...Severe Storms Bring Wind and Hail to the Region...


A slow moving frontal boundary, combined with a high degree of instability caused numerous showers and thunderstorms to erupt across portions of eastern Kansas and west central Missouri during the late afternoon hours and evening hours of Saturday, July 14, 2007.  Several hail reports ranging in size from nickels to quarters were reported to the office in many locations.  Near Linneus, quarter size hail along with strong damaging winds blew down many 4 to 6 inch diameter tree limbs when storms rolled through around 7 pm.  Another severe storm slowly crawled through portions of Livingston and Davies counties later on in the evening.  These storms produced additional reports of quarter size hail and winds greater than 60 mph near the communities of Chula and Lock Springs.  A complete listing of storm reports can be found at the bottom of this page.

However, one of the strongest storms of the evening raced southward along areas of the Missouri River from St. Joseph to the northern portions of the Kansas City metropolitan areas.  In fact, as the strongest portions of the storm passed overhead of the Kansas City International airport, local observations taken during the storms passage indicated a temperature drop of nearly 26 degrees as the storm passed!  In addition, the automated observation equipment at the airport observed a peak wind gust of 62 mph.  This storm continued to roll southward and into areas of North Kansas City, producing nickel to quarter size hail and wind gusts above 50-60 mph in many locations.  Below you will find a meteogram of surface observations taken from the Kansas City International airport as this severe thunderstorm moved through.  Make sure to note the abrupt drop in temperatures following the storm passage. 



Click on Image for Larger Version
Meteogram from Kansas City International During Passage of Storm





























From a radar perspective, one can see the very strong winds heading towards the radar during the peak gusts at the Kansas City International airport.  Below you will find both velocity and reflectivity from the 0.5 degree tilt of the radar (or about 2700 feet off the ground at that point).  Note the very strong winds of about 53 knots indicated by the white colors just south of Platte City.

Click on Image for Larger Version Click on Image for Larger Version
0.5 Degree Velocity Image 0.5 Degree Reflectivity Image


























Yet another radar perspective of this storm that forecasters use can be attained by looking at multiple levels of the storm at the same time.  Below you will find a four panel layout of velocity and reflectivity of the MCI storm at 0.5, 1.5, 2.4, and 3.4 degrees. Make sure to note the very high concentrated reflectivity values of 60 dbz well above 10000 ft in the atmosphere.

Click on Image for Larger Version Click on Image for Larger Version
Four Panel Velocity Image Four Panel Reflectivity Image














 


 




Local Storm Reports



PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1104 PM CDT SAT JUL 14 2007

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..


0548 PM HAIL 6 NW GALT 40.19N 93.47W
07/14/2007 E0.75 INCH GRUNDY MO TRAINED SPOTTER


0657 PM HAIL 3 N LINNEUS 39.92N 93.19W
07/14/2007 E1.00 INCH LINN MO TRAINED SPOTTER


0700 PM TORNADO ELWOOD 39.75N 94.88W
07/14/2007 BUCHANAN KS LAW ENFORCEMENT

OFFICER REPORTED A BRIEF TOUCHDOWN THEN FUNNEL
DISSIPATED.

0715 PM TSTM WND DMG 3 E LINNEUS 39.88N 93.13W
07/14/2007 LINN MO TRAINED SPOTTER

4 TO 6 INCH DIAMETER TREE BRANCHES DOWN ON ROUTE P

0716 PM HAIL LINNEUS 39.88N 93.19W
07/14/2007 E0.75 INCH LINN MO TRAINED SPOTTER

0755 PM TSTM WND DMG PLATTE CITY 39.36N 94.78W
07/14/2007 PLATTE MO TRAINED SPOTTER

SEVERAL SHINGLES BLOWN OFF...ESTIMATING 68 MPH
WIND...0.88 INCH HAIL

0758 PM TSTM WND GST 5 S PLATTE CITY 39.29N 94.78W
07/14/2007 M62.00 MPH PLATTE MO ASOS

MCI ASOS REPORT

0812 PM HAIL NORTH KANSAS CITY 39.14N 94.56W
07/14/2007 E0.75 INCH CLAY MO LAW ENFORCEMENT

I-29 AND 72ND STREET

0813 PM TSTM WND GST 10 WNW PURDIN 40.01N 93.34W
07/14/2007 E70.00 MPH LINN MO TRAINED SPOTTER

NEAR LINN AND GRUNDY COUNTY LINE...ESTIMATE MAY BE A
LITTLE HIGH...RELAYED REPORT.

0820 PM TSTM WND GST 4 E CHULA 39.92N 93.40W
07/14/2007 E65.00 MPH LIVINGSTON MO TRAINED SPOTTER

273RD AND KK HIGHWAY

0855 PM HAIL 10 NW CHILLICOTHE 39.89N 93.69W
07/14/2007 E1.00 INCH LIVINGSTON MO TRAINED SPOTTER

ALSO ESTIMATED 50 MPH WINDS

0910 PM HAIL LOCK SPRINGS 39.85N 93.78W
07/14/2007 E1.00 INCH DAVIESS MO TRAINED SPOTTER


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.