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Post-Tropical Cyclone Hernan

25 kt · 29 mph · 1009 hPa

Storm Mode · NHC Advisory · 15 Aug 18:00Z

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NHC forecast for Post-Tropical Cyclone Hernan, Advisory; rendered by MaverickWX

Published advisory track · Advisory

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MaverickWX map · Data: NOAA/NHC · not an official graphic

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Analysis

Area, source times and interpretation

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Soundings: what weather balloons measured

SPC’s skew-T diagram and hodograph of the sounding at North Platte, NE (LBF), 18Z. Its levels are in the table below. — Observed Sounding at North Platte, NE (LBF), for 18:00Z (2 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 (54)

North Platte, NE (LBF): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
Pressure	Height	Temperature	Dew point	Wind
927 mb	849 m	7.4	4.9	015° 11 kt
925 mb	870 m	7.0	3.7	010° 13 kt
886 mb	1219 m	3.6	1.4	010° 16 kt
870 mb	1366 m	2.2	0.6	—
853 mb	1524 m	5.4	4.0	030° 32 kt
850 mb	1554 m	6.2	5.0	035° 31 kt
833 mb	1720 m	6.2	5.7	—
822 mb	1829 m	6.5	6.4	055° 15 kt
795 mb	2105 m	8.6	8.6	—
781 mb	2252 m	7.6	7.0	—
764 mb	2438 m	8.5	6.2	175° 12 kt
745 mb	2642 m	7.8	4.7	—
718 mb	2946 m	5.2	3.0	—
700 mb	3153 m	4.2	1.6	220° 25 kt
683 mb	3353 m	2.8	0.5	225° 26 kt
658 mb	3658 m	0.6	-1.0	205° 26 kt
641 mb	3865 m	-0.3	-2.5	—
609 mb	4267 m	-3.0	-6.9	200° 43 kt
564 mb	4877 m	-6.8	-9.5	200° 56 kt
542 mb	5182 m	-8.7	-10.4	215° 39 kt
521 mb	5486 m	-10.6	-11.3	215° 36 kt
501 mb	5791 m	-11.8	-12.1	215° 43 kt
500 mb	5810 m	-11.9	-12.1	210° 48 kt
486 mb	6026 m	-12.9	-13.0	—
463 mb	6401 m	-15.1	-15.9	210° 53 kt
449 mb	6624 m	-16.5	-17.5	—
426 mb	7010 m	-19.0	-19.5	215° 48 kt
415 mb	7209 m	-20.3	-20.5	—
400 mb	7480 m	-22.1	-23.3	220° 54 kt
376 mb	7925 m	-25.1	-26.6	215° 52 kt
361 mb	8230 m	-27.3	-28.4	215° 53 kt
346 mb	8534 m	-29.4	-30.6	215° 52 kt
336 mb	8744 m	-30.9	-32.3	—
318 mb	9144 m	-34.1	-35.6	215° 57 kt
307 mb	9380 m	-35.9	-37.2	—
300 mb	9540 m	-37.5	-38.6	215° 57 kt
282 mb	9964 m	-41.1	-41.8	—
270 mb	10257 m	-43.5	-44.2	—
254 mb	10668 m	-46.9	-47.6	215° 65 kt
250 mb	10770 m	-47.9	-48.7	215° 65 kt
236 mb	11147 m	-51.3	-52.5	—
226 mb	11426 m	-53.1	-54.0	—
211 mb	11867 m	-54.5	-56.4	—
201 mb	12178 m	-54.5	-57.0	—
200 mb	12210 m	-54.7	-57.4	215° 56 kt
189 mb	12571 m	-55.1	-57.9	—
174 mb	13106 m	-57.8	-61.4	225° 58 kt
162 mb	13542 m	-59.1	-62.2	—
150 mb	14020 m	-62.1	-64.5	215° 58 kt
139 mb	14492 m	-62.1	-64.5	—
129 mb	14952 m	-64.1	-66.5	—
116 mb	15600 m	-66.1	-68.1	—
106 mb	16154 m	-66.4	-69.1	225° 36 kt
100 mb	16500 m	-65.7	-69.3	245° 43 kt

Every station with a sounding (77)

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

Storm details

NHC Advisory · 15 Aug 18:00Z

Center position: 15.8°N, 135.4°W
Minimum pressure: 1009 hPa
Maximum sustained wind: 25 kt · 29 mph
Movement: Not reported
Since comparison advisory: Comparison unavailable

Official source link not retained.

Forecast cycle Time not published. Center position belongs to the official state’s time, not imagery time.

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Data coverage

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

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Impacts

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Coastal alertsCoastal alert data unavailable; not an all-clear Flooding rainOfficial rainfall context and coverage Storm surgeAvailability and coastal-only product limits Warnings in monitored areaNWS coverage unavailable here; not a global all-clear

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, Advisory. Current geographical context; these alerts are not attributed to the cyclone.

No U.S. area

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Official forecast table

Forecast points

NHC Advisory · advisory 15 Aug 18:00Z · forecast cycle Time not published. Forecast positions are future estimates, not observed imagery. Classification is shown only where published.

No official forecast points are published for this issuance. An invest is not given a fabricated cyclone forecast.

Advisory history and records

Advisory history

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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, Advisory
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
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All published products and source descriptions

Forecast track

The official forecast track, drawn by this site from NHC’s Advisory (18:00Z). Not an official NHC product. Data: NOAA/NHC.

Wind speed probabilities

NHC’s wind speed probabilities are not reported for this advisory.

NHC’s coastal watches and warnings

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Intensity forecast

The official intensity forecast, drawn by this site from NHC’s Advisory (18:00Z). Not an official NHC product. Data: NOAA/NHC.

Satellite

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Imagery from NASA GIBS: NOAA GOES and JMA Himawari.

Model guidance

The models’ tracks, which are not a forecast for Post-Tropical Cyclone Hernan, NHC Advisory

The models’ tracks, which are not a forecast, drawn by this site from NHC’s Advisory (18:00Z). Not an official NHC product. Data: NOAA/NHC.

Radar

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Sources

NHC advisory, as published checked 20:48Z
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NWS coverage unavailablePost-Tropical Cyclone Hernan · — 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.