Weather Alerts For Rock Hill, MO

There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS PORTIONS OF THE UPPER MISSISSIPPI VALLEY INTO THE GREAT LAKES...ACROSS PORTIONS OF THE PLAINS...AND ACROSS PARTS OF THE NORTHERN AND CENTRAL HIGH PLAINS SUMMARY Thunderstorms with severe wind gusts and isolated large hail will be possible this afternoon and evening from the central Plains into the lower Missouri Valley, as well as the Upper Midwest. Other storms capable of severe wind gusts and hail will also be possible from the Northern Rockies into the central High Plains this afternoon into tonight. 20z Update The primary adjustment for this update was the introduction of additional 15% wind probabilities across southern Montana into northern Wyoming and far western South Dakota. Latest GOES imagery and lightning trends show deepening convection within the higher terrain of southern to central MT. An approaching shortwave trough will promote additional ascent and east/southeastward propagation off the terrain through late afternoon and early evening. As this occurs, thunderstorms will spread into a warm and deeply-mixed environment featuring 0-3 km lapse rates on the order of 8-9 C/km and sufficient buoyancy to sustain convection. Given this favorable thermodynamic profile and ample shear across the region (sampled by 18 UTC RAOBs from RIW and UNR), the potential for severe winds appears higher than previously anticipated. Recent HRRR/RRFS time-lagged ensemble guidance appears to be capturing this trend and depicts higher severe wind potential than earlier solutions. Southeast Wyoming into Colorado and Nebraska The early stages of deepening convection is noted near the Casper, WY area ahead of a weak mid-level disturbance and where daytime heating has resulted in surface temperatures climbing into the low 80s. While this initial activity will likely remain sub-severe, the potential for intensification should steadily increase as it spreads southeast into a more moist air mass. Similarly, cumulus is noted across north-central CO on the western fringe of the higher-quality moisture. Guidance continues to show considerable spread regarding convective coverage and evolution across both regions, but given these observed trends and a fairly supportive environment downstream of emerging convection, expanding hail and wind risk probabilities appeared prudent. Northeast Kansas/western Missouri Latest guidance continues to show additional thunderstorm development later tonight within a warm advection regime across northeast KS into west/northwest MO. However, there has been a notable northward trend in recent HRRR/RRFS solutions compared to 12z guidance. 15% hail and wind probabilities have been adjusted northward to account for this trend.

Pollen Index: 9.5 Pollen Level: medium-high Predominant Pollen: Ragweed, Chenopods and Nettle. The pollen levels for Wednesday will be falling in the moderate range. The cause for the falling pollen levels is falling temperatures, rising humidity, and expected precipitation in the morning and afternoon which tends to wash pollen out of the air. This will improve your outlook if you have allergies and enjoy the out of doors.