Alert archive / Louisiana / Flash Flood Warnings in 2007
Flash Flood Warning 18, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at Sep 20, 2007, 2:17 PM CDT for Catahoula Parish, Louisiana. It was in force for 118 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 20, 2007, 2:17 PM CDT (19:17 UTC)
- Expired
- Sep 20, 2007, 4:15 PM CDT
- In force
- 118 min
- Issued by
- NWS Jackson, MS
- Area
- Counties, with a storm outline in the text
- Flood severity
- Minor
County Catahoula Parish, LA
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, 7.3 hours before the alert went out and 179 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1610 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -45 m²/s²
- 0-3 km storm-relative helicity
- -45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KJAN 201922 FFWJAN LAC025-202115- /T.NEW.KJAN.FF.W.0016.070920T1917Z-070920T2115Z/ /00000.1.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED TEST...FLASH FLOOD WARNING...TEST NATIONAL WEATHER SERVICE JACKSON MS 217 PM CDT THU SEP 20 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A * THIS IS A TEST MESSAGE. FLASH FLOOD WARNING FOR A DAM FLOODGATE RELEASE IN... CATAHOULA PARISH IN NORTHEAST LOUISIANA... * UNTIL 415 PM CDT * THIS IS A TEST MESSAGE. AT 217 PM CDT...THE FLOODGATES ON THE TEST DAM WERE OPENED CAUSING FLASH FLOODING DOWNSTREAM ON THE TEST RIVER. * THIS IS A TEST MESSAGE. AFFECTED LOCATIONS INCLUDE NO LOCATION THIS IS A TEST MESSAGE. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE. LAT...LON 3184 9182 3172 9180 3162 9184 3175 9199 $$ MVP
3 follow-up statements
000 WGUS74 KJAN 201931 FFSJAN TEST...FLASH FLOOD STATEMENT...TEST NATIONAL WEATHER SERVICE JACKSON MS 230 PM CDT THU SEP 20 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... LAC025-202115- /T.CON.KJAN.FF.W.0016.000000T0000Z-070920T2115Z/ /00000.1.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATAHOULA LA- 230 PM CDT THU SEP 20 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR CATAHOULA PARISH... THIS IS A TEST MESSAGE. AT 214 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGIST CONTINUED TO INDICATE A TEST THIS IS A TEST MESSAGE. LOCATIONS IN THE WARNING INCLUDE A TEST... THIS IS A TEST MESSAGE. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE. LAT...LON 3184 9182 3172 9180 3162 9184 3175 9199 TIME...MOT...LOC 1930Z 180DEG 0KT 3173 9186 $$ MVP
000 WGUS74 KJAN 201942 FFSJAN TEST...FLASH FLOOD STATEMENT...TEST NATIONAL WEATHER SERVICE JACKSON MS 239 PM CDT THU SEP 20 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... LAC025-201949- /T.EXP.KJAN.FF.W.0016.000000T0000Z-070920T2215Z/ /00000.1.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATAHOULA LA- 239 PM CDT THU SEP 20 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CATAHOULA PARISH... THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE. LAT...LON 3184 9182 3172 9180 3162 9184 3175 9199 TIME...MOT...LOC 1939Z 180DEG 0KT 3173 9186 $$ MVP
000 WGUS74 KJAN 201947 FFSJAN TEST...FLASH FLOOD STATEMENT...TEST NATIONAL WEATHER SERVICE JACKSON MS 247 PM CDT THU SEP 20 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... LAC025-201957- /T.CAN.KJAN.FF.W.0017.000000T0000Z-070920T2245Z/ /00000.1.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CATAHOULA LA- 247 PM CDT THU SEP 20 2007 ...THIS MESSAGE IS FOR TEST PURPOSES ONLY... ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CATAHOULA PARISH... THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS MESSAGE. LAT...LON 3177 9184 3171 9173 3166 9183 3174 9184 TIME...MOT...LOC 1947Z 180DEG 0KT 3172 9181 $$ MVP
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 Jackson, MS wrote its last area forecast discussion before this flash flood warning went out at Sep 20, 10:24 AM CDT, 3 hours 53 minutes earlier.
