Alert archive / Mississippi / Special Weather Statements in 2017
Special Weather Statement, NWS Mobile, AL
NWS Mobile, AL issued this special weather statement at Aug 31, 2017, 10:20 AM CDT for Choctaw County, Alabama; Greene County, Wayne County, Mississippi. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 31, 2017, 10:20 AM CDT (15:20 UTC)
- Expired
- Aug 31, 2017, 11:00 AM CDT
- In force
- 40 min
- Issued by
- NWS Mobile, AL
Counties Choctaw County, AL, Greene County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 139 km from the middle of the area, began a volume at 15:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 3.3 hours before the alert went out and 207 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 724 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 569 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.5
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, 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 this special weather statement went out at Aug 31, 7:07 AM CDT, 3 hours 13 minutes earlier.
Area forecast discussion, Aug 31, 7:07 AM CDT, 3 hours 13 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Mobile AL
707 AM CDT Thu Aug 31 2017
.DISCUSSION...Updated for latest aviation discussion below.
&&
.AVIATION...
12Z issuance...Showers and thunderstorms will mainly impact the
western Florida panhandle and south central Alabama today, with
storms affecting the PNS site into early afternoon bringing MVFR
ceilings and IFR to MVFR visibilities. Could also see brief
periods of IFR cigs and visibilities in and around the strongest
thunderstorms. VFR conditions expected across the Mobile metro
area, with a few late afternoon thunderstorms possible. Windy
conditions is a concern today as south winds increase to near 20
knots with gusts to near 30 knots. /22
&&
.PREV DISCUSSION... /issued 506 AM CDT Thu Aug 31 2017/
NEAR TERM /Now Through Thursday night/...The remnants of Harvey
will continue to move northeast from northern Louisiana to western
Tennessee by late tonight. Another easternmost outer rain band
will again impact the forecast area today, mainly west of the
Alabama River with periods of heavy rainfall. Brief tornadoes are
also possible across a majority of the forecast area today into
the early evening hours. In addition, a high risk of rip currents,
high surf, minor coastal flooding around the Mobile Bay area, and
breezy to windy conditions will persist throughout the day.
The heaviest rainfall today is expected to occur west of the Alabama
River where widespread 1 to 3 inches should occur. Locally higher
rainfall amounts up to 5 inches are expected across the western
Florida panhandle. The Flash Flood Watch remains in effect for
portions of southwest Alabama and the western Florida panhandle
through this afternoon.
The risk for rip currents is high along the southwest Alabama and
western Florida beaches through tonight. Life threatening rip
currents are present in the surf zone and is dangerous for all
levels of swimmers.
A high surf advisory remains in effect along the gulf beaches of
Alabama and the western Florida panhandle, with surf heights around
5 feet persisting through this afternoon. Localized beach erosion
will occur.
Also, a coastal flood advisory for southwest Alabama is in effect
through this afternoon. Tidal gages and public reports are
indicating water levels have risen back to between 2 to 3 feet. The
water levels are expected to about one foot as the tide levels
increase early this morning.
A wind advisory also remains in effect for the coastal areas of
southwest Alabama and the western Florida panhandle west of Navarre
Beach.
High temperatures today will range from 85 to 90 degrees. Low
temperatures tonight will be in the low 70s, except for the mid 70s
along the coastal sections. /22
SHORT TERM /Friday Through Saturday night/...The remnants of
Harvey continue northeast into the Ohio Valley and weaken through
Saturday, leaving in its wake a weak boundary draped across the
area roughly oriented southwest to northeast along the I-65
corridor. This boundary, combined with modest deep layer moisture,
will serve as the focus for scattered showers and storms Friday
and Saturday, with the best chances along and east of I-65 where
the greatest moisture (PWATs around 1.6 to 1.8 inches) lingers.
North/west of the boundary, drier air settles in beneath weak
northwest flow on the back end of the broadening remnant
circulation.
