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000
FXUS63 KDVN 160447
AFDDVN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1147 PM CDT SAT JUN 15 2013

.SYNOPSIS...
ISSUED AT 227 PM CDT SAT JUN 15 2013

WEAK DISTURBANCES ARE PRODUCING LOTS OF CLOUDS AND DEBRIS SHOWERS
AND THUNDERSTORMS ACROSS THE UPPER MIDWEST AHEAD OF A SLOW MOVING
AND WEAK COOL FRONT IN THE CENTRAL PLAINS. NOWCAST TOOLS SUGGEST
NEW CONVECTION TO FIRE BETWEEN 20-23Z THAT IS POORLY HANDLED BY
ALL SOLUTIONS. LIKELY MOST AREAS TO RECEIVE RAINFALL TONIGHT WITH
COVERAGE 30-70 PERCENT OF MOSTLY LIGHT TO MODERATE AMOUNTS. TRENDS
SUPPORT DRIER CONDITIONS AND MODERATELY HUMID WITH VERY WEAK HIGH
PRESSURE ON SUNDAY AND TREND TO COOLER AND DRIER THROUGH TUESDAY.

&&

.SHORT TERM...(THIS EVENING THROUGH SUNDAY)
ISSUED AT 227 PM CDT SAT JUN 15 2013

TONIGHT...MINOR CHANGES MADE WITH EVENING TO HAVE AREAS OF SHOWERS
AND STORMS WITH LOCAL TOOLS SUGGESTING NEAR SEVERE MAY BE POSSIBLE
TIL MID EVENING. MAIN THREAT TO BE HAIL TO NEAR 1 INCH AND GUSTY
WINDS OF 40 UP TO ISOLATED NEAR 60 MPH. PRECIPITATION SHOULD SLIDE
TO SE OF AREA TOWARD DAYBREAK SUNDAY...IF NOT EARLIER. LOWS SHOULD
REMAIN MOSTLY IN THE MID TO UPPER 60S. PATCHY FOG POSSIBLE IF
SKIES CLEAR EARLY ENOUGH FOR LATER SHIFTS TO MONITOR.

SUNDAY...OVERALL TYPICAL SUMMER DAY WITH MODERATE HUMIDITY AND
MOSTLY SUNNY SKIES. HIGHS...NEAR NORMAL OF 82-86F WITH DEWPOINTS
MAINLY IN THE LOWER TO MIDDLE 60S FROM NORTH TO SOUTH. KEPT VERY
LOW POPS SOUTH OF HIGHWAY 34...LATER SHIFTS MAY BE ABLE TO REMOVE
IF BOUNDARY SLIDES FURTHER SOUTH.

.LONG TERM...(SUNDAY NIGHT THROUGH SATURDAY)
ISSUED AT 227 PM CDT SAT JUN 15 2013

.SUNDAY NIGHT AND MONDAY...A WEAK VORT MAX WILL APPROACH THE
SOUTHERN PART OF THE FORECAST AREA SUNDAY NIGHT. THIS SHORTWAVE MAY
PRODUCE A FEW THUNDERSTORMS MAINLY SOUTH OF INTERSTATE 80. THERE IS
A MORE WIDE SPREAD CHANCE OF SHOWERS AND THUNDERSTORMS ON MONDAY AS
THE BEST UPPER DYNAMICS WITH THIS SHORTWAVE AND ASSOCIATED WEAK COLD
FRONT CROSSES THE UPPER MISSISSIPPI VALLEY. HIGH TEMPERATURES ON
MONDAY WILL BE IN THE LOW TO MID 80S. OVERNIGHT LOWS WILL BE NEAR 60.

.TUESDAY THROUGH THURSDAY...DRY WEATHER...MID RANGE MODELS INDICATE
DRY CONDITIONS AS AN UPPER LEVEL SHORTWAVE RIDGE MOVES TOWARD THE
REGION. ALSO BY TUESDAY...THE MODELS HAVE MOVED THE QUASISTATIONARY
FRONT THAT HAS BEEN THE FOCUS FOR SHOWERS AND THUNDERSTORMS OVER THE
UPPER MISSISSIPPI VALLEY TO THE SOUTH ACROSS MISSOURI AND CENTRAL
ILLINOIS. SKIES WILL BE PARTLY TO MOSTLY SUNNY WITH DAYTIME HIGH
TEMPERATURES IN THE UPPER 70S TO AROUND 80. OVERNIGHT LOWS WILL BE
IN MID 50S NORTH AND AROUND 60 SOUTH. BY THURSDAY...THERE WILL BE A
WARMING TREND WITH TEMPERATURES RISING INTO THE MID 80S.

.FRIDAY AND SATURDAY...HIGH PRESSURE OVER THE OHIO VALLEY WILL
PRODUCE SOUTHERLY WINDS OVER THE FORECAST AREA. THERE WILL BE A
CHANCE OF THUNDERSTORMS ON BOTH DAYS AS MULTIPLE WEAK UPPER LEVEL
SHORTWAVES PASS OVER THE UPPER MIDWEST. DAYTIME HIGH TEMPERATURES
WILL BE IN THE 80S WITH OVERNIGHT LOWS IN THE 60S. ..KUHL..

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z SUNDAY NIGHT)
ISSUED AT 1142 PM CDT SAT JUN 15 2013

SCATTERED SHOWERS ALONG THE HIGHWAY 20 CORRIDOR AND OVER WEST
CENTRAL IL SHOULD MOVE OUT OF THE AREA BY 09Z. A WEAK COLD FRONT
FROM NORTHEAST IOWA INTO EAST CENTRAL NEBRASKA WILL MOVE SOUTH
TONIGHT. THERE MAY BE SOME MVFR CIGS AND VSBYS IN FOG AHEAD OF THE
FRONT. DRY AIR MOVING IN AFTER THE FROPA SHOULD BREAK UP ANY LOW
CIGS AND RAISE VSBYS TO 7SM OR BETTER. VFR CONDITIONS ARE EXPECTED
SUNDAY.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...NONE.
IL...NONE.
MO...NONE.
&&

$$

SYNOPSIS...NICHOLS
SHORT TERM...NICHOLS
LONG TERM...KUHL
AVIATION...DLF