Alert archive / Mississippi / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 89, NWS Mobile, AL

July 31, 2018Greene County, Perry County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Jul 31, 2018, 1:36 PM CDT for Greene County, Perry County, Mississippi. It was in force for 39 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 31, 2018, 1:36 PM CDT (18:36 UTC)
Expired
Jul 31, 2018, 2:15 PM CDT
In force
39 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Greene County, MS, Perry County, MS

The radar

The Mobile radar (KMOB), 108 km from the middle of the area, began a volume at 18:38 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.

What was reported inside it

TimeReportWhereRemark
Jul 31, 1:53 PM CDTTSTM WND DMG2 Wnw New Augusta, MSSEVERAL TREES DOWN ON OLD RIVER RD NEAR NEW AUGUSTA.
Jul 31, 1:55 PM CDTTSTM WND DMG1 Wsw Richton, MSTREES DOWN ON OLD AUGUSTA ROAD NEAR CLAY HILL ROAD.
Jul 31, 1:57 PM CDTTSTM WND DMG5 Ne Richton, MSTREES DOWN ON WILL BEST ROAD OFF OF CAMP EIGHT ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.6 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2018-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2932 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 2018-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.1939Sfc1 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
2932 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
754 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
-36 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

134 
WUUS54 KMOB 311836
SVRMOB
MSC041-111-311915-
/O.NEW.KMOB.SV.W.0089.180731T1836Z-180731T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
136 PM CDT TUE JUL 31 2018

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Northern Perry County in southeastern Mississippi...
  Northwestern Greene County in southeastern Mississippi...

* Until 215 PM CDT.

* At 136 PM CDT, a severe thunderstorm was located 5 miles southeast
  of Sunrise, or 8 miles southeast of Petal, moving northeast at 15
  mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Richton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3143 8915 3143 8879 3117 8914 3119 8915
TIME...MOT...LOC 1836Z 246DEG 15KT 3125 8917 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 11:43 AM CDTSpecial Weather StatementMOBGeorge32 min
Jul 31, 1:11 PM CDTSpecial Weather StatementMOBGreene, Perry49 min
Jul 31, 1:30 PM CDTSevere Thunderstorm WarningMOBGreene, Perry45 min
Jul 31, 2:28 PM CDTSpecial Weather StatementMOBWayne47 min
Jul 31, 2:38 PM CDTAreal Flood AdvisoryMOBWayne3 hr
Jul 31, 3:04 PM CDTFlash Flood WarningMOBWayne3 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 2018Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.