Weather Alerts For Champaign, IL

There is a Slight 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 FROM PARTS OF ILLINOIS TO THE MID-ATLANTIC COAST...OVER PARTS OF THE NORTHERN AND CENTRAL PLAINS...AND OVER SOUTHERN ARIZONA SUMMARY Thunderstorms with severe wind gusts will be possible this afternoon and evening from northern Illinois eastward into Pennsylvania. Severe gusts and hail will also be possible from parts of the central and northern Plains into the Midwest, with scattered severe storms over southern Arizona. PA/NY/NJ Multiple clusters and lines of thunderstorms are ongoing this morning from western PA. So far, this activity has produced limited severe wind gusts due to weak low-level lapse rates. However, continued heating over central/eastern PA will eventually allow the storms to be more efficient wind-producers with locally damaging gusts expected. See MD #1894 for further details. OH/WV A secondary cluster of storms over central OH is tracking southeastward in a moderately sheared environment. Rapid heating is occurring to the southwest of this cluster, which should result in intensification by mid afternoon. Storms will likely spread into northern WV with a risk of damaging wind gusts and perhaps hail. SD/MN/IA A large reservoir of unstable air will reside across much of SD today, with MLCAPE values over 3000 J/kg, steep lapse rates, and dewpoints in the upper 60s. A capping inversion should preclude sustained convection until after 00z when strengthening southerly low-level flow and warm advection will aid initiation. Supercells capable of large hail and damaging winds are expected, with eventual upscale organization into a bowing MCS possible through the evening/night. CO/KS Most model guidance shows the likelihood of scattered high-based thunderstorm development late this afternoon over northeast CO, spreading into northwest KS and southwest NE this evening. Cloud cover is somewhat limiting heating, but sufficient CAPE and winds aloft may promote a period of damaging wind potential later today. AZ Another round of evening thunderstorms is expected to initiate off the higher terrain of east-central AZ and spread westward toward the TUS/PHX metro areas. Parameters remain conditionally favorable for damaging winds in any sustained/organized clusters of storms that may develop.

Pollen Index: 9.2 Pollen Level: medium-high Predominant Pollen: Grass, Nettle and Chenopods. The amount of pollen in the air for Tuesday will be falling but will remain in the high range. This change results in part from falling temperatures, lack of strong winds and expected precipitation in the morning and afternoon which tends to wash pollen out of the air.