STORM MODEWeather tracking workspace

Tropical Depression Twentynine

30 kt · 35 mph · 1003 hPa · N at 9 kt

Storm Mode · JTWC Warning 1 · 14 Oct 12:00Z

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JTWC forecast for Tropical Depression Twentynine, Warning 1; rendered by MaverickWX

Published advisory track · Warning 1

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

Change time or forecast product

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.

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Analysis

Current cached context, independently dated. Regional reference: MP; 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

SPC’s skew-T diagram and hodograph of the sounding at Davenport, IA (DVN), 18Z. Its levels are in the table below. — Observed Sounding at Davenport, IA (DVN), for 18:00Z (2 h 55 min ago). SPC’s graphic; the values in its panels (CAPE, shear, the indices) are SPC’s computations from these levels. Data: NOAA/SPC.

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 (60)

Davenport, IA (DVN): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
Pressure	Height	Temperature	Dew point	Wind
1002 mb	229 m	19.0	7.0	130° 5 kt
1000 mb	244 m	18.6	4.6	160° 8 kt
977 mb	442 m	16.4	4.4	—
958 mb	610 m	14.8	3.8	145° 10 kt
925 mb	903 m	11.6	3.6	160° 8 kt
899 mb	1141 m	9.6	1.6	—
876 mb	1355 m	8.6	-2.4	—
861 mb	1498 m	8.4	-7.6	—
850 mb	1604 m	9.0	-14.0	195° 10 kt
839 mb	1712 m	9.4	-11.6	—
827 mb	1829 m	8.9	-11.3	210° 12 kt
797 mb	2134 m	7.9	-11.0	215° 14 kt
778 mb	2334 m	7.2	-10.8	—
740 mb	2743 m	4.9	-15.9	235° 12 kt
711 mb	3068 m	3.0	-20.0	—
700 mb	3194 m	2.2	-19.8	270° 15 kt
686 mb	3353 m	1.2	-19.4	270° 11 kt
661 mb	3658 m	-0.7	-18.8	265° 13 kt
650 mb	3788 m	-1.5	-18.5	—
636 mb	3962 m	-2.5	-19.0	265° 11 kt
623 mb	4125 m	-3.5	-19.5	—
612 mb	4267 m	-4.0	-22.9	260° 17 kt
600 mb	4421 m	-4.5	-26.5	—
589 mb	4572 m	-5.2	-27.2	265° 13 kt
574 mb	4769 m	-5.9	-28.9	—
544 mb	5182 m	-7.6	-32.3	255° 14 kt
524 mb	5479 m	-9.1	-29.1	—
510 mb	5688 m	-10.5	-29.5	—
500 mb	5840 m	-11.7	-29.7	265° 16 kt
483 mb	6096 m	-13.8	-30.9	260° 19 kt
469 mb	6325 m	-15.7	-32.7	—
446 mb	6706 m	-18.8	-34.4	280° 16 kt
428 mb	7010 m	-21.5	-34.0	270° 20 kt
410 mb	7315 m	-23.7	-36.7	280° 18 kt
400 mb	7500 m	-25.1	-38.1	280° 22 kt
385 mb	7776 m	-26.9	-39.9	—
373 mb	8004 m	-27.9	-41.9	—
361 mb	8230 m	-29.5	-39.8	270° 19 kt
346 mb	8534 m	-31.6	-36.9	270° 17 kt
332 mb	8839 m	-34.1	-37.0	265° 19 kt
320 mb	9086 m	-36.3	-38.8	—
310 mb	9305 m	-38.3	-41.3	—
300 mb	9530 m	-40.3	-43.1	255° 20 kt
286 mb	9855 m	-42.9	-45.7	—
273 mb	10168 m	-45.5	-48.3	—
259 mb	10518 m	-48.7	-51.6	—
250 mb	10750 m	-50.5	-53.7	245° 23 kt
240 mb	11014 m	-52.7	-55.7	—
230 mb	11287 m	-54.5	-57.4	245° 28 kt
220 mb	11582 m	-51.3	-55.6	275° 38 kt
210 mb	11887 m	-52.0	-57.3	275° 41 kt
200 mb	12190 m	-52.9	-58.9	280° 43 kt
182 mb	12802 m	-53.9	-63.3	280° 47 kt
168 mb	13309 m	-54.5	-64.5	—
158 mb	13716 m	-55.7	-67.4	280° 45 kt
150 mb	14030 m	-56.7	-69.7	285° 47 kt
136 mb	14630 m	-59.0	-73.5	280° 40 kt
124 mb	15240 m	-61.5	-77.4	290° 42 kt
112 mb	15850 m	-64.1	-80.8	280° 35 kt
100 mb	16540 m	-65.3	-83.3	305° 31 kt

Every station with a sounding (76)

SPC observed soundings checked 20:45Z · Data: NOAA/SPC

Storm details

JTWC Warning 1 · 14 Oct 12:00Z

Center position: 9.6°N, 161.2°E
Minimum pressure: 1003 hPa
Maximum sustained wind: 30 kt · 35 mph
Movement: N at 9 kt
Since comparison advisory: Comparison unavailable

Read official warning (JTWC) ↗

Forecast cycle 14 Oct 12:00Z. Center position belongs to the official state’s time, not imagery time.

