Alert archive / Mississippi / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 153, NWS Mobile, AL

April 30, 20174 counties in Mississippi; Clarke County, Mobile County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 30, 2017, 2:00 PM CDT for 4 counties in Mississippi; Clarke County, Mobile County, Washington County, Alabama. It was in force for 60 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
Apr 30, 2017, 2:00 PM CDT (19:00 UTC)
Expired
Apr 30, 2017, 3:00 PM CDT
In force
60 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Clarke County, AL, Mobile County, AL, Washington County, AL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 40 km from the middle of the area, began a volume at 19:00 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 30, 7:32 AM CDTTornado WatchSPC7 hr
Apr 30, 10:36 AM CDTTornado WatchSPC8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.0 hours before the alert went out and 128 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.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2017-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1930 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2017-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1930 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
551 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
232 m²/s²
Significant tornado parameter
1.4
Supercell composite
7.9

Open this sounding in Storm Lab

The text

As transmitted.

624 
WUUS54 KMOB 301900
SVRMOB
ALC025-097-129-MSC039-041-111-131-302000-
/O.NEW.KMOB.SV.W.0153.170430T1900Z-170430T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
200 PM CDT SUN APR 30 2017

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northwestern Mobile County in southwestern Alabama...
  Southern Washington County in southwestern Alabama...
  South central Clarke County in southwestern Alabama...
  George County in southeastern Mississippi...
  Southeastern Perry County in southeastern Mississippi...
  Greene County in southeastern Mississippi...
  Eastern Stone County in southeastern Mississippi...

* Until 300 PM CDT

* At 159 PM CDT, severe thunderstorms were located along a line
  extending from near Deer Park to 12 miles southwest of Lucedale to
  6 miles east of Saucier to near Long Beach, moving east at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Citronelle, Lucedale, Leakesville, Chunchula, Gulfcrest, Deer Park,
  Calvert, Mount Vernon, McLain, Semmes, Tanner Williams, McIntosh,
  Wilmer and Movico.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not 
immediately likely, and for your protection, move to an interior 
room on the lowest floor of a building.

&&

A tornado watch remains in effect until 300 PM CDT for southeastern
Mississippi. A tornado watch also remains in effect until 700 PM CDT
for southwestern Alabama.

LAT...LON 3084 8893 3127 8884 3127 8807 3134 8778
      3075 8823 3065 8841 3074 8841 3073 8888
      3068 8889 3068 8905
TIME...MOT...LOC 1859Z 272DEG 17KT 3125 8834 3078 8871 3060 8903 3032
8917

HAIL...0.75IN
WIND...60MPH
 
$$

Butts
3 follow-up statements
474 
WWUS54 KMOB 301927
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
227 PM CDT SUN APR 30 2017

MSC111-131-301936-
/O.CAN.KMOB.SV.W.0153.000000T0000Z-170430T2000Z/
Perry MS-Stone MS-
227 PM CDT SUN APR 30 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PERRY AND EASTERN
STONE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 300 PM CDT for southeastern
Mississippi. 

Additional statements will be issued as conditions warrant.

LAT...LON 3087 8889 3091 8887 3091 8883 3100 8884
      3119 8877 3127 8866 3127 8807 3134 8778
      3116 8792 3116 8793 3113 8794 3075 8823
      3073 8832 3074 8841 3074 8889
TIME...MOT...LOC 1926Z 236DEG 33KT 3124 8820 3094 8846 3076 8878 3048
8892

$$

ALC025-097-129-MSC039-041-302000-
/O.CON.KMOB.SV.W.0153.000000T0000Z-170430T2000Z/
Mobile AL-Washington AL-Clarke AL-George MS-Greene MS-
227 PM CDT SUN APR 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR NORTHWESTERN MOBILE...SOUTHERN WASHINGTON...SOUTH CENTRAL
CLARKE...GEORGE AND SOUTHERN GREENE COUNTIES...

