Area Forecast Discussion
Issued by NWS Cleveland, OH

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS61 KCLE 211615
AFDCLE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CLEVELAND OH
1215 PM EDT THU AUG 21 2014

.SYNOPSIS...
A WARM FRONT OVER THE MIDWEST WILL SLOWLY MOVE NORTHEAST TO NEAR
LAKE ERIE THIS WEEKEND. THE FRONT WILL LIKELY STALL AND REMAIN IN
THE AREA INTO EARLY NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
STRONG WARM ADVECTION OVER THE MIDWEST IS BEING BLOCKED BY THE
UPPER LOW OVER THE EASTERN GREAT LAKES...AT LEAST FOR THE TIME
BEING. THE WESTERLY FLOW ALOFT WILL ENABLE THE SHOWERS AND
THUNDERSTORMS OVER INDIANA AND WESTERN OHIO TO SLIDE EAST INTO THE
FORECAST AREA THIS AFTERNOON AS THAT CLUSTER OF STORMS HAS
ESSENTIALLY BECOME A MID LEVEL CONVECTIVE VORTEX. THE BEST CHANCE
FOR WIDESPREAD SHOWERS/STORMS WOULD SEEM TO BE FROM AROUND
FINDLAY TO MANSFIELD TO CANTON AND POINTS SOUTHEAST. THE HEAVIEST
MAY SLIDE JUST SOUTH OF THE FORECAST AREA.

THERE IS ALREADY ENOUGH CAPE AND LOW LEVEL MOISTURE THAT
CONVECTION WILL POP US ELSEWHERE BUT PROBABLY IN A MORE RANDOM
FASHION FROM OUTFLOW BOUNDARIES OR OTHER CONVERGENCE SOURCES.
THERE MAY BE ENOUGH DEBRIS CLOUDS TO SUPPRESS THE ACTIVITY FOR A
WHILE. THERE WILL LIKELY BE A LAKE SHADOW UP THE EAST LAKESHORE
THAT MAY PROTECT ASHTABULA AND ERIE FROM ANY NEW CONVECTION FOR A
WHILE BUT NO GUARANTEES. NOT MUCH SHEAR ALOFT BUT NOT AS WARM
ALOFT AS ONE MIGHT GUESS...THE FREEZING LEVEL IS GENERALLY BETWEEN
13-14K. CANNOT RULE OUT A FEW ENERGETIC THUNDERSTORMS BUT AS HAS
BEEN THE CASE THE RAIN IS MORE OF A THREAT. IF WE GET ANY TRAINING
THEN THERE COULD BE LOCALIZED FLOOD PROBLEMS.

THE HUMID AIR MASS AND INCREASING CLOUDS SHOULD HELP TO KEEP
TEMPS FROM RISING TOO MUCH. EXPECT HIGHS FROM UPPER 70S TO THE LOWER
80S...MAYBE A FEW MID 80S WHERE THERE IS THE MOST SUNSHINE. LOWERED
FORECAST HOURLY AND MAX TEMPERATURES ACROSS THE SOUTHWEST COUNTIES WHERE
IT WILL STAY CLOUDIEST WITH THE MOST SHOWERS.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY NIGHT/...
THE FRONT WILL REMAIN STALLED OVER OR NEAR THE AREA THRU SUN NIGHT
TO CONTINUE TO PROVIDE A FOCUS FOR CONVECTION. AS WAVES OF
CONVECTION OCCUR THE THREAT FOR FLOODING WILL REMAIN HIGHER THAN
NORMAL. NEXT ROUND OF HEAVY RAIN MAY HOLD OFF UNTIL LATE TONIGHT
INTO FRI WITH A COMPLEX THAT DEVELOPS OVER WI/NRN IL AND MOVES ESE
INTO THE CWA THEN END OF TONIGHT AND FRI. SOME OF THESE STORMS IN
THE WEST COULD BE SEVERE TONIGHT AND FRI.

