Alert archive / Mississippi / Flash Flood Warnings in 2005

Flash Flood Warning 26, NWS New Orleans, LA

August 29, 20054 counties in Mississippi

NWS New Orleans, LA issued this flash flood warning at Aug 29, 2005, 4:20 PM CDT for 4 counties in Mississippi. It was in force for 4 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: Aug 29, 2005, 4:20 PM CDT (21:20 UTC)
Expired: Aug 29, 2005, 8:15 PM CDT
In force: 4 hr
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

Counties Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS

The radar

The Mobile radar (KMOB), 99 km from the middle of the area, began a volume at 21:20 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.3 hours before the alert went out and 207 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: 288 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 841 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KLIX 292122
FFWLIX
MSC045-047-059-109-300115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS-BATON ROUGE LA
ISSUED BY NATIONAL WEATHER SERVICE MOBILE AL
420 PM CDT MON AUG 29 2005

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...

  PEARL RIVER COUNTY IN SOUTHERN MISSISSIPPI
  HANCOCK COUNTY IN SOUTHERN MISSISSIPPI
  JACKSON COUNTY IN SOUTHERN MISSISSIPPI
  HARRISON COUNTY IN SOUTHERN MISSISSIPPI

* UNTIL 815 PM CDT

* AT 420 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS AND SPOTTERS       
  ACROSS THE WARNED AREA CONTINUE TO REPORT WATER COVERED ROADWAYS   
  AND MUCH PONDING OF WATER ACROSS LOW LYING...FLOOD PRONE AREAS.    
  NATIONAL WEATHER SERVICE RADAR INDICATES FROM 6 TO 12 INCHES HAVE  
  FALLEN ACROSS THE AREA...WITH A FEW LIGHT BANDS OF RAINFALL        
  CONTINUING TO TRAIN ACROSS THE AREA. DUE TO EXTREMELY SATURATED    
  GROUNDS AND EXPECTED SLOW DRAINAGE OF FLOODED AREAS...A FLASH      
  FLOOD WARNING HAS BEEN REISSUED FOR THE AREA THROUGH 815 PM THIS   
  EVENING. 

* SOME AREAS LIKELY EXPERIENCING FLOOD PROBLEMS ARE...
  POPULARVILLE...KILN...DIAMONHEAD...LYMAN...LONG BEACH...PASS       
  CHRISTIAN...GULFPORT...BILOXI...GULF HILLS...ST. MARTIN...         
  DIBERVILLE AND PICAYUNE.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE THROUGH 
815 PM THIS EVENING OVER THE WARNED AREA.

HEAVY RAIN EARLIER TODAY HAS CAUSED FLOODING OF SMALL CREEKS AND 
STREAMS...HIGHWAYS...STREETS AND UNDERPASSES...AS WELL AS OTHER POUR 
DRAINAGE AND LOW LYING AREAS...AND THESE AREAS WILL BE SLOW TO DRAIN 
INTO THE EARLY EVENING HOURS.

RESIDENTS IN THE WARNED AREA SHOULD BE AWARE OF WIDESPREAD FLOODING 
AND NOT ATTEMPT TO CROSS WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE. REMEMBER...IT ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING 
WATER TO CARRY VEHICLES AWAY.

LAT...LON 3023 8955 3035 8843 3071 8845 3065 8937
      3097 8936 3096 8970 3065 8976

$$

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.

NWS New Orleans, LA wrote its last area forecast discussion before this flash flood warning went out at Aug 29, 3:53 PM CDT, 27 minutes earlier.

Area forecast discussion, Aug 29, 3:53 PM CDT, 27 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
353 PM CDT MON AUG 29 2005

...KATRINA DEPARTING THE REGION...

.SHORT TERM (TONIGHT AND TUESDAY)...THE CENTER OF HURRICANE KATRINA
WILL CONTINUE TRACKING NORTH ACROSS SOUTHEAST MISSISSIPPI THIS
AFTERNOON AND EAST CENTRAL MISSISSIPPI THIS EVENING. HURRICANE FORCE
WIND FIELDS HAVE BEEN COLLAPSING RAPIDLY SINCE LANDFALL THIS
MORNING....AND ARE EXPECTED TO DISAPPEAR BY AROUND MIDNIGHT WHEN THE
STORM REACHES EAST CENTRAL MISSISSIPPI.