Watched places

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Advisory comparison

Comparison unavailable: no different, earlier retained advisory was selected or published.

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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Impacts

Monitoring: GU, MP

Coastal alertsNot retained with this historical record Flooding rainOfficial rainfall context and coverage Storm surgeAvailability and coastal-only product limits Warnings in monitored area0 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 1: 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 20:55Z: a successful check, so this is none in force, not “can’t tell”.

Official forecast table

Forecast points

JTWC Warning 1 · advisory 14 Oct 12:00Z · forecast cycle 14 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
15 Oct 00:00Z +12 h from forecast cycle	10.5°N, 160.2°E	tropical depression	30 kt · 35 mph
15 Oct 12:00Z +24 h from forecast cycle	11.2°N, 158.2°E	tropical storm	35 kt · 40 mph
16 Oct 00:00Z +36 h from forecast cycle	11.6°N, 155.5°E	tropical storm	40 kt · 46 mph
16 Oct 12:00Z +48 h from forecast cycle	12.1°N, 152.7°E	tropical storm	50 kt · 58 mph
17 Oct 00:00Z +60 h from forecast cycle	12.6°N, 149.9°E	typhoon	65 kt · 75 mph
17 Oct 12:00Z +72 h from forecast cycle	13.2°N, 147.2°E	typhoon	80 kt · 92 mph
18 Oct 12:00Z +96 h from forecast cycle	14.4°N, 142.1°E	typhoon	110 kt · 127 mph
12:00Z +120 h from forecast cycle	16.1°N, 137.4°E	typhoon	125 kt · 144 mph

Advisory history and records

Advisory history

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 22 · 18:00Z	advisory	Snapshot 5a5d4ad2
JTWC Warning 21 · 12:00Z	advisory	Snapshot 34544bc3
JTWC Warning 20 · 06:00Z	advisory	Snapshot 7c7a42d9
JTWC Warning 19 · 00:00Z	advisory	Snapshot df4ad817
JTWC Warning 18 · 18 Oct 18:00Z	advisory	Snapshot fee9f0ca
JTWC Warning 17 · 18 Oct 12:00Z	advisory	Snapshot ded1ea58
JTWC Warning 16 · 18 Oct 06:00Z	advisory	Snapshot 610609f3
JTWC Warning 15 · 18 Oct 00:00Z	advisory	Snapshot 8da30f44
JTWC Warning 14 · 17 Oct 18:00Z	advisory	Snapshot 066b411c
JTWC Warning 13 · 17 Oct 12:00Z	advisory	Snapshot 7b6b7d88
JTWC Warning 12 · 17 Oct 06:00Z	advisory	Snapshot adcb8e93
JTWC Warning 11 · 17 Oct 00:00Z	advisory	Snapshot 0bf22ebc
JTWC Warning 10 · 16 Oct 18:00Z	advisory	Snapshot eea89e7f
JTWC Warning 8 · 16 Oct 06:00Z	advisory	Snapshot ff92eaa6
JTWC Warning 7 · 16 Oct 00:00Z	advisory	Snapshot 9d193cf4
JTWC Warning 6 · 15 Oct 18:00Z	advisory	Snapshot 4d09f045
JTWC Warning 5 · 15 Oct 12:00Z	advisory	Snapshot 7447d924
JTWC Warning 4 · 15 Oct 06:00Z	advisory	Snapshot 2d609133
JTWC Warning 3 · 15 Oct 00:00Z	advisory	Snapshot d96ff9c8
JTWC Warning 2 · 14 Oct 18:00Z	advisory	Snapshot d99cea2d
JTWC Warning 1 · 14 Oct 12:00Z	first	Snapshot 99aef0d4 · Selected

Monitoring geography and current changes

Area: U.S. territories JTWC’s forecast track passes within 300 nm of, Warning 1: 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

19:58ZSPC Day 1 outlook issued

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 1 (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 1 (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.

Open the storm’s page

Imagery from NASA GIBS: NOAA GOES and JMA Himawari.

Model guidance

The models’ tracks, which are not a forecast for Tropical Depression Twentynine, JTWC Warning 1

The models’ tracks, which are not a forecast, drawn by this site from JTWC’s Warning 1 (12:00Z). 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 20:00Z to 20 Oct 12:00Z, issued 19:58Z. 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.

Open the Analysis tab

Drawn by the Analysis tab’s own renderer. Data: NOAA/SPC, NOAA/NCEP.

Flash-flood risk, Day 1

Marginal

WPC’s excessive rainfall outlook, 16:00Z to 20 Oct 12:00Z, issued 15:55Z: 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.

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 20:53Z
NWS warnings and SPC watches checked 20:55Z
NWS watches and advisories checked 20:55Z
SPC mesoscale discussions checked 20:55Z
SPC Day 1 outlook checked 20:50Z
WPC excessive rainfall checked 20:50Z
NWPS river gauges checked 20:45Z
Radar live tiles, no last-good copy

Area alertsTropical Depression Twentynine · 0 alerts

No active alerts reported in this monitoring area.

Checked 20:55Z

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.