At 226 PM CDT, severe thunderstorms were located along a line
extending from 6 miles east of Deer Park to 8 miles east of Lucedale
to 14 miles northwest of Wade to near D'iberville, moving northeast
at 40 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Citronelle, Lucedale, Leakesville, Chunchula, Gulfcrest, Deer Park,
Mount Vernon, Calvert, Semmes, McIntosh, Movico and Wilmer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not 
immediately likely, for your protection, move to an interior room on 
the lowest floor of a building.

Additional statements will be issued as conditions warrant.

&&

A tornado watch remains in effect until 300 PM CDT for southeastern
Mississippi. A tornado watch also remains in effect until 700 PM CDT
for southwestern Alabama.

LAT...LON 3087 8889 3091 8887 3091 8883 3100 8884
      3119 8877 3127 8866 3127 8807 3134 8778
      3116 8792 3116 8793 3113 8794 3075 8823
      3073 8832 3074 8841 3074 8889
TIME...MOT...LOC 1926Z 236DEG 33KT 3124 8820 3094 8846 3076 8878 3048
8892

HAIL...<.75IN
WIND...60MPH
 
$$

Butts
459 
WWUS54 KMOB 301941
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
241 PM CDT SUN APR 30 2017

ALC025-097-129-MSC039-041-302000-
/O.CON.KMOB.SV.W.0153.000000T0000Z-170430T2000Z/
Mobile AL-Washington AL-Clarke AL-George MS-Greene MS-
241 PM CDT SUN APR 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR NORTHWESTERN MOBILE...SOUTHERN WASHINGTON...SOUTH CENTRAL
CLARKE...GEORGE AND SOUTHEASTERN GREENE COUNTIES...

At 240 PM CDT, severe thunderstorms were located along a line
extending from 6 miles west of McIntosh to 8 miles north of Wilmer to
11 miles northwest of Wade to Latimer, moving east at 20 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Citronelle, Lucedale, Chunchula, Gulfcrest, Deer Park, Mount Vernon,
Calvert, Semmes, McIntosh, Movico and Wilmer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not 
immediately likely, for your protection, move to an interior room on 
the lowest floor of a building.

Additional statements will be issued as conditions warrant.

&&

A tornado watch remains in effect until 300 PM CDT for southeastern
Mississippi. A tornado watch also remains in effect until 700 PM CDT
for southwestern Alabama.

LAT...LON 3087 8889 3091 8885 3091 8883 3093 8883
      3096 8881 3098 8869 3113 8857 3127 8844
      3127 8807 3134 8778 3116 8792 3116 8793
      3113 8794 3075 8823 3073 8832 3074 8841
      3074 8889
TIME...MOT...LOC 1940Z 272DEG 17KT 3124 8813 3094 8839 3076 8871 3048
8885

HAIL...<.75IN
WIND...60MPH
 
$$

Butts
955 
WWUS54 KMOB 301958
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
258 PM CDT SUN APR 30 2017

ALC025-097-129-MSC039-041-302007-
/O.EXP.KMOB.SV.W.0153.000000T0000Z-170430T2000Z/
Mobile AL-Washington AL-Clarke AL-George MS-Greene MS-
258 PM CDT SUN APR 30 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MOBILE...SOUTHERN
WASHINGTON...SOUTH CENTRAL CLARKE...GEORGE AND SOUTHEASTERN GREENE
COUNTIES WILL EXPIRE AT 300 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However gusty winds
and heavy rain are still possible with these thunderstorms.

A tornado watch remains in effect until 300 PM CDT for southeastern 
Mississippi. A tornado watch also remains in effect until 700 PM CDT 
for southwestern Alabama.

Additional statements will be issued as conditions warrant.

LAT...LON 3087 8889 3091 8885 3091 8883 3093 8883
      3096 8881 3098 8869 3113 8857 3127 8844
      3127 8807 3134 8778 3116 8792 3116 8793
      3113 8794 3075 8823 3073 8832 3074 8841
      3074 8889
TIME...MOT...LOC 1957Z 272DEG 17KT 3124 8805 3094 8831 3076 8863 3048
8877

$$

Butts

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 30, 1:37 PM CDT, 23 minutes earlier.

