Events

Iselle

EP092026 · 2026 · Aug 21, 2026 – Aug 27, 2026. 3562 stored fixes. Operational NHC b-deck and, when present, the public a-deck. The b-deck is revised after the season. HURDAT2 is the later final track and is not ingested yet.

Track and intensity

Miles are great-circle statute miles. Intensity error is the absolute difference in knots. The baseline is the NHC official forecast (OFCL). Model aids are the early-cycle trackers in the public a-deck: GFS (AVNO), GEFS mean (AEMN), Canadian GEM (CMC), UKMET (UKX), HAFS, HWRF, HMON, and NAVGEM when that storm’s file contains them. ECMWF and AIFS trackers were not in the public a-deck when this was checked, so they are absent rather than filled in.

SourceLeadCasesTrackTrack skillIntensityIntensity skill
GEFS mean 24 h 11 36 mi -0.06 6 kt -0.34
GEFS mean 48 h 7 49 mi -0.41 3 kt +0.67
GEFS mean 72 h 3 66 mi -1.37 7 kt +0.51
GFS 24 h 11 45 mi -0.30 4 kt +0.12
GFS 48 h 7 75 mi -1.16 7 kt +0.33
GFS 72 h 3 127 mi -3.56 20 kt -0.31
Canadian GEM 24 h 6 36 mi -0.10 10 kt -1.44
Canadian GEM 48 h 4 29 mi +0.11 8 kt +0.22
Canadian GEM 72 h 2 39 mi -0.06 8 kt +0.51
HAFS-A 24 h 11 33 mi +0.04 4 kt +0.08
HAFS-A 48 h 7 23 mi +0.32 6 kt +0.36
HAFS-A 72 h 3 56 mi -1.03 7 kt +0.53
HAFS-B 24 h 11 32 mi +0.07 6 kt -0.34
HAFS-B 48 h 7 33 mi +0.05 8 kt +0.23
HAFS-B 72 h 3 55 mi -0.96 11 kt +0.29
HMON 24 h 11 57 mi -0.65 5 kt -0.04
HMON 48 h 7 78 mi -1.26 4 kt +0.60
HMON 72 h 3 65 mi -1.33 11 kt +0.29
HWRF 24 h 11 52 mi -0.50 5 kt -0.04
HWRF 48 h 7 74 mi -1.12 4 kt +0.63
HWRF 72 h 3 51 mi -0.85 13 kt +0.11
NAVGEM 24 h 11 85 mi -1.49 18 kt -3.02
NAVGEM 48 h 7 137 mi -2.94 7 kt +0.31
NAVGEM 72 h 3 194 mi -5.96 11 kt +0.24
NHC official 24 h 11 34 mi — 5 kt —
NHC official 48 h 7 35 mi — 10 kt —
NHC official 72 h 3 28 mi — 15 kt —
UKMET 24 h 6 77 mi -1.34 8 kt -0.96
UKMET 48 h 4 142 mi -3.40 11 kt -0.07
UKMET 72 h 2 181 mi -3.89 11 kt +0.37

Landfall

Location error is statute miles. Timing error is hours. A landfall is scored only when an explicit landfall row is stored. This version does not infer one from the track crossing a coastline.

No explicit landfall is on file for this storm.

Local impact in a market

Rainfall, peak wind, and surge forecasts for a station’s own market belong here, including ranges. Station websites are not collected, so this card does not invent a local total.

No local-impact forecast is stored for this storm.