Severe Thunderstorms and Heavy Rainfall in the Southern Plains; Heat Continues in the West

Strong to severe thunderstorms may bring areas of excessive rainfall and flooding over parts of the southern Plains today through Friday. Hot to dangerously hot temperatures are forecast across portions of the Pacific Northwest and southern Great Basin today. Gusty winds, dry, and hot conditions will bring critical fire weather to parts of central Washington state today. Read More >

Overview

The 2018 Kentucky Derby in Louisville will go down as the wettest ever. 3.15" of rain was recorded at Louisville International Airport on May 5, shattering the previous wettest Kentucky Derby and the daily record for May 5.

Record Rainfall in Louisville during 2018 Kentucky Derby

Flooding
Radar
Environment

Flooding


South Fork Beargrass Creek gage near Audubon Park	South Fork Beargrass Creek near Germantown	Flooding on ramp for I-64/I-264

Radar and Rainfall Totals:

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Louisville metro 24 hr precip	Forecast Area 24 hour precip	Radar Loop 2 pm to 5 pm EDT

Environment

The environment supported some heavy rainfall with Precipitable Water (PWAT) values highest across the TN and lower OH Valleys.


Figure 1: 19z Precipitable Water (PWAT)	Figure 2: 19z 850 mb moisture transport	Figure 3: 19z Upwind Propagation Vector

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Severe Thunderstorms and Heavy Rainfall in the Southern Plains; Heat Continues in the West

2018 Kentucky Derby Wettest Ever