Thursday, June 17, 2010

Tornado Touchdowns Far West Metro

Doppler Update: 7:02 pm. Confirmed reports of tornado touchdowns near Buffalo and Winsted. Strong/severe storms moving through the metro area between now and 9 pm - the most violent "supercell" thunderstorms will probably pass to the south of the metro - but another isolated tornado can't be ruled out for the Twin Cities region. Stay alert - be ready to move to a basement, under the stairs the safest place to ride out a tornado. No basement? Go to a small room, a closet or bathroom. People have survived F-5 tornadoes in their bathtubs. Avoid outer walls, windows, mobile homes, large rooms or auditoriums. You don't want to be in a car either - if you can't drive to safety get out and seek shelter in a ditch.

3 Supercells. Latest Doppler (7 pm) shows storm relative velocity - the circled regions show where the atmosphere is spinning like a crazy top - it's these supercell T-storms that are most likely to produce tornadoes in the coming hours. The most severe rotation is taking place near Albert Lea, which (hopefully) will not suffer a direct strike - but it's going to be a very close call. the most severe storms seem to be sliding off south of the Twin Cities metro.

Large, Violent Tornado near Albert Lea: Reports of a half-mile wide tornado near Kiester, in Faribault Co, near Albert Lea. Confirmation of a tornado on the ground, a very dangerous scenario for people in the Albert Lea area. I've circled the velocity "couplet" in blue, highlighting the area of most intense spin in the atmosphere.

Doppler Update: 6:35 pm. Strong/severe storms just west of the metro, heavy weather currently in the Mankato area will be drifting up over the metro area between now and 8 pm, a tiny percentage capable of large hail, damaging winds and even a stray tornado.

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