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Drought?


Wilted white snakeroot at Schenley Park, 4 July 2022 (photograph by Kate St. John)

9 July 2022

Scorching dry climate since early June has turned the grass brown and brought on low water in Pittsburgh space streams. By the Fourth of July leaves have been wilting in Schenley Park and Little Sewickley’s creek mattress was uncovered at Sneed’s.

Low water exposes the creekbed of Little Sewickley Creek at Sneeds, 4 July 2022 (photograph by Karyn Delaney)

Precipitation had modified in solely 5 weeks from 1.20 inches above regular on the finish of Could to -1.58 inches beneath regular on 4 July. A thunderstorm on 6 July diminished the deficit to -1.24 inches beneath regular this morning. (See statistics on the NWS Pittsburgh Native Local weather web page.)

Are we in a drought?

Not likely. Regardless of wilting leaves this week’s U.S. Drought Monitor map places most of Pennsylvania within the regular vary. (S=short-term impacts, L=long run impacts)

U.S. Drought Monitor map, 5 July 2022 (map from US Drought Monitor at UNL)

The Drought Severity Index (Lengthy Time period Palmer) map, beneath, is each predictive and extra wonderful grained. It exhibits a touch of drought in 4 southwestern Pennsylvania areas (pale yellow) and excessive drought within the U.S. West and Southwest (orange). The shock to me is the acute long run drought in jap North and South Carolina, evident on each drought maps. Northeastern North Carolina wants 12 inches of rain to get again to regular (click on right here for the map).

Lengthy Time period Palmer Drought Severity Index by county (map from NOAA Local weather Prediction Middle)

It’s reassuring to know that Pittsburgh isn’t heading for extreme drought. I really feel dangerous for all of the areas coloured scary crimson and orange.

(images by Kate St. John and Karyn Delaney, maps from US Drought Monitor at UNL and NOAA Local weather Prediction Middle)

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