US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
404 PM EDT Tue Jun 25 2019
 
Valid Friday June 28 2019 - Tuesday July 02 2019
 
Hazards:
- Flooding possible across portions of the Central Plains and the Middle Mississippi Valley.
- Flooding occurring or imminent across portions of the Central/Southern Plains, the Middle/Lower 
Mississippi Valley, and the Ohio Valley.
- Flooding likely across portions of the Central Plains and the Middle Mississippi Valley.
 
Detailed Summary:

The medium-range period will appear to be relatively quiet in terms of hazardous weather across the 
U.S. Although the upper-level pattern continues to favor a trough over the Western U.S., a ridge of 
high pressure that is forecast to strengthen over the central part of the country will limit the 
chance of heavy rain and thunderstorms over areas where rainfall amounts have been well above 
normal since this spring.  Nevertheless, models have been indicating that an inverted 
trough/easterly wave would form underneath the building ridge and then moves from east to west 
across Florida into the Western Gulf State.  Rainfall amounts associated with this feature are not 
excessive thus far according to global models.  Nevertheless, localized heavy rainfall cannot be 
ruled out should a surface low pressure center develops.  With the building ridge over the 
Mississippi Valley and the Plains, maximum temperatures will be 12 degrees above normal over parts 
of the Northern/Central High Plains on Friday with the temperature anomalies moving into the 
Northern Plains/Upper Mississippi Valley on Saturday then decreasing to about 10 degrees on Sunday 
and even lower on Monday and Tuesday.  With the temperature anomaly moving eastward then decreasing 
no area of above normal temperatures is depicted on the hazards map. 

Over the Northern Plains, a low pressure system is forecast to develop on Friday in West-Central 
Canada and move eastward to James Bay by Tuesday.  The trailing front will linger over the Northern 
Plains into the Upper Great Lakes will aid in producing showers and thunderstorms over the region 
Friday into Tuesday.   

No hazardous weather is anticipated for Alaska through the medium-range period.

Ziegenfelder