SPC Day 1 outlook
- General Thunderstorms Risk
- Marginal Risk
SPC’s Day 1 categorical outlook, valid to , issued . SPC’s categories, as drawn. Data: NOAA/SPC.
STORM MODEWeather tracking workspace
CURRENT CONTEXT · 0 warnings total · 0 tornado warnings · 0 alerts including watches and advisories
Current alert feed · checked
Alerts in area
0 of 0 alertsNo active alerts reported by the current feed in this monitoring area.
Watched places
Places saved on this device appear here with scripting enabled.
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.
Agency warning geometry · no observed imagery displayed
Interactive imagery loads separately. Missing radar does not remove warnings or imply clear weather.
Alert outlines: NOAA/NWS; cell points/observed segments: IEM/NEXRAD. A warning polygon is not a tornado footprint.
Lightning activity — GOES GLM
Total lightning, including in-cloud activity. Not ground-strike locations or a safe-to-go-outside signal.
Cached lightning observations have not loaded. An empty map is not zero lightning.
Snow analysis — NOHRSC
Source-rendered snow depth and snow water equivalent for the lower 48. History changes this snow picture only; warnings and radar keep their own clocks.
Stored snow depth · footprint valid 2026-10-19 12:00:00 UTC, picture retrieved 2026-10-19 18:08:05.996 UTC.
No NOHRSC picture displayed on the interactive map.
0 - 0.39 in
0.39 - 2.0 in
2.0 - 3.9 in
3.9 - 9.8 in
9.8 - 20 in
20 - 39 in
39 - 59 in
59 - 98 in
98 - 197 in
197 - 295 in
295 - 394 in
394 - 787 in
NOHRSC footprint times are metadata; pixel analysis time is not independently verified. Snow-depth pixels have previously differed from the footprint time. This is modeled/assimilated snow analysis, not a measurement at a place. Unshaded and no-data areas do not establish zero snow.
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)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 (33)
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.
- K00U · K00U · current ·
- K1S3 · K1S3 · current ·
- K3U3 · K3U3 · current ·
- K6S0 · K6S0 · current ·
- K6S8 · K6S8 · current ·
- K7S0 · K7S0 · current ·
- K9S2 · K9S2 · current ·
- KBHK · KBHK · current ·
- KBTM · KBTM · current ·
- KBZN · KBZN · current ·
- KCTB · KCTB · current ·
- KDLN · KDLN · current ·
- KEKS · KEKS · current ·
- KGGW · KGGW · current ·
- KGPI · KGPI · current ·
- KGTF · KGTF · current ·
- KHLN · KHLN · current ·
- KHRF · KHRF · current ·
- KHVR · KHVR · current ·
- KJDN · KJDN · current ·
- KLVM · KLVM · current ·
- KM46 · KM46 · current ·
- KM75 · KM75 · current ·
- KMLS · KMLS · current ·
- KMSO · KMSO · current ·
- KMVH · KMVH · current ·
- KOLF · KOLF · current ·
- KPO1 · KPO1 · current ·
- KPWD · KPWD · current ·
- KRVF · KRVF · current ·
- KS34 · KS34 · current ·
- KSBX · KSBX · current ·
- KWYS · KWYS · current ·
Showing 33 of 33 listed sources. All surface stations and retained trends · All supported gauges and forecasts
Selected details
CloseSurface station KMLS
current · Observed 2026-10-19 17:53:00 UTC · wind 19 kt, gust 25 kt · temperature 16.7 °C.
Station KMLS · -105.8834, 46.4265 (longitude, latitude).
Source checked 2026-10-19 18:15:06.479Z · current.
Station observations, not an address forecast or cyclone maximum wind. Maintenance-flagged, old and implausible reports are excluded by the existing parser; this is not independent NWS quality control.
Retained observations: 24; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:07.108Z; oldest available reading 2026-10-18 18:53:00 UTC.
