RETAINED OPEN-SOURCE SIGNALS

History, without losing context.

Search and explore the rolling 30-day signal archive. Historical presence shows what sources reported at the time; it is not independent verification.

2,618signals in August30-DAY HISTORICAL INDEX
A2 / HISTORICAL WIRE

August 2026

2,618 results
climate / P5United States

Severe Thunderstorm Warning issued August 29 at 10:56PM CDT until August 29 at 11:15PM CDT by NWS Sioux Falls SD

SVRFSD The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Southwestern Beadle County in east central South Dakota... * Until 1115 PM CDT. * At 1056 PM CDT, a severe thunderstorm was located over Rosehill Dam, or 19 miles southeast of Miller, moving southeast at 30 mph. HAZARD.…

space / P4Europe

EXTENDED WARNING: Geomagnetic K-index of 4 expected

Space Weather Message Code: WARK04 Serial Number: 5410 Issue Time: 2026 Aug 30 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5409 Valid From: 2026 Aug 28 1409 UTC Now Valid Until: 2026 Aug 30 2359 UTC Warning Condition: Persistence NOAA Space Weather Scale…