Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 4, NWS Jackson, MS

January 19, 2017Simpson County, Smith County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jan 19, 2017, 9:01 AM CST for Simpson County, Smith County, 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: Jan 19, 2017, 9:01 AM CST (15:01 UTC)
Expired: Jan 19, 2017, 12:00 PM CST
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Simpson County, MS, Smith County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 40 km from the middle of the area, began a volume at 15:04 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
Jan 19, 9:30 AM CST	FLASH FLOOD	3 Wnw Burns, MS	WATER WAS OBSERVED ACROSS THE ROAD ON HIGHWAY 481.

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, 3.0 hours before the alert went out and 44 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: 281 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 530 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

870 
WGUS54 KJAN 191501
FFWJAN
MSC127-129-191800-
/O.NEW.KJAN.FF.W.0004.170119T1501Z-170119T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
901 AM CST THU JAN 19 2017

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Simpson County in central Mississippi...
  Western Smith County in central Mississippi...

* Until noon CST

* At 859 AM CST, 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...
  Magee, Mendenhall, Pinola, Union, Burns, White Oak, Martinville,
  Shivers, Sanatorium, Harrisville, Polkville, D'Lo and Braxton.

Additional rainfall amounts of near 2 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 3179 9011 3180 9015 3182 9013 3183 9013
      3184 9016 3186 9013 3189 9014 3191 9017
      3193 9017 3194 9020 3195 9019 3201 9023
      3202 9022 3202 9024 3205 9023 3205 8973
      3222 8973 3222 8943 3179 8966 3175 9012

$$

17

1 follow-up statement

519 
WGUS74 KJAN 191619
FFSJAN

Flash Flood Statement
National Weather Service Jackson MS
1019 AM CST THU JAN 19 2017

MSC127-129-191800-
/O.CON.KJAN.FF.W.0004.000000T0000Z-170119T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Simpson MS-Smith MS-
1019 AM CST THU JAN 19 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CST FOR
SIMPSON AND WESTERN SMITH COUNTIES...

At 1017 AM CST, emergency management reported water on Highway 481
west northwest of Burns. Up to three inches of rain have already
fallen. Flash flooding is already occurring.

Some locations that will experience flooding include...
Magee, Mendenhall, Pinola, Union, Burns, White Oak, Martinville,
Shivers, Sanatorium, Harrisville, Polkville, D'Lo and Braxton.

Additional rainfall amounts of around 1 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 3179 9011 3180 9015 3182 9013 3183 9013
      3184 9016 3186 9013 3189 9014 3191 9017
      3193 9017 3194 9020 3195 9019 3201 9023
      3202 9022 3202 9024 3205 9023 3205 8973
      3222 8973 3222 8943 3179 8966 3175 9012

$$

17

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 19, 4:57 AM CST	Special Weather Statement	JAN	Lincoln	33 min
Jan 19, 5:14 AM CST	Severe Thunderstorm Warning	JAN	Franklin, Lincoln	46 min
Jan 19, 6:27 AM CST	Tornado Warning	JAN	Copiah	31 min
Jan 19, 7:20 AM CST	Flash Flood Warning	JAN	Copiah	3 hr
Jan 19, 7:23 AM CST	Flash Flood Warning	JAN	Franklin, Jefferson, Lincoln	3 hr
Jan 19, 7:43 AM CST	Tornado Warning	JAN	Simpson, Smith	62 min
Jan 19, 8:32 AM CST	Special Weather Statement	JAN	Lawrence	28 min
Jan 19, 8:41 AM CST	Tornado Warning	JAN	Scott, Smith	37 min
Jan 19, 10:46 AM CST	Flash Flood Warning	JAN	Franklin	6 hr
Jan 19, 11:08 AM CST	Flash Flood Warning	JAN	Copiah, Franklin, Jefferson, Lincoln	3 hr
Jan 19, 12:34 PM CST	Flash Flood Warning	JAN	Franklin	3 hr
Jan 19, 4:29 PM CST	Special Weather Statement	JAN	Madison, Rankin	31 min
Jan 19, 4:39 PM CST	Tornado Warning	JAN	Hinds, Madison, Rankin	27 min
Jan 19, 4:51 PM CST	Severe Thunderstorm Warning	JAN	Attala, Holmes, Leake, Madison, Rankin, Scott	30 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.