Temperature, dew point and pressure trends
Observed reports as a table (24)
| Observed (UTC) | Wind / gust (kt) | From (° true) | Temperature / dew point (°C) | Pressure (mb) | Visibility (mi) |
|---|---|---|---|---|---|
| 2026-10-18 18:53:00 UTC | 13 / Not reported | 60 | 16.1 / -2.2 | 1021.9 | 10 or more |
| 2026-10-18 19:53:00 UTC | 10 / 21 | 60 | 16.7 / -3.9 | 1021.6 | 10 or more |
| 2026-10-18 20:53:00 UTC | 10 / Not reported | 70 | 17.2 / -2.8 | 1021.3 | 10 or more |
| 2026-10-18 21:53:00 UTC | 15 / Not reported | 50 | 16.1 / -1.7 | 1021.5 | 10 or more |
| 2026-10-18 22:53:00 UTC | 13 / Not reported | 60 | 15 / -1.7 | 1021.7 | 10 or more |
| 2026-10-18 23:53:00 UTC | 11 / Not reported | 60 | 13.3 / -2.2 | 1022.4 | 10 or more |
| 2026-10-19 00:53:00 UTC | 8 / Not reported | 60 | 11.1 / -2.2 | 1022.8 | 10 or more |
| 2026-10-19 01:53:00 UTC | 6 / Not reported | 60 | 10.6 / -1.7 | 1023.3 | 10 or more |
| 2026-10-19 02:53:00 UTC | 6 / Not reported | 30 | 7.2 / -0.6 | 1023.4 | 10 or more |
| 2026-10-19 03:53:00 UTC | 6 / Not reported | 40 | 6.7 / -0.6 | 1022.8 | 10 or more |
| 2026-10-19 04:53:00 UTC | 7 / Not reported | 50 | 6.7 / -1.1 | 1022.5 | 10 or more |
| 2026-10-19 05:53:00 UTC | 7 / Not reported | 30 | 5 / -1.1 | 1022.3 | 10 or more |
| 2026-10-19 06:53:00 UTC | 6 / Not reported | 110 | 7.8 / -2.8 | 1021.5 | 10 or more |
| 2026-10-19 07:53:00 UTC | 5 / Not reported | 100 | 7.2 / -3.3 | 1021 | 10 or more |
| 2026-10-19 08:53:00 UTC | 7 / Not reported | 120 | 8.9 / -2.8 | 1020.3 | 10 or more |
| 2026-10-19 09:53:00 UTC | 6 / Not reported | 120 | 7.8 / -2.8 | 1020.7 | 10 or more |
| 2026-10-19 10:53:00 UTC | 9 / Not reported | 120 | 7.8 / -1.7 | 1020.4 | 10 or more |
| 2026-10-19 11:53:00 UTC | 10 / Not reported | 140 | 7.2 / -2.2 | 1020.3 | 10 or more |
| 2026-10-19 12:53:00 UTC | 11 / Not reported | 130 | 7.8 / -1.7 | 1020.3 | 10 or more |
| 2026-10-19 13:53:00 UTC | 9 / Not reported | 150 | 7.2 / -1.7 | 1020.4 | 10 or more |
| 2026-10-19 14:53:00 UTC | 14 / 23 | 140 | 8.9 / -1.1 | 1020.7 | 10 or more |
| 2026-10-19 15:53:00 UTC | 13 / 21 | 150 | 11.1 / -0.6 | 1020.6 | 10 or more |
| 2026-10-19 16:53:00 UTC | 14 / 23 | 150 | 14.4 / 0 | 1019.5 | 10 or more |
| 2026-10-19 17:53:00 UTC | 19 / 25 | 160 | 16.7 / 1.1 | 1018.6 | 10 or more |
Capture times, quality and provenance
Each report keeps its observation time, first capture of this version, and the SHA-256 of the source bulk body. Corrections at the same observation time replace that point and are marked; unrelated bulk-file changes do not freshen a report.
