A stalled frontal boundary combined with an extremely moist airmass aided in the development of thunderstorms across southern Mississippi. Several reports of flash flooding were received as well as one report of wind damage.
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 LIX wrote it up.
A stalled frontal boundary combined with an extremely moist airmass aided in the development of thunderstorms across southern Mississippi. Several reports of flash flooding were received as well as one report of wind damage.
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 New Orleans, LA wrote its last area forecast discussion before the first event at Jun 27, 7:21 AM CST, 2 hours 56 minutes earlier.
Area Forecast Discussion
National Weather Service New Orleans LA
821 AM CDT Tue Jun 27 2017
...SOUNDING DISCUSSION...
The sounding this morning still depicts the drier air in place at
low levels. Winds are light from the northeast at the surface
under a temperature inversion in the first 800 feet. Winds then
switch to westerly throughout the rest of the profile. Showers
and storms should again be confined to coastal areas and offshore
waters today. Low level moisture will begin to return further
inland later tonight.
Krautmann
&&
.PREV DISCUSSION... /issued 346 AM CDT Tue Jun 27 2017/
SHORT TERM...
No appreciable change in thinking from previous fcasts. Moisture
and higher dp temps will move back over the area starting tonight.
The pattern mostly looks to mirror a normal summer regime through
this week with basically hit and miss sh/ts each day with a
diurnal fluctuation in development. The highest chances of sh/ts
should be Wednesday and Thursday as a deep tropical moisture
surge moves in from the southwest late in the day Wednesday. This
occurs in response to the upper trough over the northeast
sharpening and gently digging to the southwest over east Texas
forcing this deep moisture to the northeast ahead of the upper
synoptic trough, which is the reason this scenario is synoptically
viable.
AVIATION...
Most terminals should remain VFR with generally light and variable
winds and little in the way of cloud cover. The one holdout is KHUM,
where light rain has been falling. In addition, no observations have
been received for the last five or six hours. Therefore, AMD NOT
SKED has been sent with the 06Z TAF issuance.
MARINE...
Front continues to be stalled just south of the Louisiana coastline.
High pressure will continue to slowly build to the east-southeast
and the current offshore east-northeasterly winds will slowly begin
to veer around to easterly by tomorrow. Winds will continue to veer
around with onshore flow returning late Tuesday night and more so
Wednesday. Persistent southeast fetch across the Gulf will dominate
throughout the rest of the week.
DECISION SUPPORT...
DSS code: Blue.
Deployed: None.
Activation: None.
Activities: Monitoring Hydro/Convective trends
Decision Support Services (DSS) Code Legend
Green = No weather impacts that require action.
Blue = Long-fused watch, warning, or advisory in effect or
high visibility event.
Yellow = Heightened impacts with short-fused watch, warning or
advisory issuances; radar support.
Orange = High Impacts; Slight to Moderate risk severe; nearby tropical
events; HazMat or other large episodes.
Red = Full engagement for Moderate risk of severe and/or
direct tropical threats; Events of National Significance.
&&
.PRELIMINARY POINT TEMPS/POPS...
MCB 87 68 87 70 / 10 0 40 20
BTR 86 70 87 72 / 20 10 50 30
ASD 87 71 86 72 / 10 10 50 40
MSY 84 73 84 73 / 20 10 50 40
GPT 86 74 85 73 / 10 10 40 40
PQL 89 71 87 72 / 10 10 40 40
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...None.
GM...None.
MS...None.
GM...None.
&&Hazardous Weather Outlook National Weather Service New Orleans LA 1116 AM CDT Tue Jun 27 2017 GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037- 039-040-046>050-056>072-MSZ068>071-077-080>082-280430- Lake Pontchartrain and Lake Maurepas-Mississippi Sound- Lake Borgne-Chandeleur Sound-Breton Sound- Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm- Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM- Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm- Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM- Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM- Coastal waters from Southwest Pass of the Mississippi River to Port Fourchon Louisiana from 20 to 60 NM- Coastal Waters from Stake Island LA to Southwest Pass of the Mississippi River from 20 to 60 nm- Coastal waters from Pascagoula Mississippi to Stake Island Louisiana out 20 to 60 NM-Pointe Coupee-West Feliciana- East Feliciana-St. Helena-Washington-St. Tammany-Iberville- West Baton Rouge-East Baton Rouge-Ascension-Livingston-Assumption- St. James-St. John The Baptist-Upper Lafourche-St. Charles- Upper Jefferson-Orleans-Upper Plaquemines-Upper St. Bernard- Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson- Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa- Southern Tangipahoa-Wilkinson-Amite-Pike-Walthall-Pearl River- Hancock-Harrison-Jackson- 1116 AM CDT Tue Jun 27 2017 This Hazardous Weather Outlook is for portions of Southeast Louisiana...South Mississippi and the adjacent coastal waters. .DAY ONE...This Afternoon and Tonight Isolated thunderstorms should remain confined to the Louisiana coastal marshes and near shore waters through the afternoon hours. Main concern will be gusty winds, occasional lightning,and brief heavy downpours. .DAYS TWO THROUGH SEVEN...Wednesday through Monday There will be a chance for typical summertime afternoon thunderstorms each day from Wednesday through Saturday. The main concerns will be occasional lightning, brief torrential rainfall and gusty winds in close proximity to any storms. Organized severe thunderstorms are not expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. CAB
The national radar mosaic for the moment the first event began.
3 flash flood, 2 thunderstorm wind, 1 funnel cloud. Local standard time, as filed.
A NWS employee and several fire department personnel observed a funnel cloud just north of Highway 90 and west of Highway 603 in the community of Waveland. The funnel cloud drifted north for several minutes. Although early indications were that the funnel cloud touched down, field inspection of the area indicated no damage to trees or buildings.
A small tree was reported blown down along Harbor Drive. Report relayed by social media.
A traffic signal was knocked down along Veterans Avenue. Report was relayed via social media.
The Jackson County Sheriff's Office reported roads were becoming impassable off Mississippi Highway 57 in the Vancleave area. In addition, flooding of roads was reported in the Hurley and Wade communities.
Significant street flooding was reported on US Highway 49 just north of 15th Street. Flooding was also reported on Seaway Road just south of Interstate 10, and on Canal Road and Pass Road in Gulfport.
Social media reports from a local television station reported significant street flooding and partially submerged vehicles on Hawthorne Drive in Long Beach.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2017Every state in 2017This day in weather historyWarnings in Mississippi, June 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: 710944, 707044, 707045, 707041, 707042, 707043.