Temperatures remain near seasonal through the short term, with
highs in the mid to upper 80's across the area and lows in the
upper 60's inland to mid 70's along the coast each night. /49
LONG TERM /Sunday Through Wednesday/...A vigorous shortwave digs
around the broad upper trough over the Great Lakes and eastern
Canada to begin the long term period. Model solutions continue to
be quite aggressive with this shortwave, ultimately deepening the
longwave trough south over the entire eastern CONUS and into the
northern Gulf. This shift pushes a strong front south through the
local area and into the Gulf around midweek. Ahead of this front,
a wetter than seasonal pattern returns as synoptic upper support
acts on improving deep-layer moisture and instability. In the
wake of this front, a much drier and cooler airmass could give the
Gulf coast its first taste of Fall-like weather, with solutions
hinting at lows in the 50's and highs in the low 70's making it
all the way south to the coast. While there remains some
uncertainty regarding the exact timing and magnitude of this
front, its existence is becoming more and more consistent among
model solutions and will thus warrant monitoring over the coming
weekend. /49
MARINE...A strong southerly wind flow will continue over the marine
area through this evening as the remnants of Harvey move northeast
into northern Mississippi. Higher winds and seas will be likely in
scattered to numerous showers and thunderstorms this morning. Winds
will gradually diminish through Friday, becoming light Friday night
into early next week as a surface ridge of high pressure gradually
builds west over the eastern and north central gulf. /22
&&
.MOB WATCHES/WARNINGS/ADVISORIES...
AL...Flash Flood Watch until 6 PM CDT this evening for ALZ055-056-059-
060-262-264-266.
Wind Advisory until 6 PM CDT this evening for ALZ263>266.
High Rip Current Risk until 6 PM CDT this evening for ALZ265-266.
High Surf Advisory until 6 PM CDT this evening for ALZ265-266.
Coastal Flood Advisory until 6 PM CDT this evening for
ALZ263>266.
FL...Flash Flood Watch until 6 PM CDT this evening for FLZ201>206.
Wind Advisory until 6 PM CDT this evening for FLZ202-204.
High Rip Current Risk until 6 PM CDT this evening for FLZ202-204-
206.
High Surf Advisory until 6 PM CDT this evening for FLZ202-204-
206.
MS...None.
GM...Small Craft Advisory until midnight CDT tonight for GMZ631-632-
650-655-670-675.
Small Craft Advisory until 9 PM CDT this evening for GMZ630-633-
634.
&&
This product is also available on the web at:
http://weather.gov/mobHazardous weather outlook, Aug 31, 6:00 AM CDT, 4 hours 20 minutes before
Hazardous Weather Outlook National Weather Service Mobile AL 600 AM CDT Thu Aug 31 2017 ALZ051>060-261>266-FLZ201>206-MSZ067-075-076-078-079-011100- 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- 600 AM CDT Thu Aug 31 2017 This Hazardous Weather Outlook is for portions of south central Alabama...southwest Alabama...northwest Florida and southeast Mississippi. .DAY ONE...Today and Tonight Locally heavy rainfall possible today, mainly for areas east of the Alabama River where a Flash Flood Watch is in effect. A few brief tornadoes are possible, generally east of the Alabama River this morning and across much of the outlook area this afternoon. A High Surf Advisory remains in effect for coastal Alabama and northwest Florida beaches today. Rip current risk will remain high through tonight. Coastal Flood Advisory in effect for the Alabama coast. Breezy to windy conditions are expected across the coastal areas of Alabama and the western Florida panhandle today. .DAYS TWO THROUGH SEVEN...Friday through Wednesday A moderate rip current risk is forecast for Friday and Friday night. .SPOTTER INFORMATION STATEMENT... Activation of SkyWarn Severe Storm Spotter networks is not expected through Wednesday. GMZ630>635-650-655-670-675-011100- 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- 600 AM CDT Thu Aug 31 2017 This Hazardous Weather Outlook is for portions of the coastal waters of Alabama and northwest Florida. .DAY ONE...Today and Tonight A Small Craft Advisory is in effect for strong southerly winds and high seas through this evening. .DAYS TWO THROUGH SEVEN...Friday through Wednesday No hazardous weather is expected at this time.
