Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 40, NWS Shreveport, LA

March 10, 20165 parishes in Louisiana

NWS Shreveport, LA issued this flash flood warning at Mar 10, 2016, 7:07 PM CST for 5 parishes in Louisiana. It was in force for 6 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: Mar 10, 2016, 7:07 PM CST (01:07 UTC)
Expired: Mar 11, 2016, 1:00 AM CST
In force: 6 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: None

Counties Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Red River Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 44 km from the middle of the area, began a volume at 01:05 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

Shreveport, LA (KBAD), launched 00:00Z, 1.1 hours before the alert went out and 39 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: 915 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

971 
WGUS54 KSHV 110107
FFWSHV
LAC015-017-031-081-119-110700-
/O.NEW.KSHV.FF.W.0040.160311T0107Z-160311T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
707 PM CST THU MAR 10 2016

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CADDO PARISH IN NORTHWESTERN LOUISIANA...
  BOSSIER PARISH IN NORTHWESTERN LOUISIANA...
  WEBSTER PARISH IN NORTHWESTERN LOUISIANA...
  DE SOTO PARISH IN NORTHWESTERN LOUISIANA...
  RED RIVER PARISH IN NORTHWESTERN LOUISIANA...

* UNTIL 100 AM CST
    
* AT 704 PM CST...LOCAL LAW ENFORCEMENT CONTINUES TO REPORT NUMEROUS
  STATE...PARISH AND SECONDARY ROADS UNDERWATER ACROSS THE WARNING AREA
  THIS EVENING. WHILE THE RAINFALL HAS MOVED EAST OF THE REGION THIS
  EVENING...RIVERS...LAKES AND BAYOUS CONTINUE TO RISE FROM PREVIOUS
  EXCESSIVE RAINFALL ACROSS THE REGION WHERE WIDESPREAD RAINFALL AMOUNTS
  OF 8 TO 15 INCHES WITH HIGHER AMOUNTS HAVE FALLEN. ADDITIONAL RAINFALL
  WILL BE POSSIBLE LATE TONIGHT ACROSS THE REGION THAT WOULD ONLY PROLONG
  THE ALREADY SERIOUS FLOODING THREAT. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SHREVEPORT...BOSSIER CITY...MINDEN...SPRINGHILL...MANSFIELD...VIVIAN...
  HAUGHTON...GREENWOOD...BLANCHARD...COUSHATTA...BENTON...STONEWALL...
  LOGANSPORT...SIBLEY...CULLEN...PLAIN DEALING...COTTON VALLEY...OIL CITY...
  SAREPTA AND DOYLINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ENCOUNTER HIGH WATER...MOVE TO HIGHER GROUND NOW! ACT QUICKLY TO
PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

IF YOU ENCOUNTER FLOODED ROADS...TURN AROUND...DON'T DROWN! MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3190 9390 3199 9404 3302 9404 3302 9324
      3272 9324 3271 9319 3246 9315 3245 9324
      3241 9324 3239 9343 3237 9340 3224 9342
      3224 9322 3206 9314 3198 9313 3197 9324
      3189 9327 3193 9342 3184 9344 3185 9388

$$

13

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 Shreveport, LA wrote its last area forecast discussion before this flash flood warning went out at Mar 10, 3:57 PM CST, 3 hours 10 minutes earlier.

Area forecast discussion, Mar 10, 3:57 PM CST, 3 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
357 PM CST THU MAR 10 2016

.DISCUSSION...
WV IMAGERY THIS AFTERNOON SHOWING SLOT OF DRY AIR IN OVER MUCH OF
OUR REGION...WHICH HAS CONTRIBUTED TO THE RETURN-FREE RADAR IMAGERY
AND THE BREAKS IN THE CLOUDS. THIS EXTENDED BREAK OVER E TX/SE
OK/AND PORTIONS OF SW AR HAS IN PART ALLOWED FOR THE FLASH FLOOD
WATCH TO BE DROPPED FOR THESE AREAS. WE WILL SEE ADDITIONAL
RAINFALL DEVELOPING BY TONIGHT...INCREASING BY FRIDAY MORNING...
AND TAPERING OFF AGAIN FRIDAY NIGHT...AS THE UPPER LOW LIFTS N OUT
OF MEXICO INTO TX. ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO
INCHES WITH ISOLATED HIGHER AMOUNTS OF UP TO THREE INCHES WILL BE
POSSIBLE OVER N LA/EXTREME E TX/SRN AR... WHERE WE HAVE MAINTAINED
THE FF WATCH. THESE AREAS ALSO HAVE ONGOING FLOODING ISSUES.
LESSER AMOUNTS ARE EXPECTED ELSEWHERE.

