A low pressure system and warm front parked over the northern part of the country will allow the heat to remain in place from the Central and Southern Plains to the East coast for the next few days. Relief starts to move in for portions of the Middle Mississippi River Valley to the Mid Atlantic late this week and into the weekend as cold front slowly works south.
The heat dome is in place from the central and southern plains to the East Coast today. Temperatures in the 90’s combined with dew points in the 70’s will allow for heat index values to soar into the 100’s by this afternoon from Kansas, Oklahoma, New Mexico, and Texas east to the Carolina’s.
With these high heat index values, the National Weather Service has issued heat advisories for a parts of Kansas, Missouri, Oklahoma, New Mexico, Texas, Arkansas, Tennessee, Louisiana and Mississippi.
A second area of heat advisories is in effect for the Carolina Coasts, while another area is in effect for New York City.
An Excessive Heat Warning is in effect for parts of Northeast Oklahoma where heat index values will top110° F this afternoon. Another area with an Excessive Heat Warning is effect for the Philadelphia area for heat index values of around 100°F. The criterial is lower in several northern cities because people are less acclimated to the heat and fewer buildings and homes have air conditioning.
Thursday and Friday Heat
The hot and humid air will remain in place for Tomorrow with many of the same areas experiencing heat index values in the 100’s.
A cold front will bring some relief to parts of the Central Plains and Mid-Mississippi River Valley on Friday as it slowly moves south. Ahead of the front, heat index values will still be in the 100’s, while behind the front heat index values will be in the lower and middle 90’s.
Human Heat Impacts
If you must be outside in the afternoon, drink plenty of fluids. Limit the intake of carbonated beverages and alcohol. Take frequent breaks and if you do start to feel the signs of heat stress or stroke which include heavy sweating, fatigue, low blood pressure, dizziness and muscle cramps, seek medical help. The Mayo clinic has more information on heat exhaustion.
Livestock Impacts of Heat
Our animals will also fell the stress of the heat especially in since overnight lows will only drop into the middle and upper 70’s for tonight and Thursday Night. The Oklahoma Mesonet Cattle Stress index shows much of Oklahoma is in the Heat Danger Categories for today (Wednesday).
With similar temperature and relative humidity conditions in Texas, Kansas, Arkansas and Louisiana, livestock in these areas are likely experiencing similar stress levels. In additon with morning clouds in eastern Kansas and Oklahoma quickly moving east, moderate to full levels of solar radiation are expected this afternoon
Livestock owners are encouraged to check on their cattle and other animals today and ensure that they have fresh and if possible cool water and ensure that they can find shade. If livestock are in pens/close proximity provide fans to increase circulation and for dairy operators ensure that your misting systems are working In addition, if possible delay feeding until this evening/tonight during the cooler part of the day.
The Missouri Extension office has more tips on how to help cattle manage the heat.
The team at WxIntegrations will continue to provide relevant information and resources to help you better understand and prepare by incorporating weather impacts into your planning and response.