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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 EDW, 18Z. Its levels are in the table below.
Observed Sounding at EDW, for (35 h 6 min ago) older than the last two launches. 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 (39)
EDW: the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
939 mb702 m21.8-3.2060° 5 kt
927 mb832 m19.4-3.6—
925 mb854 m19.6-3.4060° 12 kt
890 mb1185 m18.0-5.0—
850 mb1575 m14.4-5.6040° 27 kt
825 mb1829 m12.2-5.4040° 32 kt
798 mb2103 m9.8-5.2—
766 mb2438 m7.8-6.3045° 39 kt
738 mb2743 m5.9-7.2045° 39 kt
711 mb3048 m4.0-8.2045° 41 kt
700 mb3179 m4.6-9.4045° 33 kt
659 mb3658 m1.8-11.3045° 35 kt
635 mb3962 m-0.2-12.6050° 28 kt
611 mb4267 m-2.2-13.9040° 25 kt
588 mb4572 m-4.2-15.2030° 24 kt
566 mb4877 m-6.2-16.5030° 24 kt
524 mb5486 m-9.3-22.2030° 24 kt
503 mb5791 m-11.7-24.7000° 19 kt
500 mb5840 m-12.1-25.1000° 19 kt
483 mb6096 m-14.2-26.9010° 19 kt
427 mb7010 m-21.5-33.1020° 14 kt
400 mb7500 m-25.5-36.5010° 18 kt
377 mb7925 m-29.3-39.7020° 21 kt
334 mb8781 m-37.3-42.3—
317 mb9144 m-39.0-55.8000° 22 kt
303 mb9449 m-40.7-60.9350° 19 kt
300 mb9520 m-41.1-62.1355° 27 kt
290 mb9754 m-41.1-64.7350° 27 kt
267 mb10311 m-38.5-69.5—
253 mb10668 m-39.3-70.3330° 47 kt
250 mb10760 m-39.5-70.5335° 47 kt
232 mb11278 m-42.5-70.8340° 44 kt
217 mb11721 m-45.1-71.1—
200 mb12270 m-43.9-75.9340° 63 kt
168 mb13411 m-52.2-78.9330° 44 kt
153 mb14021 m-57.0-80.6295° 34 kt
150 mb14140 m-57.9-80.9295° 37 kt
139 mb14616 m-61.5-82.5—
132 mb14935 m-61.9-82.9—
Every station with a sounding (78)

SPC observed soundings checked · Data: NOAA/SPC

District of Columbia 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.