Snow Advisory 4, NWS Quad Cities, IA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
355 AM CST TUE DEC 13 2005

.SYNOPSIS..
WEAK HIGH PRESSURE WILL MOVE EAST OF THE REGION TODAY WHILE A STORM
SYSTEM DEVELOPS IN THE PLAINS. THIS STORM SYSTEM WILL AFFECT THE
AREA STARTING LATE TONIGHT THROUGH THURSDAY.

&&

.SHORT TERM...TODAY AND TONIGHT...
PATCHY FOG WILL BURN OFF THIS MORNING LEAVING A QUIET REMAINDER OF
THE DAY. THE WX BEGINS TO TURN QUITE INTERESTING TONIGHT. FORECAST
SOUNDINGS INDICATE IT WILL TAKE UNTIL THE 03Z-06Z TIME PERIOD TO
SATURATE THE ATMOSPHERE WEST OF THE MISSISSIPPI. ONCE SATURATION
OCCURS...PRECIP WILL RAPIDLY BREAK OUT AS A NICE LLJ PUMPS MOISTURE
INTO THE AREA. PRECIP WILL RAPIDLY BREAK OUT ALONG AND EAST OF THE
MISSISSIPPI AFTER 06Z. ACCUMULATIONS WILL VARY AND DEPEND HIGHLY ON
WHEN THE SNOW BEGINS. CONTINUED WAA DURING THE NIGHT MAY RESULT IN
MIXED PRECIPITATION DEVELOPING SOUTH OF HIGHWAY 34 TOWARD DAWN.
...08 FOR 05...

&&

.LONG TERM...WEDNESDAY THROUGH MONDAY...
AFTER A BURST OF WAA PRECIP WEDNESDAY MORNING...THE PRECIP SHOULD
SHUT DOWN IN THE AFTERNOON FOR ALL BUT THE NORTHERN THIRD OF THE
CWFA. WAA IN THE LOW LEVELS WILL CHANGE THE PRECIP OVER TO EITHER A
LIQUID OR A LIQUID/FREEZING MIX ALONG AND SOUTH OF I-80 DURING THE
DAY. CAA WEDNESDAY NIGHT WILL ALLOW PRECIP TO BE ALL SNOW.

AMOUNTS STILL QUITE TRICKY BUT WE SHOULD END UP WITH A HIGH END
ADVISORY NORTH OF HIGHWAY 30 WITH SOME TYPE OF A LOWER END ADVISORY
DOWN TO I-80. STACKED SYSTEM WILL BE SLOW TO LEAVE THE AREA SO
PRECIP WILL CONTINUE INTO THURSDAY/THURSDAY NIGHT. DEPENDING ON HOW
FAST THIS SYSTEM REALLY MOVES...THERE MAY BE LINGER PRECIP INTO
FRIDAY. QUIET WX LOOKS TO BE IN STORE FOR THE WEEKEND.   ...08...

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...WINTER STORM WATCH 12 AM WEDNESDAY UNTIL 12 AM THURSDAY NORTH
OF HIGHWAY 30.
IL...WINTER STORM WATCH 12 AM WEDNESDAY UNTIL 12 AM THURSDAY NORTH
OF HIGHWAY 30.
MO...NONE.

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
539 AM CST TUE DEC 13 2005

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-141139-
BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO-
CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL-
HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA-
JO DAVIESS IL-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA-
MCDONOUGH IL-MERCER IL-MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL-
SCOTLAND MO-SCOTT IA-STEPHENSON IL-VAN BUREN IA-WARREN IL-
WASHINGTON IA-WHITESIDE IL-
539 AM CST TUE DEC 13 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.

...WINTER STORM WATCH FOR AREAS NORTH OF HIGHWAY 30 LATE TONIGHT
THROUGH WEDNESDAY EVENING...

.DAY ONE...TODAY AND TONIGHT

PATCHY DENSE FOG WITH VISIBILITIES LESS THAN ONE QUARTER MILE WILL
BURN OFF BY MID DAY.

TONIGHT...A STORM SYSTEM WILL BEGIN TO AFFECT THE AREA. SNOW IS
EXPECTED TO DEVELOP LATE THIS EVENING AND OVERNIGHT FROM WEST TO
EAST ACROSS THE OUTLOOK AREA. A WINTERY MIXTURE OF RAIN...SNOW...
SLEET AND FREEZING RAIN WILL BE POSSIBLE SOUTH OF HIGHWAY 34.
SNOW ACCUMULATIONS OF AN INCH OF TWO WILL BE POSSIBLE WEST OF THE
MISSISSIPPI RIVER AND NORTH OF HIGHWAY 34...WITH LESSER AMOUNTS
SOUTH AND EAST.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SNOW...POSSIBLY HEAVY AT TIMES...WILL CONTINUE THROUGH THE DAY
WEDNESDAY INTO WEDNESDAY EVENING ALONG AND NORTH OF HIGHWAY 30 WHERE
6 INCHES OR MORE OF ACCUMULATION WILL BE POSSIBLE. BETWEEN HIGHWAY 30
AND THE INTERSTATE 80 CORRIDOR...SNOW WILL MIX WITH SOME SLEET AND
FREEZING DRIZZLE DURING THE DAY. SNOW AMOUNTS IN THIS AREA WILL BE
LIGHTER...BUT CURRENT INDICATIONS ARE THAT 2 TO 4 INCHES WILL BE
POSSIBLE THROUGH WEDNESDAY EVENING. ALONG AND SOUTH OF THE HIGHWAY 34
CORRIDOR A WINTERY MIXTURE OF RAIN...SLEET AND SNOW WILL CHANGE
OVER TO DRIZZLE DURING THE DAY. SNOW ACCUMULATIONS IN THIS AREA WILL
BE LIGHT AND VARY FROM AN INCH OR TWO NEAR HIGHWAY 34 TO LITTLE OR NO
ACCUMULATION ALONG AND SOUTH OF HIGHWAY 136.

OVERNIGHT WEDNESDAY NIGHT AND THURSDAY...SNOW IS AGAIN EXPECTED
FOR THE ENTIRE AREA. ADDITIONAL LIGHT SNOW ACCUMULATIONS WILL BE
POSSIBLE...ESPECIALLY ALONG AND NORTH OF HIGHWAY 30.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT...BUT SNOWFALL
REPORTS WEDNESDAY INTO THURSDAY WILL BE APPRECIATED.