Alert archive / Mississippi / Special Weather Statements in 2017

Special Weather Statement, NWS Mobile, AL

May 21, 2017Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this special weather statement at May 21, 2017, 5:59 PM CDT for Perry County, Wayne County, Mississippi. It was in force for 46 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
May 21, 2017, 5:59 PM CDT (22:59 UTC)
Expired
May 21, 2017, 6:45 PM CDT
In force
46 min
Issued by
NWS Mobile, AL

Counties Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 89 km from the middle of the area, began a volume at 23:03 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, 11.0 hours before the alert went out and 124 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 2017-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2627 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 2017-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
2627 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
556 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.7

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 May 21, 4:51 PM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, May 21, 4:51 PM CDT, 1 hour 8 minutes before
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Hazardous weather outlook, May 21, 5:01 PM CDT, 58 minutes before
Hazardous Weather Outlook
National Weather Service Mobile AL
501 PM CDT Sun May 21 2017

ALZ051>060-261>266-FLZ201>206-MSZ067-075-076-078-079-222215-
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-
501 PM CDT Sun May 21 2017

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

.DAY ONE...Tonight

Thunderstorms are possible tonight. An isolated strong to severe
storm is possible with the main threat being strong to damaging
winds. Organized severe weather is not expected.

Additional rain may again cause localized nuisance to minor
flooding.

A high risk of rip currents for area beaches remains in effect
through tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A Flash Flood Watch is in effect Monday afternoon through
Wednesday morning. Multiple rounds of widespread to numerous
showers and storms are expected through Wednesday. Rainfall
totals of 3 to 4 inches with locally higher amounts are possible.
This additional rainfall will likely exacerbate the already
saturated ground across the region, which may lead to flash
flooding.

Strong to possibly severe storms are possible Monday into Monday
night with the primary threat being damaging winds.

.SPOTTER INFORMATION STATEMENT...
Activation of SkyWarn Severe Storm Spotter networks may be
necessary through Saturday.

GMZ630>635-650-655-670-675-222215-
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-
501 PM CDT Sun May 21 2017

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

.DAY ONE...Tonight

Moderate winds will create hazardous conditions for small craft.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A front moving over area coastal waters on Wednesday will bring
moderate to strong offshore winds later Wednesday through
Wednesday night, again creating hazardous conditions for small
craft.

In the hours before

Special weather statement, May 21, 5:59 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
May 20, 7:06 PM CDTAreal Flood AdvisoryMOBMobile3 hr
May 20, 7:19 PM CDTSpecial Weather StatementMOBMobile41 min
May 20, 7:38 PM CDTFlash Flood WarningMOBMobile6 hr
May 20, 7:46 PM CDTSpecial Weather StatementMOBMobile44 min
May 20, 8:09 PM CDTSpecial Weather StatementMOBBaldwin, Mobile51 min
May 20, 8:12 PM CDTSpecial Weather StatementMOBBaldwin48 min
May 20, 8:17 PM CDTSpecial Marine WarningMOB88 min
May 20, 8:21 PM CDTSevere Thunderstorm WarningMOBMobile39 min
May 20, 8:25 PM CDTFlash Flood WarningMOBMobile6 hr
May 20, 8:56 PM CDTFlash Flood WatchMOBBaldwin, Escambia, Mobile7 hr
May 20, 9:02 PM CDTFlash Flood WarningMOBBaldwin, Escambia6 hr
May 20, 9:07 PM CDTSpecial Weather StatementMOBBaldwin, Escambia53 min
May 20, 9:23 PM CDTSpecial Marine WarningMOB52 min
May 20, 9:26 PM CDTSpecial Marine WarningMOB2 hr
May 20, 10:21 PM CDTAreal Flood AdvisoryMOBBaldwin, Conecuh, Covington, Escambia3 hr
May 20, 10:25 PM CDTSpecial Weather StatementMOBCovington65 min
May 20, 10:34 PM CDTSpecial Marine WarningMOB116 min
May 20, 10:58 PM CDTSevere Thunderstorm WarningMOBCovington47 min
May 20, 11:14 PM CDTAreal Flood AdvisoryMOBCovington, Crenshaw3 hr
May 20, 11:40 PM CDTSpecial Marine WarningMOB2 hr
May 20, 11:59 PM CDTAreal Flood WarningMOBBaldwin, Clarke, Mobile, Washington12 hr
May 21, 12:18 AM CDTSpecial Marine WarningMOB57 min
May 21, 1:30 AM CDTAreal Flood WarningMOBMobile12 hr
May 21, 1:55 AM CDTSpecial Marine WarningMOB95 min
May 21, 3:21 PM CDTFlash Flood WatchMOBBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more47 hr
May 20, 10:17 PM CDTSevere Thunderstorm WarningMOBOkaloosa43 min
May 20, 11:30 PM CDTFlash Flood WarningMOBOkaloosa, Santa Rosa6 hr
May 20, 7:59 PM CDTAreal Flood AdvisoryMOBGeorge, Stone3 hr

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.