- Observed 2026-10-18 18:53:00 UTC, captured 2026-10-18 19:00:07.238Z; source body SHA-256
c8c7bf2521e3c623950397dfd039df565cf852dd75a4ae77434570113aa24ac0. - Observed 2026-10-18 19:53:00 UTC, captured 2026-10-18 20:00:08.326Z; source body SHA-256
f55c120983c1d4afefc386254de68db7adfdebaade89a34bc496e1d8d0aeea35. - Observed 2026-10-18 20:53:00 UTC, captured 2026-10-18 21:00:06.974Z; source body SHA-256
72b18b638884212191cd2eec7395ea466d2356f74e126ca465d8f0364e301f18. - Observed 2026-10-18 21:53:00 UTC, captured 2026-10-18 22:00:06.677Z; source body SHA-256
0535ef28a47dc495c7d5e8aea2840db12259dd38f2a8f1bbba1927c7663b50fc. - Observed 2026-10-18 22:53:00 UTC, captured 2026-10-18 23:00:06.922Z; source body SHA-256
6bf9643ca5d357f9e91bd835f24387c1b9becc5ea4aed9c15715bb973312227f. - Observed 2026-10-18 23:53:00 UTC, captured 2026-10-19 00:00:07.745Z; source body SHA-256
f27e6e2068400c13f556e92b85f9114d1697c0dd3bfd5b20aa224b1f13e06937. - Observed 2026-10-19 00:53:00 UTC, captured 2026-10-19 01:00:09.902Z; source body SHA-256
48479954be175603383d5a0bb69f719b3e73eee0f54f2025423a4ccd3a9321d4. - Observed 2026-10-19 01:53:00 UTC, captured 2026-10-19 02:00:09.244Z; source body SHA-256
9bf4c0352a992641a4b0755255648adc344711f432f3ef01a0af1cbb83b7a509. - Observed 2026-10-19 02:53:00 UTC, captured 2026-10-19 03:00:06.767Z; source body SHA-256
aebb9e08edc4cafed420cedec404cb2fd31eaf57fac51996b9b254827cabe2b3. - Observed 2026-10-19 03:53:00 UTC, captured 2026-10-19 04:00:08.880Z; source body SHA-256
a5ba914b097742a9404847e95668dcc73a3a2c6a502cb28aeeefb35607721711. - Observed 2026-10-19 04:53:00 UTC, captured 2026-10-19 05:00:08.271Z; source body SHA-256
44ebfaecfaed2633c6a6fd6da06ec31b9be5350d99159320379247517084010e. - Observed 2026-10-19 05:53:00 UTC, captured 2026-10-19 06:00:09.522Z; source body SHA-256
f8bdd9a8a002c48648749748490c19a95f494410f1b05f906a2c3fde35035cf2. - Observed 2026-10-19 06:53:00 UTC, captured 2026-10-19 07:00:07.241Z; source body SHA-256
c308cdb155c67192eeb5edb59b2c374809c387f491b511ae51eae66354f28f30. - Observed 2026-10-19 07:53:00 UTC, captured 2026-10-19 08:00:10.883Z; source body SHA-256
8b46d70a47c6411c6fd877142e13b02a7f48431c2d5447a2348aa8fe97db34bd. - Observed 2026-10-19 08:53:00 UTC, captured 2026-10-19 09:00:08.431Z; source body SHA-256
13062479a71b5bb74d010d8875e4295b0a9d301b3e191f6ff8eee53c0e7d440f. - Observed 2026-10-19 09:53:00 UTC, captured 2026-10-19 10:00:08.904Z; source body SHA-256
898105085be605568f553969e3cc7057f45193c5badc6b7f42c3461d7c54b61f. - Observed 2026-10-19 10:53:00 UTC, captured 2026-10-19 11:00:08.806Z; source body SHA-256
9e210489541778eddfa1dbc0aacc0326b93d6b9baae2ff086c039b7fb1738e97. - Observed 2026-10-19 11:53:00 UTC, captured 2026-10-19 12:00:07.984Z; source body SHA-256
e3eb4fa226c550e24bfe4e6d810ddd667c150c9aa5d8321ceb42b510c8647463. - Observed 2026-10-19 12:53:00 UTC, captured 2026-10-19 13:00:09.593Z; source body SHA-256
4a170c6bb46f27be0b35f7b5b9e57cf91d47a617bec8cdc0855a53e94f5186d5. - Observed 2026-10-19 13:53:00 UTC, captured 2026-10-19 14:00:07.994Z; source body SHA-256
421cddb50fa5e938325d008aae3112cd6433c09ecbdf23ff5bbb141918aad9dc. - Observed 2026-10-19 14:53:00 UTC, captured 2026-10-19 15:15:08.491Z; source body SHA-256
cd51f2aca846e40e46c309fd4c522320fbef79f706027cc6ef804eb0e0384648. - Observed 2026-10-19 15:53:00 UTC, captured 2026-10-19 16:00:07.894Z; source body SHA-256
98cf863cee36ea3cef63310783a6faba17823c72e7a12247a73d555cdb3a9851. - Observed 2026-10-19 16:53:00 UTC, captured 2026-10-19 17:00:07.608Z; source body SHA-256
e804aa1153be32e6dcf08a3775d0959fe0000a5f4163da9e112699cf0396eb08. - Observed 2026-10-19 17:53:00 UTC, captured 2026-10-19 18:00:09.195Z; source body SHA-256
2ec779d92663c376f5dde0537558e0cd1418583ce48d933fa234a8bfe4d55ee0.
