Forecast track
The official forecast track, drawn by this site from JTWC’s Warning 16 (). Not an official JTWC product. Data: JTWC. JTWC’s own.
Super Typhoon Champi
Current advisory context · 130 kt · 150 mph · 931 hPa · W at 12 kt
Storm Mode · JTWC Warning 16 ·
Latest published advisory
Published advisory track · Warning 16
Observed imagery loads separately from the advisory. The base map is not observed satellite imagery.
JTWC supplies no cone for this issuance; none is invented.
MaverickWX map · Data: JTWC · not an official graphic
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)Use Forecast above to pin an official issuance and valid point. The forecast table and advisory history remain available below.
Analysis and model context
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.
Soundings: what weather balloons measured
A balloon launched about an hour before the time named, measuring as it rose and drifted with the wind: the atmosphere above one place, at one time. Model soundings, which are forecasts, are not shown here.
The levels this sounding was drawn from (61)
| Pressure | Height | Temperature | Dew point | Wind |
|---|---|---|---|---|
| 1015 mb | 61 m | 18.6 | 10.6 | 005° 6 kt |
| 1000 mb | 191 m | 16.4 | 9.4 | 030° 8 kt |
| 987 mb | 305 m | 15.3 | 9.2 | 040° 8 kt |
| 951 mb | 610 m | 12.3 | 8.6 | 035° 10 kt |
| 925 mb | 847 m | 10.0 | 8.2 | 035° 11 kt |
| 888 mb | 1186 m | 8.0 | 4.2 | — |
| 864 mb | 1412 m | 6.2 | 4.1 | — |
| 852 mb | 1524 m | 5.9 | 2.3 | 350° 10 kt |
| 850 mb | 1546 m | 5.8 | 1.9 | 340° 9 kt |
| 821 mb | 1829 m | 3.9 | 0.9 | 350° 5 kt |
| 800 mb | 2040 m | 2.0 | 0.8 | — |
| 780 mb | 2244 m | 0.6 | -0.6 | — |
| 769 mb | 2358 m | 0.4 | -3.2 | — |
| 749 mb | 2570 m | 3.2 | -31.8 | — |
| 733 mb | 2743 m | 4.4 | -41.2 | 245° 24 kt |
| 706 mb | 3048 m | 4.2 | -39.3 | 235° 36 kt |
| 700 mb | 3119 m | 4.0 | -38.0 | 235° 37 kt |
| 655 mb | 3658 m | 0.5 | -34.1 | 245° 34 kt |
| 633 mb | 3927 m | -1.5 | -32.5 | — |
| 606 mb | 4267 m | -3.9 | -24.9 | 255° 35 kt |
| 596 mb | 4403 m | -4.9 | -21.9 | — |
| 583 mb | 4572 m | -6.2 | -23.2 | 240° 36 kt |
| 561 mb | 4877 m | -8.1 | -24.6 | 255° 36 kt |
| 531 mb | 5300 m | -10.1 | -25.1 | — |
| 512 mb | 5579 m | -12.3 | -25.3 | — |
| 500 mb | 5760 m | -12.9 | -25.9 | 250° 44 kt |
| 481 mb | 6055 m | -14.3 | -28.3 | — |
| 465 mb | 6312 m | -15.9 | -34.9 | — |
| 454 mb | 6492 m | -17.1 | -35.1 | — |
| 441 mb | 6710 m | -18.7 | -30.7 | — |
| 414 mb | 7178 m | -22.9 | -35.9 | — |
| 400 mb | 7430 m | -25.3 | -34.3 | 250° 50 kt |
| 390 mb | 7620 m | -26.8 | -36.2 | 255° 51 kt |
| 377 mb | 7856 m | -28.9 | -40.9 | — |
| 365 mb | 8087 m | -29.7 | -47.7 | — |
| 340 mb | 8588 m | -33.7 | -51.7 | — |
| 322 mb | 8966 m | -37.3 | -52.3 | — |
| 308 mb | 9271 m | -40.1 | -54.1 | — |
| 300 mb | 9450 m | -41.7 | -53.7 | 240° 57 kt |
| 287 mb | 9749 m | -44.3 | -58.3 | — |
| 267 mb | 10230 m | -48.5 | -56.5 | — |
| 250 mb | 10660 m | -52.3 | -57.3 | 250° 58 kt |