In the hours before
Special weather statement, Aug 31, 8:01 AM CDT, 2 hours 19 minutes before
Special Weather Statement
National Weather Service Mobile AL
801 AM CDT THU AUG 31 2017
ALZ060-FLZ203>206-311400-
Covington AL-Okaloosa Inland FL-Okaloosa Coastal FL-
Santa Rosa Coastal FL-Santa Rosa Inland FL-
801 AM CDT THU AUG 31 2017
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...COVINGTON...OKALOOSA AND SOUTHEASTERN SANTA ROSA COUNTIES
UNTIL 900 AM CDT...
At 801 AM CDT, the strong thunderstorms were located along a line
extending from 6 miles southeast of Dozier to Navarre Beach, and
moving east at 35 mph.
Winds in excess of 40 mph will be possible with these storms.
Locations impacted include...
Wright, Fort Walton Beach, Crestview, Niceville, Destin, Andalusia,
Eglin AFB, Opp, Valparaiso, Mary Esther, Florala, Ocean City, Lake
Lorraine, Baker, Navarre, Shalimar, Laurel Hill, Lockhart, Cinco
Bayou and Heath.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3099 8631 3048 8628 3041 8630 3042 8630
3042 8631 3038 8633 3038 8650 3029 8650
3029 8704 3036 8701 3037 8692 3037 8700
3153 8642 3145 8640 3153 8628 3146 8628
3144 8619 3100 8619
TIME...MOT...LOC 1301Z 268DEG 29KT 3144 8628 3037 8688Local storm report, Aug 31, 8:08 AM CDT, 2 hours 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
808 AM CDT THU AUG 31 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0732 AM MARINE TSTM WIND 2 WSW WOODLAWN BEACH 30.38N 87.02W
08/31/2017 M42 MPH SANTA ROSA FL MESONET
GB SOUNDSIDE WEATHER STATION MEASURED A THUNDERSTORM WIND
GUST OF 42MPH. MEASUREMENT VIA WEATHERFLOW.
&&
MBLocal storm report, Aug 31, 8:32 AM CDT, 1 hour 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
832 AM CDT THU AUG 31 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0808 AM MARINE TSTM WIND 4 W DESTIN 30.40N 86.56W
08/31/2017 M41 MPH GMZ635 FL MESONET
WIND GUST OF 41MPH MEASURED AT THE XFWB WEATHERFLOW SITE
IN FORT WALTON BEACH.
&&
MBSpecial weather statement, Aug 31, 9:31 AM CDT, 49 minutes before
Special Weather Statement
National Weather Service Mobile AL
931 AM CDT THU AUG 31 2017
FLZ205-206-311500-
Okaloosa Inland FL-Okaloosa Coastal FL-
931 AM CDT THU AUG 31 2017
...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...
SOUTHEASTERN OKALOOSA COUNTY UNTIL 1000 AM CDT...
At 931 AM CDT, the strong thunderstorm was located near Destin,
moving northeast at 35 mph.
Wind gusts up to 50 mph will be possible with this storm.
Locations impacted include...
Niceville, Destin, Eglin AFB and Valparaiso.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3033 8664 3065 8642 3064 8639 3046 8639
3048 8633 3047 8630 3048 8628 3045 8628
3042 8631 3042 8632 3038 8634 3040 8639
3038 8640 3038 8650 3029 8650 3029 8656
TIME...MOT...LOC 1431Z 211DEG 32KT 3035 8651Special weather statement, Aug 31, 9:48 AM CDT, 32 minutes before
Special Weather Statement
National Weather Service Mobile AL
948 AM CDT THU AUG 31 2017
FLZ205-311530-
Okaloosa Inland FL-
948 AM CDT THU AUG 31 2017
...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...
NORTHEASTERN OKALOOSA COUNTY UNTIL 1030 AM CDT...
At 947 AM CDT, the strong thunderstorm was located 8 miles northwest
of Valparaiso, moving north at 30 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Crestview and Laurel Hill.
LAT...LON 3056 8650 3058 8667 3100 8657 3099 8639
3077 8639
TIME...MOT...LOC 1447Z 197DEG 26KT 3060 8658Special weather statement, Aug 31, 10:20 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Mobile AL
1020 AM CDT THU AUG 31 2017
ALZ051-052-MSZ067-075-076-311600-
Choctaw AL-Washington AL-Perry MS-Greene MS-Wayne MS-
1020 AM CDT THU AUG 31 2017
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...CHOCTAW...NORTHWESTERN WASHINGTON...EASTERN PERRY...WAYNE
AND NORTHERN GREENE COUNTIES UNTIL 1100 AM CDT...
