Alert archive / Mississippi / Special Weather Statements in 2017

Special Weather Statement, NWS Mobile, AL

July 21, 2017Wayne County, Mississippi

NWS Mobile, AL issued this special weather statement at Jul 21, 2017, 6:41 PM CDT for Wayne 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, 6:41 PM CDT (23:41 UTC)
Expired: Jul 21, 2017, 7:30 PM CDT
In force: 49 min
Issued by: NWS Mobile, AL

County Wayne County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 124 km from the middle of the area, began a volume at 23:44 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

Jackson, MS (KJAN), launched 12:00Z, 11.7 hours before the alert went out and 134 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1247 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1256 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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, 3:44 PM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, Jul 21, 3:44 PM CDT, 2 hours 57 minutes before

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Hazardous weather outlook, Jul 21, 5:20 AM CDT, 13 hours 21 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, 1:56 PM CDT, 4 hours 45 minutes before

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Special weather statement, Jul 21, 3:11 PM CDT, 3 hours 30 minutes before

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Special weather statement, Jul 21, 5:10 PM CDT, 1 hour 31 minutes before

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Special weather statement, Jul 21, 6:41 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:15 AM CDT	Special Marine Warning	MOB		60 min
Jul 21, 8:37 AM CDT	Special Marine Warning	MOB		53 min
Jul 21, 8:43 AM CDT	Special Marine Warning	MOB		62 min
Jul 21, 8:47 AM CDT	Special Weather Statement	MOB	Baldwin	43 min
Jul 21, 9:05 AM CDT	Special Marine Warning	MOB		55 min
Jul 21, 9:08 AM CDT	Special Marine Warning	MOB		67 min
Jul 21, 9:14 AM CDT	Special Weather Statement	MOB	Choctaw, Clarke	46 min
Jul 21, 9:29 AM CDT	Special Marine Warning	MOB		61 min
Jul 21, 10:08 AM CDT	Special Weather Statement	MOB	Choctaw	52 min
Jul 21, 10:19 AM CDT	Special Marine Warning	MOB		56 min
Jul 21, 11:00 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw	27 min
Jul 21, 11:44 AM CDT	Special Weather Statement	MOB	Monroe	61 min
Jul 21, 3:11 PM CDT	Special Weather Statement	MOB	Conecuh, Escambia	64 min
Jul 21, 5:10 PM CDT	Special Weather Statement	MOB	Butler	50 min
Jul 21, 1:56 PM CDT	Special Weather Statement	MOB	Greene	49 min

Nearby

Special Weather Statements in Mississippi, 2017 Every 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.