Tropical Storm Warning issued July 20 at 10:02PM CDT by NWS New Orleans LA (National Weather Service, United States). Affected area: Mississippi Sound; Lake Borgne; Breton Sound; Chandeleur Sound; Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm; Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM; Coastal Waters from Stake Island LA to Southwest Pass of the Mississippi River from 20 to 60 nm; Coastal waters from Pascagoula Mississippi to Stake Island Louisiana out 20 to 60 NM.
What this means for you
Most space weather passes without anyone noticing – but events like this are exactly why we watch the data. If conditions escalate, the first things affected are GPS accuracy, shortwave radio and, in severe cases, power grids. Now is a good moment to make sure your devices are charged and you know where your backup light sources are.
We track this in real time on our Space Weather Command Center – live storm levels, aurora maps and official NOAA alerts, explained in plain English.
Detected automatically from NOAA Space Weather Prediction Center data, July 21, 2026 at 03:15 UTC.
Source: National Weather Service (NWS)
Related Reading
Sky & Solar Conditions at the Time
Moon: First Quarter (47% illuminated), in Libra.
Notable planetary angles: Mars sextile Saturn (61°), Mercury square Saturn (92°), Venus square Mars (87°), Sun square Moon (86°).
Concurrent space weather: planetary Kp index 2.3; strongest recent solar flare: M3.5-class.
This is a factual snapshot, not a claim of cause and effect – researchers are divided on whether lunar, planetary or solar factors influence seismic or weather activity. It’s included so readers can track the pattern for themselves over time.
