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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 Las Vegas, NV (VEF), 00Z. Its levels are in the table below.
Observed Sounding at Las Vegas, NV (VEF), for (5 h 6 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)
Las Vegas, NV (VEF): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
942 mb697 m28.01.0035° 11 kt
925 mb862 m24.6-0.4050° 22 kt
887 mb1219 m21.1-1.0030° 18 kt
857 mb1524 m18.1-1.5055° 16 kt
850 mb1591 m17.4-1.6050° 16 kt
826 mb1829 m15.4-2.1060° 18 kt
796 mb2134 m12.8-2.7050° 16 kt
768 mb2438 m10.2-3.3045° 16 kt
740 mb2743 m7.6-3.9055° 12 kt
714 mb3048 m5.0-4.5080° 11 kt
700 mb3205 m4.8-4.2120° 17 kt
687 mb3353 m4.3-8.0135° 19 kt
663 mb3646 m3.0-15.0—
642 mb3907 m2.2-20.8—
629 mb4072 m2.2-24.8—
591 mb4572 m-0.9-27.9—
569 mb4877 m-3.2-31.1095° 25 kt
547 mb5182 m-5.5-34.3100° 27 kt
526 mb5486 m-8.0-34.3100° 27 kt
506 mb5791 m-10.6-33.5120° 23 kt
500 mb5880 m-11.3-33.3120° 22 kt
486 mb6096 m-13.1-33.0125° 24 kt
467 mb6401 m-15.7-32.5135° 22 kt
449 mb6692 m-18.1-32.1—
439 mb6859 m-19.5-33.5—
423 mb7133 m-21.5-37.5—
413 mb7315 m-23.3-38.2125° 32 kt
400 mb7540 m-25.3-40.3125° 28 kt
379 mb7925 m-27.5-48.5110° 32 kt
366 mb8181 m-28.9-53.9—
348 mb8534 m-32.1-55.0095° 31 kt
333 mb8839 m-34.9-55.6095° 29 kt
319 mb9144 m-36.9-57.5095° 32 kt
305 mb9449 m-39.0-60.0080° 31 kt
300 mb9570 m-39.9-60.9080° 32 kt
279 mb10058 m-42.7-68.4090° 32 kt
267 mb10363 m-44.4-70.4090° 36 kt
255 mb10668 m-46.0-72.0095° 36 kt
250 mb10800 m-46.7-72.7100° 34 kt
239 mb11097 m-48.5-74.5—
225 mb11493 m-50.9-74.9—
213 mb11850 m-49.9-74.9—
202 mb12192 m-51.2-78.2085° 30 kt
200 mb12260 m-51.1-79.1075° 35 kt
184 mb12802 m-52.9-82.1055° 10 kt
162 mb13617 m-52.1-81.1—
150 mb14110 m-55.1-83.1085° 10 kt
140 mb14548 m-58.7-85.7—
126 mb15207 m-61.5-87.5—
115 mb15769 m-64.5-89.5—
103 mb16459 m-66.9-91.0235° 7 kt
100 mb16620 m-68.3-92.3210° 9 kt
88 mb17361 m-70.7-94.7—
76 mb18288 m-69.1-93.1215° 7 kt
65 mb19202 m-69.0-93.3200° 15 kt
53 mb20414 m-64.7-88.7—
43 mb21720 m-61.7-87.7—
31 mb23692 m-56.7-82.7—
21 mb26213 m-54.8-80.8290° 14 kt
12 mb29910 m-49.5-76.5—
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.