Wind speed probabilities
NHC’s wind speed probabilities are not reported for this advisory.
Category 4 Hurricane Simon
Current advisory context · 125 kt · 144 mph · 942 hPa · N at 4 kt
Storm Mode · NHC Advisory 12 ·
Historical advisory selected · current imagery and impacts are not attached
Replay uses retained source bytes. Recording begins with activation; missing history is not clear weather.
Live sources keep independent clocks.
Replay coverage and interpretation
Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.
Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.
No observed replay frame displayed.
Open the complete replay reader (works without scripting or WebGL)
Published advisory track · Advisory 12
Observed imagery loads separately from the advisory. The base map is not observed satellite imagery.
The cone describes center uncertainty; impacts can extend outside it.
MaverickWX map · Data: NOAA/NHC · not an official graphic
Use Forecast above to pin an official issuance and valid point. The forecast table and advisory history remain available below.
Place impacts and official products
Historical impact manifests are unavailable. Newer impacts are not attached to this record.
NHC’s coastal watches and warnings
The advisory’s watches and warnings are not reported.
Potential impacts and monitoring context
No supported U.S. monitoring areaCurrent warnings in the monitoring area
None: no U.S. state or territory is under NHC’s coastal watches or warnings or inside the cone, Advisory 12. Current geographical context; these alerts are not attributed to the cyclone and are not part of the historical advisory.
No U.S. area
No U.S. state or territory is under NHC’s coastal watches or warnings or inside the cone. The storm’s own panels are shown, and no NWS alert is listed.
Official forecast table
Official forecast positions and intensity
NHC Advisory 12 · advisory · forecast cycle . Forecast positions are future estimates, not observed imagery. Classification is shown only where published.
| Valid time / lead | Position | Classification | Sustained wind |
|---|---|---|---|
+0 h from forecast cycle | 17.0°N, 104.6°W | hurricane | 120 kt · 138 mph |
+3 h from forecast cycle | 17.2°N, 104.6°W | hurricane | 125 kt · 144 mph |
+12 h from forecast cycle | 17.8°N, 104.7°W | hurricane | 135 kt · 155 mph |
+24 h from forecast cycle | 18.8°N, 104.9°W | hurricane | 135 kt · 155 mph |
+36 h from forecast cycle | 20.0°N, 105.1°W | hurricane | 120 kt · 138 mph |
+48 h from forecast cycle | 21.7°N, 105.3°W | hurricane | 70 kt · 81 mph |
+60 h from forecast cycle | 23.1°N, 105.6°W | post tropical cyclone | 30 kt · 35 mph |
Advisory history and records
Retained advisory records
Return to latest advisoryEach entry selects one immutable snapshot. Intermediate, special and corrected records are separate identities where retained. Current NWS context is labelled separately. Historical impact manifests are not retained by this index; newer impacts are never attached to an earlier advisory. Same-time corrections replaced in the publisher’s index cannot be selected unless still listed.
Monitoring geography and current changes
- Area
- None: no U.S. state or territory is under NHC’s coastal watches or warnings or inside the cone, Advisory 12
Coastal watches and warnings: none in a U.S. state · Cone: crosses no U.S. state - Hazards
- —
- Window
- In force now, with this advisory’s forecast
- Made by
- NHC’s own products, as this site’s pipeline published them, read again with each new advisory. Watch another area
The storm’s area, by its warning centre’s products: everything listed is in force in this area, never “from this storm”.
All published products and source descriptions
Forecast track
The official forecast track, drawn by this site from NHC’s Advisory 12 (). Not an official NHC product. Data: NOAA/NHC. NHC’s own.
Intensity forecast
The official intensity forecast, drawn by this site from NHC’s Advisory 12 (). Not an official NHC product. Data: NOAA/NHC. NHC’s own.
Satellite
The storm’s page shows it on the satellite, loaded by your browser.
Imagery from NASA GIBS: NOAA GOES and JMA Himawari.
Model guidance
The models’ tracks, which are not a forecast, drawn by this site from NHC’s Advisory 12 (). Not an official NHC product. Data: NOAA/NHC. NHC’s own.
Radar
NOAA’s radar for the area, loaded by your browser as on the Radar page.
Live tiles; the radar keeps no last-good copy.
Sources
NHC advisory, as published checked
Radar live tiles, no last-good copy
Not an official warning service. Warnings and watches are the National Weather Service’s, outlooks and reports the Storm Prediction Center’s and the Weather Prediction Center’s (Data: NOAA/NWS, NOAA/SPC, NOAA/WPC). When a warning is issued for you, act on it, and use weather.gov or a NOAA Weather Radio for where you are.