THE INLAND TROPICAL STORM WARNING IS NOT EXPECTED TO LAST LONG PAST
1 AM. IT WILL INCLUDE LOUISIANA PARISHES AND MISSISSIPPI COUNTIES
AS INDICATED BELOW INTO TONIGHT. IT IS LIKELY WIND GUSTS OF 40 TO 60
MPH WILL OCCUR OVER INTERIOR SOUTHEAST MISSISSIPPI LATER THIS EVENING
WHICH WILL LIKELY PRODUCE LIMITED ADDDITIONAL DAMAGE OVER THE
NORTHWESTERN ZONES IN MISSISSIPPI AND ALABAMA. WIND WILL DROP AWAY
RAPIDLY AS THE CENTER OF KATRINA FILLS AND THE GRADIENT FLATTENS
SOME.

SIGNIFICANT COASTAL FLOODING WILL RECEDE IN ADDITION TO DECREASING
WINDS. THE FLASH FLOOD WATCH WILL NOT CONTINUE TONIGHT. DRY SLOT
MENTIONED EARLIER APPEARS OVER THE SABINE RIVER AND WILL BE INDUCTED
UNDER THE SOUTHWEST SIDE OF KATRINA TONIGHT BRINGING POPS DOWN
SOME...BUT HIGHER POPS REMAIN THE NORTHERN AND EASTERN ZONES
WHILE KATRINA TREKS NORTH INTO NORTHEAST MISSISSIPPI.

MORE COMPLETE AND DETAILED HAZARD INFORMATION IS PROVIDED IN THE
LATEST HURRICANE LOCAL STATEMENTS BEING ISSUED BY THE MOBILE
FORECAST OFFICE FOR NEW ORLEANS UNTIL THAT OFFICE IS RESTORED TO
OPERATIONAL STATUS.

&&

.LONG TERM (WEDNESDAY THROUGH TUESDAY)...NO CHANGES. WEAKENING
KATRINA EXITS TO THE NORTH AND THE FORECAST DRIES OUT THROUGH THE
EXTENDED PERIODS. NOT INTENDING TO CHANGE THE EXCELLENT GRIDS
RECEIVED FROM WFO NEW ORLEANS.

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  74  90  73  95 /  70  30  20  10
BTR  74  94  73  95 /  30  30  20  10
MSY  79  91  79  94 /  30  30  20  10
GPT  78  89  75  93 /  60  30  20  10

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: LOWER JEFFERSON...LOWER LAFOURCHE...LOWER
     PLAQUEMINES...LOWER ST. BERNARD...LOWER
     TERREBONNE...ORLEANS...ST. TAMMANY...AND UPPER ST. BERNARD.

     INLAND TROPICAL STORM WARNING UNTIL 1 AM TUESDAY FOR THE
     FOLLOWING ZONES: ASCENSION...LIVINGSTON...LOWER
     JEFFERSON...ST. CHARLES...ST. HELENA...ST. JAMES...ST. JOHN
     THE BAPTIST...TANGIPAHOA...UPPER JEFFERSON...UPPER
     LAFOURCHE...UPPER PLAQUEMINES...UPPER TERREBONNE...AND
     WASHINGTON.

GM...TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST
     PASS OF THE MISSISSIPPI RIVER OUT 20 NM...COASTAL WATERS
     FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER
     ATCHAFALAYA RIVER LA OUT 20 NM...AND LAKE PONTCHARTRAIN AND
     LAKE MAUREPAS.

     TORNADO WATCH UNTIL 7 PM MONDAY FOR THE FOLLOWING ZONES: AND
     COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF
     THE MISSISSIPPI RIVER OUT 20 NM.

MS...INLAND TROPICAL STORM WARNING UNTIL 1 AM TUESDAY FOR THE
     FOLLOWING ZONES: PEARL RIVER...PIKE...AND WALTHALL.

     TORNADO WATCH UNTIL 7 PM MONDAY FOR THE FOLLOWING ZONES:
     HANCOCK...HARRISON...JACKSON...AND PEARL RIVER.

     TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: HANCOCK...HARRISON...AND JACKSON.

GM...TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST
     PASS OF THE MISSISSIPPI RIVER OUT 20 NM...COASTAL WATERS
     FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER
     ATCHAFALAYA RIVER LA OUT 20 NM...AND LAKE PONTCHARTRAIN AND
     LAKE MAUREPAS.

     TORNADO WATCH UNTIL 7 PM MONDAY FOR THE FOLLOWING ZONES: AND
     COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF
     THE MISSISSIPPI RIVER OUT 20 NM.