Area forecast discussion, Apr 30, 1:37 PM CDT, 23 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Mobile AL
137 PM CDT Sun Apr 30 2017

Severe Weather Becoming Likely Today and Tonight...

Elevated Threat of Flash Flooding west of Interstate 65...

Coastal Hazards Persist...

.DISCUSSION...See updated information for land areas below.

&&

.UPDATE...Tornado watch 182 has been expanded eastward to include
Mobile and Baldwin counties and adjacent coastal waters of Mobile
Bay and the MS Sound thru 7 PM. Headlines updated in zones and
coastal waters forecast. /10

&&

.PREV DISCUSSION... /issued 1248 PM CDT Sun Apr 30 2017/

DISCUSSION...Updated for latest aviation discussion below.

AVIATION...
18Z issuance...MVFR ceilings will persist over the Mobile metro
area throughout the afternoon, with lower IFR ceiling conditions
expected right along the gulf coast of Florida including the PNS
terminal. A moderate to occasionaly strong southerly wind flow
will persist through the evening with sustained wind speeds of 15
to 20 knots with some gusts up to 25 to 30 knots. A wind advisory
remains in effect through this evening. Lower ceilings and
visibilities will occur in and around heavy showers and storms
effecting the TAF sites tonight. Some storms may be strong to
severe with high wind gusts to 50 knots being the main threat.
Winds begin to shift to the southwest and west and gradually
diminish along the northern gulf coast region after midnight
through early Monday morning. /22

PREV DISCUSSION... /issued 1117 AM CDT Sun Apr 30 2017/

DISCUSSION...See updated information for land areas below.

UPDATE...A large, vigorous upper level storm system centered
over the southern High Plains has placed the local area within a
zone of deep layer ascent, within an anomalously high/deeply moist
airmass (pwats ~1.7 inches) and sufficient instability. A large
area of cold cloud tops and enhanced lightning activity was
tracking eastward over central MS/to off the south Louisiana
coast. Strong low level wind profiles and curved hodographs
maintain both a damaging wind/isolated tornado wind threat.
Tornado watches continue over portions of interior southwest AL
to southeast MS. Another concern is flooding. Some slowing of the
forward motion of the convective line will likely bring increased
rain rates and isolated instances of flash flooding. Will continue
to monitor. An elevated threat of flash flooding remains
unchanged and is posted along and west of I-65. Along the coast, a
multitude of problems. Strong onshore flow and long period swell
into the surf zone supports high surf and 5 to 8 foot breakers
which can produce localized beach erosion. Coastal flooding
remains possible with 2 to 3 feet above mean sea level occurring
at time of high tide this afternoon. A high risk of dangerous to
potentially deadly rip currents also remains a threat. /10

PREV DISCUSSION... /issued 1043 AM CDT Sun Apr 30 2017/

DISCUSSION...See updated information for land areas below.

UPDATE...Tornado watch #182 has now been issued for portions of
interior southwest AL thru 7 PM. Tornado watch #181 remains in
effect for all interior southeast MS zones thru 3 PM. Zones
updated. /10

PREV DISCUSSION... /issued 746 AM CDT Sun Apr 30 2017/

DISCUSSION...See updated information for land areas below.

UPDATE...Tornado watch #181 has been issued for all interior
southeast MS zones thru 3 PM and is now headlined in zones. The
storm prediction center is considering upgrading the day1 severe
weather outlook to enhanced over the northwest portions of local
area, west of I-65. /10

PREV DISCUSSION... /issued 658 AM CDT Sun Apr 30 2017/

DISCUSSION...Updated for latest aviation discussion below.

