A weak upper level low affected the area on July 17th. This aided in the development of numerous thunderstorms during the afternoon hours, several of which became severe.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS TAE wrote it up.
A weak upper level low affected the area on July 17th. This aided in the development of numerous thunderstorms during the afternoon hours, several of which became severe.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tallahassee, FL wrote its last area forecast discussion before the first event at Jul 17, 8:47 AM CST, 3 hours 54 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TALLAHASSEE FL 1047 AM EDT Tue Jul 17 2012 .DISUCUSSION... Vapor imagery and upper air data showed a TUTT cell situated over north FL, and a weak vorticity max propagating southwestward over central AL. The Tutt low appears to be the most significant feature, as it impacting the mid to upper tropospheric winds and moisture profile over our region. While it's possible these two features could generate some pockets of weak vertical motion today, the primary focus for deep moist convection will likely come from sea breeze fronts and outflow boundaries. The CAM NWP guidance consensus generates most of the convection late this afternoon across south central GA and north FL, where there will likely be the greatest amount of SBCAPE, deep layer moisture, and vertical motion from colliding east coast and west coast sea breeze fronts. The CAM NWP guidance then takes these loosely-organized storms westward across much of the remainder of our forecast area early this evening. Of course there will be thunderstorm development elsewhere today as well, but this activity may be more isolated. It is yet unclear as to how the aforementioned AL vort max and associated upper level clouds will impact today's convective development. The latest consensus of statistical and CAM NWP guidance suggests that today's PoP is about 60%, which a slight reduction from the previous forecast. This is perhaps due to the fact that Precip Water values are at average levels (as opposed to above- average), and the apparent lack of significant large scale ascent. Either way, 60% is still above our climatological PoP. With the K Index being so high, we expect today's storms to be prolific lightning producers, which will be the main threat to most people today. A secondary threat will be isolated strong to severe storms. The CAM NWP guidance simulates several strong updrafts today, and the SPC has our forecast area outlooked in a 5% chance of severe storms (within 25 miles of a point). Wind gusts of 40 to 60 MPH and pea to quarter size hail will be possible. Although we expect today's storms to have enough steering flow to avoid stalling, they are likely to have very high rain rates, and localized rain amounts of 2 to 4 inches in a relatively short time are possible. This could cause flooding of low lying and poor drainage areas, especially in these storms develop over a city. && .AVIATION... Numerous thunderstorms are expected this afternoon and evening, which will cause temporary reduction to IFR vis and/or cigs, along with very high lightning rates. Wind gusts to 35 KT are possible with the stronger storms. Generally VFR conditions are expected outside of these storms, even through tonight. Winds will be rather variable less than 10 KT today, except for a 5 to 10 KT onshore sea breeze this afternoon at KECP. && .TAE WATCHES/WARNINGS/ADVISORIES... AL...None. GA...None. FL...None. GM...None. && Fournier
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TALLAHASSEE FL 1020 AM EDT TUE JUL 17 2012 ALZ065>069-FLZ007>019-026>029-034-108-112-114-115-118-127-128-134- GAZ120>131-142>148-155>161-GMZ730-750-755-765-770-775-181430- COFFEE-DALE-HENRY-GENEVA-HOUSTON-INLAND WALTON-CENTRAL WALTON- HOLMES-WASHINGTON-JACKSON-INLAND BAY-CALHOUN-INLAND GULF- INLAND FRANKLIN-GADSDEN-LEON-INLAND JEFFERSON-MADISON-LIBERTY- INLAND WAKULLA-INLAND TAYLOR-LAFAYETTE-INLAND DIXIE-SOUTH WALTON- COASTAL BAY-COASTAL GULF-COASTAL FRANKLIN-COASTAL JEFFERSON- COASTAL WAKULLA-COASTAL TAYLOR-COASTAL DIXIE-QUITMAN-CLAY- RANDOLPH-TERRELL-DOUGHERTY-LEE-WORTH-TURNER-TIFT-BEN HILL-IRWIN- EARLY-MILLER-BAKER-MITCHELL-COLQUITT-COOK-BERRIEN-SEMINOLE- DECATUR-GRADY-THOMAS-BROOKS-LOWNDES-LANIER- APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE RIVER FL OUT TO 20 NM- COASTAL WATERS FROM APALACHICOLA TO DESTIN FL OUT 20 NM- COASTAL WATERS FROM OCHLOCKONEE RIVER TO APALACHICOLA FL OUT TO 20 NM- COASTAL WATERS FROM SUWANNEE RIVER TO KEATON BEACH OUT 20 NM- WATERS FROM APALACHICOLA TO DESTIN FL FROM 20 TO 60 NM- WATERS FROM SUWANNEE RIVER TO APALACHICOLA FL FROM 20 TO 60 NM- 1020 AM EDT TUE JUL 17 2012 /920 AM CDT TUE JUL 17 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ALABAMA... SOUTHWEST AND SOUTH CENTRAL GEORGIA...AND THE FLORIDA BIG BEND AND PANHANDLE...AND ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT... NUMEROUS THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING. SOME STORMS COULD PRODUCE FREQUENT LIGHTNING STRIKES...GUSTY WINDS...AND VERY HEAVY RAIN. THERE IS A 5 PERCENT CHANCE OF A SEVERE THUNDERSTORM OCCURRING WITHIN 25 MILES OF A POINT. A SEVERE STORM IS DEFINED AS ONE THAT GENERATES WIND GUSTS OF AT LEAST 58 MPH AND...OR ONE INCH HAIL OR MORE. LOCALIZED RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE...WHICH COULD CAUSE FLOODING OF LOW LYING AND POOR DRAINAGE AREAS...ESPECIALLY IF THE HEAVY RAIN OCCURS IN A CITY. