Forecast for Thursday, July 17

Issued: Monday, July 14 Launch Weather Officer: Jim Sardonia, 45th Weather Squadron Synoptic Discussion: "A daily pattern of afternoon convection over the interior portions of Florida will remain in place all week. Rainshowers and scattered thunderstorms will develop each day in the early afternoon hours primarily west of Cape Canaveral along the I-95 corridor. Steering flow this week will move these storms to the west generally and away from Cape Canaveral. Upper-level winds may carry thunderstorm Anvil clouds back across the east coast of Florida during the late afternoon and evening hours today through Wednesday. "On launch day (Thursday), winds aloft are expected to be easterly throughout the entire atmosphere carrying both the inland thunderstorms and associated Anvil clouds to the west and away from SLC 41. However, southeasterly low-level winds will produce a chance of scattered coastal rainshowers along the coast. Some of these rainshowers may violate the Cumulus Cloud Rule during the launch countdown. "Conditions worsen slightly in the event of a 24 and 48-hour delay as the upper-level winds switch back to a westerly component increasing the chance of Anvil clouds overhead in the late afternoon hours of Friday and Saturday. "The main concern for Launch Day will be the chance of enhanced Cumulus clouds from coastal rainshowers within 10 nm of SLC 41." Clouds: Scattered Cumulus at 4,000 feet with 2/8ths sky coverage and tops at 8,000 feet; Scattered Cumulus at 25,000 feet with 3/8ths sky coverage and tops at 27,000 feet Visibility: 7 miles or better Launch Pad Winds: Southeasterly from 120 degrees at 12 gusting to 18 knots (as measured at 230 feet) Temperature: 80 to 82 degrees F Relative Humidity: 75 percent Weather: Chance of scattered coastal rainshowers Solar Activity: Low-moderate Probability of Violating Weather Constraints: 30 percent Concerns: Chance of Coastal Rainshowers and Enhanced Cumulus Clouds within 10 nautical miles

24- and 48-hour Delay Forecasts

Friday's Probability of Violating Constraints: 40 percent Concerns: Chance of Anvil Clouds and Enhanced Cumulus Clouds within 10 nautical miles Saturday's Probability of Violating Constraints: 40 percent Concerns: Chance of Anvil Clouds and Enhanced Cumulus Clouds within 10 nautical miles