Wednesday, April 4, 2012

Itching to Double

4.4.12 - 30 min stairs - I'm itching to get out and run tonight but I have a speed workout planned for tomorrow and want fresh legs. No running yesterday because of the crazy weather. FWD now has the total at 16 tornadoes.




From the 4.4.12 AM AFD FWD

APRIL 3RD TORNADO OUTBREAK/
SURVEY TEAMS WILL BE HEADING OUT EARLY TO ASSESS THE DAMAGE THAT
OCCURRED ACROSS NORTH TEXAS YESTERDAY FROM THE TORNADIC
SUPERCELLS. APPROXIMATELY 11-13 AREAS OF DAMAGE HAVE BEEN REPORTED
AND WILL BE SURVEYED TODAY AND ON THURSDAY IF NEEDED. IT IS
UNKNOWN AT THIS TIME EXACTLY HOW MANY TORNADOES THERE WERE AND THE
SURVEY TEAMS TODAY WILL BE WORKING TO DETERMINE A MORE CONCRETE
NUMBER. INFORMATION ABOUT THE SURVEYS WILL BE DISSEMINATED
THROUGHOUT THE DAY THROUGH OUR WEBPAGE AND FACEBOOK PAGE AS THE
SURVEY TEAMS INVESTIGATE THE DAMAGE. A MORE COMPLETE WRITE-UP WILL
LIKELY NOT BE ISSUED UNTIL LATE THIS EVENING.

AT THIS TIME YESTERDAY...ALL EVIDENCE WAS SUGGESTING THE EVENT
WOULD BE A FAIRLY TYPICAL SPRING SEVERE WEATHER DAY ACROSS
NORTH TEXAS. IT WAS ANTICIPATED THAT A LINE OF SEVERE STORMS
WOULD FORM AROUND MIDDAY AND MOVE EAST ACROSS PART OF THE REGION.
THE POTENTIAL FOR TORNADOES WAS DISCUSSED BUT IT WAS THE MESOSCALE
FEATURES THAT PLAYED A SIGNIFICANT ROLE IN WHAT ENDED UP BEING AN
OUTBREAK ACROSS NORTH TEXAS. IT APPEARS AN OUTFLOW BOUNDARY FROM
STORMS OVER OKLAHOMA EARLY TUESDAY MORNING ENDED UP BEING A KEY
PLAYER IN ENHANCING THE TORNADO THREAT. THIS OUTFLOW BOUNDARY PUSHED
SOUTH ACROSS THE RED RIVER YESTERDAY MORNING AND REACHED THE
INTERSTATE 20 CORRIDOR BEFORE STALLING. DISCRETE SUPERCELLS MANAGED
TO FORM AHEAD OF THE DEVELOPING LINE OF STORMS. AS THESE SUPERCELLS
MOVED NORTH AND CROSSED THE OUTFLOW BOUNDARY...THEY ENTERED AN
ENVIRONMENT WITH INCREASED LOW LEVEL SHEAR DUE TO EASTERLY SURFACE
WINDS. IT WAS ALSO NOTED BY LOCAL REAL TIME MODELING THAT THE SURFACE
TO 3KM CAPE WAS VERY HIGH IN THE AREAS WHERE THE TORNADOES OCCURRED.
A LINK BETWEEN INCREASED LOW LEVEL CAPE AND TORNADOES HAS BEEN FOUND
IN PREVIOUS RESEARCH. MORE IN DEPTH STUDY AND ANALYSIS WILL LIKELY
BE DONE ON THIS DAY IN THE NEAR FUTURE. THIS WAS A GOOD EXAMPLE
OF HOW SMALL MESOSCALE FEATURES CAN QUICKLY CHANGE THE STORM
ENVIRONMENT ON ANY GIVEN DAY WHEN SEVERE WEATHER IS ANTICIPATED.
UNFORTUNATELY IT IS STILL VERY DIFFICULT IF NOT IMPOSSIBLE FOR THE
MODELS TO RESOLVE THESE SMALL MESOSCALE FEATURES...AND IT IS WHY WE
URGE EVERYONE TO PAY ATTENTION TO THE WEATHER ON DAYS WHEN SEVERE
WEATHER IS EXPECTED.

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