Alert archive / Mississippi / Flash Flood Warnings in 1999

Flash Flood Warning 2, NWS New Orleans, LA

March 13, 1999Pike County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Mar 13, 1999, 12:22 PM CST for Pike County, Mississippi. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 13, 1999, 12:22 PM CST (18:22 UTC)
Expired: Mar 13, 1999, 2:25 PM CST
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

County Pike County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.4 hours before the alert went out and 123 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: 553 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 514 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 406 m²/s²
0-3 km storm-relative helicity: 553 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNEW 131821
FFWNEW
MSC113-132025-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1222 PM CST SAT MAR 13 1999

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A...

* FLASH FLOOD WARNING FOR
   - PIKE COUNTY IN SOUTHERN MISSISSIPPI

* UNTIL 225 PM CST

* AT 1215 PM...REPORTS HAVE BEEN RECEIVED FROM LAW ENFORCEMENT AND
  COUNTY EMERGENCY MANAGEMENT OFFICIALS OF FLOODING IN THE MCCOMB
  MISSISSIPPI AREA. WIDESPREAD STREET FLOODING WAS OCCURRING IN
  URBAN AREAS ALONG WITH HOMES BEING THREATENED IN MCCOMB.

 ADDITIONAL RAINFALL OF 2 TO 4 INCHES IS POSSIBLE THROUGH THE
 REMAINDER OF THE AFTERNOON WHICH WILL INCREASE THE DANGER OF FLASH
 FLOODING IN THE PIKE COUNTY AREA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  IF YOU OBSERVE RISING WATER MOVE TO HIGHER
GROUND.

What forecasters said that day

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

In the hours before

Special weather statement, Mar 13, 10:05 AM CST, 2 hours 17 minutes before

LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-132301-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1005 AM CST SAT MAR 13 1999

...A TORNADO WATCH IS IN EFFECT FOR SOUTHEAST LOUISIANA AND SOUTH
MISSISSIPPI UNTIL 4 PM CST...

...A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST LOUISIANA AND
SOUTH MISSISSIPPI FOR TODAY...

A LARGE SLOW MOVING UPPER LEVEL DISTURBANCE AND COLD FRONT WILL MOVE
ACROSS SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI THIS AFTERNOON.
THE UPPER LEVEL DISTURBANCE IS PROVIDING A VERY FAVORABLE SETUP FOR
SEVERE THUNDERSTORMS AND HEAVY RAIN TODAY.  IN ADDITION...BECAUSE
THE ATMOSPHERE IS SO MOIST AND UNSTABLE...AND THE LOW AND MIDDLE
LEVEL WINDS PATTERN ARE FAVORABLE FOR SEVERE THUNDERSTORMS. SOME
OF THESE THUNDERSTORMS COULD PRODUCE STRONG WINDS DAMAGING WINDS...
LARGE HAIL AND TORNADOES. 2 TO 3 OF RAIN COULD FALL WITHIN A FEW
HOURS PRODUCING SOME FLASH FLOODING OF HIGHWAYS.

PEOPLE ARE URGED TO FOLLOW THE WEATHER CLOSELY TODAY AND BE PREPARED
TO TAKE QUICK PROTECTIVE ACTION IF A SEVERE THUNDERSTORM...TORNADO
OR FLASH FLOOD WARNING IS POSTED FOR THEIR PARISH OR COUNTY.

FOR MORE WEATHER INFORMATION...PLEASE VISIT OUR HOMEPAGE AT
HTTP://WWW.SRH.NOAA.GOV/LIX  (ALL LOWER CASE).

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 13, 9:38 AM CST	Severe Thunderstorm Warning	LIX	Wilkinson	32 min
Mar 13, 9:58 AM CST	Severe Thunderstorm Warning	LIX	Amite	47 min
Mar 13, 10:13 AM CST	Tornado Warning	LIX	Amite	37 min
Mar 13, 11:31 AM CST	Severe Thunderstorm Warning	LIX	Pike	34 min
Mar 13, 11:37 AM CST	Severe Thunderstorm Warning	LIX	Walthall	33 min
Mar 13, 2:16 PM CST	Flash Flood Warning	LIX	Pike	74 min

Nearby

Flash Flood Warnings in Mississippi, 1999 Every flash flood warning in 1999

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.