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STORM MODEWeather tracking workspace

Storm Mode · Severe weather event

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Agency warning geometry · no observed imagery displayed

Map

NWS’s polygons as issued, or the zones a zone-issued alert names; SPC’s watches by their counties. Checked . Data: NOAA/NWS, NOAA/SPC.

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ⓘ About this map

Outlines: NOAA/NWS · Radar cells: IEM/NEXRAD. Outlines are warned areas, not storm paths.

Interactive imagery loads separately. Missing radar does not remove warnings or imply clear weather.

Change time or forecast product

Recorded weather · gaps are marked. Coverage begins with recording activation.

Live sources keep independent clocks.

Replay coverage and interpretation

Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.

Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.

No observed replay frame displayed.

Open the complete replay reader (works without scripting or WebGL)

Analysis and guidance

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Current weather

ReportsAnalysis and guidanceRadar

Observations

Coastal observationsRadar-derived cellsStations and river gauges

Severe storms

SPC Day 1 outlookWatchesMesoscale discussions

Rain and flooding

Flash-flood risk, Day 1River gauges in floodRain expected and rain that fell

Analysis

Area, source times and interpretation

Current cached context, independently dated. Regional reference: TX; a reference within a wider monitoring area does not replace the complete warning geography. This section remains separate from the historical replay cursor and official cyclone forecast. Use Forecast to pin a retained model package.

Soundings: what weather balloons measured

SPC’s skew-T diagram and hodograph of the sounding at Sterling, VA (IAD), 00Z. Its levels are in the table below.
Observed Sounding at Sterling, VA (IAD), for (10 h 14 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 (59)
Sterling, VA (IAD): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
999 mb93 m15.47.4135° 6 kt
974 mb305 m15.76.8140° 17 kt
960 mb427 m14.86.8—
939 mb610 m14.75.7175° 21 kt
925 mb738 m13.84.8190° 21 kt
906 mb914 m12.34.5190° 20 kt
873 mb1219 m9.74.0205° 20 kt
850 mb1444 m7.83.6220° 21 kt
823 mb1710 m6.41.4—
811 mb1829 m5.51.4250° 16 kt
797 mb1972 m4.41.3—
781 mb2134 m3.40.1275° 14 kt
755 mb2411 m1.6-2.1—
738 mb2595 m2.4-7.6—
725 mb2743 m1.5-9.1265° 26 kt
700 mb3020 m-0.3-9.3250° 26 kt
663 mb3452 m-3.5-10.5—
646 mb3658 m-4.4-14.1255° 29 kt
620 mb3981 m-5.7-19.7—
598 mb4267 m-7.8-20.9250° 27 kt
569 mb4648 m-10.5-22.5—
556 mb4826 m-11.7-25.7—
512 mb5452 m-16.7-25.7—
500 mb5630 m-17.9-29.9250° 33 kt
476 mb5996 m-20.7-32.7—
458 mb6280 m-22.5-38.5—
419 mb6927 m-26.9-41.9—
406 mb7153 m-28.3-41.3—
400 mb7260 m-29.1-41.1250° 47 kt
388 mb7476 m-30.5-41.5—
376 mb7698 m-32.1-35.0—
364 mb7926 m-33.5-41.5—
339 mb8419 m-37.3-44.3—
322 mb8772 m-39.5-48.5—
305 mb9144 m-43.1-47.6255° 56 kt
300 mb9250 m-44.1-48.1250° 54 kt
282 mb9663 m-47.7-51.3—
268 mb9998 m-50.3-54.6—
253 mb10363 m-52.9-55.4260° 58 kt
250 mb10450 m-53.5-56.2255° 60 kt
240 mb10712 m-55.5-58.6—
227 mb11066 m-56.9-64.9—
214 mb11437 m-59.5-67.5—
201 mb11829 m-60.9-67.9—
200 mb11860 m-61.3-68.3250° 73 kt
190 mb12192 m-61.1-74.5255° 77 kt
177 mb12617 m-60.5-77.5—
167 mb12981 m-57.5-79.5—
156 mb13411 m-60.2-80.9245° 77 kt
150 mb13650 m-60.1-82.1255° 76 kt
128 mb14630 m-60.5-83.5265° 77 kt
116 mb15240 m-61.7-84.3260° 54 kt
105 mb15850 m-63.5-85.1270° 43 kt
100 mb16160 m-64.5-85.5260° 51 kt
90 mb16825 m-62.1-86.1—
78 mb17686 m-63.0-86.9280° 40 kt
62 mb19084 m-63.1-88.1—
52 mb20169 m-63.8-88.3275° 13 kt
42 mb21475 m-60.9-87.9—
Every station with a sounding (76)

SPC observed soundings checked · Data: NOAA/SPC

Radar-derived cells (0) · current

Collector checked ; feed generated . Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.

    Station and river observations (153)

    Surface source current; observed water-level source current. Each reading keeps its own time. Map markers show at most 500 stations and 500 gauges; the complete source directory is paginated.

    Circle: surface station; square: water-level gauge. Filled: current reading and source; hollow: stale, unconfirmed or missing observation. Marker color is not a hazard category. Enable “Stations and gauges” in Layers to inspect them on the map.

    Showing 100 of 153 listed sources. All surface stations and retained trends · All supported gauges and forecasts

    About this monitored event

    This event, as this site’s operators set it up

    Kind
    Severe weather
    Window
    Open: no start or end was set
    Updated

    Spotlight

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    Monitoring area details
    Area
    Texas (NWS states: TX)
    Hazards
    Tornado, severe thunderstorm, flash flood, river flood, areal flood, coastal flood and other warnings, watches and advisories, and the forecasts for them
    Window
    In force now, with the next days of SPC’s and WPC’s products
    Made by
    This site’s operators, in its admin console. Nothing about a reader is stored. Watch another area

    An area the operators chose, not a storm’s footprint: everything here is in force in this area, never “from this event”.

    Alerts in this area

    No warning, watch or advisory for these hazards is in force in this area.

    NWS’s alerts checked : a successful check, so this is none in force, not “can’t tell”.

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    0AlertsTest123
    No alerts in Test123 ·