STORM MODEWeather tracking workspace

Tropical Depression Thirtyone

Tropical Depression 35 mph (30 kt) · 1005 hPa · WNW at 20 mph (17 kt)

JTWC Warning 3 ·

Historical advisory selected · current imagery and impacts are not attached

JTWC forecast for Tropical Depression Thirtyone, 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.

ⓘ About this map

JTWC does not publish an NHC cone.

Basemap

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.

No observed replay frame displayed.

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Choose Forecast for a pinned issuance and valid time.

Analysis

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Analysis

Area, source times and interpretation

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 Rapid City, SD (UNR), 00Z. Its levels are in the table below.
Observed Sounding at Rapid City, SD (UNR), for (10 h 5 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 (61)
Rapid City, SD (UNR): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
903 mb1029 m13.4-2.6085° 3 kt
885 mb1197 m11.9-2.4090° 6 kt
872 mb1321 m10.9-2.3105° 8 kt
860 mb1436 m9.8-2.1105° 5 kt
850 mb1534 m9.0-2.0115° 4 kt
793 mb2104 m5.3-3.9195° 13 kt
774 mb2303 m6.2-1.0230° 14 kt
762 mb2430 m5.7-1.9235° 14 kt
752 mb2538 m5.0-2.8225° 14 kt
732 mb2758 m3.2-3.8—
720 mb2891 m2.8-5.2—
700 mb3119 m2.2-10.8295° 16 kt
687 mb3270 m1.2-13.0305° 14 kt
657 mb3628 m-1.3-18.3—
644 mb3787 m-2.3-18.3—
611 mb4204 m-4.0-10.9285° 32 kt
596 mb4400 m-4.7-13.3280° 35 kt
579 mb4628 m-5.9-16.4285° 33 kt
554 mb4972 m-8.5-18.3285° 38 kt
542 mb5142 m-9.9-18.9—
532 mb5286 m-10.8-19.3285° 43 kt
510 mb5609 m-13.5-21.5285° 50 kt
500 mb5760 m-14.7-22.7280° 48 kt
489 mb5927 m-15.9-25.1285° 49 kt
461 mb6369 m-18.7-31.7—
436 mb6781 m-21.6-34.6280° 51 kt
423 mb7003 m-23.2-35.6280° 59 kt
410 mb7231 m-24.8-36.3280° 62 kt
400 mb7410 m-26.1-37.1280° 62 kt
379 mb7797 m-29.1-40.1—
359 mb8178 m-32.2-42.0275° 63 kt
337 mb8618 m-35.7-43.4275° 63 kt
327 mb8827 m-37.4-44.1270° 65 kt
316 mb9065 m-39.4-44.8275° 68 kt
305 mb9308 m-41.1-47.1—
300 mb9420 m-41.9-46.9280° 70 kt
280 mb9884 m-45.3-50.3280° 76 kt
269 mb10150 m-47.5-52.5—
259 mb10399 m-49.3-54.3—
250 mb10630 m-51.3-56.2275° 77 kt
237 mb10973 m-53.9-58.9275° 76 kt
221 mb11417 m-56.7-61.7275° 77 kt
206 mb11856 m-59.9-64.6275° 77 kt
200 mb12040 m-61.3-65.8275° 78 kt
187 mb12453 m-64.1-68.6275° 76 kt
176 mb12823 m-65.7-70.3—
156 mb13552 m-65.8-71.7270° 69 kt
150 mb13790 m-64.7-71.7275° 68 kt
140 mb14213 m-63.4-71.4280° 57 kt
127 mb14810 m-63.8-73.4265° 51 kt
117 mb15308 m-65.7-76.7275° 60 kt
107 mb15851 m-67.7-80.3270° 41 kt
100 mb16260 m-66.9-80.9280° 48 kt
90 mb16897 m-67.2-82.7280° 47 kt
77 mb17848 m-65.0-84.0240° 22 kt
67 mb18699 m-62.2-84.2285° 31 kt
46 mb21002 m-63.5-91.1235° 18 kt
36 mb22518 m-61.7-90.5305° 20 kt
26 mb24529 m-62.9-90.9305° 13 kt
16 mb27520 m-61.2-90.2265° 27 kt
7 mb32730 m-54.1-84.1265° 72 kt
Every station with a sounding (76)

SPC observed soundings checked · Data: NOAA/SPC

Impacts

Monitoring: MP
Official forecast table

Forecast points

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

Published official forecast; no interpolated positions or winds
Valid time / leadPositionClassificationSustained wind

+12 h from forecast cycle
19.7°N, 142.9°ETropical storm46 mph (40 kt)

+24 h from forecast cycle
20.8°N, 140.2°ETropical storm58 mph (50 kt)

+36 h from forecast cycle
21.8°N, 137.5°ETyphoon75 mph (65 kt)

+48 h from forecast cycle
22.7°N, 135.6°ETyphoon92 mph (80 kt)

+60 h from forecast cycle
23.7°N, 135.1°ETyphoon109 mph (95 kt)

+72 h from forecast cycle
24.5°N, 136.2°ETyphoon104 mph (90 kt)

+96 h from forecast cycle
26.6°N, 142.1°ETyphoon86 mph (75 kt)

+120 h from forecast cycle
29.8°N, 150.5°ETropical storm63 mph (55 kt)
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.

Monitoring geography
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”.

All published products and source descriptions

Forecast track

The official forecast track for Tropical Depression Thirtyone, JTWC Warning 3

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

Intensity forecast

The official intensity forecast for Tropical Depression Thirtyone, JTWC Warning 3

The official intensity forecast, drawn by this site from JTWC’s Warning 3 (). 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 Thirtyone, JTWC Warning 3

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

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.

Open the Analysis tab

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

Flash-flood risk, Day 1

    WPC’s Day 1 excessive rainfall outlook. 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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    Drawn live: if the radar fails, nothing older is shown in its place.

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    0AlertsTropical Depression Thirtyone
    No alerts in its area ·
    · alerts checked 10:04Z