Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 33, NWS Jackson, MS

April 30, 20175 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Apr 30, 2017, 9:00 AM CDT for 5 counties in Mississippi. It was in force for 3 hr. 5 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: Apr 30, 2017, 9:00 AM CDT (14:00 UTC)
Expired: Apr 30, 2017, 12:00 PM CDT
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Humphreys County, MS, Issaquena County, MS, Sharkey County, MS, Warren County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 83 km from the middle of the area, began a volume at 14:04 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

Time	Report	Where	Remark
Apr 30, 9:00 AM CDT	FLASH FLOOD	3 Ene Vicksburg, MS	ONGOING FLASH FLOODING ALONG HWY 27 SOUTH.
Apr 30, 9:00 AM CDT	FLASH FLOOD	3 N Vicksburg, MS	FLASH FLOODING ONGOING ALONG NORTH WASHINGTON STREET.
Apr 30, 9:00 AM CDT	FLASH FLOOD	6 Ne Vicksburg, MS	ONGOING FLASH FLOODING ALONG OAKRIDGE ROAD.
Apr 30, 9:00 AM CDT	HEAVY RAIN 2.24	9 N Vicksburg, MS	24 HOUR RAINFALL AS OF 9 AM AT SBSM6 RIVER GAUGE.
Apr 30, 9:22 AM CDT	FLASH FLOOD	1 Ese Bentonia, MS	FLASH FLOODING AFFECTING THE ENTIRE BENTONIA COMMUNITY. HIGHWAY 49 WAS UNDER WATER. HIGHWAY 433 AT MARTIN ROAD WAS FLOODED.

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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 2.0 hours before the alert went out and 73 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: 647 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 398 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

566 
WGUS54 KJAN 301400
FFWJAN
MSC053-055-125-149-163-301700-
/O.NEW.KJAN.FF.W.0033.170430T1400Z-170430T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Warren County in west central Mississippi...
  Yazoo County in central Mississippi...
  Southeastern Issaquena County in west central Mississippi...
  Humphreys County in central Mississippi...
  Southeastern Sharkey County in west central Mississippi...

* Until noon CDT

* At 857 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Vicksburg, Yazoo City, Belzoni, Redwood, Valley Park, Benton,
  Isola, Bovina, Le Tourneau, Flowers, Myrleville, Holly Bluff,
  Phoenix, Eagle Bend, Tinsley, Midnight, Oak Ridge, Little Yazoo,
  Bentonia and Silver City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3324 9037 3331 9034 3314 9033 3311 9043
      3305 9043 3288 8997 3266 9020 3250 9059
      3214 9083 3224 9105 3223 9100 3237 9087
      3235 9099 3244 9097 3246 9109 3249 9099
      3253 9105 3310 9068 3326 9073 3333 9045

$$

JM

1 follow-up statement

931 
WGUS74 KJAN 301423
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
923 AM CDT SUN APR 30 2017

MSC053-055-125-149-163-301700-
/O.CON.KJAN.FF.W.0033.000000T0000Z-170430T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren MS-Yazoo MS-Issaquena MS-Humphreys MS-Sharkey MS-
923 AM CDT SUN APR 30 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR
WARREN...YAZOO...SOUTHEASTERN ISSAQUENA...HUMPHREYS AND SOUTHEASTERN
SHARKEY COUNTIES...

At 922 AM CDT, local law enforcement reported flash flooding in 
Vicksburg and Bentonia. Up to three inches of rain have already 
fallen. Flash flooding is already occurring.

Some locations that will experience flooding include...
Vicksburg, Yazoo City, Belzoni, Redwood, Valley Park, Benton, Isola,
Bovina, Le Tourneau, Flowers, Myrleville, Holly Bluff, Phoenix, Eagle
Bend, Tinsley, Midnight, Oak Ridge, Little Yazoo, Bentonia and Silver
City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3324 9037 3331 9034 3314 9033 3311 9043
      3305 9043 3288 8997 3266 9020 3250 9059
      3214 9083 3224 9105 3223 9100 3237 9087
      3235 9099 3244 9097 3246 9109 3249 9099
      3253 9105 3310 9068 3326 9073 3333 9045

$$

JM

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, 9:05 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, 11:12 AM CDT	Flash Flood Warning	JAN	Covington, Forrest, Jones, Lamar, Marion	3 hr
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; radar from the NEXRAD Level II archive.