THE UPPER LOW WILL CONTINUE ITS TRACK NWD THIS WEEKEND...OPENING
UP AS IT MERGES WITH ANOTHER LOW EJECTING FROM THE ROCKIES. THIS
WILL END ITS LONG INFLUENCE BY LATE SATURDAY NIGHT. THE SECONDARY
UPPER LOW WILL QUICKLY TRACK ACROSS THE REGION...BRINGING SOME
ADDITIONAL SHWRS/TSTMS TO THE REGION...MAINLY OVER SE OK/SW AR.
THIS DISTURBANCE WILL QUICKLY DEPART AND LEAVE US UNDER DRY ZONAL
FLOW ALOFT. TEMPS ARE EXPECTED TO REACH WELL ABOVE NORMAL WITH NO
CHANGE IN AIRMASS...SUNSHINE PLENTY...AND NO RAINFALL EXPECTED.

SOME LOWER END CHANCES FOR RAIN MAY COME IN AS A SLOW-MOVING
FRONT AND TROF APPROACH WEDNESDAY TO CARRY US THROUGH THE END OF
THE FCST PD. /12/

&&

.PREV DISCUSSION... /ISSUED 1159 AM CST THU MAR 10 2016/

AVIATION...
IFR/LOW MVFR CIGS WILL PERSIST THIS AFTERNOON ACROSS THE
REGION...WITH THE -SHRA EXPECTED TO CONTINUE TO DIMINISH FROM SW
TO NE THROUGH MID AFTERNOON ACROSS SW AR/N LA. IFR/LIFR CIGS ARE
EXPECTED TO REDEVELOP THOUGH THIS EVENING AS A SURFACE TROUGH
REMAINS STATIONARY FROM DEEP E TX ACROSS N LA OVERNIGHT. SCT -SHRA
WITH EMBEDDED TSRA ARE EXPECTED TO REDEVELOP LATE TONIGHT ACROSS
SE TX/S LA...WHICH WILL QUICKLY SPREAD NNW INTO E TX/N LA THROUGH
12Z FRIDAY. THIS CONVECTION SHOULD BECOME MORE NUMEROUS ACROSS THE
REMAINDER OF THE REGION AFTER 12Z...RESULTING IN LIFR/IFR CIGS AND
REDUCED VSBYS THROUGH THE AFTERNOON BEFORE DIMINISHING FROM S TO
N. HAVE PREVAILED SHRA FOR ALL OF THE TERMINALS...WITH TSRA MOST
PROBABLE ACROSS THE LFK/MLU/ELD TERMINALS CLOSER TO THE WARM
SECTOR OF THE TROUGH. NE WINDS 5-10KTS WILL PERSIST THROUGH MUCH
OF THE TAF PERIOD. /15/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  63  72  60  72 /  80  90  50  50
MLU  65  73  63  72 /  80  90  70  60
DEQ  56  64  56  70 /  60  90  70  50
TXK  57  66  58  71 /  60  90  60  50
ELD  60  68  60  71 /  80  90  70  60
TYR  60  70  57  71 /  60  70  50  40
GGG  61  70  58  72 /  60  80  50  50
LFK  65  74  58  74 /  60  70  40  40

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...FLASH FLOOD WATCH THROUGH FRIDAY AFTERNOON FOR ARZ071>073.

LA...FLASH FLOOD WATCH THROUGH FRIDAY AFTERNOON FOR LAZ001>006-
     010>014-017>022.

OK...NONE.
TX...FLASH FLOOD WATCH THROUGH FRIDAY AFTERNOON FOR TXZ126-138-151-
     153-166-167.

