SMHI is reviewing its decision to issue only yellow warnings for the recent severe weather in Västernorrland, which caused significant damage. The investigation will assess whether the warnings were adequate given the impact, including derailed trains and flooded areas.
SMHI Investigates Weather Warnings After Severe Storms
SMHI Investigates Weather Warnings After Severe Storms
SMHI issued only yellow warnings—the lowest level—before the weekend's severe weather that hit Västernorrland hard. Now, an investigation is underway to determine if this was appropriate.
Before the storm, SMHI issued yellow warnings, which are the lowest on the three-tier scale. This level warns of potential societal consequences, while the next level—orange—indicates serious consequences, and the highest—red—signals very serious societal impacts.
"Persistent and Intense"
On Sunday, two freight trains derailed, dozens of roads were damaged or destroyed, and basements were flooded. An important public announcement (VMA) was issued. Were SMHI's yellow warnings sufficient?
– This is being investigated. Meteorologists working on warnings are currently reviewing how much rain fell, the resulting consequences, and how accurate the warnings were, says Magnus Nilsson Sangrud.
The storm was caused by a low-pressure system with heavy showers.
– It was persistent in the same area, says Nilsson Sangrud.
"Local Variations"
The highest recorded rainfall at SMHI's weather stations was in Aspeå, west of Örnsköldsvik, which received 72 millimeters. Typically, 70–80 millimeters fall throughout September.
There are also local reports of rainfall exceeding 100 millimeters in some areas.
– It has been a situation with intense thunderstorms and significant local variations. It is entirely possible that more rain fell in other areas, says Linus Karlsson, meteorologist at SMHI.