This is an independent research/prototype tool, not an official source. Warnings, watches and the official forecast for this storm come from the National Hurricane Center.
AF309 (USAF Reserve WC-130J) · 2026-09-04 15:50 – 21:49 UTC ·2 center fixes · archived observations, not a live position.
Flight-level wind:< 34 kt34–49 kt50–63 kt64–82 kt83–95 kt96–112 kt113+ ktRinged dots: center fixes (observations). Open circles: dropsonde splash points. Dashed: best track, ±12 h around the mission.
Storm-relative view
Peak 10-s flight-level wind, per passPeak SFMR surface wind, per passDropsonde splash pointEstimated centerObservations relative to the estimated storm center (best track refined by this mission’s aircraft center fixes), north up, within 150 nm; not the best track. Track colored by flight-level wind, as on the map above.
Pass 1 (17:13–17:54 UTC): flight-level RMW estimate 19 nm (distance of the peak 10-s flight-level wind, NE) — an estimate, not an analysis
Pass 2 (17:54–18:07 UTC): flight-level RMW estimate 9 nm (distance of the peak 10-s flight-level wind, NW) — an estimate, not an analysis
Pass 3 (18:07–20:13 UTC): flight-level RMW estimate 13 nm (distance of the peak 10-s flight-level wind, SW) — an estimate, not an analysis
Pass 4 (20:13–21:49 UTC): flight-level RMW estimate 15 nm (distance of the peak 10-s flight-level wind, NW) — an estimate, not an analysis
Observations along the flight
From the HDOB messages, every 30 seconds. Gaps are missing values or missing messages. Shading: a rapid-intensification episode.
Extrapolated surface pressure and peak flight-level wind
Center fixes (observations), minimum sea-level pressure:Dropsonde-measured
SFMR surface wind and rain rateFlight-level temperature and dewpointAircraft pressure and geopotential height