Values use the decoded station report. Null means not reported, never zero. Gust is kept separate from sustained wind.
Observation source page · Cached readings as JSON · Official source
Recent changes
- 72-hour rainfall · updated · Collected
- River forecasts · updated · Collected
- gauges forecast · updated · Collected
- 24-hour rainfall · updated · Collected
- office afd · updated · Collected
- NWS alerts · updated · Collected
- NWS alerts · updated · Collected
- HRRR forecast · updated · Collected
Recording coverage and limits
- warnings: retained from 2026-10-18T18:26:30.085Z through 2026-10-19T18:26:05.693Z
- outlooks: retained from 2026-10-18T18:26:30.085Z through 2026-10-19T18:25:07.797Z
- hydro: retained from 2026-10-18T18:26:30.085Z through 2026-10-19T18:25:09.271Z
- analysis: retained from 2026-10-18T18:26:30.085Z through 2026-10-19T18:15:09.861Z
- winter: retained from 2026-10-18T18:26:30.085Z through 2026-10-19T18:23:05.217Z
Source changes and imagery have separate recording coverage. Open Replay for retained weather frames.
Checks every minute; each layer keeps its own time.
Analysis
Current cached context, independently dated. Regional reference: MT; 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.
Surface: what stations observe and WPC analyses
On the map
- Observed temperature, °F, above-left of the station
- Observed dew point, °F, below-left
- Observed temperature and dew point are left off the map on a screen this narrow: the table below lists every station’s.
- Observed wind: the staff points to where it blows from; a full barb is 10 kt, a half 5, a pennant 50; a ring is calm
- Analysis cold front
- Analysis warm front
- Analysis stationary front
- Analysis occluded front
- Analysis dry line
- Analysis trough
- Analysis high and low pressure centres, with their pressure in millibars
WPC’s bulletin does not say which side of a front its symbols go, so this map draws no triangles or half-circles; each front is named on the map and in the list.
Observed 2,309 stations, each at its own time, most between and . Airport and other automated stations’ reports (METARs), as AviationWeather.gov decodes them. Left out: 449 reports flagged by the station for maintenance and no reports that cannot be right; no other quality control is applied here.
Analysis WPC’s surface analysis valid , issued . A forecaster’s analysis of the fronts and pressure centres at that hour, every three hours.
- Stationary front across Kansas, Colorado, Wyoming and Montana
- Stationary front across Montana and Idaho
Every station in Montana (33)
| Station | Observed | Temperature | Dew point | Wind | Pressure | Visibility | Weather |
|---|---|---|---|---|---|---|---|
| K00U | 54 °F | 37 °F | calm | — | 10+ mi | — | |
| K1S3 | 63 °F | 37 °F | 150° 8 kt | — | 10+ mi | — | |
| K3U3 | 64 °F | 27 °F | 130° 12 kt, gusts 17 kt | — | 10+ mi | — | |
| K6S0 | 59 °F | 32 °F | 250° 4 kt | — | 10+ mi | — | |
| K6S8 | 57 °F | 37 °F | not given | — | 10+ mi | — | |
| K7S0 | 50 °F | 41 °F | calm | — | 10+ mi | — | |
| K9S2 | 57 °F | 32 °F | 160° 20 kt, gusts 31 kt | — | 10+ mi | — | |
| KBHK | 58 °F | 31 °F | 140° 19 kt, gusts 28 kt | 1022.5 mb | 10+ mi | — | |
| KBTM | 53 °F | 33 °F | 340° 4 kt | 1017.6 mb | 10+ mi | — | |
| KBZN | 55 °F | 37 °F | 280° 3 kt | 1017.3 mb | 10+ mi | — | |
| KCTB | 45 °F | 31 °F | 150° 4 kt | 1015.1 mb | 10+ mi | — | |
