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Subtropical Storm Josephine

55 kt · 63 mph · 988 hPa · N at 5 kt

Storm Mode · NHC Best track ·

Latest published best-track state

Weather Operations Mode
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NHC forecast for Subtropical Storm Josephine, Best track; rendered by MaverickWX
Published advisory track · Best track

Observed imagery loads separately from the advisory. The base map is not observed satellite imagery.

The cone describes center uncertainty; impacts can extend outside it.

MaverickWX map · Data: NOAA/NHC · 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.

Open the complete replay reader (works without scripting or WebGL)

Choose Forecast for a pinned issuance and valid time.

Analysis

Area, source times and interpretation

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), 00Z. Its levels are in the table below.
Observed Sounding at Sterling, VA (IAD), for (1 h 49 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)
Sterling, VA (IAD): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
1010 mb93 m15.63.6330° 3 kt
1000 mb172 m16.61.6000° 14 kt
984 mb305 m15.41.2010° 14 kt
949 mb610 m12.70.4000° 17 kt
925 mb829 m10.8-0.2355° 15 kt
910 mb965 m9.6-0.4—
889 mb1160 m12.8-30.2—
850 mb1535 m10.6-36.4010° 11 kt
820 mb1829 m9.4-37.2000° 14 kt
791 mb2134 m8.2-38.0000° 11 kt
777 mb2277 m7.6-38.4—
762 mb2438 m8.2-33.8—
734 mb2743 m6.7-34.2355° 9 kt
711 mb3006 m5.4-34.6—
700 mb3133 m4.4-31.6000° 8 kt
656 mb3658 m0.4-35.6015° 3 kt
644 mb3806 m-0.7-36.7—
634 mb3931 m-0.7-41.7—
608 mb4267 m-3.2-29.4275° 2 kt
562 mb4877 m-7.7-34.9355° 6 kt
528 mb5364 m-11.3-40.3—
504 mb5719 m-13.9-35.9—
500 mb5780 m-14.5-37.5300° 13 kt
479 mb6096 m-16.8-40.6310° 14 kt
455 mb6485 m-19.1-52.1—
431 mb6886 m-21.5-54.5—
417 mb7128 m-23.3-46.3—
406 mb7315 m-24.5-46.3300° 19 kt
400 mb7430 m-25.3-46.3290° 15 kt
390 mb7620 m-26.3-40.9285° 13 kt
358 mb8230 m-31.8-45.6285° 12 kt
343 mb8534 m-33.9-51.1265° 12 kt
331 mb8777 m-35.3-54.3—
319 mb9034 m-35.9-59.9—
301 mb9437 m-37.5-54.5—
300 mb9460 m-37.7-55.7170° 36 kt
287 mb9754 m-38.9-62.1170° 37 kt
275 mb10058 m-39.2-68.5190° 18 kt
263 mb10363 m-38.6-69.4290° 10 kt
250 mb10710 m-40.5-70.5290° 18 kt
222 mb11509 m-44.5-74.5—
200 mb12192 m-47.7-76.7305° 18 kt
200 mb12200 m-47.7-76.7305° 17 kt
182 mb12802 m-51.1-79.1305° 15 kt
162 mb13571 m-55.7-81.7—
151 mb14021 m-57.5-81.7280° 17 kt
150 mb14060 m-57.7-81.7285° 20 kt
134 mb14763 m-62.1-83.1—
121 mb15391 m-63.1-86.1—
107 mb16154 m-65.8-85.8290° 20 kt
100 mb16550 m-66.5-85.5300° 23 kt
89 mb17241 m-66.9-86.9—
79 mb17972 m-69.3-88.3300° 22 kt
68 mb18918 m-68.9-89.9—
57 mb19943 m-67.1-91.1—
45 mb21363 m-60.5-89.5—
34 mb23113 m-61.7-90.0325° 24 kt
22 mb25918 m-54.5-87.5—
11 mb30335 m-49.8-85.1255° 22 kt
8 mb32373 m-42.9-82.9—

SPC observed soundings checked · Data: NOAA/SPC

Impacts

No supported U.S. monitoring area

Current warnings in the monitoring area

None: no U.S. state or territory is under NHC’s coastal watches or warnings or inside the cone, Best track. Current geographical context; these alerts are not attributed to the cyclone.