Area forecast discussion, Sep 20, 10:24 AM CDT, 3 hours 53 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSON MS 1024 AM CDT THU SEP 20 2007 .UPDATE...STRONG HIGH PRESSURE AT THE SURFACE AND ALOFT CONTINUE THIS MORNING WITH CLEAR SKIES PREVAILING. EXPECT THIS TO CONTINUE THROUGH THE DAY WITH HIGHS IN THE UPPER 80S TO NEAR 90. HOURLY TEMPERATURES ARE ON TRACK THIS MORNING AND THE REST OF THE FORECAST LOOKS GOOD WITH NO CHANGES NEEDED AT THIS TIME./15/ && SHORT TERM...TODAY THROUGH FRIDAY...HIGH PRESSURE AT THE SURFACE...WITH STRONG RIDGING ALOFT WILL BEGIN TO LIFT AWAY FROM THE REGION FOR TODAY THROUGH TONIGHT. THIS WILL OCCUR AS AN AREA OF LOW PRESSURE MOVES WEST ALONG THE NORTHERN GULF COASTAL REGION. SKIES WILL BE GENERALLY SUNNY TODAY WITH SOME PATCHY HIGH THIN CLOUDS COMING FROM THE EAST AHEAD OF THE GULF SYSTEM. TONIGHT SHOULD BE GENERALLY MOSTLY CLEAR IN THE EVENING...BUT EXPECT SOME MID TO HIGH LEVEL CLOUD COVER TO DEVELOP FROM THE EAST AFTER MIDNIGHT. FOR FRIDAY CLOUDS WILL CONTINUE TO GRADUALLY INCREASE FROM THE EAST DURING THE DAY. THERE WILL BE ENOUGH MOISTURE AND LIMITED INSTABILITY FOR ISOLATED CONVECTION ACROSS THE EAST AND SOUTHEAST DURING THE AFTERNOON. AS FAR AS TEMPS ARE CONCERNED WENT CLOSE TO MOS GUIDANCE FOR DAILY HIGHS. READINGS WILL RANGE FROM THE UPPER 80S TO AROUND 90 TODAY AS WELL AS UPPER 80S TO LOWER 90S FOR FRIDAY. LOWS FOR TONIGHT WILL RANGE FROM THE UPPER 50S TO LOWER 60S. MOS GUIDANCE LOOKED A LITTLE COOL FOR THE EAST WHERE THE CLOUD COVER WILL BEGIN TO DEVELOP. SO WENT WITH THE SLIGHTLY WARMER MAV GUIDANCE. /17/ .LONG TERM...NEEDLESS TO SAY MANY UNCERTAINTIES REMAIN REGARDING THE LONG TERM FORECAST. THE PRIMARY SOURCE OF DISCREPANCY RELATES TO THE EVENTUAL EVOLUTION OF THE LOW THAT IS FORECAST TO MOVE FROM THE FLORIDA COAST INTO THE GULF. MODELS ARE COMING INTO MORE AGREEMENT ON THE TRACK OF THE SURFACE LOW...BOTH POSITIONING IT IN THE VICINITY OF THE MOUTH OF THE MISSISSIPPI RIVER SATURDAY. THE NEWEST MODEL RUNS ARE ALSO IN BETTER GENERAL AGREEMENT ON THE LOCATION OF STRONGEST LOW LEVEL INFLOW WITH THE EURO SHIFTING THE FOCUS OF THE STRONG LOW LEVEL MOISTURE PUSH FARTHER EWD...DEVELOPING A LOW LEVEL MOISTURE TRANSPORT MAX OVER MS AND LA. SIGNIFICANT DIFFERENCES ARISE AFTER THAT. THE GFS LIFTS THE SURFACE LOW INLAND BEFORE WASHING IT OUT AHEAD OF ANOTHER SURFACE LOW THAT IT LIFTS INLAND FROM THE CENTRAL GULF SUNDAY. THE EURO TRACKS THE SURFACE LOW NWWD ACROSS LA...TRACKING THE REMNANTS INTO NERN TX BY SUNDAY EVENING. BOTH SOLUTIONS RESULT IN A LARGE SWATH OF RAINFALL ACROSS THE AREA THIS WEEKEND. THE EVENTUAL NATURE OF THE LOW CENTER WILL HAVE A