Meteorology · Ship Routing · Observation
Climate Signals

Climate & Space Weather

The longer-term context behind today's weather, plus the weather above the weather. Ocean heat content, surface temperature departures, sea ice, ENSO and MJO state — and the sun above it all: live solar imagery from NOAA SUVI aboard GOES, geomagnetic activity from NOAA SWPC, aurora forecasts. Curated launchers and live data into Climate Reanalyzer at the University of Maine and the NOAA Space Weather Prediction Center.

Daily Sea Surface Temperature

NOAA OISST v2.1

Daily SST and anomaly maps from the dataset behind the viral 2023–24 ocean-warmth charts. One to two-day lag from real time. Region selector for the world, North Atlantic, Pacific, Gulf, Indian Ocean, and the main hurricane main development region.

Daily · ~2-day lag Launch viewer →

Daily 2m Air Temperature

ECMWF ERA5

Surface air temperature and departure from the 1979–2000 climatological normal, daily. The atmospheric companion to SST — where the ocean and the air boundary meet, rendered as a global anomaly field.

Daily Map Animation

Combined viewer

Animated viewer for SST, 2m air temperature, and sea ice concentration. Date slider plays back through any year and basin. The fastest way to see how an anomaly evolved week over week, season over season.

Daily · full archive Launch viewer →

Monthly SST

NOAA ERSSTv5

Monthly aggregated SST and anomaly maps back to 1854 (gridded reanalysis). Long-term context for the daily snapshots — month-by-month, year-by-year, the full instrumental record visible in one place.

Monthly · 170-year archive Launch viewer →
RMM Phase Diagram · Bureau of Meteorology (Australia)
MJO RMM phase diagram, last 40 days
Wheeler–Hendon RMM (Real-time Multivariate MJO) index, the canonical 8-phase Indo–Pacific phase diagram. Trace shows the last 40 days. Inside the unit circle = MJO inactive; outside = active. Phases 4–7 typically enhance Pacific tropical convection and modulate North American extreme precipitation.
Niño Region SST Anomaly Time Series · NOAA CPC
Weekly SST anomalies — Niño 1+2, 3, 3.4, 4 regions
Weekly mean SST anomaly time series for all four Niño regions (1+2, 3, 3.4, 4). The Niño 3.4 line (5°S–5°N, 170°W–120°W) is the canonical El Niño / La Niña indicator. Above +0.5°C sustained = El Niño; below −0.5°C = La Niña. Click through for the full CPC ENSO monitoring suite.

Sea Ice Concentration

NSIDC

National Snow and Ice Data Center, University of Colorado. Arctic and Antarctic sea ice extent, daily and monthly. The polar boundary of the climate system — where the ocean meets the cryosphere.

NOAA SUVI · GOES Solar Ultraviolet Imager
NOAA SUVI latest solar image
Updated every few minutes from the Solar Ultraviolet Imager aboard the operational GOES satellite. Each wavelength captures a different layer of the sun — 304Å the chromosphere, 171Å the quiet corona, 195Å hot corona and flare plasma, 284Å active regions. SUVI is NOAA SWPC's operational space-weather imager (functionally similar to NASA SDO, which has been offline since December 2025).
Planetary Kp Index · NOAA SWPC
 
Kp is the global geomagnetic activity index, 0 to 9, updated every 3 hours from eight worldwide magnetometers. Above 5 and geomagnetic storms are in progress — aurora visible further south, HF radio communications degraded, GNSS precision reduced.
NOAA SWPC OVATION · 30-minute aurora forecast
OVATION northern hemisphere aurora forecast
OVATION (Oval Variation, Assessment, Tracking, Intensity, and Online Nowcasting) model. Predicts aurora intensity and location 30–90 minutes ahead. Refreshes every 5 minutes.

Real-Time Solar Wind

NOAA SWPC · DSCOVR + ACE

Live solar-wind parameters from the DSCOVR spacecraft at L1, with ACE as backup. Interplanetary magnetic field magnitude, Bz component (southward is the one that drives storms), solar wind speed, density, dynamic pressure. The data that runs ~30–60 minutes ahead of geomagnetic impact at Earth.

1-minute cadence Launch viewer →

Helioviewer

NASA + ESA · Multi-mission solar archive

NASA and ESA's joint solar-imaging platform. Combines SDO, STEREO, SOHO, and ground-telescope imagery into one interactive viewer, with solar-event markers overlaid (flares, CMEs, active regions, filaments). Build your own movies, zoom into any date and wavelength. The tool heliophysicists actually use.

Continuous archive Launch Helioviewer →

Daily anomaly imagery from Climate Reanalyzer, University of Maine Climate Change Institute (CC-BY-4.0). Climate indices from NOAA Climate Prediction Center and the National Snow and Ice Data Center at the University of Colorado. Solar imagery from NOAA's Solar Ultraviolet Imager (SUVI) aboard the operational GOES satellite. Kp index, aurora forecasts, and real-time solar wind also from the NOAA Space Weather Prediction Center. Helioviewer maintained jointly by NASA and ESA.