Forecast for Saturday, June 19

Issued: Saturday, June 19 Launch Weather Officer: 2Lt. Travis Longmire, 45th Weather Squadron Synoptic Discussion: "The axis of the Subtropical Ridge has moved south resulting in increased instability and improved conditions for thunderstorm development. With weak steering flow aloft the storms that develop will have very little movement. The Cape will see isolated showers and thunderstorms forming west of the Indian river with the onset of the sea breeze, throughout the afternoon hours. "The primary concern on launch day will be isolated showers and thunderstorms building back over launch pad 17B early in the launch countdown." Clouds: Few at 1,500 feet with 1/8ths sky coverage; Broken at 2,500 feet with 2/8ths sky coverage; Broken at 25,000 feet with 5/8ths sky coverage Visibility: 10 miles Launch Pad Winds: Southwesterly from 220 degrees at 8 gusting to 12 knots Temperature: 81 to 83 degrees F Relative Humidity: 75 percent Weather: Vicinity rain showers and thunderstorms Probability of Violating Weather Constraints: 30 percent Concerns: Anvil Cloud Rule, Cumulus Cloud Rule and flight through precipitation

24- and 48-hour Delay Forecasts

Sunday's Probability of Violating Constraints: 60 percent Concerns: Anvil Cloud Rule, Cumulus Cloud Rule and flight through precipitation Monday's Probability of Violating Constraints: 70 percent Concerns: Anvil Cloud Rule, Cumulus Cloud Rule and flight through precipitation