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One example concerns tornadogenesis, with tornadoes most likely if the dew point depression is 20 °F (11 °C) or less, and the likelihood of large, intense tornadoes increasing as dew point depression decreases. LCL height also factors in downburst and microburst activity.
[171] [172] The intense supercell that had produced the tornadoes in Oklahoma the previous day continued into May 10, accompanied by dew points above 70 °F (21 °C) and a moderately unstable environment characterized by CAPE values between 2500 and 3000 J/kg; [162] [173] the storm spawned a final F1 tornado in Creek County at 05:25 UTC (12:25 ...
While wind shear patterns and instability were conductive for the development of supercells and possibly strong tornadoes, the event was forecast to materialize as a major derecho event. Still, the elevated helicity values reaching 300 m 2 /s 2 , and elevated dew points reaching into the 60s, aided the issuance of a large 15%, hatched risk for ...
The red line is temperature, the green line is the dew point, and the black line is the air parcel lifted. In meteorology, convective available potential energy (commonly abbreviated as CAPE), [1] is a measure of the capacity of the atmosphere to support upward air movement that can lead to cloud formation and storms.
Dew points were near record levels in eastern Colorado, a key ingredient for the severe weather outbreak. The dew point is a temperature scale that helps forecasters analyze how much moisture is ...
On May 23, the SPC issued an Enhanced risk over central Nebraska to Western Iowa for the threat of damaging winds. Conditions weren't quite as favorable this day compared to others with dew points only expected to reach the upper 50s °F, creating conditions for high-base supercells, lowering the tornado potential.
And it is worth noting that immediately before the tornadoes this week, there were tons of record-high temperatures and record-high dew-point levels in the atmosphere being set.
This increased dew points in the area into the 50 °F (10 °C) range; orographic lift and up-slope flow was expected to trigger the development of storms. The SPC issued a small slight risk for severe thunderstorms around the Black Hills into central Nebraska, with the main threat being large hail and the possibility of an isolated tornado.