US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
353 PM EDT Thu Jun 06 2019
 
Valid Sunday June 09 2019 - Thursday June 13 2019
 
Hazards:
- Heavy rain across portions of the Southeast, Mon-Tue, Jun 10-Jun 11.
- Heavy rain across portions of the Central/Southern Appalachians, the Tennessee Valley, the 
Mid-Atlantic, the Southeast, the Great Lakes, and the Ohio Valley, Sun-Wed, Jun 9-Jun 12.
- Flooding possible across portions of the Central/Southern Plains, the Middle/Lower Mississippi 
Valley, and the Ohio Valley.
- Flooding occurring or imminent across portions of the Plains, the Mississippi Valley, the Great 
Lakes, the Northern Great Basin, and the Ohio Valley.
- Flooding likely across portions of the Central Plains, the Northern Rockies, and the Northern 
Great Basin.
- Excessive heat across portions of the Lower Mississippi Valley and the Southern Plains, Sun-Mon, 
Jun 9-Jun 10.
- Much above normal temperatures across portions of California, the Central Great Basin, the 
Pacific Northwest, the Northern Rockies, and the Northern Great Basin, Mon-Thu, Jun 10-Jun 13.
- High winds across portions of the Aleutians, Tue-Wed, Jun 11-Jun 12.
 
Detailed Summary:

Low pressure over the Tennessee Valley will give way to a front moving eastward from the Upper 
Midwest roughly southwestward to the Southern High Plains by Tuesday as the front moves to the 
Eastern Seaboard.  Deep tropical moisture over the eastern third of the country will aid in 
producing heavy rain over parts of the Mid-Atlantic to the Southern Appalachians on Sunday into 
Tuesday.  In addition, the low over the Tennessee Valley will merge into the eastward moving front 
Monday into Tuesday.  The front and low will aid to produce an area of heavy rain over parts of the 
Florida Gulf Coast on Monday and Tuesday.  

Upper-level ridging will develop over the Pacific Northwest on Sunday and continue to strengthen 
through Wednesday.  Surface temperatures will rise into the upper 70's into the mid 80's and that 
is about 10 to 20 degrees above average temperatures for the region.  Thus, prompting a region of 
much above normal temperatures to be drawn over the Pacific Northwest into parts of Central 
California on Monday into Thursday.    

Similarly, an upper-level ridging over Mexico extending into Texas will aid in developing surface 
temperatures in the upper 90's and mid 100's with dew points in the upper 60's into the low 70's.  
The maximum temperatures are only 10 to 12 degrees above average over the Western Gulf Coast on 
Sunday and drop to near average temperatures on Monday.  With the high dew point and temperatures 
above 100 degrees an area of excessive heat over the Western Gulf Coast on Sunday into Monday.  

A deep low over the Northern Pacific will move eastward to the Western Aleutians on Tuesday and 
Wednesday.  The associated pressure gradient will produce wind over 40 knots over the Western 
Aleutians which will meet the lower threshold for high wind during the warm season.  With the lower 
threshold for the warm season of 40 knots or greater met over the region and area of high winds is 
put over the Western Aleutians.  For some reason the area did not show up on the chart, this will 
be troubleshooted.    
 
Ziegenfelder