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... HIGHER THAN AVERAGE RAIN CHANCES WILL CONTINUE THROUGH AT LEAST THURSDAY. STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS AT TIMES AND AN ISOLATED SEVERE STORM CANNOT BE RULED OUT. HOWEVER...WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... WIDESPREAD SPOTTER ACTIVATION IS NOT EXPECTED TODAY. HOWEVER...SPOTTERS ARE URGED TO PAY CLOSE ATTENTION TO TODAYS WEATHER...IN CASE LOCALIZED ACTIVATION BECOMES NECESSARY. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE WEBSITE ON THE INTERNET AT WEATHER.GOV...THEN CLICK ON YOUR AREA OF INTEREST ON THE NATIONAL MAP. FOURNIER/HARRIGAN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1222 PM EDT TUE JUL 17 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1215 PM HAIL 6 N POULAN 31.60N 83.78W
07/17/2012 E1.00 INCH WORTH GA LAW ENFORCEMENT
LAW ENFORCEMENT REPORTS QUARTER INCH HAIL
&&
TLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
104 PM EDT TUE JUL 17 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1255 PM FLOOD 1 WSW COVERDALE 31.62N 83.73W
07/17/2012 TURNER GA LAW ENFORCEMENT
WATER OVER ROADWAY ALONG COVERDALE HWY
1255 PM TSTM WND DMG 2 E ASHBURN 31.72N 83.61W
07/17/2012 TURNER GA LAW ENFORCEMENT
TREES DOWN ALONG HWY 112 NEAR ASHBURN
&&
TLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
109 PM EDT TUE JUL 17 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 PM HAIL CAMILLA 31.23N 84.21W
07/17/2012 E1.00 INCH MITCHELL GA PUBLIC
QUARTER SIZE HAIL REPORTED IN CAMILLA.
&&
TLThe Eglin Afb radar (KEVX), 86 km away, was scanning. The volume nearest the first event began at 18:41 UTC.
22 thunderstorm wind, 2 hail. Local standard time, as filed.
The Bay County 911 dispatch reported a power line blown down at 800 N 15th Street in Mexico Beach. Monetary damage was estimated.
A tree was blown down a power line on County Road 259. Monetary damage was estimated.
A tree was blown down on a power line on Cherry Tree Road close to Highway 27. Monetary damage was estimated.
Trees were blown down near Mile Marker 161 on I-10. Monetary damage was estimated.
The public reported trees down at College Point. Monetary damage was estimated.
Roof damage occurred in the Piney Z subdivision. Monetary damage was estimated.
A tree was blown down onto a house at 5504 Hampton Oak Place. Monetary damage was estimated.
A tree was blown down across the roadway. Monetary damage was estimated.
A car crashed into a downed tree on Bucklake Road at Chaires Road. Monetary damage was estimated.
A tree was blown down onto a power line at Bucklake Road at Pedrick Road. Monetary damage was estimated.
A tree was blown down on Springhill Road about one mile south of Orange Ave. Monetary damage was estimated.
The Bay county 911 dispatch reported a tree down on a power line on East 9th Ct. Monetary damage was estimated.
Trees and limbs were blown onto power lines at Old St. Augustine Road at Southwood Plantation Road. Monetary damage was estimated.
A tree was in the road at March Road at Apalachee Pkwy. Monetary damage was estimated.
Trees and tree limbs were blown down onto a power line at Ro Co Co Road and Veterans Memorial Drive. Monetary damage was estimated.
Trees were blown down between Argyle and Ponce De Leon on U.S. 90. Monetary damage was estimated.
Trees and tree limbs were blown down onto power lines at Jefferson Road and Mahan Drive. Monetary damage was estimated.
A tree was in the roadway at Stone Road and Old Bainbridge Road. Monetary damage was estimated.
Trees were blown down at the corner of Rivers Road and La France Road near Crawfordville Highway. Monetary damage was estimated.
Trees and power lines were blown down at Burnt Mill Creek Road and State Highway 388. Monetary damage was estimated.
A tree was blown down on State Road 267. Monetary damage was estimated.
A tree was blown down and blocking Perkins Road. Monetary damage was estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2012Every state in 2012This day in weather historyWarnings in Florida, July 2012
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 391419, 391425, 391435, 391436, 391422, 391440, 391441, 391438, 391442, 391443, 391444, 391423, 391432, 391433, 391445, 391446, 391447, 391427, 391449, 391450, 391451, 391431, 391439, 391437.