Forecast track
The official forecast track, drawn by this site from JTWC’s Warning 12 (). Not an official JTWC product. Data: JTWC. JTWC’s own.
STORM MODEWeather tracking workspace
Typhoon Champi
Current advisory context · 115 kt · 132 mph · 948 hPa · W at 13 kt
Storm Mode · JTWC Warning 12 ·
Historical advisory selected · current imagery and impacts are not attached
Published advisory track · Warning 12
Observed imagery loads separately from the advisory. The base map is not observed satellite imagery.
JTWC does not publish an NHC cone.
MaverickWX map · Data: JTWC · not an official graphic
Recorded weather · gaps are marked. Coverage begins with recording activation.
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)Choose Forecast for a pinned issuance and valid time.
Analysis
Current cached context, independently dated. Regional reference: GU; a reference within a wider monitoring area does not replace the complete warning geography. This section remains separate from the historical replay cursor and official cyclone forecast. Use Forecast to pin a retained model package.
Surface: what stations observe and WPC analyses
On the map
- Observed temperature, °F, above-left of the station
- Observed dew point, °F, below-left
- Observed temperature and dew point are left off the map on a screen this narrow: the table below lists every station’s.
- Observed wind: the staff points to where it blows from; a full barb is 10 kt, a half 5, a pennant 50; a ring is calm
- Analysis cold front
- Analysis warm front
- Analysis stationary front
- Analysis occluded front
- Analysis dry line
- Analysis trough
- Analysis high and low pressure centres, with their pressure in millibars
WPC’s bulletin does not say which side of a front its symbols go, so this map draws no triangles or half-circles; each front is named on the map and in the list.
Observed 2,322 stations, each at its own time, most between and . Airport and other automated stations’ reports (METARs), as AviationWeather.gov decodes them. Left out: 449 reports flagged by the station for maintenance and no reports that cannot be right; no other quality control is applied here.
Analysis WPC’s surface analysis valid , issued . A forecaster’s analysis of the fronts and pressure centres at that hour, every three hours.
WPC analyses no front across Guam; troughs are drawn on the map.
No current station report in Guam.
Surface observations checked · Data: NOAA/NWS Aviation Weather Center
WPC surface analysis checked · Data: NOAA/WPC
Impacts
Monitoring: GU, MPCurrent warnings in the monitoring area
U.S. territories JTWC’s forecast track passes within 300 nm of, Warning 12: Guam and Northern Mariana Islands. Current geographical context; these alerts are not attributed to the cyclone and are not part of the historical advisory.
In force in this area
No warning, watch or advisory for these hazards is in force in this area.
NWS’s alerts checked : a successful check, so this is none in force, not “can’t tell”.
Official forecast table
Forecast points
JTWC Warning 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 |
|---|---|---|---|
+12 h from forecast cycle | 13.0°N, 144.8°E | super typhoon | 130 kt · 150 mph |
+24 h from forecast cycle | 13.4°N, 142.5°E | super typhoon | 140 kt · 161 mph |
+36 h from forecast cycle | 14.1°N, 140.4°E | super typhoon | 140 kt · 161 mph |
+48 h from forecast cycle | 15.1°N, 138.3°E | super typhoon | 135 kt · 155 mph |
+60 h from forecast cycle | 16.1°N, 136.2°E | super typhoon | 130 kt · 150 mph |
+72 h from forecast cycle | 17.2°N, 133.9°E | super typhoon | 135 kt · 155 mph |
+96 h from forecast cycle | 19.3°N, 129.3°E | typhoon | 125 kt · 144 mph |
+120 h from forecast cycle | 21.1°N, 126.5°E | typhoon | 115 kt · 132 mph |
Advisory history and records
Advisory history
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.
