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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 Slidell, LA (LIX), 00Z. Its levels are in the table below.
Observed Sounding at Slidell, LA (LIX), for (5 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)
Slidell, LA (LIX): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
1015 mb10 m30.018.0325° 1 kt
1000 mb141 m25.817.8355° 19 kt
981 mb305 m24.217.2345° 24 kt
948 mb610 m21.416.7000° 28 kt
925 mb821 m19.616.0350° 26 kt
910 mb962 m19.615.7—
868 mb1368 m16.613.8—
852 mb1524 m15.612.8355° 10 kt
850 mb1547 m15.412.7355° 8 kt
822 mb1829 m12.911.8000° 5 kt
806 mb1996 m12.49.9—
793 mb2134 m11.69.3335° 8 kt
764 mb2438 m9.98.1315° 11 kt
747 mb2631 m8.87.3—
737 mb2743 m8.56.3305° 18 kt
725 mb2879 m8.64.2—
714 mb3006 m8.20.2—
700 mb3169 m6.8-0.2270° 18 kt
661 mb3638 m4.21.0—
651 mb3763 m3.41.6—
637 mb3940 m3.4-0.8—
626 mb4081 m2.6-2.4—
612 mb4264 m1.6-2.9—
591 mb4546 m0.8-7.2—
577 mb4739 m-0.3-9.3—
564 mb4921 m-1.7-11.7—
544 mb5208 m-3.9-12.9—
532 mb5384 m-4.9-20.9—
522 mb5533 m-5.5-20.5—
511 mb5700 m-6.3-26.3—
500 mb5870 m-7.5-26.5260° 21 kt
490 mb6026 m-8.7-22.7—
474 mb6281 m-10.5-24.5—
462 mb6477 m-10.1-25.1—
451 mb6662 m-9.9-41.9—
425 mb7114 m-13.5-40.5—
413 mb7330 m-14.5-42.5—
400 mb7570 m-16.3-45.3270° 35 kt
390 mb7761 m-17.7-45.7—
380 mb7955 m-19.5-45.5—
368 mb8194 m-19.9-48.9—
345 mb8671 m-23.5-48.5—
335 mb8886 m-25.3-42.3—
313 mb9377 m-28.7-36.7—
300 mb9680 m-31.3-56.3255° 42 kt
261 mb10647 m-39.3-61.3—
251 mb10913 m-41.7-51.7—
250 mb10940 m-41.9-48.9270° 30 kt
238 mb11271 m-44.7-51.7—
228 mb11556 m-46.7-57.7—
218 mb11851 m-49.1-62.1—
207 mb12192 m-51.9-70.0265° 31 kt
200 mb12410 m-53.7-69.7270° 35 kt
187 mb12839 m-55.7-64.7—
177 mb13187 m-58.3-72.3—
155 mb14017 m-61.7-81.7—
150 mb14220 m-62.5-81.5255° 33 kt
133 mb14953 m-66.5-83.5—
122 mb15472 m-68.9-83.9—
111 mb16031 m-72.7-84.7—
100 mb16640 m-72.5-85.5255° 25 kt
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.