Tropical Depression Irma moved into southwest Georgia during the afternoon and evening of the 11th. This resulted in windy conditions across northeast Alabama.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 HUN wrote it up.
Tropical Depression Irma moved into southwest Georgia during the afternoon and evening of the 11th. This resulted in windy conditions across northeast Alabama. North to northeast winds gusted over 35 mph in a few locations. This resulted in a few reports of trees and tree limbs being knocked down. A few hundred residents also lost power due to the downed tree limbs onto utility lines.
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 Huntsville, AL wrote its last area forecast discussion before the first event at Sep 11, 2:11 PM CST, 1 hour 49 minutes earlier.
Area Forecast Discussion National Weather Service Huntsville AL 311 PM CDT Mon Sep 11 2017 .NEAR TERM...(Tonight) Issued at 311 PM CDT Mon Sep 11 2017 The main focus for tonight concerns effects Tropical Storm Irma (now centered near the GA/FL border east of Tallahassee) will cause across the Tennessee Valley tonight. The storm well inland will continue weakening, becoming a Tropical Depression before daybreak Tuesday morning, as it heads towards this region. The official NHC track has it moving to the NW, between Huntsville and Birmingham Tue AM. As it approaches the region, widespread rain will overspread the region from the southeast. The rain so far has been detected across nearly all of the forecast area, with moderate to heavy showers moving in from western Georgia. Rainfall totals across the area tonight should range from around an inch across NW Alabama to over 2 inches over parts of northeast Alabama and adjacent southern middle Tennessee. Given this rain falling over the night time should not produce serious flooding issues. Along with the rain, winds will increase late this afternoon and evening from the north, as the TS center of circulation nears the region. Right now, we have northerly sustained winds in the 20-30 mph range, with gusts to 45 mph for our more eastern areas. Winds towards NW Alabama should be somewhat lighter, but still in the breezy to windy range. As such, a Wind Advisory activity set from 3 PM through 4 AM Tue AM remains in effect. The winds and abnormally cool temperatures will produce a raw night, with lows in the mid/upper 50s. .SHORT TERM...(Tuesday through Thursday) Issued at 311 PM CDT Mon Sep 11 2017 TD Irma should continue heading northwest from north of Birmingham Tuesday morning, moving towards NW Tennessee by Wednesday morning. The storm during this time should begin loosing its tropical characteristics. Rainfall amounts for the Tuesday through midweek timeframe overall should be lesser, which will help alleviate flash flooding concerns. However, rainfall runoff from this system should result in storm total amounts ranging from around 2 inches over NW AL to 3 to 3.5 inches over NE AL. This could cause hydrological issues concerning higher river levels around the Tennessee Valley. Cooler than normal weather will continue into the middle of this week. High temperatures both on Tue/Wed will only rise into the mid 60s. Normal highs for this time of year are in the mid 80s. The remnants of Irma meandering across the Ohio Valley should gradually weaken further and slide off to the east after mid week. With the system nearby, kept rain chances continuing into Thursday. Rainfall and chances however will become lower as the week progresses. Clouds should decrease after the midweek, which should help high temperatures recover into the mid/upper 70s by Thursday. .LONG TERM...(Thursday Night through Sunday) Issued at 311 PM CDT Mon Sep 11 2017 At the end of the week, what is left of Irma will lift from the OH Valley into New England. A sfc high will build down the Appalachian Mtns heading into the weekend and over the weekend an upper level ridge will build into the region. This will allow for a drier and warmer extended forecast period. Temps will warm back up to near normal values with highs in the low/mid 80s and overnight lows in the 60s. && .AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 1258 PM CDT Mon Sep 11 2017 Conditions across the region will deteriorate from SE to NW this afternoon and evening, as Tropical Storm Irma (now located over southern Georgia) heads northward, then to the northwest on Tues. Rain associated with this system will overspread the region from the SE this afternoon, bringing a reduction in CIG/VIS values into the MVFR ~2000 ft AGL/5SM range over KHSV late this afternoon, and in the later evening at KMSL. Reduction to IFR in both CIG/VIS values are expected at both terminals in the overnight. N-NE winds around 10 KT at the start of the TAF will becoming northerly, increasing to the 20-30 KT range by the late afternoon over KHSV, and 15-25 KT at KMSL. The storm should weaken to a depression, located south of KHSV before sunrise Tue. Winds should subside, then become easterly at KMSL, southeasterly at KHSV late in the TAF, with MVFR CIG/VIS and light rain continuing. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...Wind Advisory until 4 AM CDT Tuesday for ALZ001>010-016. TN...Wind Advisory until 4 AM CDT Tuesday for TNZ076-096-097. && NEAR TERM...RSB SHORT TERM...RSB LONG TERM...JMS AVIATION...RSB For more information please visit our website at weather.gov/huntsville.
Hazardous Weather Outlook National Weather Service Huntsville AL 401 PM CDT Mon Sep 11 2017 ALZ001>010-016-TNZ076-096-097-121215- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-De Kalb-Cullman-Moore-Lincoln-Franklin TN- 401 PM CDT Mon Sep 11 2017 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Tonight... Tropical Storm Irma will continue to lift north-northwestward through the evening and near the Tennessee Valley by early Tuesday morning. As it moves into central Alabama this evening, Irma will weaken further to a Tropical Depression near Birmingham. As a result, north to northeast winds will increase through the day into tonight, peaking at 25 to 30 mph, with gusts up to 50 mph, especially in the higher elevations along the Cumberland Plateau. A Wind Advisory is now in effect until 4 am Tuesday morning. In addition, bands of moderate to heavy rain will spread northwestward into the Tennessee Valley this afternoon into tonight. Localized ponding of water or minor street flooding may occur with the heavier showers. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday... No hazardous weather is expected at this time. .SPOTTER CALL TO ACTION STATEMENT... Activation of storm spotters and emergency management personnel is not anticipated at this time.
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
Multiple trees and tree limbs were knocked down causing power outages. One large tree was knocked down onto the roadway at 1848 Mount Olive Drive. Another tree was knocked down at the 4300 block of Pleasant Grove Road.
Multiple trees and power lines were knocked down due to high winds in the Sylvania and Henegar communities causing sporadic power outages.
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, September 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: 721571, 721572.