Tropical Depression Twentyeight

30 kt · 35 mph · 1006 hPa · WNW at 7 kt

Storm Mode · JTWC Warning 3 · 12 Oct 12:00Z

Historical advisory selected · current imagery and impacts are not attached

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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.

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JTWC forecast for Tropical Depression Twentyeight, Warning 3; rendered by MaverickWX

Published advisory track · Warning 3

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

Use Forecast above to pin an official issuance and valid point. The forecast table and advisory history remain available below.

Retained advisory records

Return to latest advisory

Each 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.

Advisory history; retained records only
Official issuance	Revision kind	Record
JTWC Warning 14 · 15 Oct 06:00Z	advisory	Snapshot 8fbaff27
JTWC Warning 13 · 15 Oct 00:00Z	advisory	Snapshot 8bc4bc36
JTWC Warning 12 · 14 Oct 18:00Z	advisory	Snapshot 7e0e390d
JTWC Warning 11 · 14 Oct 12:00Z	advisory	Snapshot 8d763f0f
JTWC Warning 10 · 14 Oct 06:00Z	advisory	Snapshot 812bebeb
JTWC Warning 9 · 14 Oct 00:00Z	advisory	Snapshot 2fc40378
JTWC Warning 8 · 13 Oct 18:00Z	advisory	Snapshot 3fbf2ba2
JTWC Warning 7 · 13 Oct 12:00Z	advisory	Snapshot aed3035f
JTWC Warning 6 · 13 Oct 06:00Z	advisory	Snapshot b840cd4c
JTWC Warning 5 · 13 Oct 00:00Z	advisory	Snapshot 585810cb
JTWC Warning 4 · 12 Oct 18:00Z	advisory	Snapshot 44050660
JTWC Warning 3 · 12 Oct 12:00Z	advisory	Snapshot 50154ebe · Selected
JTWC Warning 2 · 12 Oct 06:00Z	advisory	Snapshot 1e7d1801
JTWC Warning 1 · 12 Oct 00:00Z	first	Snapshot 99b89f8e

Advisory comparison details

Solid: JTWC Warning 3 · 12 Oct 12:00Z
Dashed: JTWC Warning 2 · 12 Oct 06:00Z. Comparison uses each record’s own geometry. A revision is not a landfall or impact prediction.

Current-state revision (two separate official issuances)
Field	Selected issuance	Comparison issuance	Change
Maximum sustained wind	30 kt · 35 mph	25 kt · 29 mph	+5 kt
Minimum pressure	1006 hPa	1006 hPa	0 hPa
Center position	17.1°N, 149.1°E	16.8°N, 149.8°E	Different observation times; not a forecast shift

Forecast comparison unavailable: these records have no matching forecast valid times. No interpolation or six-hour step is assumed.

Storm details

JTWC Warning 3 · 12 Oct 12:00Z

Center position: 17.1°N, 149.1°E
Minimum pressure: 1006 hPa
Maximum sustained wind: 30 kt · 35 mph
Movement: WNW at 7 kt
Change from comparison: Wind +5 kt · pressure 0 hPa
Compared with Warning 2 · 12 Oct 06:00Z

Read official warning (JTWC) ↗

Forecast cycle 12 Oct 12:00Z. Center position belongs to the official state’s time, not imagery time.

Watched places

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Advisory comparison

Show previous forecast as a dashed line

Solid: Warning 3 · 12 Oct 12:00Z
Dashed: Warning 2 · 12 Oct 06:00Z

Compare positions and intensity

Solid: JTWC Warning 3 · 12 Oct 12:00Z
Dashed: JTWC Warning 2 · 12 Oct 06:00Z. Comparison uses each record’s own geometry. A revision is not a landfall or impact prediction.

Current-state revision (two separate official issuances)
Field	Selected issuance	Comparison issuance	Change
Maximum sustained wind	30 kt · 35 mph	25 kt · 29 mph	+5 kt
Minimum pressure	1006 hPa	1006 hPa	0 hPa
Center position	17.1°N, 149.1°E	16.8°N, 149.8°E	Different observation times; not a forecast shift

Forecast comparison unavailable: these records have no matching forecast valid times. No interpolation or six-hour step is assumed.

Data coverage

JTWC has no NHC cone, NHC wind probabilities or NHC civil coastal warnings. Local national services remain the warning authorities.

Geographic context: Natural Earth boundaries and representative place labels. Radar coverage is limited offshore. Satellite pixels keep their source palette and actual observation time. Missing imagery is not clear weather.

Lightning activity — GOES GLM

Total lightning, including in-cloud activity. Not ground-strike locations or a safe-to-go-outside signal.

