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Severe weather analysis

Observations and analyses of the atmosphere now, from NWS, WPC and SPC. Not a forecast and not a warning: for those, see the Briefing and the Live tracker.

SPC soundings: feeds current

SPC soundings: Feed current; checked .

Checked means retrieved, not newly issued. Each graphic retains its issue, observation, initialization or valid time. Site publishing status is separate.

Soundings: what weather balloons measured

SPC’s skew-T diagram and hodograph of the sounding at Oakland, CA (OAK), 00Z. Its levels are in the table below.
Observed Sounding at Oakland, CA (OAK), for (7 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 (49)
Oakland, CA (OAK): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
1014 mb3 m26.88.8305° 14 kt
1000 mb128 m27.05.0315° 9 kt
983 mb279 m27.03.0—
947 mb610 m25.9-0.7275° 12 kt
925 mb814 m24.6-0.4280° 9 kt
914 mb914 m23.9-0.7275° 8 kt
900 mb1052 m23.0-1.0—
883 mb1219 m21.5-1.1245° 8 kt
850 mb1545 m18.6-1.4240° 6 kt
834 mb1707 m17.2-0.8—
822 mb1829 m16.6-2.3235° 8 kt
808 mb1977 m15.8-4.2—
793 mb2134 m14.5-5.7230° 9 kt
765 mb2438 m12.0-8.6245° 10 kt
737 mb2743 m9.4-11.5250° 8 kt
700 mb3173 m6.8-15.2335° 7 kt
660 mb3658 m3.7-21.3065° 6 kt
644 mb3853 m2.4-23.6—
612 mb4267 m-1.1-23.7060° 3 kt
596 mb4473 m-2.5-25.5—
566 mb4877 m-3.8-34.0285° 7 kt
502 mb5819 m-10.5-41.5—
500 mb5850 m-10.7-42.7330° 3 kt
484 mb6096 m-11.8-46.2005° 3 kt
474 mb6258 m-12.5-48.5—
434 mb6925 m-16.5-51.5—
412 mb7315 m-20.1-48.7030° 19 kt
400 mb7530 m-22.1-47.1025° 14 kt
381 mb7885 m-24.9-50.9—
363 mb8230 m-26.9-54.4355° 14 kt
335 mb8809 m-30.7-57.7—
319 mb9144 m-33.7-57.6325° 14 kt
300 mb9580 m-37.5-57.5320° 12 kt
289 mb9837 m-39.7-63.7—
279 mb10078 m-40.9-55.9—
268 mb10363 m-42.7-60.9290° 10 kt
256 mb10661 m-44.5-63.5—
250 mb10820 m-45.9-55.9275° 20 kt
229 mb11394 m-51.3-58.3—
212 mb11889 m-54.3-61.3—
201 mb12228 m-53.9-76.9—
200 mb12260 m-53.7-75.7270° 36 kt
183 mb12830 m-54.7-76.7—
157 mb13803 m-58.5-80.5—
150 mb14090 m-59.5-80.5255° 41 kt
138 mb14630 m-61.1-82.1245° 45 kt
125 mb15240 m-63.6-83.2265° 46 kt
105 mb16286 m-66.3-85.3—
100 mb16580 m-68.7-85.7260° 32 kt
Every station with a sounding (76)

SPC observed soundings checked · Data: NOAA/SPC

Pennsylvania briefing

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.