The eastern fringes of Tropical Storm Harvey produced heavy rain over the area, which resulted in flooding in southwest Alabama.
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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 MOB wrote it up.
The eastern fringes of Tropical Storm Harvey produced heavy rain over the area, which resulted in flooding in southwest Alabama.
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 29, 6:13 PM CST, 42 minutes earlier.
Area Forecast Discussion
National Weather Service Mobile AL
713 PM CDT Tue Aug 29 2017
.DISCUSSION...Updated for latest aviation discussion below.
&&
.AVIATION...
30/00Z issuance...Bands of rain on the far eastern periphery of
TS Harvey will become more widespread across the local area
tonight and Wednesday as the storms center lifts northeast through
western Lousiana. Very moist air will lift up and over a frontal
boundary that is just offshore, resulting in the potential for
areas of heavy rainfall. General MVFR level CIGs/VISBYs expected
over most of the area, but will see drops to IFR and even LIFR
overnight in and near areas of heavier rain, showers and isolated
thunderstorms. Same conditions expected through most of the day on
Wednesday as well as the front mentioned earlier lifts north
across the area. Surface winds more northeast and east early in
the forecast period, becoming more southeast and south during the
middle and latter part of the forecast period. Generally around
10 to 12 knots prevailing winds, but gusting up to 20 to 25 knots
at times, especially in rain areas. 12/DS
&&
.PREV DISCUSSION... /issued 426 PM CDT Tue Aug 29 2017/
NEAR TERM /Now Through Wednesday/...An assessment of environmental
moisture from 29.12Z raobs show a rich and very deep tropical
airmass in place with pwat values ranging from 2.3 to 2.7 inches
over the central Gulf coast. These values stand at 130 to 150% of
climatological normals. Embedded in this moisture, weather maps
continue to show a quasi-stationary frontal boundary, draped east
to west across the central Gulf coast, while tropical storm Harvey
was moving agonizingly slow off the upper Texas coast. Bands of
showers and storms will continue to rotate northward off the Gulf.
Synoptic scale cyclonic flow associated with Harvey's
circulation, flowing atop stalled Gulf boundary, maintains large
scale ascent and the potential for locally heavy rains thru the
near term. There are also concerns for isolated tornadoes
generally confined to the coastal zones as clusters of storms over
the marine area lift northward. As these cells cross over the
frontal zone, an increase in 0-1KM storm relative helicity values
above 150 M2/S2, as shown in latest SPC mesoscale analysis, may
produce some rotational couplets thru tonight.
On Wednesday, as the circulation of Harvey lifts northeast up
across southwest Louisiana, the low level wind field expands with
a net increase in southerly H85 flow to around 40kts generally
west of the I-65 corridor. This coupled with daytime instability
and an increase in 0-1km storm relative helicity favors a slight
risk of severe weather with the main threat being isolated
tornadoes. This generally confined to areas along and west of
I-65. The strongest storms in bands will be efficient in
depositing locally heavy rains, with the threat of flooding mostly
confined to the southern zones. Rip current risk becomes high at
the beaches tonight and Wednesday.
With clouds and rain on Wednesday, have trended lower with
daytime highs overall with numbers holding in the 70s over the
western zones, lower half of the 80s eastern zones. Lows change
little, a mild lower to mid 70s. /10
SHORT TERM /Wednesday night Through Friday night/...Harvey's
circulation begins to phase with a sharpening mid level trof over
the Mid-South Wednesday night. Remnants of Harvey begin to lift
northeast at a faster rate of speed Thursday and Friday over the
Lower Mississippi and Tennessee River Valley. With Harvey's low
center passing by to our north, will remain in a deep, moist
southerly flow with convective bands passing thru. Rain chances to
remain elevated. Some of the rains locally heavy which could
bring instances of flooding thru Thursday night. Mid level
impulses passing to the northeast in the higher level southwest
flow will keep a modest rain chance going into Friday.
Latest high resolution models have shown a trend to a more wet
pattern with storm total rains now looking to range from 4 to 8
inches, over the flash flood watch area which is in effect thru
Thursday evening. Locally higher amounts possible, depending on
where the heavier rain bands set up.
Expect highs to range from lower half of the 80's Thursday and mid
80's Friday. Little change in night-time lows. /10
LONG TERM /Saturday Through Tuesday/...As we head into the weekend,
the remnants of Harvey continue to lift their way up across the
Ohio River Valley and New England states. Still expecting to see
scattered shower and thunderstorm activity through the weekend and
into early next week however, as deep layer moisture lingers and
high pressure builds over the central Gulf. Temperatures over the
weekend and early next week continue to run in the mid to upper
80's across the area each day, and lower to mid 70's each night.
