Northern Blackland Prairie

The Austin Camp Mabry station recorded mean daily high of 99.8°F over the past 30 days, 9.7°F above normal for this period. Sustained heat above normal into early October increases evaporative stress and fire danger during what would typically be the tail of the dry season.

Greenthroat Darter was documented on 2026-09-11 at Lost Creek Boulevard, Austin. This endemic Texas species is classified as Near Threatened globally and requires clear, flowing water in river drainages where it naturally occurs.

Guadalupe Bass was observed on 2026-09-18 in Austin. This endemic Texas species is listed as Near Threatened globally and remains part of a major native fish restoration program. Active conservation has restored populations to 14 river systems after decades of decline from hybridization with introduced smallmouth bass.

Little Black Caddisflies were observed on 2026-10-02 at Windsor Park, Austin, joining a week of caddisfly activity across the area. Caddisfly larvae require clean, oxygenated flowing water, making their presence an indicator of good water quality in local streams.

Tall goldenrod was in open flower on October 1 at Terravista Drive, Austin. The extended warmth in September, with mean daily highs 9.7°F above normal, likely accelerated flowering phenology into fall, typical when late-summer heat delays bloom timing or extends the growing season.

Magnolia Warblers confirmed on October 4 at Hornsby Bend with 26 separate reports, the highest count among flagged warbler species. This boreal-breeding species shows major movement through the ecosystem during southbound migration to Central America.

Tennessee Warblers with 3 individuals and Rose-breasted Grosbeaks confirmed on October 5 at local parks mark peak fall warbler passage through central Texas. Both species breed in eastern North America and migrate to Central and South American wintering grounds. The October timing aligns with the expected migration window.

Austin Camp Mabry, 6 km from Northern Blackland Prairie, recorded mean daily high of 101.8°F over the past 30 days, 8.2°F above the normal of 93.6°F for these calendar days. The warmest day reached 107°F on August 22, combining with the deficit rainfall to drive drought intensification and reduce streamflow.

September 2025 brought 0.5 in of precipitation to Travis County, 2.7 in below the 1901-2000 normal of 3.2 in, ranking it the 9th driest September in 131 years of record. Current conditions show month-to-date rainfall of 0.1 in, 1.8 in below normal by September 21, extending a pattern of exceptional seasonal dryness.

Guadalupe Bass (listed as Threatened on iNaturalist) were observed on 2026-09-18 in Bull Creek and 2026-09-03 near Bull Creek; Greenthroat Darter (Threatened) was documented on 2026-09-11 at Lost Creek Boulevard, Austin. Both species are endemic to Texas streams and require flowing, clear water habitats that drought and flow alteration threaten.