Tropical Depression Surigae

30 kt · 35 mph · NE at 7 kt

Storm Mode · JTWC Warning 30 · 30 Sep 12:00Z

Final advisory · monitoring can continue

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JTWC forecast for Tropical Depression Surigae, Warning 30; rendered by MaverickWX

Published advisory track · Warning 30

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MaverickWX map · Data: JTWC · not an official graphic

Change time or forecast product

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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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Analysis and model context

Current cached context, independently dated. Regional products keep their published footprint; they are not clipped or attributed to one storm. 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 Sterling, VA (IAD), 12Z. Its levels are in the table below. — Observed Sounding at Sterling, VA (IAD), for 12:00Z (8 h 57 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 (52)

Sterling, VA (IAD): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
Pressure	Height	Temperature	Dew point	Wind
1024 mb	93 m	5.8	-1.2	355° 7 kt
1011 mb	194 m	6.4	-4.6	—
1000 mb	280 m	6.4	-5.6	020° 20 kt
969 mb	538 m	6.1	-6.9	020° 24 kt
959 mb	623 m	5.8	-7.2	—
941 mb	778 m	5.6	-11.4	025° 18 kt
925 mb	918 m	5.0	-15.0	045° 16 kt
890 mb	1232 m	3.8	-26.2	—
867 mb	1444 m	3.0	-20.0	—
850 mb	1604 m	2.6	-25.4	040° 24 kt
835 mb	1748 m	2.6	-22.4	—
819 mb	1904 m	2.8	-28.2	—
807 mb	2023 m	3.0	-33.0	—
795 mb	2145 m	3.2	-9.8	—
781 mb	2289 m	4.0	-6.0	—
756 mb	2552 m	2.1	-6.3	030° 23 kt
734 mb	2790 m	0.4	-6.6	—
722 mb	2923 m	0.0	-7.0	—
705 mb	3114 m	1.2	-11.8	—
700 mb	3171 m	1.0	-13.0	015° 29 kt
685 mb	3345 m	0.0	-12.0	015° 31 kt
674 mb	3475 m	0.6	-16.4	—
658 mb	3669 m	1.6	-23.4	—
648 mb	3792 m	1.6	-26.4	—
602 mb	4373 m	-3.2	-30.0	030° 22 kt
568 mb	4832 m	-7.0	-32.9	040° 24 kt
538 mb	5260 m	-10.5	-35.5	—
516 mb	5580 m	-13.1	-32.8	025° 33 kt
504 mb	5759 m	-14.3	-35.3	—
500 mb	5820 m	-13.5	-40.5	035° 33 kt
488 mb	6004 m	-13.5	-46.5	—
400 mb	7470 m	-26.3	-47.3	020° 39 kt
372 mb	7987 m	-30.8	-49.0	020° 45 kt
352 mb	8380 m	-34.3	-50.3	—
324 mb	8955 m	-38.5	-58.5	—
300 mb	9480 m	-42.3	-59.3	020° 40 kt
282 mb	9895 m	-45.1	-61.9	020° 43 kt
272 mb	10136 m	-46.7	-64.7	—
250 mb	10690 m	-51.3	-66.3	010° 35 kt
229 mb	11256 m	-55.1	-70.1	—
219 mb	11542 m	-56.1	-70.1	000° 39 kt
207 mb	11901 m	-55.7	-71.7	—
200 mb	12120 m	-57.1	-73.1	015° 21 kt
189 mb	12479 m	-55.6	-76.0	345° 18 kt
176 mb	12931 m	-53.7	-79.7	—
164 mb	13381 m	-54.4	-80.8	295° 40 kt
150 mb	13950 m	-55.3	-82.3	300° 35 kt
138 mb	14481 m	-56.1	-83.2	300° 27 kt
127 mb	15008 m	-57.7	-85.7	—
116 mb	15571 m	-62.0	-86.2	265° 14 kt
101 mb	16420 m	-66.7	-86.7	—
100 mb	16480 m	-66.7	-86.7	270° 32 kt

Every station with a sounding (76)

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

Storm details

JTWC Warning 30 · 30 Sep 12:00Z

Center position: 31.8°N, 138.8°E
Minimum pressure: Not reported
Maximum sustained wind: 30 kt · 35 mph
Movement: NE at 7 kt
Change from comparison: Wind -5 kt · pressure Not comparable
Compared with Warning 29 · 30 Sep 06:00Z

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Forecast cycle 30 Sep 12:00Z. Center position belongs to the official state’s time, not imagery time. The warning center issued its final advisory; continuing flood/rain monitoring does not imply a new cyclone forecast.

Watched places

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Advisory comparison

Show previous forecast as a dashed line

Solid: Warning 30 · 30 Sep 12:00Z
Dashed: Warning 29 · 30 Sep 06:00Z

Compare positions and intensity

Solid: JTWC Warning 30 · 30 Sep 12:00Z
Dashed: JTWC Warning 29 · 30 Sep 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	35 kt · 40 mph	-5 kt
Minimum pressure	Not reported	Not reported	Not comparable
Center position	31.8°N, 138.8°E	31.2°N, 138.3°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.

No supported U.S. NWS monitoring area for this advisory. This does not mean no warnings worldwide.

Lightning activity — GOES GLM

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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

No supported U.S. monitoring area

Coastal alertsLocal national warning authorities apply Flooding rainOfficial rainfall context and coverage Storm surgeAvailability and coastal-only product limits Nearby severe warningsNWS coverage unavailable here; not a global all-clear

Current warnings in the monitoring area

None: JTWC’s forecast track passes within 300 nm of no U.S. territory with NWS zones, Warning 30. Current geographical context; these alerts are not attributed to the cyclone.

No U.S. area

No U.S. territory is in this storm’s area: JTWC’s track passes within 300 nm of none. Its own panels are shown, and no NWS alert is listed.

Official forecast table

Official forecast positions and intensity

JTWC Warning 30 · advisory 30 Sep 12:00Z · forecast cycle 30 Sep 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
1 Oct 00:00Z +12 h from forecast cycle	33.7°N, 141.1°E	tropical depression	30 kt · 35 mph
1 Oct 12:00Z +24 h from forecast cycle	36.5°N, 145.2°E	tropical depression	30 kt · 35 mph

Advisory history and records

Retained advisory records

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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 30 · 30 Sep 12:00Z	advisory	Snapshot fe417aba · Selected
JTWC Warning 29 · 30 Sep 06:00Z	advisory	Snapshot c42914ce
JTWC Warning 28 · 30 Sep 00:00Z	advisory	Snapshot 9ee9be54

Monitoring geography and current changes

Area: None: JTWC’s forecast track passes within 300 nm of no U.S. territory with NWS zones, Warning 30
JTWC issues no cone and no coastal segments, so the area is the territories its track reaches.
Hazards: —
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”.

All published products and source descriptions

Forecast track

The official forecast track, drawn by this site from JTWC’s Warning 30 (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 30 (12:00Z). 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.

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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 Surigae, JTWC Warning 30

The models’ tracks, which are not a forecast, drawn by this site from JTWC’s Warning 30 (12:00Z). Not an official JTWC product. Data: JTWC. JTWC’s own.

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 20:56Z
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.