US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
428 PM EDT Thu Jun 27 2019
 
Valid Sunday June 30 2019 - Thursday July 04 2019
 
Hazards:
- Heavy rain across portions of the Lower Mississippi Valley and the Southern Plains, Tue-Thu, Jul 
2-Jul 4.
- Heavy rain across portions of the Central Plains, the Upper Mississippi Valley, and the Northern 
Plains, Sun-Mon, Jun 30-Jul 1.
- Heavy rain across portions of the Upper Mississippi Valley and the Northern Plains, Wed-Thu, Jul 
3-Jul 4.
- Flooding possible across portions of the Middle and Upper Mississippi Valley.
- Flooding occurring or imminent across portions of the Central Plains, the Middle and Lower 
Mississippi Valley, the Southern Plains, and the Ohio Valley.
- Flooding likely across portions of the Central Plains and the Middle Mississippi Valley.
- Excessive heat across portions of the Central Plains, the Upper Mississippi Valley, and the 
Northern Plains, Sun, Jun 30.
- Excessive heat across portions of the Southeast and the Mid-Atlantic, Mon-Thu, Jul 1-Jul 4.
- Enhanced wildfire risk across portions of the mainland Alaska, Sun-Thu, Jun 30-Jul 4.
- Excessive heat across portions of mainland Alaska, Sun, Jun 30.
 
Detailed Summary:

Gulf moisture will be drawn northward into the central and northern U.S. and will pool over the 
area. These high dewpoint values, when combined with afternoon temperatures in the 80s and 90s, 
will make the airmass feel like its 105 to 110. These will meet the threshold for excessive heat 
over portions of the Northern Plains and the Upper Mississippi Valley. Much of the Southeast and 
Carolinas will also have excessive heat through the next week, as upper-level ridging and strong 
surface high pressure keeps temperatures well into the 90s and low 100s. The strong surface high 
pressure centered over the Southeast and the eastern part of Gulf of Mexico will help direct a 
steady stream of high moisture into the western Gulf Coast. With upper-level energy crossing over 
the Lower Rio Grande Valley and encountering the moisture-rich airmass, showers and thunderstorms 
capable of producing heavy rainfall along the Texas Coast will develop over the western Gulf 
Tuesday through Thursday.  

Mainland Alaska, from the Kenai Peninsula into portions of the Alaska Range, will hot and dry with 
temperatures over 20 degrees above normal. The excessive heat will quickly lessen after Sunday. 
These hot and dry conditions will also increase the risk for the spread of wildfires. The elevated 
fire weather risk over the Alaska mainland south of the Brooks Range eastward to the U. S./Canadian 
border and as far south as the Kuskokwim Mountains to parts of the Cook Inlet and Kenal Peninsula 
will continue into Thursday.

Campbell