Alert archive / Mississippi / Special Weather Statements in 2017

Special Weather Statement, NWS Mobile, AL

July 21, 2017Greene County, Mississippi

NWS Mobile, AL issued this special weather statement at Jul 21, 2017, 1:56 PM CDT for Greene County, Mississippi. It was in force for 49 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
Jul 21, 2017, 1:56 PM CDT (18:56 UTC)
Expired
Jul 21, 2017, 2:45 PM CDT
In force
49 min
Issued by
NWS Mobile, AL

County Greene County, MS

The radar

The Mobile radar (KMOB), 53 km from the middle of the area, began a volume at 18:55 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.9 hours before the alert went out and 149 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 2017-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1790 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2017-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.193958Sfc1 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
1790 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

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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 Jul 21, 12:31 PM CDT, 1 hour 25 minutes earlier.

Area forecast discussion, Jul 21, 12:31 PM CDT, 1 hour 25 minutes before
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Hazardous weather outlook, Jul 21, 5:20 AM CDT, 8 hours 36 minutes before
Hazardous Weather Outlook...CORRECTED
National Weather Service Mobile AL
520 AM CDT Fri Jul 21 2017

ALZ051>060-261>266-FLZ201>206-MSZ067-075-076-078-079-221030-
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-
520 AM CDT Fri Jul 21 2017

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

.DAY ONE...Today and Tonight

Gusty winds, frequent lightning, and locally heavy rains will be
possible with the stronger thunderstorms that develop today into
this evening.

Heat indices of 100 to 107 are expected today.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Gusty winds, frequent lightning, and locally heavy rains will be
possible with the stronger thunderstorms that develop each day.

Heat indices of 100 to 107 are expected each afternoon through the
period.

.SPOTTER INFORMATION STATEMENT...

Activation of SkyWarn Severe Storm Spotter networks is not
expected through Thursday.

GMZ630>635-650-655-670-675-221030-
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-
520 AM CDT Fri Jul 21 2017

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

.DAY ONE...Today and Tonight

Isolated to scattered thunderstorms are expected today and
tonight. A few storms will be capable of producing frequent
lightning, gusty winds and locally higher seas, locally heavy
rainfall, and possibly an isolated waterspout.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Gusty winds, frequent lightning and locally higher seas are
possible with the stronger storms that develop through the
period. Isolated waterspouts will also be possible mainly during
the morning hours.

In the hours before

Special weather statement, Jul 21, 8:47 AM CDT, 5 hours 9 minutes before
Special Weather Statement
National Weather Service Mobile AL
847 AM CDT FRI JUL 21 2017

ALZ263>266-211430-
Mobile Coastal AL-Baldwin Coastal AL-Baldwin Central AL-
Mobile Central AL-
847 AM CDT FRI JUL 21 2017

...A gust front from strong THUNDERSTORMS offshore WILL AFFECT THE
FOLLOWING COUNTIES...SOUTH CENTRAL MOBILE AND SOUTHWESTERN BALDWIN
COUNTIES UNTIL 930 AM CDT...

At 846 AM CDT, the gust front was located along a line extending
from near Foley to 10 miles southwest of Coden, and moving northwest
at 30 mph.

Winds in excess of 30 mph will be possible with these storms.

Locations impacted include...
Daphne, Tillmans Corner, Fairhope, Foley, Theodore, Orange Beach,
Spanish Fort, Robertsdale, Bayou La Batre, Point Clear, Central
Dauphin Island, Loxley, Magnolia Springs, Bon Secour, Summerdale,
Silverhill, Coden, Fort Gaines, Fort Morgan and Alabama Port.

LAT...LON 3022 8833 3066 8826 3071 8780 3027 8754
      3022 8805
TIME...MOT...LOC 1346Z 157DEG 29KT 3035 8766 3026 8833
Special weather statement, Jul 21, 9:14 AM CDT, 4 hours 42 minutes before
Special Weather Statement
National Weather Service Mobile AL
914 AM CDT FRI JUL 21 2017

ALZ051>055-MSZ067-211500-
Clarke AL-Wilcox AL-Monroe AL-Choctaw AL-Washington AL-Wayne MS-
914 AM CDT FRI JUL 21 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...NORTHWESTERN MONROE...CHOCTAW...NORTHERN WASHINGTON...
CLARKE...SOUTHWESTERN WILCOX AND NORTHERN WAYNE COUNTIES UNTIL 1000
AM CDT...

At 914 AM CDT, the strong thunderstorms were located along a line
extending from 6 miles southwest of Butler to 10 miles east of
Fulton, and moving west at 20 mph.

Winds in excess of 30 mph will be possible with these storms.

Locations impacted include...
Jackson, Thomasville, Butler, Grove Hill, Saint Stephens, Whatley,
Lisman, Millry, Silas, Coffeeville, Fulton, Gilbertown and Toxey.

