Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 36, NWS Jackson, MS

April 30, 20175 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Apr 30, 2017, 11:12 AM CDT for 5 counties in Mississippi. It was in force for 3 hr. 1 report 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: Apr 30, 2017, 11:12 AM CDT (16:12 UTC)
Expired: Apr 30, 2017, 2:15 PM CDT
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Covington County, MS, Forrest County, MS, Jones County, MS, Lamar County, MS, Marion County, MS

What was reported inside it

Time	Report	Where	Remark
Apr 30, 12:46 PM CDT	FLASH FLOOD	2 E West Hattiesburg, MS	FLOODING OCCURRED ON SOUTH 40TH STREET NEAR MANCHESTER.

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, 4.2 hours before the alert went out and 109 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: 1930 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 551 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

As transmitted.

013 
WGUS54 KJAN 301612
FFWJAN
MSC031-035-067-073-091-301915-
/O.NEW.KJAN.FF.W.0036.170430T1612Z-170430T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
1112 AM CDT SUN APR 30 2017

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Marion County in south central Mississippi...
  Northwestern Forrest County in southeastern Mississippi...
  Southern Covington County in southeastern Mississippi...
  Lamar County in southeastern Mississippi...
  Southwestern Jones County in southeastern Mississippi...

* Until 215 PM CDT

* At 1111 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Hattiesburg, Columbia, Sandy Hook, West Hattiesburg, Purvis,
  Lumberton, Sumrall, Rawls Springs, Bunker Hill, Eastabuchie,
  Pickwick, Sanford, Pinebur, Moselle, Improve and Baxterville.

Additional rainfall amounts of two inches are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3100 8950 3101 8950 3100 8983 3107 8984
      3107 8992 3113 8994 3113 8999 3139 8982
      3144 8982 3144 8959 3151 8959 3155 8962
      3157 8968 3157 8963 3153 8927 3128 8927
      3112 8935 3101 8935 3101 8942 3100 8943

$$

JM

2 follow-up statements

418 
WGUS74 KJAN 301817
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
117 PM CDT SUN APR 30 2017

MSC031-035-067-073-091-301915-
/O.CON.KJAN.FF.W.0036.000000T0000Z-170430T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Marion MS-Forrest MS-Covington MS-Lamar MS-Jones MS-
117 PM CDT SUN APR 30 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM CDT FOR
MARION...NORTHWESTERN FORREST...SOUTHERN COVINGTON...LAMAR AND
SOUTHWESTERN JONES COUNTIES...

At 115 PM CDT, Doppler radar indicated moderate to occasionally 
heavy rain falling across the warned area. Up to two inches of rain 
have already fallen and flash flooding remains possible.

Some locations that could experience flooding include...
Hattiesburg, Columbia, Sandy Hook, West Hattiesburg, Purvis,
Lumberton, Sumrall, Rawls Springs, Bunker Hill, Eastabuchie,
Pickwick, Sanford, Pinebur, Moselle, Improve and Baxterville.

Additional rainfall amounts of one inch are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3100 8950 3101 8950 3100 8983 3107 8984
      3107 8992 3113 8994 3113 8999 3139 8982
      3144 8982 3144 8959 3151 8959 3155 8962
      3157 8968 3157 8963 3153 8927 3128 8927
      3112 8935 3101 8935 3101 8942 3100 8943

$$

19

122 
WGUS74 KJAN 301915
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
215 PM CDT SUN APR 30 2017

MSC031-035-067-073-091-301922-
/O.EXP.KJAN.FF.W.0036.000000T0000Z-170430T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Marion MS-Forrest MS-Covington MS-Lamar MS-Jones MS-
215 PM CDT SUN APR 30 2017

...THE FLASH FLOOD WARNING FOR MARION...NORTHWESTERN FORREST...
SOUTHERN COVINGTON...LAMAR AND SOUTHWESTERN JONES COUNTIES WILL
EXPIRE AT 215 PM CDT... 

The heavy rain has ended.  Although light to occasionally moderate 
rain is expected for the hour over the warned area, flooding is no 
longer expected to pose a threat. Please continue to heed any 
remaining road closures.

