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AF309 0912E

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) · 2026-09-07 02:47 – 08:36 UTC ·3 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 (04:34–05:14 UTC): flight-level RMW estimate 16 nm (distance of the peak 10-s flight-level wind, NE) — an estimate, not an analysis
Pass 2 (05:14–06:56 UTC): flight-level RMW estimate 16 nm (distance of the peak 10-s flight-level wind, SW) — an estimate, not an analysis
Pass 3 (06:56–08:01 UTC): flight-level RMW estimate 17 nm (distance of the peak 10-s flight-level wind, NW) — an estimate, not an analysis
Pass 4 (08:01–08:36 UTC): flight-level RMW estimate 16 nm (distance of the peak 10-s flight-level wind, SE) — an estimate, not an analysis

Observations along the flight

From the HDOB messages, every 30 seconds. Gaps are missing values or missing messages.

Extrapolated surface pressure and peak flight-level wind

Center fixes (observations), minimum sea-level pressure:Dropsonde-measured

SFMR surface wind and rain rate

Flight-level temperature and dewpoint

Aircraft pressure and geopotential height

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