No U.S. area

No U.S. state or territory is under NHC’s coastal watches or warnings or inside the cone. The storm’s own panels are shown, and no NWS alert is listed.

Official forecast table

Forecast points

NHC Best track · 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

+0 h from forecast cycle
37.1°N, 69.6°Wsubtropical storm55 kt · 63 mph

+3 h from forecast cycle
37.4°N, 69.5°Wsubtropical storm55 kt · 63 mph

+12 h from forecast cycle
38.1°N, 69.0°Wsubtropical storm60 kt · 69 mph

+24 h from forecast cycle
39.6°N, 66.2°Wextratropical65 kt · 75 mph

+36 h from forecast cycle
41.4°N, 61.6°Wextratropical70 kt · 81 mph

+48 h from forecast cycle
43.3°N, 56.9°Wextratropical60 kt · 69 mph

+60 h from forecast cycle
44.1°N, 53.5°Wextratropical50 kt · 58 mph

+72 h from forecast cycle
44.4°N, 50.4°Wpost tropical cyclone45 kt · 52 mph

+96 h from forecast cycle
43.5°N, 37.5°Wpost tropical cyclone40 kt · 46 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 issuanceRevision kindRecord
NHC Unnumbered state · advisorySnapshot 77cf7e1f · Selected
NHC Advisory 1 · firstSnapshot a2f96dd0
Monitoring geography and current changes
Area
None: no U.S. state or territory is under NHC’s coastal watches or warnings or inside the cone, Best track
Coastal watches and warnings: none in a U.S. state · Cone: crosses no U.S. state
Hazards
—
Window
In force now, with this advisory’s forecast
Made by
NHC’s own products, as this site’s pipeline published them, read again with each new advisory. 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 for Subtropical Storm Josephine, NHC Best track

The official forecast track, drawn by this site from NHC’s Best track (). Not an official NHC product. Data: NOAA/NHC. NHC’s own.

Wind speed probabilities

Chance of sustained wind of at least 34, 50 and 64 knots, by place
Place34 kt50 kt64 kt
Nantucket MA99%——
Sable Island92%36%6%
Hyannis MA66%——
Montauk Point63%——
Eddy Point NS59%——
Cape Race Nfld57%7%2%
Ile St Pierre56%3%—
Yarmouth NS54%——
Providence RI50%——
Sydney NS48%——
Halifax NS45%——
Burgeo Nfld32%——

NHC’s chance of sustained wind of at least each speed at each place it lists, through ; the places with the highest chance of 34 kt first. Issued . Data: NOAA/NHC. NHC’s table.

NHC’s coastal watches and warnings

NHC has no coastal watch or warning in effect for this storm.

In NHC’s words, Best track, issued . The areas NHC names, in the United States and abroad; for a place outside the United States its national service is the warning authority. Data: NOAA/NHC. NHC’s advisory.

Intensity forecast

The official intensity forecast for Subtropical Storm Josephine, NHC Best track

The official intensity forecast, drawn by this site from NHC’s Best track (). Not an official NHC product. Data: NOAA/NHC. NHC’s own.

Satellite

The storm’s page shows it on NASA GIBS (NOAA GOES, JMA Himawari)’s imagery, loaded by your browser. GOES-East at 6° from the storm's meridian.

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 Subtropical Storm Josephine, NHC Best track

The models’ tracks, which are not a forecast, drawn by this site from NHC’s Best track (). Not an official NHC product. Data: NOAA/NHC. NHC’s own.

Radar

NOAA’s radar for the area, loaded by your browser as on the Radar page.

Open the radar

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

Sources

NWS coverage unavailableSubtropical Storm Josephine · — alerts
No supported NWS monitoring area. Check local warning authorities.
Not checked

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.