SAT INTO SAT NIGHT SOMEWHAT DRIER AIR IS SHOWN MOVING OVER THE AREA
SO THIS TIME PERIOD MAY BE THE BEST SHOT AT SEEING THE LEAST AMOUNT
OF CONVECTION. SAT AND SUN HAVE THE BEST POTENTIAL TO BE VERY WARM
DAYS...ESPECIALLY IN THE SW IF ENOUGH SUNSHINE CAN OCCUR. HIGHS
THESE DAYS IN THE SW MAY BE NEAR 90 DEGREES.

&&

.LONG TERM /MONDAY THROUGH WEDNESDAY/...
THE UPPER LEVEL RIDGE WILL CONTINUE TO INCREASE ITS INFLUENCE ON THE
AREA INTO AT LEAST TUESDAY. AFTERNOON HEATING AND ANY LOCALIZED
CONVERGENCE MAY BE ABLE TO CAUSE A FEW AFTERNOON/EVENING
THUNDERSTORMS. BY WEDNESDAY THE RIDGE SHOULD BE BREAKING DOWN AND
START TO GET NUDGED EASTWARD AS A TROUGH DIGS INTO THE NORTHERN
PLAINS. THIS MAY MEAN INCREASING THUNDERSTORM CHANCES FOR WEDNESDAY.

THE REGION WILL CONTINUE TO SEE THE LONGEST STRETCH OF WARM AND
HUMID AIR OF THE SEASON. HIGHS WILL REMAIN ABOVE AVERAGE WITH MIDDLE
AND UPPER 80S COMMON. SLIGHTLY COOLER NEAR THE LAKESHORE.

&&

.AVIATION /12Z THURSDAY THROUGH MONDAY/...
THERE STILL MAY BE SOME PATCHY MVFR FOG WITH THE INITIAL MIX THIS
MORNING BUT MOST LOCATIONS WILL BE UNAFFECTED. THE MOVEMENT OF A
WARM FRONT THAT IS LOCATED FROM CENTRAL ILLINOIS INTO SOUTHWEST
OHIO WILL BECOME THE MAIN CONCERN FOR THE REMAINDER OF THE
FORECAST.

THE ATMOSPHERE REMAINS MOIST WITH LIFT EXPECT NEAR AND NORTH OF
THE WARM FRONT. SHOWERS AND THUNDERSTORMS MAY CLIP THE
SOUTHWESTERN PORTION OF THE REGION NEAR KFDY THIS MORNING INTO THE
AFTERNOON. OVER THE REMAINDER OF THE AREA THIS AFTERNOON THERE
SHOULD BE ENOUGH HEATING TO ALLOW FOR SOME SCATTERED CONVECTIVE
DEVELOPMENT...MAINLY FROM KCLE EASTWARD ACROSS KCAK INTO THE KYNG
AREA. TRIED TO TIME THIS INTO THESE SITES. THE MAIN SHOW LOOKS AS
IF IT WILL OCCUR AFTER MIDNIGHT INTO FRIDAY MORNING AS AN MCS
DEVELOPS AND MOVES INTO NW OHIO. LOCATIONS FURTHER EAST WILL BE IN
ITS PATH BEYOND 12Z ON FRIDAY.

OUTLOOK...NON VFR POSSIBLE IN SHOWERS/THUNDERSTORMS THROUGH
FRIDAY NIGHT.

&&

.MARINE...
A WARM FRONT WILL BE LOCATED OVER OHIO INTO THE WEEKEND. THIS
OCCURRING AS HIGH PRESSURE SLOWLY BUILDS IN THE MIDDLE LEVELS OF THE
ATMOSPHERE INTO THE WEEKEND. THIS SHOULD MEAN FAIRLY LIGHT WINDS
THROUGH THE PERIOD WITH WINDS ATTEMPTING TO BECOME ONSHORE EACH
AFTERNOON. A LAND BREEZE IS ANTICIPATED EACH NIGHT. WAVES WILL BE 2
FEET OR LESS AWAY FROM THE THUNDERSTORMS. THE BEST CHANCES FOR
THUNDERSTORMS WILL BE TONIGHT INTO THE FIRST HALF OF FRIDAY.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...NONE.
PA...NONE.
MARINE...NONE.

&&

$$
SYNOPSIS...KOSARIK
NEAR TERM...KOSARIK
SHORT TERM...ADAMS
LONG TERM...MULLEN
AVIATION...MULLEN
MARINE...MULLEN






USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.