Cloudy and muggy early… With more sunshine than we’ve had over the last few days, we will be close to the record high for Dothan set in 1976… 80 degrees! With more unseasonably warm days ahead… Here’s the NWS Discussion…
AREA FORECAST DISCUSSION...updated for dense FOG ADVISORY NATIONAL WEATHER SERVICE TALLAHASSEE FL 602 AM EST Wed Feb 29 2012 WIDESPREAD dense fog has developed across portions of the inland big bend and over most of s/CNTRL ga. AS a result a dense fog advisory has been issued for these areas until 9 am est for these areas. expect widespread vsbys one-half mile or below. the fog will slowly then more rapidly lift after 9 am est. During the next 24 HRS, a large trough expands from the extreme ERN Pacific to the West Coast. In response, the deep-layer low over the NE will lift and weaken across Nrn MS Valley then into the Great Lakes region tonight with 90kt JET at base crossing OH Valley. In response, Gulf RIDGE will expand NWD today with rising heights. South of these troughs/low systems, very fast WSW nearly zonal FLOW will moves across much of Cntrl and SRN tier states west of Gulf. As Wrn upper trough swings in wrn states on Thurs, broad and weak ridging moves across SE region. Trough advances into the Plains on Fri with strong SHORTWAVE developing out ahead with weak and weakening ridging over Nrn Gulf. AT LOWER LEVELS... Surface HIGH PRESSURE is centered over over the MID Atlantic coast and is ridging southward to FL and then WWD along the Gulf Coast. Plenty of low level MOISTURE is in place across the region with DEW points in the upper 50s east to lower 60s west. Looking UPSTREAM, a low was noted across Srn MN assocd with above Plains trough. Cold FRONT extended from low SWWD into TX. During the next 24 hrs, as upper low lifts NEWD, surface REFLECTION lifts newd and eventually occludes over Srn ONT/New England on Thurs. Trailing front will cross OH/TN Valleys later today oriented from Appalachians SWWD THRU Nrn AL/GA by tonight where it becomes quasi-STNRY. High along East coast shifts into Wrn Atlc with ridge nudged SWD and across FL Peninsula. Meanwhile, the fast zonal flow along the Nrn Gulf Coast and an upper ridge over the Gulf will prevent the front from making much more significant southward progress. This should keep the best RAIN chances north of the forecast area on Wednesday. Remains of the cold front will edge SWD on Thursday, which may help to spark slightly better coverage of afternoon showers and thunderstorms Nrn counties. As above upper trough advances EWD on Fri, wrn tail of front initially lifts nwd as warm front to Nrn AL. Then, as next and deeper surface low tracks from Srn Plains to Mid MS Valley then to Great Lakes Fri thru Fri NIGHT, the cold front dragged back SEWD to just N of CWFA by nighttime. In response, Gulf ridge retreat ewd. Shortwave will push front across local area SAT into Sat night for our next weather maker (see long term discussion). .SHORT TERM (TODAY THRU FRIDAY)... It will be unseasonably warm thru the period with MAX TEMPS about 10 degrees above NORMAL and approaching near record levels. With a weak surface GRADIENT, some sea breeze development is expected each day which may yield a sprinkle or two and will account for noticeably cooler coastal temps. TODAY...lingering areas to widespread dense fog for a FEW hours, mainly ern third of area. then after fog breaks, temps will soar. Highs low 70s coast to around 80 inland. No POPS. record high for Feb 29...Tallahassee (1948) and Tift, 84, Cross City 82, Headland AL and Albany 80 and Apalachicola and Marianna 76 degrees. TONIGHT...20% pops SE AL/SW GA Zero elsewhere. Lows from upper 50s SE Big Bend, low-mid 60s. fog developing late. THURSDAY...20% pops SE AL/SW GA Zero elsewhere. Highs low 70s coast to around 80 inland. Lows 58-62. FRIDAY....20% pops SE AL/SW GA Zero elsewhere. Highs low 70s coast to low 80s inland. && .LONG TERM...(FRIDAY NIGHT THROUGH WEDNESDAY). The period begins with a rapidly occluding STORM system across the Great Lakes with a cold front gradually progressing into the Southeast. The 29/00z model guidance is in relatively good agreement with the timing of this system into the Southeast. Both the GFS and Euro indicate that the primary surface low and attendant upper level energy will be rapidly shifting northeastward up the Saint Lawrence River Valley and into the Canadian Maritimes by Saturday night. As a result, it doesn`t appear as though the cold front will come roaring through Saturday evening into Sunday morning. What little difference there is between the GFS and Euro is with regard to whether the frontal boundary develops a wave of low pressure along it while nearing the area. The Euro solution is slightly more robust with this feature and accordingly has much better rain chances as the cold front comes through. One way or the other it does look like most areas will have a good shot at RAINFALL on Saturday-Saturday night so will increase pops from the inherited values. Severe potential with this system is more uncertain. While SHEAR and surface-based INSTABILITY look to be sufficient for organized severe weather, the lack of significant HEIGHT falls implies that deep layer forcing may be lacking with this system, leaving most of the CONVECTION in a narrow band along the surface frontal boundary. Even with the meager height falls, there still looks to be enough potential for severe weather to warrant watching this system closely over the next couple of days as it nears the area. Beyond Sunday as the cold front comes through, high pressure will build across the area at the surface and then gradually aloft. Primary difference in this period of the forecast is the 29/00z GFS indicating a very strong surface ridge building across the Mid Atlantic whereas the Euro keeps the surface high nearly overhead into Tuesday. Continuity favors the Euro solution here. Temperatures will initially trend below normal behind the cold front from Sunday evening into Tuesday with a moderating trend developing by Wednesday ahead of the next storm system.




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Wednesday, February 29th, 2012 5:44 am at 5:44 am
Linda Hodges
Photo needs to be updated. Martha Spencer still in pic.
Wednesday, February 29th, 2012 10:06 am at 10:06 am
4warnwxteam
Will do. Thanks!