AVIATION...
12Z issuance...Mostly MVFR cigs and visibilities through 01.00z
followed by mostly IFR cigs and visibilities through 01.12z.
Lower cigs and visibilities occur especially in and around heavy
showers and thunderstorms this afternoon and tonight. Some storms
may be strong to severe through this evening resulting in winds
from 35 to 65 knots. Outside of showers and thunderstorms expect a
strong southerly wind flow at 15 to 25 knots with frequent gusts
to 30 to 34 knots. With this a wind advisory is also in effect
through this evening. Winds begin to shift to the southwest and
west and gradually diminish generally after 01.09z. 32/ee

PREV DISCUSSION... /issued 506 AM CDT Sun Apr 30 2017/

NEAR TERM /Now Through Sunday night/...Early morning water vapor
animation and 500 mb height analysis show a deep upper level low
spinning in the vicinity of the TX/OK Panhandles early this morning,
while surface analysis shows the associated surface cold front
moving eastward across far western portions of AR/LA and into the
adjacent far northwestern Gulf of Mexico. Satellite, radar, and
lightning data show numerous to widespread showers and thunderstorms
developing across much of LA and AR and into the Mid-Mississippi
Valley region early this morning within the deeply moist and
diffluent flow pattern aloft ahead of the upper level low.
Conditions are relatively quiet for the time being across our
forecast area as of 4 A.M. CDT, with areas of low stratus spreading
across the region in the warm and moist low level flow environment
ahead of the upper storm system and associated cold front. Winds are
still a little breezy at times near the immediate coast.

The deep upper level low is forecast to eject northeastward across
northern OK/southern KS this morning, before continuing to lift
toward the Upper Midwestern states this evening into late tonight.
The associated surface cold front will continue to push eastward
toward the Mississippi River through the morning, then continue to
progress across MS/LA this afternoon, before finally pushing across
our forecast area this evening through late tonight. The latest
short range model guidance, along with the WRF-ARW and past few runs
of the HRRR lend confidence that the organizing squall line over
LA/AR early this morning will continue to spread eastward across
southeast LA and central MS by mid to late morning, before entering
our southeast MS counties by early this afternoon (perhaps around 1-
2 PM). A gradual eastward progression into southwest AL should then
continue through the rest of the afternoon. Isolated to scattered
showers and thunderstorms may also develop ahead of the main line.
We will have POPs quickly trending up to the likely to categorical
range across southeast MS and southwest AL this afternoon, with
slight chance to chance POPs farther east over the rest of the CWA.
Shear and instability parameters remain favorable for embedded
storms along the line to become severe this afternoon with a 40-50
knot low level jet ahead of and along the line, along with up to
1500-2500 J/KG MLCAPE. RAP forecast soundings also show some
curvature to the hodographs along with quite steep mid level lapse
rates (7.5-8 C/KM) within an elevated mixed layer. Therefore all
modes of severe weather are possible today, including damaging winds
over 60 mph, large hail and a few tornadoes.

The line should make eastward progress toward the I-65 corridor late
this afternoon into early this evening, and some of the embedded
storms could continue become severe into south central AL and the
northwest FL Panhandle. We will also need to watch for a potential
re-developing round of strong to severe severe storms back over
southeast MS and southwest AL this evening ahead of the approaching
cold front, so will continue to mention severe potential through the
evening hours, while keeping POPs categorical. The severe risk may
begin to decrease/become more marginal after midnight as stronger
low level flow shifts east of the region, but still may have to
monitor for a few strong storms through the night.

Heavy rainfall will also be a concern today and tonight as very rich
moisture (precipitable water values increasing to around or just
above 2") will promote efficient rainfall producing storms. The
latest short term model guidance as well as guidance from WPC
continues to show the potential for heaviest rain roughly west of
the I-65 corridor, where storm total amounts of 2-4 inches with
locally higher amounts still look quite possible. Will have to
closely monitor for additional heavy rainfall as additional storms
develop along the front this evening/tonight following the daytime
round. Multiple rounds of heavy rain could lead to localized flash
flooding and will highlight an elevated flooding risk over our
western CWA in our local flood graphics, while keeping a limited
threat farther east for now. Highs today range from the the lower to
mid 80s inland and around 80 near the coast. Lows tonight in the
upper 50s over western areas behind the cold front, with lower to
mid 60s over eastern portions of the area.

