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Back to the main event page for June 3-4, 2008

June 3-4, 2008
Event #3 -- Wednesday Morning


The supercell thunderstorms from Tuesday night gradually congealed into a broken area of persistent, training thunderstorms. Flash flooding became an issue overnight, mainly in the Miami and Whitewater Valley regions. One thunderstorm briefly became severe just before 3 AM north of Dayton.

Eventually, another intense squall line developed out of this region of storms over Illinois. It continued east through Indiana, and finally strengthened as it entered Ohio at around 7 AM. The line of storms carved another swath of wind damage across the eastern Cincinnati metro area, and locations east from there. In addition, a brief tornado touched down in Newtown (eastern Hamilton County). There were numerous reports of marginally severe hail as well. Flash flooding also became an issue in the Tri-State region and further east, as heavy rain continued to fall over areas which had already experienced plenty.

Click the image thumbnails to see the images in full-size (960x910).




At 7:48 AM, reflectivity data (left) showed the line of thunderstorms as it lined up roughly across the Interstate 71 corridor. Velocity data (right) indicated a few areas of strong inbound winds (green) associated with the line. The wind shift along the gust front from outbound (red) to inbound is very evident in Greene and Madison Counties.




This frame at 7:44 AM shows the end of the squall line in eastern Hamilton County, just before the Newtown tornado touched down. A "hook" or "notch" is evident in the reflectivity data (left). Storm relative motion data (right) does indicate some weak rotation at the same time, with inbound winds (green) lining up in a couplet with outbound winds (red).




At about 8:05 AM, wind damage occurred near Westboro in southern Clinton County. The damage appeared to be associated with a small break in the squall line, as evident in the reflectivity data (left). Storm relative motion data (right) shows a slight "twist" in the leading edge of the line of storms. This small meso-vortex enhanced the straight line winds in the area, with damage observed near the outward-bowing "wave" in the line. Note that this data does not indicate a strong "gate-to-gate" couplet that one would expect to see as indication of a tornado.



Preliminary Local Storm Report
..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0627 AM     FLOOD            2 NNE OSTRANDER         40.29N 83.20W 
06/04/2008                   DELAWARE           OH   PUBLIC          

            STREAMS WERE COMING OUT OF THEIR BANKS.

0743 AM     HAIL             3 SSW BLUE ASH          39.21N 84.40W 
06/04/2008  U0.75 INCH       HAMILTON           OH   PUBLIC          

0748 AM     TORNADO          NEWTOWN                 39.12N 84.35W 
06/04/2008                   HAMILTON           OH   NWS STORM SURVEY

            SIGNIFICANT TREE DAMAGE REPORTED IN NEWTOWN...WITH SOME 
            STRUCTURAL DAMAGE AS WELL TO A NURSERY AND OTHER 
            BUSINESSES. A BROKEN DAMAGE PATH OF 1.5 MILES EXTENDED 
            THROUGH THE AREA. THE TORNADO HAS BEEN RATED AN EF0 ON 
            THE ENHANCED FUJITA SCALE WITH WIND SPEEDS ESTIMATED 
            BETWEEN 70 AND 75 MPH.

0748 AM     TSTM WND DMG     3 S MADEIRA             39.14N 84.37W 
06/04/2008                   HAMILTON           OH   TRAINED SPOTTER 

            NUMEROUS TREE LIMBS DOWNED...UP TO 20-40 FEET IN LENGTH 
            AND ONE FOOT IN DIAMETER. NUMEROUS SMALL TREES AND POWER 
            LINES DOWNED.

0750 AM     HAIL             CINCINNATI              39.14N 84.51W 
06/04/2008  E0.88 INCH       HAMILTON           OH   PUBLIC          

0756 AM     HAIL             3 ESE CINCINNATI        39.12N 84.45W 
06/04/2008  E0.75 INCH       HAMILTON           OH   NWS EMPLOYEE    

0756 AM     HAIL             5 WSW FAYETTEVILLE      39.15N 84.01W 
06/04/2008  U0.88 INCH       CLERMONT           OH   PUBLIC          

0758 AM     HAIL             5 SW FAYETTEVILLE       39.14N 84.00W 
06/04/2008  E0.88 INCH       CLERMONT           OH   PUBLIC          

0801 AM     TSTM WND DMG     MIDLAND                 39.31N 83.91W 
06/04/2008                   CLINTON            OH   TRAINED SPOTTER 

            MANY TREES DOWNED DUE TO HIGH WINDS...WITH SOME FALLING 
            ON BUILDINGS AND CAUSING STRUCTURAL DAMAGE.

0808 AM     TSTM WND DMG     WESTBORO                39.28N 83.91W 
06/04/2008                   CLINTON            OH   NWS STORM SURVEY

            NUMEROUS TREES DOWNED...WITH A FEW HOMES SUSTAINING MINOR
            ROOF AND SIDING DAMAGE. STRAIGHT-LINE WINDS WERE SURVEYED
            TO BE THE CAUSE...ESTIMATED AT AROUND 60 MPH.

0852 AM     TSTM WND DMG     CHILLICOTHE             39.34N 82.99W 
06/04/2008                   ROSS               OH   LAW ENFORCEMENT 

            LARGE LIMBS DOWN ACROSS ROADS.

0900 AM     FLASH FLOOD      BROOKVILLE              39.42N 85.01W 
06/04/2008                   FRANKLIN           IN   LAW ENFORCEMENT 

            AT LEAST 8 ROADS ACROSS THE COUNTY WITH WATER RUNNING 
            ACROSS THEM.

0900 AM     FLASH FLOOD      MANCHESTER              39.15N 85.01W 
06/04/2008                   DEARBORN           IN   LAW ENFORCEMENT 

            AT LEAST 5 COUNTY ROADS WITH HIGH WATER RUNNING ACROSS 
            THEM.

0900 AM     FLASH FLOOD      CINCINNATI              39.14N 84.51W 
06/04/2008                   HAMILTON           OH   LAW ENFORCEMENT 

            SEVERAL MAJOR INTERCHANGES THROUGH CITY WITH VERY HIGH 
            WATER. 

0958 AM     TSTM WND DMG     LOGAN                   39.54N 82.40W 
06/04/2008                   HOCKING            OH   PUBLIC          

            TREES WERE BLOWN DOWN.

1000 AM     FLASH FLOOD      2 E OXFORD              39.51N 84.71W 
06/04/2008                   BUTLER             OH   LAW ENFORCEMENT 

            NUMEROUS ROADS WITH VERY HIGH WATER. A HANDFUL OF 
            RESIDENTS EVACUATED NEAR CANAL ROAD IN ST. CLAIR 
            TOWNSHIP.

1000 AM     FLASH FLOOD      INDEPENDENCE            38.95N 84.55W 
06/04/2008                   KENTON             KY   LAW ENFORCEMENT 

            2 ROADS CLOSED DUE TO HIGH WATER

1050 AM     TSTM WND DMG     WHEELERSBURG            38.73N 82.85W 
06/04/2008                   SCIOTO             OH   EMERGENCY MNGR  

            TREES WERE BLOWN DOWN.

$$

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