Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 8, NWS Jackson, MS

January 21, 20176 counties in Mississippi

NWS Jackson, MS issued this flash flood warning at Jan 21, 2017, 3:20 AM CST for 6 counties in Mississippi. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jan 21, 2017, 3:20 AM CST (09:20 UTC)
Expired: Jan 21, 2017, 6:15 AM CST
In force: 3 hr
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Adams County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Jefferson County, MS, Lincoln County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 94 km from the middle of the area, began a volume at 09:23 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

Jackson, MS (KJAN), launched 00:00Z, 9.3 hours before the alert went out and 92 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1897 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

089 
WGUS54 KJAN 210920
FFWJAN
MSC001-021-029-037-063-085-211215-
/O.NEW.KJAN.FF.W.0008.170121T0920Z-170121T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
320 AM CST SAT JAN 21 2017

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Copiah County in central Mississippi...
  Franklin County in southwestern Mississippi...
  Northwestern Lincoln County in south central Mississippi...
  Southeastern Claiborne County in southwestern Mississippi...
  East central Adams County in southwestern Mississippi...
  Southeastern Jefferson County in southwestern Mississippi...

* Until 615 AM CST

* At 318 AM CST, Doppler radar indicated heavy rain across the warned
  area. Up to three inches of rain have already fallen. Flash
  flooding is already occurring in portions of northwestern Lincoln
  County.

* Some locations that will experience flooding include...
  Crystal Springs, Hazlehurst, Bude, Loyd Star, Gallman, Pleasant
  Hill, Mcbride, New Hope, Hamburg, Blue Hill, Vaughn, Dentville,
  Kingston, Union Church, Hopewell, Garden City, Barlow,
  Martinsville, Mccall Creek and Glancy.

Additional rainfall amounts of one inch are possible in the warned
area over the next two hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3137 9124 3133 9139 3205 9055 3205 9023
      3202 9024 3202 9022 3201 9023 3196 9020
      3135 9073 3135 9098 3132 9112

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 12:24 AM CST	Severe Thunderstorm Warning	JAN	Adams, Franklin	66 min
Jan 21, 12:51 AM CST	Severe Thunderstorm Warning	JAN	Adams	54 min
Jan 21, 1:19 AM CST	Severe Thunderstorm Warning	JAN	Copiah, Lincoln	56 min
Jan 21, 1:38 AM CST	Severe Thunderstorm Warning	JAN	Franklin	52 min
Jan 21, 2:02 AM CST	Severe Thunderstorm Warning	JAN	Rankin, Simpson	58 min
Jan 21, 2:22 AM CST	Severe Thunderstorm Warning	JAN	Lawrence, Lincoln	53 min
Jan 21, 2:29 AM CST	Severe Thunderstorm Warning	JAN	Covington, Jefferson Davis, Marion	61 min
Jan 21, 2:57 AM CST	Tornado Warning	JAN	Lamar, Marion	63 min
Jan 21, 3:04 AM CST	Special Weather Statement	JAN	Scott, Smith	26 min
Jan 21, 3:12 AM CST	Tornado Warning	JAN	Covington, Jasper, Jones, Smith	48 min
Jan 21, 3:26 AM CST	Special Weather Statement	JAN	Clarke	34 min
Jan 21, 3:32 AM CST	Severe Thunderstorm Warning	JAN	Jones	43 min
Jan 21, 3:36 AM CST	Tornado Warning	JAN	Forrest, Jones, Lamar	54 min
Jan 21, 3:38 AM CST	Severe Thunderstorm Warning	JAN	Jefferson Davis, Marion	25 min
Jan 21, 3:57 AM CST	Tornado Warning	JAN	Lamar	38 min
Jan 21, 4:09 AM CST	Severe Thunderstorm Warning	JAN	Jasper	51 min
Jan 21, 4:24 AM CST	Severe Thunderstorm Warning	JAN	Forrest, Jones	42 min
Jan 21, 4:24 AM CST	Tornado Warning	JAN	Clarke	41 min
Jan 21, 4:31 AM CST	Flash Flood Warning	JAN	Covington, Forrest, Jefferson Davis, Jones, Lamar, Marion	4 hr
Jan 21, 9:21 AM CST	River Flood Warning	JAN	Lawrence	4 days
Jan 21, 2:21 PM CST	River Flood Warning	JAN	Leake	4 days

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.