SPC Day 1 outlook
- General Thunderstorms Risk
SPC’s Day 1 categorical outlook, valid to , issued . SPC’s categories, as drawn. Data: NOAA/SPC.
Map
This map draws the contiguous United States, and Puerto Rico is beyond it. What is in force there is listed under “In force in this area”.
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”.
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
0 major · 0 moderate · 1 minor · 0 at action stage
- minor Lago Guajataca QUEP4, observed
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
- Minor Impacts
- Moderate Impacts
- Major Impacts
- Extreme Impacts
Highest in this area, by day and by cause
- Day 1
- nothing drawn
- Day 2
- nothing drawn
- Day 3
- nothing drawn
- Snow amount, Days 1–3
- nothing drawn
- 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%
- 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, the 24 hours to , WPC’s forecast from . Each band runs to the next. 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
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 04:38Z.
The products’ own words and times, and what is no longer in force since the last read. Never written by AI.