| Official issuance | Revision kind | Record |
|---|---|---|
| JTWC Warning 21 · | advisory | Snapshot 34544bc3 |
| JTWC Warning 20 · | advisory | Snapshot 7c7a42d9 |
| JTWC Warning 19 · | advisory | Snapshot df4ad817 |
| JTWC Warning 18 · | advisory | Snapshot fee9f0ca |
| JTWC Warning 17 · | advisory | Snapshot ded1ea58 |
| JTWC Warning 16 · | advisory | Snapshot 610609f3 |
| JTWC Warning 15 · | advisory | Snapshot 8da30f44 |
| JTWC Warning 14 · | advisory | Snapshot 066b411c |
| JTWC Warning 13 · | advisory | Snapshot 7b6b7d88 |
| JTWC Warning 12 · | advisory | Snapshot adcb8e93 · Selected |
| JTWC Warning 11 · | advisory | Snapshot 0bf22ebc |
| JTWC Warning 10 · | advisory | Snapshot eea89e7f |
| JTWC Warning 8 · | advisory | Snapshot ff92eaa6 |
| JTWC Warning 7 · | advisory | Snapshot 9d193cf4 |
| JTWC Warning 6 · | advisory | Snapshot 4d09f045 |
| JTWC Warning 5 · | advisory | Snapshot 7447d924 |
| JTWC Warning 4 · | advisory | Snapshot 2d609133 |
| JTWC Warning 3 · | advisory | Snapshot d96ff9c8 |
| JTWC Warning 2 · | advisory | Snapshot d99cea2d |
| JTWC Warning 1 · | first | Snapshot 99aef0d4 |
Monitoring geography and current changes
- Area
- U.S. territories JTWC’s forecast track passes within 300 nm of, Warning 12: Guam and Northern Mariana Islands (NWS states: GU, MP)
JTWC issues no cone and no coastal segments, so the area is the territories its track reaches. - Hazards
- Tornado, severe thunderstorm, flash flood, river flood, areal flood, coastal flood, tropical and other warnings, watches and advisories, and the forecasts for them
- Window
- In force now, with this warning’s forecast
- Made by
- JTWC’s own products, as this site’s pipeline published them, read again with each new warning. 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”.
Map
This map draws the contiguous United States, and Guam and Northern Mariana Islands are beyond it. What is in force there is listed under “In force in this area”.
What changed, last 60 minutes
Nothing has changed in the last 60 minutes.
The products’ own words and times, and what is no longer in force since the last read. Never written by AI.
All published products and source descriptions
Intensity forecast
The official intensity forecast, drawn by this site from JTWC’s Warning 12 (). Not an official JTWC product. Data: JTWC. JTWC’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 JTWC’s Warning 12 (). Not an official JTWC product. Data: JTWC. JTWC’s own.
SPC Day 1 outlook
- General Thunderstorms Risk
- Marginal Risk
SPC’s Day 1 categorical outlook, valid to , issued . SPC’s categories, as drawn. Data: NOAA/SPC.
Watches
No tornado or severe thunderstorm watch in force in this area.
SPC’s watches, by number, matched by the counties they list. Data: NOAA/SPC.
Mesoscale discussions
No mesoscale discussion reaches this area.
SPC’s mesoscale discussions whose outline reaches the area. Data: NOAA/SPC.
Storm ingredients
SPC’s hourly mesoanalysis, observed soundings and model guidance for the area, on the Analysis tab with its own clocks.
Drawn by the Analysis tab’s own renderer. Data: NOAA/SPC, NOAA/NCEP.
Flash-flood risk, Day 1
- Marginal
WPC’s excessive rainfall outlook, to , issued : a chance of flash flooding, in four categories. Data: NOAA/WPC.
River gauges in flood
No river, coastal or lake gauge in this area is in flood, observed or forecast.
NWS’s gauges at flood stage or above in the area, worst first, each with its forecast hydrograph on Rain & rivers. Data: NOAA/NWPS.
Rain expected and rain that fell
WPC’s rain forecast and MRMS’s radar estimate of the rain that fell, on the Briefing’s map for the area.
Data: NOAA/WPC, NOAA/NSSL MRMS.
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
JTWC warning, as published checked
NWS warnings and SPC watches checked
NWS watches and advisories checked
SPC mesoscale discussions checked
SPC Day 1 outlook checked
WPC excessive rainfall checked
NWPS river gauges checked
Radar live tiles, no last-good copy
No active alerts reported in this monitoring area.
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.