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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 (12 h 7 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 (62)
Sterling, VA (IAD): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
1021 mb93 m14.04.0280° 2 kt
1000 mb268 m14.22.2005° 5 kt
960 mb610 m11.10.1330° 7 kt
934 mb839 m10.0-5.0—
925 mb919 m9.8-6.2345° 18 kt
915 mb1009 m9.4-12.6—
894 mb1201 m7.8-17.2—
860 mb1524 m6.3-7.5005° 16 kt
850 mb1616 m6.8-10.2355° 22 kt
828 mb1829 m6.7-12.4350° 26 kt
816 mb1951 m5.8-9.2—
798 mb2134 m4.7-12.9345° 24 kt
783 mb2287 m3.6-12.4—
773 mb2392 m2.8-7.2—
761 mb2518 m2.2-1.1—
746 mb2679 m1.6-2.7—
735 mb2799 m1.6-6.4—
720 mb2965 m2.2-4.8—
700 mb3192 m0.6-5.4300° 21 kt
680 mb3424 m-1.1-5.6—
662 mb3637 m-2.3-4.3—
651 mb3770 m-2.7-5.8—
620 mb4156 m-5.1-5.7—
604 mb4361 m-4.7-9.2—
538 mb5261 m-10.9-13.2—
522 mb5492 m-12.5-15.4—
510 mb5669 m-12.9-16.3—
500 mb5820 m-14.1-17.4290° 26 kt
482 mb6096 m-16.3-19.0290° 25 kt
449 mb6628 m-20.5-22.1—
422 mb7087 m-22.7-24.2—
411 mb7281 m-22.9-24.9—
400 mb7480 m-23.5-25.7285° 37 kt
388 mb7702 m-24.5-27.7—
376 mb7925 m-26.1-28.2275° 42 kt
364 mb8163 m-27.7-28.8—
346 mb8525 m-30.3-32.2—
336 mb8733 m-32.1-35.1—
300 mb9520 m-38.5-42.3275° 56 kt
288 mb9800 m-40.5-44.1—
275 mb10114 m-43.1-49.1—
263 mb10414 m-45.9-49.8—
250 mb10750 m-48.7-53.6280° 58 kt
234 mb11179 m-52.1-60.1—
221 mb11544 m-55.5-63.5—
206 mb11986 m-58.7-63.7—
200 mb12170 m-60.3-67.3275° 71 kt
172 mb13095 m-67.6-73.9270° 81 kt
161 mb13495 m-68.1-74.1—
150 mb13920 m-69.9-76.9285° 68 kt
137 mb14466 m-64.7-82.7—
121 mb15240 m-64.8-83.6275° 63 kt
109 mb15850 m-66.7-85.1295° 53 kt
100 mb16370 m-65.9-85.9285° 63 kt
82 mb17575 m-65.9-87.9285° 43 kt
71 mb18445 m-64.3-88.3—
60 mb19489 m-62.5-89.4275° 32 kt
50 mb20610 m-64.9-89.9310° 27 kt
40 mb21974 m-64.3-89.8270° 19 kt
30 mb23740 m-60.7-89.7270° 39 kt
20 mb26290 m-57.7-88.7275° 56 kt
18 mb27061 m-56.3-88.3—
Every station with a sounding (77)

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 (146)

    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 146 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”.

    In force 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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