Slow moving thunderstorms produced heavy rain which caused flooding in the western Florida panhandle.
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The episode as NWS MOB wrote it up.
Slow moving thunderstorms produced heavy rain which caused flooding in the western Florida panhandle.
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 Mobile, AL wrote its last area forecast discussion before the first event at Aug 21, 12:23 PM CST, 2 hours 7 minutes earlier.
Area Forecast Discussion National Weather Service Mobile AL 123 PM CDT Sat Aug 21 2021 .NEAR TERM /Now Through Sunday/...An upper level low pressure system will remain centered over northern Virginia through tonight with troughing extending southwest into the southeastern states. The upper level low will then dance the Fujiwara with Henri over the Mid-Atlantic, helping to pull Henri into the northeastern U.S. on Sunday and pivoting the trough axis eastward. An upper level high pressure system on its heels centered over the ArkLaTex region will persist through the near term. This continues to promote northerly to northwesterly flow aloft over the area through Sunday. At the surface, high pressure remains centered over the northern Gulf of Mexico through Sunday as it weakens. Weak disturbances within the upper level flow round the periphery of the trough/ridge pair, with our next one expected this afternoon and evening with scattered to at times numerous showers and thunderstorms are expected to develop over the area this afternoon into early evening. PWATs remain in the 2.1 to 2.3 inch range, and afternoon SBCAPE/MLCAPE values will peak around 2,500/1,500j/kg respectively. This will support robust thunderstorms development, and likewise, with relatively slow moving convection, very heavy rainfall with storms. The main area of concern this afternoon will be north of a line from Waynesboro MS to Florala AL, where SPC has a marginal risk for severe thunderstorms. DCAPE values remain rather low, only around 500 to 750j/kg, owing to a rather moist atmospheric column. This should help preclude stronger wind gusts with storms, although extensive water loading of updrafts with storm collisions could support a stronger gust or two. The local area also remains in a marginal risk for excessive rainfall today. By this evening, overall convective coverage should decrease to mainly isolated over the region. Highs this afternoon remain on track to reach the lower to middle 90's, with lows tonight in the middle 70's. Heat indices will range between 100 and 105 degrees. A High Risk of rip currents remains in place through tonight due to remaining swell from Hurricane Grace, high tidal ranges, and an outgoing tide during the afternoon and evening. Sunday will be rather similar to today, with the next upper level disturbance moving slowly southward throughout the day, mainly over the eastern portion of the forecast area. We therefore anticipate scattered to perhaps numerous showers and thunderstorms at times, with similar coverage to today. This will particularly be the case further east as you head into the central FL panhandle and south-central AL closer to the stronger section of the upper level disturbance. SBCAPE/MLCAPE values will likely approach the 3,000/2,500j/kg range respectively, along with DCAPE values around 1,000j/kg. The potential remains for gusty winds with storms. PWATs remain high in the 2 to 2.4 inch range, continuing to favor very heavy rainfall with thunderstorms and continue the potential for nuisance flooding. Afternoon temperatures will generally be in the lower to middle 90's, with heat indices in the 101 to 107 degree range. /22 && .AVIATION... 18Z issuance...Showers and thunderstorm coverage is expected to increase this afternoon and gradually spread southeastward across much of the region through the early evening hours. Some of these storms will produce torrential downpours with localized MVFR to IFR conditions as well as brief gusty winds and frequent lightning. Outside of any of the showers and storms, ceilings and visibilities should remain VFR with light westerly to southwesterly winds. /22 && .MOB WATCHES/WARNINGS/ADVISORIES... AL...High Rip Current Risk through late tonight for ALZ265-266. FL...High Rip Current Risk through late tonight for FLZ202-204-206. MS...None. GM...None. && This product is also available on the web at: http://weather.gov/mob
The Eglin Afb radar (KEVX), 68 km away, was scanning. The volume nearest the first event began at 20:29 UTC.
1 flash flood. Local standard time, as filed.
Flash flooding from heavy rain closed Hughes Street between Eglin Parkway and Beal Parkway northeast. High water rescues of three adults and one child from flooded vehicles.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2021Every state in 2021This day in weather historyWarnings in Florida, August 2021
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: 983387.