000
NOUS43 KDMX 091538
PNSDMX
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-100345-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1038 AM CDT THU MAY 9 2013

...ON THE CUSP OF STATEWIDE TORNADO CESSATION RECORD...

THE LAST TIME A TORNADO OCCURRED IN THE STATE OF IOWA WAS ON MAY
24TH 2012 IN FAYETTE COUNTY. AS OF THE END OF THE DAY ON
WEDNESDAY...IT HAD BEEN 349 DAYS SINCE THAT TORNADO OCCURRED. THE
RECORD LENGTH OF DAYS BETWEEN TORNADO OCCURRENCE IN THE STATE IS
355 DAYS SET BETWEEN THE DATES OF MAY 5 1955 AND APRIL 26 1956.
THEREFORE...WE ARE SET TO TIE THE RECORD ON TUESDAY MAY 14TH AND
BREAK IT ON THE 15TH. AT THIS TIME...THE SEVERE WEATHER THREAT
APPEARS MINIMAL THROUGH EARLY TUESDAY. HOWEVER...A FRONT WILL
APPROACH THE STATE LATE TUESDAY WITH AN INCREASING THREAT FOR
THUNDERSTORMS.

THIS STREAK IS RATHER IMPRESSIVE ON ITS OWN. HOWEVER...REPORTING
STANDARDS IN THE 1950S WERE NOT NEARLY AS ROBUST AND COMPREHENSIVE
AS THE PRESENT. DIGITAL TECHNOLOGY AND NEARLY UBIQUITOUS USE OF
CELL PHONES ALONG WITH EDUCATION...STORM CHASING...AND SPOTTER
NETWORKS OF TODAY AMONG OTHER THINGS HAVE FACILITATED THE
OBSERVING AND REPORTING OF TORNADOES. THEREFORE...THE LIKELIHOOD
OF HAVING A TORNADO OCCUR AND NOT BEING OBSERVED OR EVEN OBSERVED
BUT NOT REPORTED WAS MUCH GREATER IN THE 1950S THAN WHAT WOULD BE
EXPECTED TODAY WHICH MAKES THE CURRENT STREAK STAND OUT EVEN MORE.

$$

COGIL

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