LONG ISLAND TORNADO

On the morning of July 18, 2007, a Warm Front was just south of Long Island and an Upper Air Disturbance was to the NW heading SE. This set the stage for heavy rain and thunderstorms. At 8:45 AM, the NWS issued a Severe Thunderstorm Warning for Suffolk County and a Flash Flood Warning.

Thunderstorm Warning
8:49 AM EDT
Wed Jul 18 2007

The National Weather Service in Upton NY has issued a
* Severe Thunderstorm Warning for...
southern Nassau County in southeast New York...
southwestern Suffolk County in southeast New York...
* until 930 am EDT...
* at 845 am EDT...National Weather Service Doppler radar indicated a severe thunderstorm capable of producing damaging winds in excess of 60 mph. This storm was located near Massapequa...and moving east at 30 mph.
* The severe thunderstorm will be near...
Babylon by 855 AM...
Deer Park by 900 AM...
Bay Shore and Brentwood by 905 AM...
Islip by 910 AM...
Sayville and Ronkonkoma by 920 AM...
Patchogue and Holbrook by 925 AM...

Flood Warning
8:46 AM EDT
Wed Jul 18 2007

The National Weather Service in Upton NY has issued a
* Flash Flood Warning for...
western Suffolk County in southeast New York...
* until 1045 am EDT...
* at 845 am EDT...National Weather Service Doppler radar indicated flash flooding from a complex of thunderstorms
over western Suffolk County...moving east at 15 mph.
* Other locations in the warning include but are not limited to
Deer Park...Dix Hills...Bay Shore...Commack...Brentwood...
Islip... Hauppauge...Smithtown...Ronkonkoma...Sayville...
Holbrook...Stony Brook...Centereach...Patchogue...Farmingville...
Medford...Coram... Mount Sinai...Yaphank...Middle Island...
Shirley and Rocky Point
Additional rainfall amounts of 1 to 2 inches are possible in the warned area.

Then this!!!
Tornado Warning
9:19 AM EDT Wed
Jul 18 2007

The National Weather Service in Upton NY has issued a
* Tornado Warning for... southwest Suffolk County in southeast New York...
* until 945 am EDT...
* at 916 am EDT...National Weather Service Doppler radar indicated a severe thunderstorm capable of producing a tornado near Sayville...or about near Islip...moving northeast at 10 mph.
* The tornado will be near...
Sayville and Ronkonkoma by 940 am...
Holbrook by 945 am...

There was in fact a tornado. An EF-1 touched down about 2 miles NE of my house in Islip. While there was a great deal of tree damage, I didn't see any homes with any serious damage. I know of 2 cars that were damaged, but luckily nobody was hurt.

Here's pictures leading up to the tornado.

Rainfall Totals
Nassau County...

Garden City 5.18
Carle Place 3.44
Farmingdale 3.02
Muttontown 2.84

Suffolk County...

Holtsville 4.20
East Quogue 4.02
Upton 3.92
Islip 3.34

Click to Enlarge
Rainfall Total Map
Radar 9:16 AM

2 hours after the rain ended
there was still water around

Tornado Damage Pictures