Alert archive / Mississippi / Flash Flood Watches in 2020

Flash Flood Watch 7, NWS Jackson, MS

March 3, 202027 counties in Mississippi; 5 parishes in Louisiana

NWS Jackson, MS issued this flash flood watch at Mar 3, 2020, 2:38 PM CST for 27 counties in Mississippi; 5 parishes in Louisiana. It took effect at Mar 4, 2020, 3:00 AM CST. It was in force for 27 hr.

The area

The counties it named.

The facts

Issued: Mar 3, 2020, 2:38 PM CST (20:38 UTC)
In effect from: Mar 4, 2020, 3:00 AM CST
Expired: Mar 5, 2020, 6:00 AM CST
In force: 27 hr
Issued by: NWS Jackson, MS
Flood severity: None

All 32 counties

Catahoula Parish, LA, Concordia Parish, LA, Franklin Parish, LA, Madison Parish, LA, Tensas Parish, LA, Adams County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Warren County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 37 km from the middle of the area, began a volume at 20:38 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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.6 hours before the alert went out and 194 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: 185 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 313 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this flash flood watch went out at Mar 3, 11:39 AM CST, 2 hours 59 minutes earlier.

Area forecast discussion, Mar 3, 11:39 AM CST, 2 hours 59 minutes before

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Hazardous weather outlook, Mar 3, 6:42 AM CST, 7 hours 56 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 3, 4:14 AM CST	Special Weather Statement	JAN	Kemper	46 min
Mar 3, 9:43 AM CST	River Flood Warning	JAN	Attala, Holmes	8 days
Mar 3, 10:07 AM CST	River Flood Warning	JAN	Jones	5 days
Mar 3, 10:07 AM CST	River Flood Warning	JAN	Clarke	5 days
Mar 3, 11:14 AM CST	River Flood Warning	JAN	Neshoba	21 days
Mar 3, 11:14 AM CST	River Flood Warning	JAN	Leake	10 days
Mar 3, 11:14 AM CST	River Flood Warning	JAN	Leake	5 days
Mar 3, 11:44 AM CST	River Flood Warning	JAN	Copiah, Simpson	13 days
Mar 3, 11:44 AM CST	River Flood Warning	JAN	Lawrence	15 days

Nearby

Flash Flood Watches in Mississippi, 2020 Flash Flood Watches in Louisiana, 2020 Every flash flood watch in 2020

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.