| KDLN | 57 °F | 30 °F | 200° 4 kt | 1016.0 mb | 10+ mi | — | |
| KEKS | 64 °F | 27 °F | 290° 17 kt | — | 10+ mi | — | |
| KGGW | 60 °F | 35 °F | 160° 12 kt, gusts 20 kt | 1017.3 mb | 10+ mi | — | |
| KGPI | 49 °F | 35 °F | 060° 5 kt | 1016.5 mb | 10+ mi | — | |
| KGTF | 63 °F | 35 °F | 210° 8 kt | 1014.8 mb | 10+ mi | — | |
| KHLN | 47 °F | 37 °F | 310° 3 kt | 1019.0 mb | 10+ mi | — | |
| KHRF | 50 °F | 39 °F | calm | — | 10+ mi | — | |
| KHVR | 50 °F | 33 °F | calm | 1016.2 mb | 10+ mi | — | |
| KJDN | 61 °F | 34 °F | 190° 13 kt, gusts 19 kt | 1017.7 mb | — | — | |
| KLVM | 64 °F | 29 °F | 230° 16 kt, gusts 21 kt | 1016.0 mb | 10+ mi | — | |
| KM46 | 60 °F | 36 °F | 170° 10 kt | — | 10+ mi | — | |
| KM75 | 57 °F | 32 °F | 160° 8 kt, gusts 14 kt | — | 10+ mi | — | |
| KMLS | 62 °F | 34 °F | 160° 19 kt, gusts 25 kt | 1018.6 mb | 10+ mi | — | |
| KMSO | 47 °F | 38 °F | calm | 1016.6 mb | 10+ mi | — | |
| KMVH | 66 °F | 30 °F | 230° 10 kt, gusts 15 kt | — | 10+ mi | — | |
| KOLF | 61 °F | 32 °F | 160° 11 kt, gusts 21 kt | 1020.0 mb | 10+ mi | — | |
| KPO1 | 63 °F | 32 °F | 160° 18 kt, gusts 26 kt | — | 10+ mi | — | |
| KPWD | 55 °F | 27 °F | 160° 21 kt, gusts 27 kt | — | 10+ mi | — | |
| KRVF | 57 °F | 36 °F | variable 4 kt, gusts 10 kt | — | 10+ mi | — | |
| KS34 | 50 °F | 41 °F | calm | — | 10+ mi | — | |
| KSBX | 50 °F | 41 °F | 160° 3 kt | — | 10+ mi | — | |
| KWYS | 46 °F | 28 °F | calm | — | 10+ mi | — |
Surface observations checked · Data: NOAA/NWS Aviation Weather Center
WPC surface analysis checked · Data: NOAA/WPC
Spotlight: SPC Day 1 outlook
1 of 15Watches
No tornado or severe thunderstorm watch in force in this area.
SPC’s watches, by number, matched by the counties they list. Data: NOAA/SPC.
Mesoscale discussions
No mesoscale discussion reaches this area.
SPC’s mesoscale discussions whose outline reaches the area. Data: NOAA/SPC.
Storm ingredients
SPC’s hourly mesoanalysis, observed soundings and model guidance for the area, on the Analysis tab with its own clocks.
Drawn by the Analysis tab’s own renderer. Data: NOAA/SPC, NOAA/NCEP.
Flash-flood risk, Day 1
- Marginal
WPC’s excessive rainfall outlook, to , issued : a chance of flash flooding, in four categories. Data: NOAA/WPC.
River gauges in flood
No river, coastal or lake gauge in this area is in flood, observed or forecast.
NWS’s gauges at flood stage or above in the area, worst first, each with its forecast hydrograph on Rain & rivers. Data: NOAA/NWPS.
Rain expected and rain that fell
WPC’s rain forecast and MRMS’s radar estimate of the rain that fell, on the Briefing’s map for the area.
Data: NOAA/WPC, NOAA/NSSL MRMS.
Winter Storm Severity Index
WPC: “WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.”
- Winter Weather Area highest in this area
- Minor Impacts
- Moderate Impacts
- Major Impacts
- Extreme Impacts
Highest in this area, by day and by cause
- Day 1
- Winter Weather Area
- Day 2
- Winter Weather Area
- Day 3
- nothing drawn
- Snow amount, Days 1–3
- Winter Weather Area
- Snow load, Days 1–3
- nothing drawn
- Ice, Days 1–3
- nothing drawn
- Blowing snow, Days 1–3
- nothing drawn
Each day and cause on the Winter tab, with its own issue time
WPC’s WSSI, overall impact, Days 1–3, valid to , issued . WPC issues each day and cause on its own clock. Not a warning, and not a chance. Data: NOAA/NWS/WPC.
