US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
305 PM EDT Tue Aug 27 2019
 
Valid Friday August 30 2019 - Tuesday September 03 2019
 
Hazards:
- Heavy rain across portions of the Central and Southern Plains, Fri-Sat, Aug 30-Aug 31.
- Heavy rain across portions of the Southeast, Sun-Tue, Sep 1-Sep 3.
- Flooding possible across portions of the Central Plains.
- Flooding occurring or imminent across portions of the Central Plains and the Northern Plains.
- Excessive heat across portions of Southeastern California and the Southwest, Fri-Sat, Aug 30-Aug 
31.
- High winds across portions of northeastern/coastal Florida, Sun, Sep 1.
- Heavy rain across portions of mainland Alaska and the Aleutians, Sun-Tue, Sep 1-Sep 3.
- High winds across portions of mainland Alaska and the Aleutians, Sun, Sep 1.
 
Detailed Summary:

On Friday/Saturday, two frontal boundaries over the central Plains will focus an area of showers 
and thunderstorms as a mid-level shortwave sinks southeastward. With a strong increase in available 
moisture, a threat of heavy rain is expected as a mesoscale convective system potentially organizes 
and moves into the Southern Plains by Saturday. Several inches of rain are possible within the 
highlighted area from southern Nebraska to southern Oklahoma. 

In the Southwest, another couple days of excessive heat will be possible Friday/Saturday from the 
lower deserts along the Colorado River into the Phoenix/Tucson areas. Temperatures are expected to 
reach into the 110s which may approach record highs in some locations. 

Over Florida, the National Hurricane Center takes Tropical Storm Dorian to the Florida Space coast 
by Sunday morning. This would increase the chance of high winds and heavy rain across much of 
Florida into next week with a possibility of heavy rainfall spreading northward and westward 
through the Southeast U.S. thereafter. Please consult the latest National Hurricane Center forecast 
for Dorian.

In Alaska, a significant occluded cyclone is expected to bring heavy rain into the central/eastern 
Aleutians on Sunday then eastward along coastal sections of southern Alaska into next 
Monday/Tuesday. Also, southwestern Alaska from Bristol Bay to the Kuskokwim River may see heavy 
rain as the triple point lifts northeastward.  Some strong winds are possible through the Aleutians 
into southern coastal Alaska near 40-50kts.

Fracasso