In terms of other hazards, will continue the Wind Advisory across
the are today as southerly winds increase to 20-30 mph, with some
gusts between 35-40 mph possible in the gradient flow. The
persistent strong southerly flow, high period swell, and high tidal
ranges will continue to bring a high risk of deadly rip currents to
the local beaches through at least tonight. Surf heights are
forecast to range as high as 5-8 feet today. Minor coastal flooding
may also occur around high tide this afternoon as the persistent
southerly fetch continues, particularly in low lying areas as tides
average around 1-2 feet above predicted levels (which may equate to
the around or above 3 foot MSL range near times of high tide). /21

SHORT TERM /Monday Through Tuesday night/...A lingering chance of
showers and thunderstorms will continue Monday morning in the
eastern zones before a cooler and drier airmass spreads across the
region behind the passing cold front. Clouds decrease through the
day with mostly clear skies expected by Monday night. Highs Monday
should range in the mid to upper 70s with lows Monday night
noticeably cooler in the lower to mid 50s inland with readings
around 60 near the immediate coast. /21

By early tue main upper tough/upper low shifts north to the
western Great Lakes region leading to mostly a zonal flow aloft
across much of the deep south Tuesday and Tuesday night. At the
surface high pressure builds from the west settling over the north
central gulf states and forecast area Tuesday and Tuesday night
leading to mostly sunny skies during the day on Tuesday and clear
skies Tuesday night. With plenty of sunshine expected on Tuesday
along with drier air advecting in from the west and northwest
daytime highs will climb to the lower to middle 80s for most
inland areas and the upper 70s to lower 80s closer to the coast.
With the drier air advecting across the region humidity levels
during the day on Tue will also range from the 25 to 35 percent.

LONG TERM /Wednesday Through Saturday/...By early Wed morning
next mid to upper trof begins to approach the central plains from
the west then digs across the central and lower plain states and
the Mississippi river valley late Wed night through Thu evening,
then lifting north northeast across the the Mid Atlantic and New
England States Fri Night and Sat. Scattered to numerous showers
and thunderstorms are expected ahead of this system with the best
coverage over the western half of the forecast area on Wed and
Wed night then shifting over remaining areas during the day on
Thu. By late Thu and into Thu night a strong cold front moves
across the region ushering in much drier and cooler air across the
forecast area both Fri and Sat. At this time no significant
threat of severe weather is expected but these will be a chance
for some excessive rainfall possibly leading to some localized
flooding especially in areas with low terrain and poor drainage
occurring mostly on Thu. As a result will continue to monitor
this upcoming situation closely for excessive rainfall later in
the week. Ahead of the front daytime temps on Wed will climb to
the lower to middle 80s for most inland areas and the upper 70s to
lower 80s closer to the coast. In the wake of the front daytime
temps will climb to the middle 70s for all locations on Thu, lower
70s on Fri, then rebound to the middle 70s on Sat. Lows Wed night
will range from the lower to middle 60s, mid to upper 50s inland
and around 60 near the coast Thu night, and the upper 40s to lower
50s inland, and the middle 50s near the coast Fri night. 32/ee

MARINE...A strong onshore flow will continue ahead of an
approaching storm system and cold front through tonight, and Small
Craft Advisories remain in effect through late tonight. Adverse
conditions are expected later today through early Monday morning as
a strong storm system brings the possibility of strong to severe
thunderstorms ahead of the front. The front should move east of the
region Monday, allowing conditions to gradually improve. Expect
diminishing offshore winds and subsiding seas for Monday and
Tuesday. An onshore flow will strengthen during the middle to latter
part of the week as another storm system approaches from the west.
/21

&&

.MOB WATCHES/WARNINGS/ADVISORIES...
AL...Wind Advisory until 9 PM CDT this evening for ALZ051>054.

     Wind Advisory until midnight CDT tonight for ALZ055>060-261>266.

     Coastal Flood Advisory until 4 AM CDT Monday for ALZ263>266.

     High Rip Current Risk through late tonight for ALZ265-266.

