US Day 3-7 Hazards Outlook
NWS Weather Prediction Center College Park MD
214 PM EDT Wed Jun 12 2019
 
Valid Saturday June 15 2019 - Wednesday June 19 2019
 
Hazards:
- Heavy rain from portions of the south-central Plains to the Ohio Valley, Sat-Tue, Jun 15-Jun 18.
- Flooding occurring or imminent across portions of the Mississippi and Missouri River Basins, and 
South Carolina.
- Flooding likely across portions of the Northern and Central Great Basin, and the Central Plains.
- Excessive heat across portions of south Texas, Sat-Wed, Jun 15-Jun 19.
- Much above normal temperatures across portions of the Northern Great Basin, Sat-Sun, Jun 15-Jun 
16.
 
Detailed Summary:

Another heavy rainfall threat is possible from parts of the central-southern Plains through the 
Ohio Valley along a slow moving or stalled frontal boundary towards the end of this weekend and 
into early next week. The most likely region for significant and widespread 1-4+ inches is from 
eastern Oklahoma/southeast Kansas to Ohio and far western Pennsylvania and this is the area 
highlighted on the hazards chart today. Slight expansion northward of the heavy rain area from 
yesterday just based on the latest forecast. Areas within this region, particularly across the 
Mississippi/Missouri River Basins, have had much above normal rainfall over the past few weeks and 
remain sensitive to additional rainfall. Isolated significant amounts may also extend into the 
Mid-Atlantic/Northeast but confidence on this is still low and so an area was left off the hazards 
chart for today.

Record heat in the short term across the West will subside by the medium range period. Above 
average temperatures continue to be likely during the first part of the medium range period, but 
not nearly as high as in the short range period and mostly below hazard criteria. Did maintain an 
area in the Columbia Basin of eastern Washington where anomalies near +10F to +12F are possible 
Saturday and Sunday. Meanwhile, excessive heat with daytime highs near or above 100F and even 
higher heat indices are possible across parts of South Texas Saturday through Tuesday. An excessive 
heat area was continued on today's hazards chart for areas where heat indices are forecast to be 
above 105F.

In Alaska, an upper level low centered just south of the eastern Aleutians on Saturday will drift 
eastward through the Gulf of Alaska early next week. This may bring a period of unsettled weather 
to parts of the eastern Aleutians, southern mainland coast, and Panhandle with the potential for 
gusty winds and moderate to locally heavy rainfall. At this time, the threats appear to stay below 
hazards chart criteria so no areas are indicated on today's chart, but this system may need to be 
monitored in the coming days for updates to the forecast.

Santorelli