Flash Flood Prediction Program

-	After a couple relatively cool days temperatures will warm back into the low and mid 90's over the plains this afternoon. Surface moisture remains modest and with more daytime heating today versus yesterday in tandem with subtropical moisture in the mid and upper levels, thunderstorms will develop between noon and 1pm.
-	1-3 rounds of thunderstorms is expected through the afternoon and early evening. Weak to moderate thunderstorms will produce light to moderate rain with strong storms capable of producing heavy rainfall which may lead to excessive runoff. Storm motions are expected to be WNW to ESE or W to E at around 15mph. Strong thunderstorms may move more slowly.
-	Strong thunderstorms may also contain frequent cloud-to-ground lightning, hail and gusty winds. Conditions look to be drying out between 7-8pm as the thunderstorm activity pushes E of the District in the evening.

STORM RAINFALL POTENTIAL AND DURATION: Typical weak to moderate thunderstorms will produce 0.1-0.3" of rain. Strong thunderstorms will have the potential to produce 0.3-0.9" in 10-30 minutes. Supplemental QPF is available at https://qpf.udfcd.org

WORST CASE SCENARIO: A large, slower moving strong thunderstorm may produce up to 1.8" of rain in 45-60 minutes.

A LOOK AHEAD: Thunderstorm chances decrease a bit on Friday and further on Saturday with widely scattered storms Friday and isolated activity on Saturday. The heavy rainfall threat will decrease each day. Temperatures will warm with highs in the mid to upper 90's Friday and upper 90's to lower 100's Saturday over the plains.

Location	Prime Time	30-Minute Rainfall and % Probability	Message Potential
Plains
Adams	100 PM TO 800 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Arapahoe	100 PM TO 800 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Boulder	100 PM TO 800 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Broomfield	100 PM TO 800 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Denver	100 PM TO 800 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Douglas	100 PM TO 800 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Jefferson	100 PM TO 800 PM	0.1" (75%) to 0.3" (50%) to 0.9" (15%)	MOD
Foothills above 6500ft
Boulder	1200 PM TO 800 PM	0.1" (80%) to 0.3" (60%) to 0.9" (15%)	MOD
Douglas	1200 PM TO 800 PM	0.1" (80%) to 0.3" (60%) to 0.9" (15%)	MOD
Jefferson	1200 PM TO 800 PM	0.1" (80%) to 0.3" (60%) to 0.9" (15%)	MOD

MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.