GREAT DEAL TO DO IN DETERMINING THE NATURE AND INTENSITY OF RAINFALL OVER THE FORECAST AREA. THE MODELS ARE PRODUCING A WIDE AREA OF RAINFALL ACROSS THE AREA THIS WEEKEND BUT QPF TOTALS ARE FORECAST TO REMAIN BELOW AN INCH AT MOST LOCATIONS. IF THE DEVELOPING GULF LOW BECOMES MORE TROPICAL IN NATURE...HEAVIER QPF AMOUNTS WILL BE POSSIBLE. AN AIR FORCE HURRICANE HUNTER AIRCRAFT IS SCHEDULED TO INVESTIGATE THE SYSTEM LATER TODAY. MODEL SOLUTIONS FALL INTO MORE AGREEMENT BY MONDAY WHEN THE REMNANTS OF THE LOW FALL APART INLAND AHEAD OF A SURFACE TROUGH APPROACHING FROM THE WEST. RAIN CHANCES CONTINUE INTO NEXT WEEK WITH UPPER TROUGHING FORCING UPPER RIDGING EWD OFF THE EAST COAST AND SWD INTO THE GULF. SOME DISCREPANCIES ARISE REGARDING TIMING OF THE APPROACHING SURFACE TROUGH BUT MODELS AGREE IN SUGGESTING THE BOUNDARY WILL STALL ACROSS THE REGION. CONSIDERED INCREASING COOLER TEMPS FORECAST FOR THE TUE-THU TIME FRAME BUT WILL HOLD OFF DUE TO UNCERTAINTIES IN FRONTAL TIMING. && .AVIATION...VFR CONDITIONS ARE EXPECTED AT ALL TAF SITES OVER THE NEXT 24 HOURS. /17/ && .PRELIMINARY POINT TEMPS/POPS... JACKSON 61 89 70 86 / 0 3 22 51 MERIDIAN 60 89 70 86 / 0 17 33 50 VICKSBURG 62 92 68 88 / 0 3 14 49 HATTIESBURG 64 88 71 87 / 0 24 23 57 NATCHEZ 61 89 68 85 / 0 3 7 46 GREENVILLE 62 92 67 89 / 0 3 9 34 GREENWOOD 60 90 68 87 / 0 2 13 35 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...NONE. LA...NONE. AR...NONE. && 17/03/15
Hazardous weather outlook, Sep 20, 2:57 AM CDT, 11 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTION... NATIONAL WEATHER SERVICE JACKSON MS 257 AM CDT THU SEP 20 2007 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 210800- ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND- MADISON-FRANKLIN-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR-SUNFLOWER- LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES-CHOCTAW- OKTIBBEHA-WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON-NOXUBEE- ISSAQUENA-SHARKEY-YAZOO-LEAKE-NESHOBA-KEMPER-WARREN-HINDS-RANKIN- SCOTT-NEWTON-LAUDERDALE-CLAIBORNE-COPIAH-SIMPSON-SMITH-JASPER- CLARKE-JEFFERSON-ADAMS-LINCOLN-LAWRENCE-JEFFERSON DAVIS-COVINGTON- JONES-MARION-LAMAR-FORREST- 257 AM CDT THU SEP 20 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI... NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS. .DAY ONE...TODAY AND TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS IS NOT EXPECTED THROUGH NEXT WEDNESDAY. FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK. 17
Nearby
Flash Flood Warnings in Louisiana, 2007Every flash flood warning in 2007
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.