&&

12

Hazardous weather outlook, Mar 10, 11:34 AM CST, 7 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1134 AM CST THU MAR 10 2016

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-111745-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-DE SOTO-
RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE-NATCHITOCHES-WINN-
GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE-FRANKLIN-TITUS-CAMP-
MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG-HARRISON-CHEROKEE-RUSK-
PANOLA-NACOGDOCHES-SHELBY-ANGELINA-SAN AUGUSTINE-
1134 AM CST THU MAR 10 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND
NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

ONGOING FLOODING WILL CONTINUE AS SHOWERS AND ISOLATED THUNDERSTORMS
MOVE ACROSS THE REGION TODAY AND TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THE THREAT FOR FLASH FLOODING WILL CONTINUE INTO AT LEAST
FRIDAY AFTERNOON. ALTHOUGH THE HEAVY RAIN WILL BECOME LESS
WIDESPREAD...SCATTERED THUNDERSTORMS WITH EVEN BRIEF HEAVY RAIN...
MAY BE ENOUGH TO PERPETUATE ONGOING AREAS OF FLOODING. THE UPPER
LOW PRESSURE SYSTEM BRINGING THE SHOWERS AND THUNDERSTORMS TO THE
AREA...WILL FINALLY MOVE TO THE EAST BY LATE IN THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...

NO FURTHER ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR
RADIO OPERATORS...AND STORM SPOTTERS WILL BE NEEDED THROUGH
TONIGHT.

12

In the hours before

Local storm report, Mar 10, 1:55 PM CST, 5 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
155 PM CST THU MAR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0120 PM     FLASH FLOOD      BOSSIER CITY            32.52N  93.66W
03/10/2016                   BOSSIER            LA   BROADCAST MEDIA

            HIGH WATER RESCUES IN THE GOLDEN MEADOWS SUBDIVISION IN
            SOUTH BOSSIER.

&&

EVENT NUMBER SHV1600172

20

Local storm report, Mar 10, 2:00 PM CST, 5 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
200 PM CST THU MAR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0130 PM     FLASH FLOOD      BOSSIER CITY            32.52N  93.66W
03/10/2016                   BOSSIER            LA   LAW ENFORCEMENT

            SHERIFF DEPARTMENT REPORTS SEVERAL HIGH WATER RESCUES
            IN PROGRESS ACROSS SOUTHERN BOSSIER PARISH.

&&

EVENT NUMBER SHV1600173

20

Local storm report, Mar 10, 2:43 PM CST, 4 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
243 PM CST THU MAR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0227 PM     FLASH FLOOD      MONROE                  32.51N  92.08W
03/10/2016                   OUACHITA           LA   EMERGENCY MNGR

            EM OFFICE REPORTS SEVERAL HIGH WATER RESCUES IN
            PROGRESS ACROSS OUACHITA PARISH.

&&

EVENT NUMBER SHV1600174

20

Local storm report, Mar 10, 6:31 PM CST, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
631 PM CST THU MAR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     FLASH FLOOD      7 ESE WINNFIELD         31.90N  92.53W
03/10/2016                   WINN               LA   LAW ENFORCEMENT

            HIGH WATER RESCUE CONDUCTED ON PARKER LONG JR. ROAD.

&&

EVENT NUMBER SHV1600175

20

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 10, 8:29 PM CST	River Flood Warning	SHV	Bossier, Caddo, Red River	6 days
Mar 10, 8:42 PM CST	Flash Flood Warning	SHV	Grant, Natchitoches, Sabine, Winn	49 hr
Mar 10, 9:08 PM CST	Flash Flood Warning	SHV	Bienville, Caldwell, Claiborne, Jackson, Lincoln, Ouachita and 2 more	21 hr
Mar 10, 11:50 PM CST	Flash Flood Warning	SHV	LaSalle	41 hr
Mar 11, 12:52 AM CST	Flash Flood Warning	SHV	Bossier, Caddo, De Soto, Red River, Webster	12 hr
Mar 11, 12:43 PM CST	Flash Flood Warning	SHV	Bossier, Caddo, De Soto, Red River, Webster	13 hr

Nearby

Flash Flood Warnings in Louisiana, 2016 Every flash flood warning in 2016

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.