At 1019 AM CDT, the strong thunderstorms were located along a line
extending from 8 miles south of Crandall to 7 miles south of Clara to
McLain, and moving northeast at 45 mph.
Winds of 40 to 50 mph will be possible with these storms.
Locations impacted include...
Waynesboro, Butler, Clara, Lisman, Millry, McLain, State Line,
Buckatunna, Silas, Fruitdale, Gilbertown and Toxey.
LAT...LON 3231 8808 3197 8819 3136 8834 3098 8896
3184 8875 3190 8847 3229 8842 3231 8838
TIME...MOT...LOC 1519Z 217DEG 39KT 3186 8853 3147 8866 3112 8882The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:31 PM CDT | Special Weather Statement | MOB | Washington | 44 min |
| Aug 31, 1:17 AM CDT | Special Marine Warning | MOB | 43 min | |
| Aug 31, 2:17 AM CDT | Special Marine Warning | MOB | 28 min | |
| Aug 31, 3:11 AM CDT | Special Weather Statement | MOB | Covington | 34 min |
| Aug 31, 4:38 AM CDT | Special Weather Statement | MOB | Mobile | 37 min |
| Aug 31, 4:40 AM CDT | Areal Flood Advisory | MOB | Baldwin | 3 hr |
| Aug 31, 4:50 AM CDT | Areal Flood Advisory | MOB | Covington | 3 hr |
| Aug 31, 6:35 AM CDT | Areal Flood Advisory | MOB | Baldwin | 3 hr |
| Aug 31, 6:45 AM CDT | Special Marine Warning | MOB | 60 min | |
| Aug 31, 7:16 AM CDT | Special Weather Statement | MOB | Covington | 59 min |
| Aug 31, 7:37 AM CDT | Areal Flood Advisory | MOB | Covington, Escambia | 3 hr |
| Aug 31, 8:00 AM CDT | Special Marine Warning | MOB | 60 min | |
| Aug 31, 8:01 AM CDT | Special Weather Statement | MOB | Covington | 59 min |
| Aug 31, 9:02 AM CDT | Special Marine Warning | MOB | 58 min | |
| Aug 31, 9:06 AM CDT | Special Marine Warning | MOB | 54 min | |
| Aug 31, 9:46 AM CDT | Special Marine Warning | MOB | 44 min | |
| Aug 31, 10:00 AM CDT | Special Marine Warning | MOB | 60 min | |
| Aug 31, 11:03 AM CDT | Special Marine Warning | MOB | 57 min | |
| Aug 31, 11:06 AM CDT | Special Weather Statement | MOB | Choctaw | 39 min |
| Aug 31, 11:37 AM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke | 38 min |
| Aug 31, 12:56 PM CDT | Special Marine Warning | MOB | 64 min | |
| Aug 31, 3:03 PM CDT | River Flood Warning | MOB | Covington, Escambia | 54 hr |
| Aug 31, 3:06 PM CDT | River Flood Warning | MOB | Baldwin | 22 hr |
| Aug 31, 3:46 PM CDT | Special Weather Statement | MOB | Wilcox | 14 min |
| Aug 31, 7:10 AM CDT | Special Weather Statement | MOB | Santa Rosa | 35 min |
| Aug 31, 9:31 AM CDT | Special Weather Statement | MOB | Okaloosa | 29 min |
| Aug 31, 9:48 AM CDT | Special Weather Statement | MOB | Okaloosa | 42 min |
| Aug 31, 10:16 AM CDT | Flash Flood Warning | MOB | Okaloosa | 3 hr |
| Aug 31, 10:33 AM CDT | River Flood Warning | MOB | Okaloosa | 3 days |
| Aug 31, 10:54 AM CDT | Areal Flood Advisory | MOB | Okaloosa | 51 min |
| Aug 31, 1:36 PM CDT | Special Weather Statement | MOB | Wayne | 39 min |
Nearby
Special Weather Statements in Mississippi, 2017Special Weather Statements in Alabama, 2017Every special weather statement in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.