Sandhill Weather- Olin,Iowa USA

Updated:  Sun, 14-Mar-2010 1:55pm CDT 
  Sunny, Dry Temperature: 56.8°F   /hr Humidity: 64% Dew Point: 44.7°F Wind: NE  20.5 mph Gust: 23.0 mph Pressure: 29.897 inHg  Steady Rain Today: 0.00 in UV-index: 0.0  None

000
FXUS63 KDVN 140802
AFDDVN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
302 AM CDT SUN MAR 14 2010

.SYNOPSIS...
LARGE STORM SYSTEM IN THE EASTERN UNITED STATES WITH THE DVN CWA
STILL IN THE GRIPS OF THE CYCLONIC FLOW...WITH LOW CLOUDS AND PATCHY
DRIZZLE AS WE BEGIN CDT. TEMPERATURES CURRENTLY IN THE LOWER TO MID
40S. SOME DRIER AIR WAS MAKING ITS WAY OUT OF THE NORTHERN GREAT
LAKES WITH CLEAR TO PARTLY CLOUDY SKIES ACROSS CENTRAL AND NORTHEAST
WISCONSIN. ..HAASE..

&&

.SHORT TERM...TODAY AND TONIGHT...
FORECAST FOCUS ON CLOUDS AND TEMPERATURES.
WITH CYCLONIC FLOW IN PLACE AROUND LARGE STORM IN THE EASTERN UNITED
STATES LOW CLOUDS WILL HANG TOUGH FOR MUCH OF TODAY. DOPPLER RADAR
AND SOME SURFACE OBS INDICATED AREAS OF DRIZZLE AT THIS TIME SO WILL
MENTION THIS MORNING. MAY SEE SOME BREAKS IN THE OVERCAST LATER THIS
AFTERNOON IN OUR NORTHERN CWA AS SOMEWHAT DRIER AIR WORKS OUT OF
CENTRAL WISCONSIN. MAX TEMPERATURES SHOULD BE AROUND 50 TODAY...A
LITTLE WARMER COMPARED TO YESTERDAY BUT CLOUD COVER AND NORTHEAST TO
NORTH WINDS WILL PREVENT MUCH OF A WARMUP. WILL GO CLOSER TO THE
COOLER MAV GUIDANCE DUE TO CLOUD COVER. ENOUGH OF A GRADIENT TO GET
SOME WIND GUSTS TO AROUND 25 MPH...BUT THIS SHOULD DIMINISH LATER
THIS AFTERNOON.

TONIGHT...AS STORM SYSTEM OUT EAST MOVES FARTHER AWAY THE CYCLONIC
FLOW WILL BEGIN TO RELAX. WINDS WILL TURN MORE TO THE NORTH TO
NORTHWEST ALLOWING DRIER AIR TO SPREAD SOUTHWARD. CLOUDS SHOULD THEN
DECREASE FROM NORTH TO SOUTH AS THE NIGHT PROGRESSES. THIS WILL
ALLOW MIN TEMPS TO DIP INTO THE MID TO UPPER 30S AT MOST LOCATIONS.

..HAASE..

.LONG TERM...MONDAY THROUGH SATURDAY...
A MILD WEEK IS SHAPING UP WITH A SLIGHT CHANCE OF LIGHT RAIN MAINLY
TUESDAY NIGHT...AND A BETTER CHANCE OF RAIN...POSSIBLY EVEN A LITTLE
SNOW...FRIDAY-SATURDAY.

LOW LEVEL NORTHERLY FLOW PERSISTS THROUGH MUCH OF THE WEEK...BUT
DRIER AIR FILTERING INTO THE REGION SHOULD ALLOW SOME SUNSHINE FOR
WARMER TEMPS MONDAY-WEDNESDAY.  A WEAK SHORTWAVE TROUGH IS PROGGED
IN THE AREA TUESDAY NIGHT INTO EARLY WEDNESDAY...BUT EACH MODEL IS
UNIQUE IN ITS SOLUTION FOR BRINGING THE WAVE THROUGH THE AREA.  SO
KEPT POPS AND QPF BOTH ON THE LOW SIDE AS THIS SHOULD BE A LOW
IMPACT SYSTEM REGARDLESS OF WHICH MODEL ENDS UP VERIFYING.

ON THURSDAY...THE UPPER LEVEL RIDGE BUILDS OVER THE AREA AS THE
SURFACE RIDGE SLIDES EAST ALLOWING SOUTHWESTERLY LOW-LEVEL FLOW TO
START ADVECTING WARMER AIR INTO THE REGION.  THE GFS AND ECM DIFFER
IN MOVING THE UPPER LEVEL TROUGH AND SURFACE COLD FRONT THROUGH THE
MIDWEST FRIDAY-SATURDAY. THE 00Z GFS IS MUCH MORE AGGRESSIVE THAN
THE ECM AND GEM INDICATING DECENT CYCLOGENESIS ASSOCIATED WITH A
NEGATIVELY TILTED UPPER LEVEL TROUGH AND FASTER COLD FRONTAL
PASSAGE.  HOWEVER...THE GFS ENSEMBLE MEAN TRENDS MORE TOWARD THE
SLOWER AND RELATIVELY WEAKER ECM/GEM SOLUTIONS.  ALL MODELS AGREE IN
BRINGING IN SOME CHILLY 850MB TEMPS...HENCE THE SNOW POSSIBILITIES.
..WOLF..

&&

.AVIATION...
MVFR CIGS TODAY BECOMING VFR CONDS TONIGHT. NORTHEAST TO NORTH WINDS
10 TO 15 KNOTS WITH OCNL GUSTS TO AROUND 20 KNOTS TODAY. NORTH TO
NORTHWEST WINDS LESS THAN 10 KNOTS TONIGHT.

..HAASE..

&&

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

&&

$$

HAASE/WOLF

NWS DVN Office Area Forecast Discussion