[LeArc] Forecast Discussion : MLI@ 8/7/02 2:39:17 PM

[learc@mailman.qth.net]

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


FXUS63 KDVN 071941
AFDMLI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
239 PM CDT WED AUG 7 2002

SURFACE CHART SHOWS HIGH PRESSURE CENTERED OVER NORTHERN MICHIGAN
WITH THE RIDGE AXIS EXTENDING SOUTHWESTWARD THROUGH EASTERN IOWA AND
INTO NORTHERN OKLAHOMA. A DEVELOPING FRONTAL SYSTEM WAS OVER THE
DAKOTAS INTO WYOMING. UPPER AIR CHARTS SHOW HIGH PRESSURE OVER THE
IOWA/MISSOURI AREA AT H7, H5, AND H2...WITH HIGH PRESSURE OVER
NORTHERN WISCONSIN AT H8. RIDGE EXTENDS NORTH FROM THE UPPER LEVEL
HIGH INTO SOUTHERN CANADA AND CENTRAL/WESTERN HUDSON BAY.

FORECAST CHALLENGES INCLUDE PRECIP CHANCES SATURDAY...AS WELL AS
MONDAY NIGHT AND TUESDAY.

SHORT TERM...
SURFACE HIGH RETREATS EASTWARD ALLOWING WINDS TO BECOME MORE
SOUTHERLY. SURFACE STORM SYSTEM DEVELOPS TO OUR WEST AS UPPER LEVEL
TROUGH/LOW OVER THE NORTHWESTERN U.S. MOVES EASTWARD. WILL LOWER
TEMPERATURES A NOTCH FOR TONIGHT AND THURSDAY NIGHT IN THE CENTRAL
EAST TO WEST AREA.

EXTENDED...
RIDGE GRADUALLY WEAKENS AS THE TROF TO OUR WEST MOVES EAST. FLOW
DOMINATED BY A TROF SATURDAY THROUGH TUESDAY...THEN BECOMES MORE
EAST TO WEST ON WEDNESDAY. SURFACE SYSTEM TO AFFECT OUR AREA
SATURDAY WITH A CHANCE OF THUNDERSTORMS. FAIRLY STRONG SURFACE SYSTEM
TO ALSO AFFECT OUR AREA MONDAY NIGHT INTO TUESDAY. SURFACE
BOUNDARY WHICH PASSED THROUGH THE AREA MONDAY NIGHT INTO TUESDAY
INTENSIFIES WITH LOWS DEVELOPING ALONG IT WEDNESDAY...SOUTH OF OUR
AREA. WILL BUMP LOW TEMPS DOWN A BIT ON SATURDAY AND SUNDAY...AND
WILL BUMP BOTH HIGHS AND LOWS DOWN A BIT ON MONDAY...AND BUMP HIGH
TEMPS UP A BIT ON TUESDAY IN THE CENTRAL EAST TO WEST ZONES.


.DVN...
IA...NONE.
IL...NONE.
MO...NONE.

JAZ