LAT...LON 3100 8950 3101 8950 3100 8983 3107 8984
      3107 8992 3113 8994 3113 8999 3139 8982
      3144 8982 3144 8959 3151 8959 3155 8962
      3157 8968 3157 8963 3153 8927 3128 8927
      3112 8935 3101 8935 3101 8942 3100 8943

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 5:29 AM CDT	Severe Thunderstorm Warning	JAN	Adams	61 min
Apr 30, 6:10 AM CDT	Flash Flood Warning	JAN	Adams	4 hr
Apr 30, 6:14 AM CDT	Tornado Warning	JAN	Adams	34 min
Apr 30, 6:34 AM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Warren	56 min
Apr 30, 6:41 AM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Jefferson	49 min
Apr 30, 6:43 AM CDT	Tornado Warning	JAN	Warren	62 min
Apr 30, 6:50 AM CDT	Severe Thunderstorm Warning	JAN	Adams, Franklin, Jefferson	55 min
Apr 30, 7:20 AM CDT	Tornado Warning Tornado observed	JAN	Issaquena, Sharkey, Warren, Yazoo	55 min
Apr 30, 7:21 AM CDT	Tornado Warning	JAN	Claiborne, Copiah, Jefferson	39 min
Apr 30, 7:28 AM CDT	Tornado Warning	JAN	Claiborne, Hinds, Warren	62 min
Apr 30, 7:35 AM CDT	Severe Thunderstorm Warning	JAN	Copiah, Franklin, Lincoln	40 min
Apr 30, 7:56 AM CDT	Severe Thunderstorm Warning	JAN	Copiah, Hinds, Madison, Rankin, Simpson	64 min
Apr 30, 7:57 AM CDT	Tornado Warning	JAN	Hinds	48 min
Apr 30, 8:01 AM CDT	Tornado Warning	JAN	Copiah, Hinds, Rankin	44 min
Apr 30, 8:06 AM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Yazoo	54 min
Apr 30, 8:12 AM CDT	Flash Flood Warning	JAN	Franklin, Lincoln	3 hr
Apr 30, 8:13 AM CDT	Tornado Warning	JAN	Hinds, Madison, Warren, Yazoo	62 min
Apr 30, 8:20 AM CDT	Tornado Warning	JAN	Holmes, Humphreys, Yazoo	55 min
Apr 30, 8:31 AM CDT	Tornado Warning	JAN	Hinds, Madison	59 min
Apr 30, 8:59 AM CDT	Severe Thunderstorm Warning	JAN	Rankin, Scott, Simpson, Smith	61 min
Apr 30, 9:00 AM CDT	Flash Flood Warning	JAN	Humphreys, Issaquena, Sharkey, Warren, Yazoo	3 hr
Apr 30, 9:05 AM CDT	Tornado Warning Tornado observed	JAN	Attala, Holmes, Madison, Yazoo	55 min
Apr 30, 9:09 AM CDT	Severe Thunderstorm Warning	JAN	Carroll, Holmes, Humphreys, Leflore	66 min
Apr 30, 9:18 AM CDT	Tornado Warning	JAN	Scott	42 min
Apr 30, 9:30 AM CDT	Flash Flood Warning	JAN	Attala, Holmes, Humphreys, Madison	3 hr
Apr 30, 9:37 AM CDT	Tornado Warning	JAN	Carroll, Holmes, Montgomery	53 min
Apr 30, 9:48 AM CDT	Tornado Warning Tornado observed	JAN	Leake, Neshoba, Newton, Scott	57 min
Apr 30, 9:50 AM CDT	Severe Thunderstorm Warning	JAN	Grenada, Leflore	40 min
Apr 30, 9:50 AM CDT	Severe Thunderstorm Warning	JAN	Covington, Jefferson Davis, Lamar, Marion	55 min
Apr 30, 9:53 AM CDT	Severe Thunderstorm Warning	JAN	Attala, Montgomery, Webster	52 min
Apr 30, 9:54 AM CDT	Flash Flood Warning	JAN	Copiah, Covington, Jefferson Davis, Lawrence, Simpson, Smith	3 hr
Apr 30, 10:05 AM CDT	Tornado Warning	JAN	Montgomery, Webster	27 min
Apr 30, 10:07 AM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale, Neshoba, Newton	38 min
Apr 30, 10:16 AM CDT	Severe Thunderstorm Warning	JAN	Grenada, Montgomery	22 min
Apr 30, 10:22 AM CDT	Tornado Warning	JAN	Grenada	23 min
Apr 30, 10:33 AM CDT	Severe Thunderstorm Warning	JAN	Noxubee, Winston	57 min
Apr 30, 10:43 AM CDT	Severe Thunderstorm Warning	JAN	Covington, Forrest, Jones, Lamar	62 min
Apr 30, 10:45 AM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale, Noxubee	60 min
Apr 30, 10:59 AM CDT	Tornado Warning	JAN	Kemper, Noxubee	43 min
Apr 30, 11:24 AM CDT	Severe Thunderstorm Warning	JAN	Lowndes	36 min
Apr 30, 11:33 AM CDT	Flash Flood Warning	JAN	Covington, Forrest, Jones	3 hr
Apr 30, 11:42 AM CDT	Tornado Warning	JAN	Lowndes	8 min
Apr 30, 12:31 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Jones	34 min

Nearby

Flash Flood Warnings in Mississippi, 2017 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.