Area Forecast Discussion
Issued by NWS Melbourne, FL
Issued by NWS Melbourne, FL
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968 FXUS62 KMLB 031016 AFDMLB Area Forecast Discussion National Weather Service Melbourne FL 616 AM EDT Mon Jun 3 2024 ...New DISCUSSION, MARINE, FIRE WEATHER... .DISCUSSION... Issued at 615 AM EDT Mon Jun 3 2024 Key Messages: - Fire sensitive conditions continue with a moderate drought - Shower and storm chances increase mid-to-late week - Temperatures rise mid-to-late week with Heat Index values in the 100 to 108 degree range Currently-Today... Current radar imagery shows mostly dry conditions across east central Florida. A shortwave trough is situated to the northeast of Florida over the Carolinas. High pressure remains in control at the surface over the western Atlantic with a mid/upper level ridge building over the western Gulf of Mexico. Today will be similar to yesterday with most of the convection expected to develop to the west of central Florida over west Florida as predominate onshore easterly flow continues over east central Florida. Therefore, PoPs have been reduced from the NBM significantly (PoPs ~ 20-40% over the interior and Treasure Coast) with the greatest forcing expected again to the west of central Florida this afternoon. Isolated showers are forecast along the Treasure Coast (PoPs ~ 20%) this morning with scattered showers and isolated lighting storms forecast this afternoon over the western interior, as well as the Treasure Coast. The main hazards associated with lighting storms this afternoon will be occasional cloud-to-ground lightning strikes and gusty winds. Easterly winds will increase into the afternoon at 10-15mph with gusts to 20-25mph. Afternoon highs are forecast to reach the mid 80s to low 90s under mostly to partly sunny skies. Tonight... Rain chances dwindle this evening and into the overnight hours with a slight chance for showers (PoPs~ 15-20%) along Martin and St. Lucie counties overnight. Overnight lows are expected to drop into the mid 60s to low 70s with partly cloudy skies. Tuesday-Thursday... The forecast will remain similar through Tuesday with high pressure over the western Atlantic, a mid/upper level ridge building over the Southeastern US, and onshore easterly flow in place. The NBM is persistent in higher PoPs than MOS and global model guidance so PoPs have been significantly reduced through Wednesday. Afternoon diurnally driven isolated to scattered showers and isolated lightning storms are forecast Tuesday (PoPs ~20-40%). Guidance signals that a weakness in the ridge will develop Wednesday with an increase in moisture ahead of a shortwave trough Thursday. Slightly higher rain and lightning storm chances are forecast Wednesday as a result, although the greatest chance for rain is expected again over the interior, as well as the Treasure Coast (PoPs ~30-50%). East winds are forecast to increase each afternoon at 10-15mph with gusts to 20-25mph. Afternoon highs in the upper 80s to mid 90s are expected with lows in the upper 60s to mid 70s. The weather pattern shifts on Thursday with a major shortwave trough forecast to track over central Florida into Thursday afternoon. Scattered showers and lightning storms are forecast into the afternoon (PoPs ~ 40-60%) and evening with storms capable of occasional to frequent lighting strikes, gusty winds, and moderate to brief heavy rainfall. Temperatures are expected to rise Thursday with onshore flow becoming less predominate and as west-southwest flow develops into Friday. Afternoon highs are forecast to reach the low to upper 90s with heat index values slightly below heat advisory criteria. (Heat index values in the 100-107 degrees range). Friday-Sunday... Drier air is expected behind the aforementioned trough on Friday and into the weekend with a weak frontal boundary forecast to move east-southeast across east central Florida Saturday. Isolated to scattered showers and lighting storms are forecast into each afternoon with the greatest chance for rain and storms expected over the western interior, as well as over the Treasure Coast (PoPs ~ 30-50%). General lighting storms are expected at this time with guidance showing temperatures at 500mb in the -5 to -7 C range. Afternoon highs in the low to upper 90s with heat index values in the 100-108 degrees range. Lows are expected to drop into the low to upper 70s. && .MARINE... Issued at 615 AM EDT Mon Jun 3 2024 Currently-Today...Favorable boating conditions are expected with high pressure in control over the western Atlantic. Onshore east winds will increase into the afternoon at 10-14kts. Isolated to scattered showers and lighting storms are forecast this afternoon and into the early overnight hours. Seas are forecast to build to 1-3ft with up to 4ft over the offshore Brevard county waters. Tuesday-Friday... Favorable boating conditions are forecast outside of showers and lightning storms. Isolated to scattered showers and lightning storms are forecast into the afternoon and evening Tuesday, Wednesday, and Friday. Scattered showers and lighting storms are forecast Thursday which will be capable of occasional to frequent cloud to water lighting strikes and gusty winds. East winds will increase into the afternoon at 8-14kts through Wednesday and then veer south-southwest overnight Wednesday night and Thursday night before backing onshore into each afternoon. Seas are forecast to build to 1-3ft. && .FIRE WEATHER... Issued at 615 AM EDT Mon Jun 3 2024 Today-Friday... Fire sensitive conditions will continue with a moderate drought and minimal rain chances, in addition to minimum RH values in the 40-50% range over west-central Florida through Wednesday. Diurnally driven isolated showers and lightning storms are forecast each afternoon with the greatest chance over the western interior (20-40%), as well as the Treasure Coast to Okeechobee county. Rain chances increase mid to late week with scattered showers and lightning storms forecast. Minimum RH values are forecast to drop to near critical values Friday and into the weekend. East winds are expected to increase each afternoon at 10 to 15mph before west to southwest flow develops late week. && .AVIATION... (06Z TAFs) Issued at 149 AM EDT Mon Jun 3 2024 Mostly VFR through today into tonight. Ridge axis of high pressure over the west Atlantic will remain north of central FL, keeping an onshore flow across the region. A few showers possible along the Treasure Coast through early this morning. Then, isolated to scattered afternoon showers and storms will be possible along the inland moving sea breeze boundary, but greatest potential for rain looks to exist with sea breeze collision toward the western side of the FL peninsula later in the afternoon and toward sunset. Therefore, rain chances remain rather low across east central FL. Have limited any mention of this activity to VCSH or VCTS for inland TAF sites and along the Treasure Coast. However, tempo IFR/MVFR conditions will be possible should any convection develop over or move across any TAF sites this afternoon. Winds are forecast out of the east around 5-10 knots, increasing to around 10-12 knots with the sea breeze boundary as it shifts inland during the afternoon. Winds then diminish to 5 knots or less overnight tonight. && .PRELIMINARY POINT TEMPS/POPS... DAB 87 70 88 72 / 10 10 10 10 MCO 90 70 91 72 / 20 10 20 10 MLB 87 73 88 74 / 10 20 30 30 VRB 87 71 88 72 / 20 20 30 30 LEE 91 71 93 73 / 30 10 20 10 SFB 90 70 92 72 / 20 10 20 10 ORL 90 72 92 73 / 20 10 20 10 FPR 87 70 88 72 / 20 20 30 30 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && $$ DISCUSSION...Fehling AVIATION...Weitlich