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Cached lightning source details and text readings

Map layers, imagery opacity and source clocks

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Potential impacts and monitoring context

Current NWS monitoring states: MP

Coastal alertsNot retained with this historical record Flooding rainOfficial rainfall context and coverage Storm surgeAvailability and coastal-only product limits Nearby severe warnings0 severe/flash-flood warnings in the named monitoring area · source current

Current warnings in the monitoring area

U.S. territories JTWC’s forecast track passes within 300 nm of, Warning 3: 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 6

Typhoon Warning1until 18 Oct 02:45Z
Tropical Storm Warning1until 18 Oct 02:45Z
Coastal Flood Warning1until 18 Oct 18:00Z
High Surf Warning1until 18 Oct 18:00Z
Typhoon Watch1until 18 Oct 02:45Z
Flood Watch1until 18 Oct 08:00Z

Every alert in this area, most urgent first

Typhoon WarningGuam; Rota; Guam Coastal Waters; Rota Coastal Watersuntil 18 Oct 02:45Z · NWS Tiyan GU
Tropical Storm WarningTinian; Saipan; Tinian Coastal Waters; Saipan Coastal Watersuntil 18 Oct 02:45Z · NWS Tiyan GU
Coastal Flood WarningGuam; Rota; Tinian; Saipanuntil 18 Oct 18:00Z · NWS Tiyan GU
High Surf WarningGuam; Rota; Tinian; Saipanuntil 18 Oct 18:00Z · NWS Tiyan GU
Typhoon WatchTinian; Saipanuntil 18 Oct 02:45Z · NWS Tiyan GU
Flood WatchGuam; Rotauntil 18 Oct 08:00Z · NWS Tiyan GU

Most urgent first, by the Briefing’s ranking. Checked 19:42Z.

Typhoon Warning
Guam; Rota; Guam Coastal Waters; Rota Coastal Waters
Typhoon Warning issued October 18 at 4:40AM ChST by NWS Tiyan GU
Issued 01:12Z · ends 18 Oct 02:45Z
Official Typhoon Warning bulletin
Tropical Storm Warning
Tinian; Saipan; Tinian Coastal Waters; Saipan Coastal Waters
Tropical Storm Warning issued October 18 at 4:40AM ChST by NWS Tiyan GU
Issued 01:12Z · ends 18 Oct 02:45Z
Official Tropical Storm Warning bulletin
Coastal Flood Warning
Guam; Rota; Tinian; Saipan
Coastal Flood Warning issued October 17 at 4:31PM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Issued 16 Oct 21:26Z · ends 18 Oct 18:00Z
Official Coastal Flood Warning bulletin
High Surf Warning
Guam; Rota; Tinian; Saipan
High Surf Warning issued October 17 at 4:31PM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU
Issued 16 Oct 21:26Z · ends 18 Oct 18:00Z
Official High Surf Warning bulletin
Typhoon Watch
Tinian; Saipan
Typhoon Watch issued October 18 at 4:40AM ChST by NWS Tiyan GU
Issued 18:40Z · ends 18 Oct 02:45Z
Official Typhoon Watch bulletin
Flood Watch
Guam; Rota
Flood Watch issued October 18 at 4:12AM ChST until October 18 at 6:00PM ChST by NWS Tiyan GU
Issued 18:12Z · ends 18 Oct 08:00Z
Official Flood Watch bulletin

Official forecast table

Official forecast positions and intensity

JTWC Warning 3 · advisory 12 Oct 12:00Z · forecast cycle 12 Oct 12:00Z. Forecast positions are future estimates, not observed imagery. Classification is shown only where published.

Published official forecast; no interpolated positions or winds
Valid time / lead	Position	Classification	Sustained wind
13 Oct 00:00Z +12 h from forecast cycle	18.1°N, 147.4°E	tropical depression	30 kt · 35 mph
13 Oct 12:00Z +24 h from forecast cycle	19.2°N, 145.7°E	tropical depression	25 kt · 29 mph
14 Oct 00:00Z +36 h from forecast cycle	20.3°N, 143.8°E	tropical depression	25 kt · 29 mph
14 Oct 12:00Z +48 h from forecast cycle	21.3°N, 142.0°E	tropical depression	20 kt · 23 mph

Monitoring geography and current changes

Area: U.S. territories JTWC’s forecast track passes within 300 nm of, Warning 3: Northern Mariana Islands (NWS states: 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 Northern Mariana Islands is beyond it. What is in force there is listed under “In force in this area”.

What changed, last 60 minutes

since 19:28Z, when this server began watching this area

Nothing has changed since 19:28Z.

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

Forecast track

The official forecast track, drawn by this site from JTWC’s Warning 3 (12:00Z). Not an official JTWC product. Data: JTWC. JTWC’s own.

Intensity forecast

The official intensity forecast, drawn by this site from JTWC’s Warning 3 (12:00Z). Not an official JTWC product. Data: JTWC. JTWC’s own.

Satellite

The storm’s page shows it on the satellite, loaded by your browser.

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Imagery from NASA GIBS: NOAA GOES and JMA Himawari.

Model guidance

The models’ tracks, which are not a forecast for Tropical Depression Twentyeight, JTWC Warning 3

The models’ tracks, which are not a forecast, drawn by this site from JTWC’s Warning 3 (12:00Z). Not an official JTWC product. Data: JTWC. JTWC’s own.

Flash-flood risk, Day 1

Marginal
Slight

WPC’s excessive rainfall outlook, 16:00Z to 18 Oct 12:00Z, issued 15:39Z: 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.

Open Rain & rivers

Data: NOAA/WPC, NOAA/NSSL MRMS.

SPC Day 1 outlook

General Thunderstorms Risk

SPC’s Day 1 categorical outlook, valid 16:30Z to 18 Oct 12:00Z, issued 16:14Z. 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.

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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.

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Live tiles; the radar keeps no last-good copy.

Sources

JTWC warning, as published checked 19:41Z
NWS warnings and SPC watches checked 19:42Z
NWS watches and advisories checked 19:42Z
SPC mesoscale discussions checked 19:42Z
SPC Day 1 outlook checked 19:40Z
WPC excessive rainfall checked 19:40Z
NWPS river gauges checked 19:35Z
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.