&&

Hazardous weather outlook, Aug 29, 8:30 AM CDT, 7 hours 50 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE NEW ORLEANS LA
830 AM CDT MON AUG 29 2005

LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-291600-
AMITE-ASCENSION-ASSUMPTION-EAST BATON ROUGE-EAST FELICIANA-HANCOCK-
HARRISON-IBERVILLE-JACKSON-LIVINGSTON-LOWER JEFFERSON-
LOWER LAFOURCHE-LOWER PLAQUEMINES-LOWER ST. BERNARD-LOWER TERREBONNE-
ORLEANS-PEARL RIVER-PIKE-POINTE COUPEE-ST. CHARLES-ST. HELENA-
ST. JAMES-ST. JOHN THE BAPTIST-ST. TAMMANY-TANGIPAHOA-
UPPER JEFFERSON-UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST. BERNARD-
UPPER TERREBONNE-WALTHALL-WASHINGTON-WEST BATON ROUGE-WEST FELICIANA-
WILKINSON-
830 AM CDT MON AUG 29 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND SOUTHEAST
LOUISIANA AND EXTREME SOUTHWEST...SOUTH CENTRAL AND COASTAL
MISSISSIPPI.

...A HURRICANE WARNING IS IN EFFECT...
...AN INLAND HURRICANE/TROPICAL STORM WIND WARNING IS IN EFFECT...
...A FLASH FLOOD WATCH IS IN EFFECT...

.DAY ONE...TODAY AND TONIGHT

MAJOR HURRICANE KATRINA IS IMPACTING SOUTHEAST LOUISIANA AND SOUTH
MISSISSIPPI THIS MORNING. FOR IMMEDIATE INFORMATION...REFER TO THE
LATEST ADVISORIES...HURRICANE LOCAL ACTION STATEMENTS AND WARNINGS
REGARDING EXTREMELY DANGEROUS HURRICANE KATRINA.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SEASONAL WEATHER WILL RETURN TO THE OUTLOOK AREA BEGINNING TUESDAY
WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS EACH DAY.

.SPOTTER INFORMATION STATEMENT...

THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY
MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE AND TROPICAL WEATHER
OPERATIONS...IS STRONGLY REQUESTED AT THIS TIME UNTIL HURRICANE
KATRINA MOVES NORTH OF THE OUTLOOK AREA.

In the hours before

Special weather statement, Aug 29, 11:05 AM CDT, 5 hours 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS-BATON ROUGE LA
ISSUED BY NATIONAL WEATHER SERVICE MOBILE AL
1105 AM CDT MON AUG 29 2005

MSZ077-080>082-300000-
PEARL RIVER-HANCOCK-JACKSON-HARRISON-
1105 AM CDT MON AUG 29 2005

...TORNADO WATCH IN EFFECT UNTIL 7 PM...

THIS TORNADO WATCH INCLUDES...

HANCOCK...HARRISON...JACKSON...AND PEARL RIVER COUNTIES.

THE INTENSE EYEWALL AND ASSOCIATED SPIRAL BANDS FROM DANGEROUS
HURRICANE KATRINA WILL MOVE NORTHWARD ACROSS THE AREA THROUGH
AFTERNOON...WITH SOME OF THE STORMS CAPABLE OF PRODUCING ISOLATED
TORNADOES.

REMEMBER A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES
IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THESE AREAS SHOULD BE ON
THE LOOKOUT FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 3:09 AM CDT	Tornado Warning	LIX	Hancock	36 min
Aug 29, 3:59 AM CDT	Tornado Warning	LIX	Hancock, Harrison	46 min
Aug 29, 7:23 AM CDT	Tornado Warning	LIX	Hancock, Harrison	2 hr
Aug 29, 7:54 AM CDT	Flash Flood Warning	LIX	Hancock, Harrison, Jackson, Pearl River, Pike, Walthall	6 hr
Aug 29, 8:42 AM CDT	Tornado Warning	LIX	Pearl River	63 min
Aug 29, 9:43 AM CDT	Tornado Warning	LIX	Hancock, Pearl River	62 min
Aug 29, 9:50 AM CDT	Tornado Warning	LIX	Harrison	55 min
Aug 29, 10:49 AM CDT	Tornado Warning	LIX	Hancock, Harrison, Pearl River, Walthall	56 min
Aug 29, 11:55 AM CDT	Tornado Warning	LIX	Pearl River, Walthall	65 min
Aug 29, 12:10 PM CDT	Flash Flood Warning	LIX	Hancock, Harrison, Jackson, Pearl River	4 hr
Aug 29, 12:58 PM CDT	Flash Flood Warning	LIX	Pike, Walthall	4 hr

Nearby

Flash Flood Warnings in Mississippi, 2005 Every flash flood warning in 2005

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.