LAT...LON 3214 8804 3209 8804 3205 8812 3199 8810
      3199 8774 3177 8730 3143 8770 3180 8894
      3182 8894 3185 8865 3189 8848 3222 8843
      3228 8833
TIME...MOT...LOC 1414Z 076DEG 16KT 3201 8828 3182 8755
Local storm report, Jul 21, 9:21 AM CDT, 4 hours 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
921 AM CDT FRI JUL 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0842 AM     MARINE TSTM WIND 2 E DAUPHIN ISLAND      30.25N 88.08W
07/21/2017  M42.00 MPH       MOBILE             AL   C-MAN STATION

            GUST FRONT ASSOCIATED WITH STORMS OFFSHORE PRODUCED A
            WIND GUST TO 42MPH.

0848 AM     MARINE TSTM WIND 5 ESE DAUPHIN ISLAND    30.23N 88.03W
07/21/2017  M43.00 MPH       BALDWIN            AL   C-MAN STATION

            GUST FRONT ASSOCIATED WITH STORMS OFFSHORE PRODUCED
            SEVERAL MEASURED WINDS GUSTS OF 40+MPH WITH THE HIGHEST
            GUST AT 43MPH.

&&

MB
Special weather statement, Jul 21, 10:08 AM CDT, 3 hours 48 minutes before
Special Weather Statement
National Weather Service Mobile AL
1008 AM CDT FRI JUL 21 2017

ALZ051>053-MSZ067-211600-
Clarke AL-Choctaw AL-Washington AL-Wayne MS-
1008 AM CDT FRI JUL 21 2017

...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...
CHOCTAW...NORTHWESTERN WASHINGTON...NORTHWESTERN CLARKE AND EASTERN
WAYNE COUNTIES UNTIL 1100 AM CDT...

At 1007 AM CDT, the strong thunderstorm was located 8 miles east of
Toxey, or 10 miles south of Butler, moving southwest at 35 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Waynesboro, Butler, Lisman, Millry, Buckatunna, Silas, Coffeeville,
Gilbertown and Toxey.

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.

This storm 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.

&&

LAT...LON 3208 8804 3206 8807 3207 8810 3206 8812
      3201 8811 3199 8810 3201 8809 3199 8807
      3199 8798 3181 8787 3142 8845 3183 8877
      3189 8848 3217 8844 3225 8815
TIME...MOT...LOC 1507Z 065DEG 31KT 3194 8817
Special weather statement, Jul 21, 11:44 AM CDT, 2 hours 12 minutes before
Special Weather Statement
National Weather Service Mobile AL
1144 AM CDT FRI JUL 21 2017

ALZ053-055-262-211745-
Clarke AL-Baldwin Inland AL-Monroe AL-
1144 AM CDT FRI JUL 21 2017

...STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING COUNTIES...
SOUTHWESTERN MONROE...NORTH CENTRAL BALDWIN AND SOUTHEASTERN CLARKE
COUNTIES UNTIL 1245 PM CDT...

At 1142 AM CDT, strong thunderstorms were located near Uriah, and
Frisco City, moving west at 15 mph.

Winds in excess of 30 mph will be possible with these storm.

Locations impacted include...
Uriah.

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 3157 8745 3132 8739 3121 8779 3153 8788
TIME...MOT...LOC 1642Z 077DEG 15KT 3139 8751
Special weather statement, Jul 21, 1:56 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 8:15 AM CDTSpecial Marine WarningMOB60 min
Jul 21, 8:37 AM CDTSpecial Marine WarningMOB53 min
Jul 21, 8:43 AM CDTSpecial Marine WarningMOB62 min
Jul 21, 8:47 AM CDTSpecial Weather StatementMOBBaldwin43 min
Jul 21, 9:05 AM CDTSpecial Marine WarningMOB55 min
Jul 21, 9:08 AM CDTSpecial Marine WarningMOB67 min
Jul 21, 9:14 AM CDTSpecial Weather StatementMOBChoctaw, Clarke46 min
Jul 21, 9:29 AM CDTSpecial Marine WarningMOB61 min
Jul 21, 10:08 AM CDTSpecial Weather StatementMOBChoctaw52 min
Jul 21, 10:19 AM CDTSpecial Marine WarningMOB56 min
Jul 21, 11:00 AM CDTSevere Thunderstorm WarningMOBChoctaw27 min
Jul 21, 11:44 AM CDTSpecial Weather StatementMOBMonroe61 min
Jul 21, 3:11 PM CDTSpecial Weather StatementMOBConecuh, Escambia64 min
Jul 21, 5:10 PM CDTSpecial Weather StatementMOBButler50 min
Jul 21, 6:41 PM CDTSpecial Weather StatementMOBWayne49 min

Nearby

Special Weather Statements in Mississippi, 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.