Chance of Moderate impacts or worse, Day 1
WPC: “WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.”
- 5–10% (not drawn)
- 10–20% (not drawn)
- 20–30% (not drawn)
- 30–40% (not drawn)
- 40–50% (not drawn)
- 50–60% (not drawn)
- 60–70% (not drawn)
- 70–80% (not drawn)
- 80–90% (not drawn)
- 90–95% (not drawn)
- 95% or more (not drawn)
Each level and day on the Winter tab
WPC’s WSSI-P: no chance drawn for Day 1. Data: NOAA/NWS/WPC.
Chance of at least 4 inches of snow, Day 1
WPC gives no chance of 4 inches of snow or more in this area over the next three days, so Day 1’s 4 inches is shown.
- Slight: at least 10%
- Moderate: at least 40%
- High: at least 70%
Every day and amount on the Winter tab
WPC’s Probabilistic Winter Precipitation Forecast, to , issued . Outlines, as WPC draws them. Data: NOAA/NWS/WPC.
Winter watches, warnings and advisories
No winter or cold watch, warning or advisory in force in this area.
NWS’s winter and cold alerts in force in the area, by event as issued, each counted once, with the offices that issued them and the latest end. Data: NOAA/NWS.
Snow on the ground
NOHRSC snow depth and snow water equivalent use the source’s original pictures and legends, with qualified footprint times. Open the cached source page for availability and retained history. This wall has no snow picture to rotate; missing imagery does not mean no snow.
Data: NOAA/NWS/NOHRSC. Snow analysis, not a measurement at a place.
WPC’s heavy snow and icing discussion
Southern Sierra Nevada
Day 3...
A highly anomalous upper-low off the Southern CA coast (standardized anomalies as much as -4 sigma at 500mb and 700mb by 12Z Wed) will work in tandem with an upper-level ridge over the Nation's Heartland to tap into rich tropical East Pacific moisture and direct this moisture at the Southwest U.S.. 850-500mb mean flow out of the south will provide a favorable setup for upslope- enhanced precipitation rates long the southern Sierra Nevada. That said, the antecedent air-mass is not overly cold and the colder temperatures within the closed low are well offshore. This will keep snowfall confined to the higher elevations of the southern Sierra Nevada on Wednesday (above 9,000ft). The Probabilistic Precipitation Portal (PPP) shows low chances (10-30%) for snowfall totals >4" above 10,000ft. The Probabilistic Winter Storm Severity Index (WSSI-P) also show low chances (10-30%) as low as 9,000ft in elevations. This could result in some slick conditions in the rugged terrain of the southern Sierra Nevada mid-week.
Issued , for to . WPC’s words, as written. Data: NOAA/NWS/WPC.
The tropics
NHC’s and JTWC’s storms, their official graphics and the watches and warnings for them. Storm Mode’s own tropical panels arrive with its tropical events.
Data: NOAA/NHC, JTWC.
Radar
NOAA’s radar for the area, loaded by your browser as on the Radar page.
Live tiles; the radar keeps no last-good copy.
What changed, last 60 minutes
since , when this server began watching this areaNothing has changed since 18:26Z.
The products’ own words and times, and what is no longer in force since the last read. Never written by AI.
Monitoring area details
- Area
- Montana (NWS states: MT)
- Hazards
- Every kind of warning, watch and advisory this site carries
- Window
- In force now, with the next days of SPC’s and WPC’s products
- Made by
- This address: anyone can make one, and nothing is stored. Change the area or hazards
An area you chose, not a storm’s footprint: everything here is in force in this area, never “from this storm”.
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”.
Sources
NWS warnings and SPC watches checked
NWS watches and advisories checked
SPC mesoscale discussions checked
SPC Day 1 outlook checked
WPC excessive rainfall checked
NWPS river gauges checked
WPC WSSI checked
WPC WSSI-P checked
WPC snow and ice chances checked
WPC heavy snow and icing discussion checked
Radar live tiles, no last-good copy
No active alerts reported in this monitoring area.
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.