Looking even further into the distant future, Medium range
forecasts show a front sinking southward into the Mid-South by
Tuesday with the potential of yet another low over the west Gulf
early next week. Quite a bit of spread this far out in the global
guidance and will require further monitoring as the current week
progresses. /10
MARINE...Moderate to strong east to northeast flow will become
southeasterly as a stalled surface front moves onshore overnight.
Moderate to strong southerly flow will follow, and last into
Thursday, then ease into the weekend. Due to the strength and
duration of the onshore fetch thru mid week, high seas develop.
Small craft advisories remain in place thru Friday morning. /10
&&
.MOB WATCHES/WARNINGS/ADVISORIES...
AL...Flash Flood Watch through Thursday evening for ALZ052-261>266.
High Rip Current Risk through Wednesday afternoon for ALZ265-266.
FL...Flash Flood Watch through Thursday evening for FLZ201>206.
High Rip Current Risk through Wednesday afternoon for FLZ202-204-
206.
MS...Flash Flood Watch through Thursday evening for MSZ075-076-078-
079.
GM...Small Craft Advisory until 7 AM CDT Friday for GMZ631-632-650-
655-670-675.
&&
This product is also available on the web at:
http://weather.gov/mobHazardous Weather Outlook...UPDATED National Weather Service Mobile AL 234 PM CDT Tue Aug 29 2017 ALZ051>060-261>266-FLZ201>206-MSZ067-075-076-078-079-302000- Choctaw-Washington-Clarke-Wilcox-Monroe-Conecuh-Butler-Crenshaw- Escambia-Covington-Mobile Inland-Baldwin Inland-Mobile Central- Baldwin Central-Mobile Coastal-Baldwin Coastal-Escambia Inland- Escambia Coastal-Santa Rosa Inland-Santa Rosa Coastal- Okaloosa Inland-Okaloosa Coastal-Wayne-Perry-Greene-Stone-George- 234 PM CDT Tue Aug 29 2017 This Hazardous Weather Outlook is for portions of south central Alabama...southwest Alabama...northwest Florida and southeast Mississippi. .DAY ONE...This Afternoon and Tonight Locally heavy rainfall possible through tonight across southeast Mississippi, southwest Alabama and the western Florida panhandle. Some of the rains have the potential of producing localized flash flooding. As rain bands spread northward off the Gulf, a few tornadoes are possible, generally over the coastal counties. Rip current risk for coastal Alabama and northwest Florida beaches becomes high beginning tonight. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Locally heavy rainfall threat continues across southeast Mississippi, southwest Alabama and the western Florida panhandle through the middle of the week. Some of the rains have the potential of producing localized flash flooding. As rain bands spread northward off the Gulf, a few tornadoes are possible Wednesday, generally west of Interstate 65. Rip current risk for coastal Alabama and northwest Florida beaches remains high on Wednesday. .SPOTTER INFORMATION STATEMENT... Activation of SkyWarn Severe Storm Spotter networks is not expected through Monday. GMZ630>635-650-655-670-675-302000- Northern Mobile Bay-Southern Mobile Bay-Mississippi Sound- Perdido Bay-Pensacola Bay System-Choctawhatchee Bay- Coastal waters from Pensacola FL to Pascagoula MS out 20 NM- Coastal waters from Destin to Pensacola FL out 20 NM- Waters from Pensacola FL to Pascagoula MS from 20 to 60 NM- Waters from Destin to Pensacola FL from 20 to 60 NM- 234 PM CDT Tue Aug 29 2017 This Hazardous Weather Outlook is for portions of the coastal waters of Alabama and northwest Florida. .DAY ONE...This Afternoon and Tonight A moderate to strong onshore flow and building seas will create hazardous conditions for small craft tonight as Tropical Storm Harvey lifts northeast over the northwest Gulf of Mexico. A few waterspouts are possible in the heavier rain bands. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A moderate to strong onshore flow persists into the middle of the week, creating hazardous conditions for small craft Wednesday through Thursday night as Tropical Storm Harvey continues to move northeast across Louisiana and northern Mississippi. A few waterspouts are possible in the heavier rain bands.
The Mobile radar (KMOB), 16 km away, was scanning. The volume nearest the first event began at 00:56 UTC.
2 flash flood. Local standard time, as filed.
Heavy rain caused water to flow over the roadway.
Heavy rain caused water to flow over the roadway.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2017Every state in 2017This day in weather historyWarnings in Alabama, August 2017
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: 719446, 719447.