District of ColumbiaSite status

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 Nashville, TN (BNA), 00Z. Its levels are in the table below.
Observed Sounding at Nashville, TN (BNA), 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)
Nashville, TN (BNA): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
1002 mb210 m12.45.4340° 7 kt
1000 mb197 m11.85.8320° 8 kt
987 mb305 m10.85.2335° 11 kt
951 mb610 m8.03.4320° 17 kt
925 mb841 m5.82.1345° 24 kt
904 mb1028 m4.61.1—
883 mb1219 m3.5-0.6340° 30 kt
871 mb1330 m2.8-1.6—
855 mb1480 m1.6-2.5—
850 mb1527 m1.2-3.0335° 28 kt
819 mb1829 m-0.2-6.0335° 23 kt
798 mb2033 m-1.1-8.1—
788 mb2134 m-0.7-8.5325° 15 kt
777 mb2246 m-0.9-7.9—
758 mb2438 m-1.2-8.4285° 27 kt
730 mb2743 m-3.0-8.0280° 34 kt
702 mb3048 m-4.8-7.7275° 45 kt
700 mb3074 m-4.9-7.7275° 42 kt
676 mb3353 m-3.3-4.5260° 49 kt
665 mb3480 m-2.5-3.0—
650 mb3658 m-2.5-3.0240° 39 kt
636 mb3834 m-2.3-2.4—
626 mb3962 m-2.8-3.1225° 41 kt
602 mb4267 m-4.0-4.8230° 51 kt
588 mb4455 m-4.7-5.8—
566 mb4755 m-6.9-8.4—
538 mb5150 m-8.9-9.8—
508 mb5590 m-14.5-20.5—
500 mb5710 m-14.1-20.1240° 78 kt
490 mb5863 m-12.5-15.8—
456 mb6401 m-14.3-16.9235° 86 kt
446 mb6577 m-14.7-16.9—
421 mb7010 m-18.0-23.4230° 82 kt
404 mb7316 m-17.7-23.7240° 87 kt
400 mb7390 m-17.9-23.9240° 90 kt
388 mb7620 m-19.5-25.5240° 89 kt
372 mb7925 m-21.6-27.4245° 88 kt
357 mb8230 m-23.8-29.3240° 88 kt
341 mb8566 m-26.3-31.3—
328 mb8839 m-28.5-33.3235° 83 kt
315 mb9144 m-30.9-35.4240° 89 kt
300 mb9480 m-33.5-38.0245° 91 kt
277 mb10032 m-38.7-42.5—
264 mb10359 m-40.0-45.3255° 100 kt
252 mb10668 m-41.3-48.0255° 100 kt
250 mb10730 m-41.5-48.5250° 82 kt
237 mb11092 m-43.1-51.1—
222 mb11531 m-47.1-55.1—
210 mb11887 m-48.5-56.5235° 88 kt
200 mb12220 m-49.5-57.5240° 84 kt
185 mb12726 m-52.7-60.7—
174 mb13106 m-54.8-62.2240° 72 kt
163 mb13534 m-56.7-63.7—
153 mb13935 m-57.1-64.1—
150 mb14060 m-58.1-65.1245° 75 kt
137 mb14626 m-61.1-68.1—
127 mb15093 m-62.7-69.7—
117 mb15594 m-65.3-71.3—
107 mb16154 m-67.3-73.3255° 56 kt
100 mb16540 m-66.9-72.9255° 40 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.