MID AFTERNOON. THIS HOT AND HUMID WEATHER
HAS SPAWNED THE NEED FOR HEAT ADVISORY FOR TODAY AND TONIGHT. HEAT
INDICES WILL REMAIN ABOVE 80 DEGREES UNTIL LATE TONIGHT...WHEN
THUNDERSTORMS WITH THEIR COOLING RAIN AND OUT-FLOWS BRING RELIEF FROM
THE HEAT. PEOPLE ARE URGED TO CURTAIL ANY STRENUOUS OUTDOOR ACTIVITY
PLANNED FOR TODAY....AND TAKE THE NECESSARY PRECAUTIONS TO STAY COOL.
CLOUD BLOW-OFF FROM STORM COMPLEXES OVER THE CENTRAL PLAINS AND
INSTABILITY CLOUDS ALREADY OVER THE AREA...WILL MAKE FOR A MOSTLY
CLOUDY MORNING...BUT THIS CLOUD COVER SHOULD THIN BY THIS AFTERNOON
TO ALLOW THE SUNSHINE TO HAVE ITS HEATING AFFECT.

A SECONDARY WARM FRONT WILL PUSH ACROSS NORTHEAST MISSOURI AND INTO
WEST CENTRAL ILLINOIS TODAY....WITH SCATTERED SHOWERS AND
THUNDERSTORMS FORMING ALONG AND NORTH OF IT. THESE SHOWERS AND STORMS
WILL AFFECT AREAS MAINLY SOUTH OF THE INTERSTATE 80 CORRIDOR THROUGH
NOON. OTHERWISE...THE WARM DOME OF AIR ALOFT SHOULD LIMIT MORE
WIDESPREAD THUNDERSTORM ACTIVITY UNTIL LATER TONIGHT WHEN A COLD
FRONT APPROACHES FROM THE WEST. THIS FRONT WILL ACT ON THE WARM AND
HUMID AIR IN PLACE OVER THE AREA TO FORM SHOWERS AND THUNDERSTORMS.
WITH THIS FRONT NOW NOT EXPECTED TO CROSS THE MISSISSIPPI RIVER UNTIL
MID MONDAY MORNING...MOST OF THE SHOWER AND THUNDERSTORM ACTIVITY
WILL NOT OCCUR UNTIL AFTER MIDNIGHT. LATEST INDICATIONS SUGGEST THAT
THE STORMS WILL AFFECT THE AREA IN A FORM OF A SQUALL LINE AFTER 3
AM. ALTHOUGH THIS LATE NIGHT/ EARLY MORNING TIMING IS NOT NORMALLY
CONDUCIVE TO SEVERE WEATHER...THE AMOUNT OF HEAT AND MOISTURE IN THE
AIRMASS AHEAD OF THE FRONT MAY STILL ALLOW THIS SQUALL LINE TO
PRODUCE DAMAGING WINDS OF 55 TO 65 MPH. THERE IS ALSO THE POSSIBILITY
OF A STORM COMPLEX DEVELOPING AHEAD OF THE MAIN LINE OF STORMS AND
AFFECTING PORTIONS OF THE AREA EARLIER IN THE EVENING. THESE EARLIER
STORM COMPLEXES WOULD ALSO HAVE THE CAPABILITY OF PRODUCING DAMAGING
WIND GUSTS IN EXCESS OF 60 MPH...AS WELL AS HAIL UP TO AN INCH IN
DIAMETER. THE ENTIRE AREA IS OUTLOOKED FOR A SLIGHT RISK OF SEVERE
WEATHER THROUGH MONDAY MORNING.

SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT. STAY TUNED FOR LATER
UPDATES AND FORECASTS CONCERNING THE HOT WEATHER AND NEXT ROUND OF
THUNDERSTORMS.

$$

JDH

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