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Archives for the SPC Convective Outlook are updated daily (approximately) with a live map at the beginning of each article. Follow the link at the end of the article to check for current updates on the NOAA/NWS Storm Prediction Center website. Also, see Archives for Chicago's hourly weather data on CARDINAL NEWS Magazine.

Sunday, May 16, 2021

SPC May 16, 2021 1300 UTC Day 1 Convective Outlook

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0730 AM CDT Sun May 16 2021 Valid 161300Z - 171200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL AND SOUTHERN HIGH PLAINS... ...SUMMARY... Scattered strong/severe thunderstorms are once again expected across portions of the central and southern Plains late this afternoon and evening. Hail/wind are the greatest threats. ...

Central/Southern Plains... An upper trough is digging into the Desert Southwest today, with relatively weak westerly flow across the central and southern Plains states. Similar to yesterday, the greatest threat of strong/severe storms will be the activity that forms along the surface dryline from southeast CO into parts of northeast NM. Other strong storms may form farther north along a cold front over northeast CO and northwest KS. All of this activity will build eastward through the evening across the SLGT risk area. Forecast soundings throughout the risk area show relatively steep mid level lapse rates and sufficient CAPE for a risk of hail and gusty/damaging winds in the more organized storm clusters. However, vertical shear will be weak suggesting that convective organization will be limited. Several overnight model runs suggest storms building southeastward from TX Panhandle into southern OK/north TX after midnight. While this scenario is plausible, weak wind fields provide uncertainty whether storms can maintain severe wind potential late into tonight. Later outlooks will re-evaluate this area and potentially extend the SLGT risk farther eastward if warranted. ...

NV into northeast CO... As the upper trough moves into the southwest states today, a consensus of model solutions indicate an arcing band of showers and thunderstorms will develop from northeast NV into parts of UT/ID/WY/CO. Very steep low/mid level lapse rates and sufficient CAPE suggest a risk of isolated hail and gusty winds for a few hours this afternoon and early evening. ..Hart/Leitman.. 05/16/2021 Read more LIVE:

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