     High Surf Advisory until 4 AM CDT Monday for ALZ265-266.

FL...Wind Advisory until midnight CDT tonight for FLZ201>206.

     Coastal Flood Advisory until 4 AM CDT Monday for FLZ202-204-206.

     High Rip Current Risk through late tonight for FLZ202-204-206.

     High Surf Advisory until 4 AM CDT Monday for FLZ202-204-206.

MS...Wind Advisory until 9 PM CDT this evening for MSZ067-075-076-078-
     079.

GM...Small Craft Advisory until 7 AM CDT Monday for GMZ650-655-670-
     675.

     Small Craft Advisory until 4 AM CDT Monday for GMZ630>635.

&&

This product is also available on the web at:
http://weather.gov/mob
Hazardous weather outlook, Apr 30, 5:59 AM CDT, 8 hours 1 minute before
Hazardous Weather Outlook
National Weather Service Mobile AL
559 AM CDT Sun Apr 30 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-
559 AM CDT Sun Apr 30 2017

This Hazardous Weather Outlook is for portions of south central
Alabama...southwest Alabama...northwest Florida and southeast
Mississippi.

.DAY ONE...Today and Tonight

Severe thunderstorms will be possible across much of the region
today and tonight, with a potential for multiple rounds of storms
to impact the area starting around noon or early this afternoon
and continuing through late tonight. Damaging winds, large hail
and a few tornadoes will all be possible.

Heavy rainfall will be possible today and tonight as multiple
rounds of storms move across the region, which could result in
flooding of low lying and poor drainage areas. Isolated instances
of flash flooding may also occur, particularly west of Interstate
65 where it currently appears there is a better potential for
heavier rainfall through tonight.

Wind speeds of 25 to 30 mph, with frequent gusts between 30 and
40 mph, are expected outside of thunderstorms through this
evening. A Wind Advisory remains in effect for the entire area
today through this evening.

High surf and a high risk of rip currents will continue along
area beaches through late tonight. Minor coastal flooding is
possible today, particularly during the time of high tide this
afternoon.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Another approaching storm system could bring another round of
showers and thunderstorms, a few of which could be strong with
locally heavy rainfall late Wednesday into Thursday.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation may be requested today and tonight.

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-
559 AM CDT Sun Apr 30 2017

This Hazardous Weather Outlook is for portions of the coastal
waters of Alabama and northwest Florida.

.DAY ONE...Today and Tonight

Small craft advisories remain in effect through tonight as strong
southerly flow and increased seas continue in advance of an
approaching cold front.

Severe thunderstorms will be possible this afternoon through
early Monday as a storm system moves across the region.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Showers and thunderstorms are expected to return late Wednesday
and Thursday as another storm system moves across the area.

Increasing onshore flow could bring hazardous conditions for small
craft again late Wednesday into Thursday.

In the hours before

Special weather statement, Apr 30, 11:20 AM CDT, 2 hours 40 minutes before
Special Weather Statement
National Weather Service Mobile AL
1120 AM CDT SUN APR 30 2017

ALZ051-MSZ067-075-076-078-079-301715-
Choctaw AL-Perry MS-Stone MS-Greene MS-Wayne MS-George MS-
1120 AM CDT SUN APR 30 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...GEORGE...PERRY...WAYNE...GREENE AND STONE COUNTIES UNTIL
1215 PM CDT...

At 1119 AM CDT, the strong thunderstorms were located along a line
extending from Goodwater to near Rock Hill to near Mcneil, and
moving northeast at 40 mph.

Half inch hail and winds of 40 to 50 mph will be possible with these
storms.

Locations impacted include...
Waynesboro, Wiggins, Lucedale, Richton, Leakesville, Clara,
Perkinston, McHenry, Beaumont, New Augusta, McLain, State Line and
Buckatunna.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

Additional statements will be issued as conditions warrant.

&&

A tornado watch remains in effect until 300 PM CDT for southeastern
Mississippi. A tornado watch also remains in effect until 700 PM CDT
for southwestern Alabama.

