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ViaSat-3.1 - L-1 Day

Falcon Heavy

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Valid Period

Apr 30, 2023 23:24 - 00:31 UTC (19:24 - 20:31 ET)

Issued

Sat Apr 29, 2023 at 12:00 UTC (08:00 ET)

Forecast Discussion

Space Launch Delta 45

A two-pronged severe weather threat is expected over the next 24 hours or so. Later today, expect storms to fire up first along the east coast seabreeze early in the afternoon, then with an upper-level disturbance aided west coast sea breeze and squall line combo roll west to east across the peninsula late afternoon. Expect numerous showers and storms across the Spaceport into the early evening hours, with severe storms not out of the question as this activity interacts with the east coast sea breeze. There will be a lull in activity for a few hours overnight before the cold front sweeps through with a line of storms late tonight. Conditions look favorable for another round of strong to severe storms as the front arrives around sunrise. Showers and storms should clear the area just after midday with drier air and quieter weather filtering in by the evening. The only weather concern for the primary launch window early Sunday evening will be Liftoff Winds due to the tightening pressure gradient. The quiet post-frontal weather continues into Monday. Tight gradient between a weak high over the Gulf and massive storm system over the Great Lakes and New England continues the breezy west-southwest flow. The weather concern for the backup launch window Monday evening will remain Liftoff Winds.

Primary Launch Date

Launch Day

Primary Window

80%
PGO

Primary Concerns

  • Liftoff Winds

Additional Risk Criteria

CriteriaRisk Level
Upper-Level Wind ShearLow-Mod
Booster Recovery WeatherN/A
Solar ActivityLow

Backup Opportunities

24-Hour Delay

Backup Window

95%
PGO

Primary Concerns

  • Liftoff Winds

Additional Risk Criteria

CriteriaRisk Level
Upper-Level Wind ShearLow-Mod
Booster Recovery WeatherN/A
Solar ActivityLow