| 238 mb | 10975 m | -54.9 | -61.9 | — |
| 227 mb | 11275 m | -57.1 | -63.1 | — |
| 213 mb | 11675 m | -59.1 | -66.1 | — |
| 201 mb | 12039 m | -57.5 | -75.5 | — |
| 200 mb | 12070 m | -57.5 | -75.5 | 255° 65 kt |
| 181 mb | 12700 m | -57.1 | -78.1 | — |
| 150 mb | 13890 m | -58.1 | -82.1 | 255° 58 kt |
| 137 mb | 14460 m | -56.3 | -82.3 | — |
| 121 mb | 15240 m | -59.7 | -83.3 | 265° 49 kt |
| 104 mb | 16154 m | -62.9 | -84.9 | 265° 60 kt |
| 100 mb | 16420 m | -62.5 | -85.5 | 265° 48 kt |
| 88 mb | 17207 m | -64.2 | -86.3 | 255° 50 kt |
| 76 mb | 18110 m | -60.3 | -86.7 | 280° 28 kt |
| 63 mb | 19270 m | -62.6 | -88.4 | 255° 33 kt |
| 43 mb | 21654 m | -59.8 | -87.7 | 285° 18 kt |
| 33 mb | 23313 m | -59.0 | -87.3 | 250° 26 kt |
| 23 mb | 25607 m | -54.9 | -85.0 | 120° 1 kt |
| 13 mb | 29300 m | -48.1 | -82.9 | 190° 10 kt |
| 6 mb | 33975 m | -40.9 | -79.9 | — |
Every station with a sounding (76)
- Aberdeen, SD (ABR)
- ADN
- Albany, NY (ALB)
- Albuquerque, NM (ABQ)
- Amarillo, TX (AMA)
- Birmingham, AL (BMX)
- Bismarck, ND (BIS)
- Blacksburg, VA (RNK)
- Boise, ID (BOI)
- Brownsville, TX (BRO)
- Buffalo, NY (BUF)
- Cape Canaveral, FL (XMR)
- Caribou, ME (CAR)
- Chanhassen, MN (MPX)
- Charleston, SC (CHS)
- Chihuahua, Mexico (76225)
- Corpus Christi, TX (CRP)
- Davenport, IA (DVN)
- Del Rio, TX (DRT)
- Dodge City, KS (DDC)
- Elko, NV (LKN)
- Flagstaff, AZ (FGZ)
- Fort Worth, TX (FWD)
- Gaylord, MI (APX)
- Glasgow, MT (GGW)
- Grand Junction, CO (GJT)
- Gray, ME (GYX)
- GRB
- Great Falls, MT (TFX)
- Greensboro, NC (GSO)
- International Falls, MN (INL)
- Jackson, MS (JAN)
- Jacksonville, FL (JAX)
- Key West, FL (KEY)
- La Paz, Mexico (76405)
- Lake Charles, LA (LCH)
- Lamont, OK (LMN)
- Las Vegas, NV (VEF)
- Lincoln, IL (ILX)
- Little Rock, AR (LZK)
- Maniwaki, Quebec (WMW)
- Mazatlán, Mexico (76458)
- Medford, OR (MFR)
- Miami, FL (MFL)
- Midland, TX (MAF)
- Nashville, TN (BNA)
- Newport, NC (MHX)
- Norman, OK (OUN)
- North Platte, NE (LBF)
- Oakland, CA (OAK)
- OYU
- Peachtree City, GA (FFC)
- Pickle Lake, Ontario (WPL)
- Pittsburgh, PA (PIT)
- Quillayute, WA (UIL)
- Rapid City, SD (UNR)
- Reno, NV (REV)
- Riverton, WY (RIW)
- Salem, OR (SLE)
- Salt Lake City, UT (SLC)
- San Diego, CA (NKX)
- Santa Teresa, NM (EPZ)
- Shreveport, LA (SHV)
- Slidell, LA (LIX)
- Spokane, WA (OTX)
- Springfield, MO (SGF)
- Sterling, VA (IAD)
- Tampa Bay, FL (TBW)
- Topeka, KS (TOP)
- Upton, NY (OKX)
- Valley, NE (OAX)
- Vandenberg, CA (VBG)
- White Lake, MI (DTX)
- Wilmington, OH (ILN)
- Yarmouth, Nova Scotia (YQI)
- Zacatecas, Mexico (76526)
SPC observed soundings checked · Data: NOAA/SPC
Potential impacts and monitoring context
Current NWS monitoring states: GU, MPCurrent warnings in the monitoring area
U.S. territories JTWC’s forecast track passes within 300 nm of, Warning 16: Guam and Northern Mariana Islands. Current geographical context; these alerts are not attributed to the cyclone.