LAT...LON 3091 8934 3091 8914 3143 8915 3143 8894
      3182 8894 3189 8848 3195 8847 3074 8842
      3073 8888 3068 8889 3068 8924 3065 8925
      3065 8934
TIME...MOT...LOC 1619Z 240DEG 34KT 3192 8889 3113 8930 3062 8968

Butts
Special weather statement, Apr 30, 12:02 PM CDT, 1 hour 58 minutes before
Special Weather Statement
National Weather Service Mobile AL
1202 PM CDT SUN APR 30 2017

ALZ051-301800-
Choctaw AL-
1202 PM CDT SUN APR 30 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...CHOCTAW COUNTY UNTIL 100 PM CDT...

At 1202 PM CDT, the strong thunderstorms were located along a line
extending from 6 miles southeast of York to 9 miles southwest of
Crandall, and moving northeast at 55 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Butler, Lisman, Pennington and Toxey.

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.

Additional statements will be issued as conditions warrant.

&&

A tornado watch remains in effect until 700 PM CDT for southwestern
Alabama.

LAT...LON 3231 8793 3228 8793 3230 8794 3230 8798
      3228 8802 3218 8801 3214 8804 3211 8805
      3209 8805 3207 8810 3205 8812 3201 8812
      3198 8807 3196 8807 3197 8809 3195 8812
      3193 8810 3186 8847 3231 8842
TIME...MOT...LOC 1702Z 237DEG 48KT 3242 8822 3186 8861

Butts

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 11:20 AM CDTSpecial Weather StatementMOBGeorge, Greene, Perry, Stone, Wayne55 min
Apr 30, 11:34 AM CDTSevere Thunderstorm WarningMOBGreene, Perry, Wayne41 min
Apr 30, 12:16 PM CDTSevere Thunderstorm WarningMOBGeorge, Greene, Perry, Stone44 min
Apr 30, 12:46 PM CDTAreal Flood AdvisoryMOBGeorge, Greene, Perry, Stone, Wayne3 hr
Apr 30, 1:02 PM CDTSevere Thunderstorm WarningMOBGeorge, Greene, Perry, Stone58 min
Apr 30, 1:06 PM CDTSevere Thunderstorm WarningMOBWayne39 min
Apr 30, 1:46 PM CDTSevere Thunderstorm WarningMOBGreene, Wayne59 min
Apr 30, 4:09 PM CDTAreal Flood AdvisoryMOBGeorge3 hr
Apr 30, 6:17 PM CDTFlash Flood WatchMOBGeorge, Greene9 hr
Apr 30, 12:02 PM CDTSpecial Weather StatementMOBChoctaw58 min
Apr 30, 2:50 PM CDTSpecial Weather StatementMOBWilcox40 min
Apr 30, 3:03 PM CDTSpecial Weather StatementMOBMobile57 min
Apr 30, 3:14 PM CDTAreal Flood AdvisoryMOBClarke, Mobile, Washington, Wilcox3 hr
Apr 30, 3:56 PM CDTSpecial Weather StatementMOBMobile, Monroe64 min
Apr 30, 4:01 PM CDTSpecial Marine WarningMOB89 min
Apr 30, 4:24 PM CDTSpecial Weather StatementMOBEscambia51 min
Apr 30, 4:43 PM CDTSpecial Weather StatementMOBBaldwin, Mobile62 min
Apr 30, 5:23 PM CDTSpecial Marine WarningMOB52 min
Apr 30, 5:38 PM CDTSpecial Weather StatementMOBBaldwin67 min
Apr 30, 5:48 PM CDTSpecial Weather StatementMOBButler42 min
Apr 30, 5:49 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia41 min
Apr 30, 6:10 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia35 min
Apr 30, 6:15 PM CDTSpecial Marine WarningMOB90 min
Apr 30, 6:23 PM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Apr 30, 6:37 PM CDTSpecial Weather StatementMOBConecuh, Escambia53 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2017Severe Thunderstorm Warnings in Alabama, 2017Every severe thunderstorm warning 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.