A cluster of slow moving thunderstorms developed during the early morning hours of August 1st near Panama City, resulting in flash flooding.
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The episode as NWS TAE wrote it up.
A cluster of slow moving thunderstorms developed during the early morning hours of August 1st near Panama City, resulting in flash flooding.
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 Aug 1, 12:14 AM CST, 6 hours 46 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TALLAHASSEE FL 214 AM EDT Thu Aug 1 2013 .NEAR TERM [Today]... The east coast upper trough and associated shortwave energy will begin to move off to our northeast today but not before one more day of widespread convection. The highest PoPs (70%) will be over the region in and around Valdosta as well as most of the eastern Big Bend. A drier airmass will gradually filter in from west to east late this afternoon and evening. Highs will be around 90 to the lower 90s. && .SHORT TERM [Tonight through Saturday]... The 500mb trough that has been impacting our local weather the past few days will lift out of our area tonight and Friday. The latest NWP guidance continues its recent trend of forecasting a band of sinking, drying air aloft developing over much of our forecast area on Friday, especially over GA and AL. Although there will be some drying from Tallahassee southeastward, there will probably be enough deep layer moisture to support isolated to scattered showers & thunderstorms. This same weather pattern will hold through Saturday, and our PoP ranges from 20% around Dothan and Albany to 30% around Cross City and Valdosta both Friday and Saturday. The highest rain chances are during the morning hours over the coastal waters and beaches, and during the afternoon and evening hours inland. Drier air and rising heights usually mean warmer temperatures, and highs inland will be in the mid 90s, with some of our normally warmer locations possibly reaching the upper 90s. While dewpoints may drop slightly from their current high levels (especially around Dothan and Albany), the combination of heat and humidity will yield heat index values in the 100 to 104 degree range each afternoon. && .LONG TERM [Saturday night through Wednesday]... Zonal flow pattern at upper levels should remain in place through the weekend, with the jet stream over the northern U.S. and a ridge in place over the southern tier of states. Precipitation chances will remain low over our area Saturday and Sunday, with scattered showers and thunderstorms possible mainly during the afternoon and evening hours. During the beginning of the next week, moisture is expected to increase over the Southeast, and another upper shortwave could potentially impact our area, leading to increased precipitation chances during this time. && .AVIATION [Through 06Z Friday]... We will continue to see IFR CIGS/VSBYS develop across the local region this morning due to all the residual moisture from yesterday's thunderstorms. VFR conditions return shortly after daybreak but we expect another active day with convection this afternoon and evening. Winds will be west to southwest around 10 knots. && .MARINE... A ridge will remain south of the coastal waters through the weekend, keeping southwest to west winds around 10 KT across our marine area. Seas will remain 2 feet or less. && .FIRE WEATHER... No fire weather concerns. && .HYDROLOGY... The Choctawhatchee at Bruce was in minor flood, but will fall slowly through the weekend, possible falling below flood stage early next week. Although drier air will gradually infiltrate our forecast area from northwest to southeast later tonight and Friday, Precip Water values remain above average today. The GFS forecast storm motion is only around 5 KT, which means that there is a low-end threat for flash flooding, mainly over small, fast-reacting basins such as urban areas and along small streams with current above-normal stream flow. && .PRELIMINARY POINT TEMPS/POPS... Tallahassee 92 74 95 75 95 / 70 30 20 20 20 Panama City 90 78 90 78 90 / 60 30 20 10 20 Dothan 92 73 97 73 96 / 50 30 20 10 20 Albany 92 74 96 73 96 / 60 30 20 10 20 Valdosta 92 73 97 74 95 / 70 30 30 20 20 Cross City 90 73 92 74 93 / 60 20 30 20 30 Apalachicola 89 77 89 77 89 / 60 20 20 10 20 && .TAE WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AL...None. GM...None. && NEAR TERM...Barry SHORT TERM...Fournier LONG TERM...Moore/Lahr MARINE...Fournier AVIATION...Barry HYDROLOGY...Fournier
The Eglin Afb radar (KEVX), 46 km away, was scanning. The volume nearest the first event began at 12:57 UTC.
2 flash flood. Local standard time, as filed.
Flash flooding was reported along Thomas Drive in Panama City Beach with running water reducing it to one lane. Dual-pol radar rainfall estimates ranged from 5.50-6.25 in about a 3 hour period.
The public reported water running curb to curb on area roads in the Callaway area. Dual pol radar estimated between 6.5-7.25 of rain had fallen in the area during the last 6 hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2013Every state in 2013This day in weather historyWarnings in Florida, August 2013
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: 475680, 475681.