In force in this area 4
- Typhoon Warning1until 16:45Z
- Coastal Flood Warning1until 18:00Z
- High Surf Warning1until 18:00Z
- Flood Watch1until 18:00Z
Every alert in this area, most urgent first
- Typhoon WarningGuam; Rota; Guam Coastal Waters; Rota Coastal Watersuntil · NWS Tiyan GU
- Coastal Flood WarningGuam; Rotauntil · NWS Tiyan GU
- High Surf WarningGuam; Rotauntil · NWS Tiyan GU
- Flood WatchGuam; Rotauntil · NWS Tiyan GU
Most urgent first, by the Briefing’s ranking. Checked .
Typhoon Warning
Guam; Rota; Guam Coastal Waters; Rota Coastal Waters
Typhoon Warning issued October 18 at 3:01PM ChST by NWS Tiyan GU
Issued · ends
Official Typhoon Warning bulletinCoastal Flood Warning
Guam; Rota
Coastal Flood Warning issued October 18 at 12:00PM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Issued · ends
Official Coastal Flood Warning bulletinHigh Surf Warning
Guam; Rota
High Surf Warning issued October 18 at 12:00PM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Issued · ends
Official High Surf Warning bulletinFlood Watch
Guam; Rota
Flood Watch issued October 18 at 3:59PM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Issued · ends
Official Flood Watch bulletin
Official forecast table
Official forecast positions and intensity
JTWC Warning 16 · 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 | 13.8°N, 140.2°E | typhoon | 120 kt · 138 mph |
+24 h from forecast cycle | 14.7°N, 138.3°E | typhoon | 125 kt · 144 mph |
+36 h from forecast cycle | 15.7°N, 136.2°E | super typhoon | 135 kt · 155 mph |
+48 h from forecast cycle | 16.7°N, 133.9°E | super typhoon | 140 kt · 161 mph |
+60 h from forecast cycle | 17.8°N, 131.4°E | super typhoon | 135 kt · 155 mph |
+72 h from forecast cycle | 18.9°N, 129.2°E | super typhoon | 130 kt · 150 mph |
+96 h from forecast cycle | 20.4°N, 126.3°E | typhoon | 115 kt · 132 mph |
+120 h from forecast cycle | 22.2°N, 123.5°E | typhoon | 95 kt · 109 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.
| Official issuance | Revision kind | Record |
|---|---|---|
| JTWC Warning 16 · | advisory | Snapshot 610609f3 · Selected |
| JTWC Warning 15 · | advisory | Snapshot 8da30f44 |
| JTWC Warning 14 · | advisory | Snapshot 066b411c |
| JTWC Warning 13 · | advisory | Snapshot 7b6b7d88 |
| JTWC Warning 12 · | advisory | Snapshot adcb8e93 |
| 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 16: 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
since , when this server began watching this areaNothing has changed since 07:33Z.
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 16 (). Not an official JTWC product. Data: JTWC. JTWC’s own.
Satellite
The storm’s page shows it on NASA GIBS (NOAA GOES, JMA Himawari)’s imagery, loaded by your browser. Himawari at 2° from the storm's meridian.
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 16 (). Not an official JTWC product. Data: JTWC. JTWC’s own.
Flash-flood risk, Day 1
- Marginal
- Slight
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.
SPC Day 1 outlook
- General Thunderstorms 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.
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
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.