Alert archive / Mississippi / Flash Flood Watches in 2015

Flash Flood Watch 8, NWS Jackson, MS

October 31, 201527 counties in Mississippi; 9 parishes in Louisiana

NWS Jackson, MS issued this flash flood watch at Oct 31, 2015, 3:54 AM CDT for 27 counties in Mississippi; 9 parishes in Louisiana. It took effect at Oct 31, 2015, 4:00 AM CDT. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued
Oct 31, 2015, 3:54 AM CDT (08:54 UTC)
In effect from
Oct 31, 2015, 4:00 AM CDT
Expired
Nov 1, 2015, 12:00 AM CDT
In force
20 hr
Issued by
NWS Jackson, MS
Flood severity
None
All 36 counties

Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Warren County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 47 km from the middle of the area, began a volume at 08:54 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 00:00Z, 8.9 hours before the alert went out and 210 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 00:00Z on 2015-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2015-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this flash flood watch went out at Oct 30, 9:21 PM CDT, 6 hours 33 minutes earlier.

Area forecast discussion, Oct 30, 9:21 PM CDT, 6 hours 33 minutes before
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Hazardous weather outlook, Oct 30, 2:47 PM CDT, 13 hours 7 minutes before
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 31, 12:13 PM CDTSpecial Weather StatementJANClaiborne, Jefferson47 min
Oct 31, 12:15 PM CDTSpecial Weather StatementJANWarren30 min
Oct 31, 12:41 PM CDTSpecial Weather StatementJANHinds, Yazoo34 min
Oct 31, 12:44 PM CDTSpecial Weather StatementJANClaiborne31 min
Oct 31, 12:56 PM CDTTornado WarningJANFranklin49 min
Oct 31, 1:04 PM CDTSpecial Weather StatementJANCopiah26 min
Oct 31, 1:06 PM CDTSpecial Weather StatementJANMadison24 min
Oct 31, 1:38 PM CDTSevere Thunderstorm WarningJANFranklin, Lincoln52 min
Oct 31, 1:42 PM CDTSpecial Weather StatementJANAttala, Copiah, Rankin33 min
Oct 31, 2:12 PM CDTTornado WarningJANLawrence, Lincoln25 min
Oct 31, 2:16 PM CDTSpecial Weather StatementJANLeake, Scott29 min
Oct 31, 2:35 PM CDTSevere Thunderstorm WarningJANJefferson Davis, Lawrence, Lincoln40 min
Oct 31, 2:38 PM CDTSpecial Weather StatementJANScott37 min
Oct 31, 3:05 PM CDTSpecial Weather StatementJANNeshoba, Newton, Smith, Winston25 min
Oct 31, 3:10 PM CDTSevere Thunderstorm WarningJANMarion51 min
Oct 31, 3:12 PM CDTTornado WarningJANMarion40 min
Oct 31, 3:29 PM CDTSpecial Weather StatementJANJones46 min
Oct 31, 3:36 PM CDTSevere Thunderstorm WarningJANJasper, Jones39 min
Oct 31, 3:42 PM CDTSpecial Weather StatementJANLauderdale48 min
Oct 31, 3:49 PM CDTSevere Thunderstorm WarningJANCovington, Forrest, Jefferson Davis, Lamar53 min
Oct 31, 4:06 PM CDTSpecial Weather StatementJANKemper24 min
Oct 31, 4:07 PM CDTSevere Thunderstorm WarningJANForrest, Jones, Lamar38 min
Oct 31, 4:14 PM CDTSevere Thunderstorm WarningJANJasper, Jones31 min
Oct 31, 4:16 PM CDTTornado WarningJANJones29 min
Oct 31, 4:19 PM CDTTornado WarningJANForrest, Lamar29 min
Oct 31, 4:46 PM CDTSevere Thunderstorm WarningJANClarke, Jasper, Jones44 min
Oct 31, 4:47 PM CDTFlash Flood WarningJANJones118 min
Oct 31, 4:50 PM CDTSpecial Weather StatementJANForrest25 min
Oct 31, 5:14 PM CDTFlash Flood WarningJANClarke2 hr
Oct 31, 5:21 PM CDTSevere Thunderstorm WarningJANClarke, Lauderdale24 min
Oct 31, 8:50 AM CDTSpecial Weather StatementJANCatahoula25 min
Oct 31, 10:24 AM CDTSpecial Weather StatementJANCatahoula36 min
Oct 31, 10:32 AM CDTSpecial Weather StatementJANCatahoula28 min
Oct 31, 10:59 AM CDTSpecial Weather StatementJANFranklin, Madison, Tensas31 min
Oct 31, 11:39 AM CDTSpecial Weather StatementJANConcordia51 min
Oct 31, 11:48 AM CDTTornado WarningJANCatahoula, Concordia27 min

Nearby

Flash Flood Watches in Mississippi, 2015Flash Flood Watches in Louisiana, 2015Every flash flood watch in 2015

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.