Sacramento Tornadoes
~2200 UTC 21 February 2005

Two Tornadic Storms in Northern Portions of Sacramento Metro Area: Possible Supercells*

Website Updated 3/24/05

Webpage and Meteorological Analysis (When it Appears): by John Monteverdi, SFSU with help from Greg Stumpf, NSSL

Email: montever@sfsu.edu

(Please note-- Picture Attributions Will be Placed Here.
I am putting these pictures up in the interest of the scientific curiosity. Pictures
appeared originally in Sacramento Bee)

*Note: Much of the storm structure associated with both the Southport-to-Woodland and Natomas tornadic storms seems supercellular . However, the meteorology on this day suggests that the storms would be low-topped. An analysis of the radar data might substantiate this and COULD also substantiate that the tornadoes formed from descending mesocyclones (although sometimes this is difficult to prove for low-topped storms distant from the radar since the lowest angle tilt could overshoot the lowest 5000 feet of the echo if the storm is only 30 miles distant). On the other hand, supercells can intercept low level vorticity and tilt/stretch it to form non-supercell tornadoes too. I am working with Greg Stumpf of the NSSL on resolving these issues.

Page 1  |  Page 2 (Including Some Weather Maps)
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Natomas Storm: View shows bell shaped lowering, with tornado on occluded portion (RFD between). This picture pretty diagnostically indicates that the storm was a supercell just north of Sacramento Executive Airport (Matthew Adams)

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Natomas Storm: (Francisco X Daniel)

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Natomas Storm: (William Tunick)

Large Tornado associated with Southport-to-Woodland storm.

Attribution Coming for Images to Right and Left

Natomas Storm:

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Natomas Storm: In this picture, there are apparent low to midlevel inflow bands and a "beaver" inflow tail, also suggesting a supercell. (Antonio Morabito)

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Natomas Storm: Walt Bromby

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Natomas Storm: Ricky Hunter

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Natomas Storm: Similar to the picture above, with inflow bands. (Kathy Rokusek)

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South Notomas

(Mark Lawton)

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Great shot showing forming tornado with RFD slot, on wall cloud base curving
back to inflow tail.

(Laurence Kerckhoff)

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This is an excellent view of what appears to be a supercell tornado in Southport-to-Woodland storm. (Rob Cernohlavek)

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Natomas Storm: Andrew Fullerton and Kathleen Klein

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Natomas Storm: (Nirmal Sandhar)

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Stuart Hooper

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Kathleen Klein

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Tina Meagher

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Natomas Storm: Steve Hope

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Natomas Storm: Clark Crebar

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Natomas Storm: Lucas Perretti

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Great shot of debris in North Natomas.

Ritesh Patel

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Natomas Storm: Peter Folks

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Natomas Storm: Peter Folks

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Natomas Storm: Brian and Pam Viray

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Natomas Storm: Will Soszka

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Natomas Storm: Michael Butler

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Natomas Storm: Russ Heimerich

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Natomas Storm: Craig and Peggy Seher

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Natomas Storm: Phil and Laura Cox

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Natomas Storm: Robert Tassinari

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Natomas Storm: Brenda Smith