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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.

Saturday, October 30, 2021

SPC Oct 30, 2021 2000 UTC Day 1 Convective Outlook

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0234 PM CDT Sat Oct 30 2021 Valid 302000Z - 311200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS EASTERN MA THROUGH THIS EVENING... ...SUMMARY... Thunderstorms with gusty winds may affect eastern Massachusetts through early evening. ...20z Update... The previous forecast remains on track and no changes are needed with the 20z update. Forecast guidance continues to indicate a small window of opportunity through early evening for a few strong thunderstorms to develop. Strong wind gusts will be the main hazard with this activity. ..Leitman.. 10/30/2021 .PREV DISCUSSION... /ISSUED 1112 AM CDT Sat Oct 30 2021/ ...New England... A vigorous shortwave trough is currently along the Carolina coast. This system will track northward, with an associated deepening surface low approaching the coast of southeast New England later this afternoon and early evening. It currently appears the low will move into RI or eastern MA, with very strong southeasterly low-level winds in the warm sector over Cape Cod. This may be coincident with a cluster of thunderstorms indicated by several CAM solutions. Forecast soundings suggest the near-ground stable layer will be rather shallow, with the potential for isolated strong/severe gusts in the most organized cells. It appears this threat will primarily be during the 21-03z period. Read more LIVE: