Alert archive / Texas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 405, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Oct 23, 2011, 12:24 AM CDT for Franklin County, Red River County, Titus County, Texas. It was in force for 51 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
- Oct 23, 2011, 12:24 AM CDT (05:24 UTC)
- Expired
- Oct 23, 2011, 1:15 AM CDT
- In force
- 51 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Franklin County, TX, Red River County, TX, Titus County, TX
The radar
The Shreveport radar (KSHV), 156 km from the middle of the area, began a volume at 05:23 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 severe thunderstorm 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 22, 3:37 PM CDT | Severe Thunderstorm Watch | SPC | 14 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 5.4 hours before the alert went out and 161 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
- 79 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 2162 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
678 WUUS54 KSHV 230524 SVRSHV TXC159-387-449-230615- /O.NEW.KSHV.SV.W.0405.111023T0524Z-111023T0615Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 1224 AM CDT SUN OCT 23 2011 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... FRANKLIN COUNTY IN NORTHEAST TEXAS... THIS INCLUDES THE CITY OF HAGANSPORT... SOUTHWESTERN RED RIVER COUNTY IN NORTHEAST TEXAS... TITUS COUNTY IN NORTHEAST TEXAS... THIS INCLUDES THE CITY OF MOUNT PLEASANT... * UNTIL 115 AM CDT * AT 1218 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 20 MILES WEST OF HAGANSPORT TO 11 MILES NORTHEAST OF HAGANSPORT...OR ALONG A LINE EXTENDING FROM 10 MILES NORTH OF SULPHUR SPRINGS TO 10 MILES SOUTH OF CLARKSVILLE...AND MOVING SOUTHEAST AT 20 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT VERNON AND PURLEY... PRECAUTIONARY/PREPAREDNESS ACTIONS... DAMAGING WINDS OF 60 MPH WERE REPORTED IN PARIS TEXAS WITH THESE STORM. THESE ARE DANGEROUS STORMS...SEEK SAFE SHELTER AND STAY AWAY FROM WINDOWS! && LAT...LON 3340 9531 3349 9511 3315 9484 3300 9531 TIME...MOT...LOC 0522Z 336DEG 19KT 3327 9556 3346 9510 $$ VII
1 follow-up statement
785 WWUS54 KSHV 230546 SVSSHV SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 1246 AM CDT SUN OCT 23 2011 TXC159-387-449-230615- /O.CON.KSHV.SV.W.0405.000000T0000Z-111023T0615Z/ FRANKLIN TX-RED RIVER TX-TITUS TX- 1246 AM CDT SUN OCT 23 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR TITUS...RED RIVER AND FRANKLIN COUNTIES... AT 1243 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 15 MILES NORTHWEST OF CYPRESS TO TALCO...OR ALONG A LINE EXTENDING FROM 6 MILES EAST OF SULPHUR SPRINGS TO 11 MILES EAST OF HAGANSPORT...MOVING SOUTHEAST AT 40 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT VERNON...WINFIELD...MILLER'S COVE...PURLEY...MOUNT PLEASANT... MONTICELLO AND HOPEWELL LAT...LON 3336 9531 3342 9506 3315 9484 3300 9531 TIME...MOT...LOC 0546Z 336DEG 19KT 3315 9550 3334 9504 $$ VII
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Oct 23, 12:07 AM CDT, 17 minutes earlier.
Area forecast discussion, Oct 23, 12:07 AM CDT, 17 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE SHREVEPORT LA 1207 AM CDT SUN OCT 23 2011 .UPDATE... ZONE UPDATE JUST SENT TO CANCEL SVR WATCH 869 FOR NE TX/SE OK/EXTREME SW AR. ONGOING MCS OVER NNE TX/SE OK/ADJACENT SW AR CONTINUES TO MAKES STEADY PROGRESS SE TONIGHT...BUT HAVE SHOWN A WEAKENING TREND AS IT TRACKS INTO A MORE STABLE AND SLIGHTLY DRIER ENVIRONMENT FARTHER S. 30KT SSW LLJ OVER NCNTRL TX ATOP THE COLD POOL SURGING S WILL HELP SUSTAIN THIS CONVECTION OVERNIGHT...ESPECIALLY AS THE PRIMARY SHORTWAVE OVER SRN OK HELPING TO FORCE THIS CONVECTION CONTINUES TO TRACK SE ACROSS THE REGION OVERNIGHT. CAN/T RULE OUT LOCALLY STRONGER WIND GUSTS ALSO THE COLD POOL AS IT ENTERS NE TX...WHILE STEEP LAPSE RATES MAY ALSO ADD A MARGINAL HAIL THREAT AS WELL. BUT OVERALL...THE SVR THREAT SHOULD BE ISOLATED OVER OUR REGION OVERNIGHT. ALSO EXPANDED CATEGORICAL/LIKELY POPS FARTHER S ACROSS E TX AHEAD OF THE MCS. NO OTHER CHANGES NEEDED TO THE FORECAST ATTM. 15 && .PREV DISCUSSION... /ISSUED 949 PM CDT SAT OCT 22 2011/ DISCUSSION... MCS CONTINUES TO MAKE STEADY PROGRESS SE ACROSS SCNTRL/SE OK ATTM...ALTHOUGH MUCH OF THE CONVECTION HAS REMAINED N OF A WEAK WARM FRONT/INVERTED SFC TROUGH...WHICH EXTENDED ACROSS SCNTRL AND SE OK A COUPLE OF COUNTIES N OF THE RED RIVER. HOWEVER...THE WRN EDGE OF THE CONVECTION REMAINS MOST INTENSE NNE OF ADM TO ATOKA...WHERE THE BEST SFC BASED INSTABILITY AND MOISTURE CONVERGENCE LIE. THIS CONVECTION HAS PRODUCED A SSEWD PROPAGATING COLD POOL...WHICH WILL CROSS THE RED RIVER INTO FAR NCNTRL/NE TX AFTER 0330Z. SFC MESOANALYSIS INDICATES THAT THE AIR MASS IS MUCH MORE STABLE ACROSS N/NE TX THIS EVENING...WITH WEAK CAPPING NOTED ON THE 00Z FWD RAOB. HOWEVER...VERY STEEP MID LEVEL LAPSE RATES AND COLDER MID LEVEL TEMPS ALOFT NOTED ON THE REGIONAL RAOBS UPSTREAM ACROSS OK HAVE RESULTED IN A NUMBER OF SVR HAIL REPORTS ACROSS CNTRL/NE OK N OF THE FRONT...WITH THE HAIL THREAT PERSISTING FOR A FEW MORE HOURS AS THESE STORMS MOVE ACROSS THE RED RIVER. DESPITE A MORE STABLE SFC BASED AIR MASS FARTHER S...A 25-30KT SWRLY LLJ SHOULD MAINTAIN ORGANIZED CONVECTION ALONG THE COLD POOL...ESPECIALLY AS STRONG FORCING ALOFT BEGINS TO OVERSPREAD THE AREA LATE WITH THE APPROACH OF A SHARP SHORTWAVE TROUGH NOTED ON THE WATER VAPOR LOOP OVER CNTRL OK. DID MAKE SOME MINOR CHANGES TO THE GOING POPS TONIGHT...MAINLY TO INCREASE THEM TO CATEGORICAL NW OF I-30 THIS EVENING...AND ACROSS THE REMAINDER OF SW AR AFTER 06Z. ALSO TONED DOWN POPS OVERNIGHT FOR DEEP E TX/SRN SECTIONS OF NCNTRL LA...AS THE LATER ONSET OF THE CONVECTION /LATER THAN THE 18Z MODEL RUNS/ WILL RESULT IN A LATER TIMING ACROSS THESE AREAS...MAINLY AFTER 12Z SUNDAY. AN ISOLATED SVR THREAT MAY CARRY OVER AFTER 06Z ACROSS NE TX/SE OK/SW AR...BUT THIS THREAT SHOULD DIMINISH OVERNIGHT AS THE BEST FORCING WILL PROCEED NE OF THE ONGOING SVR CONVECTION...WHERE THE BEST CONVERGENCE/INSTABILITY LIE. BUT WILL LET THE SVR WATCH 869 RIDE THROUGH 05Z...AND CONTINUE TO MONITOR RADAR TRENDS TO SEE IF ANY LOCAL EXTENTION IS NECESSARY. ALSO RAISED POPS SUNDAY MORNING ACROSS E TX/N LA...WITH THE WEAKENED CONVECTION EXPECTED TO PERSIST THROUGH MIDMORNING BEFORE DIMINISHING FROM NW TO SE. VERY LITTLE IF ANY CHANGES WERE NEEDED TO THE ONGOING FORECAST MIN TEMPS TONIGHT. ZONE UPDATE ALREADY OUT...GRIDS WILL BE AVAILABLE SHORTLY. 15 AVIATION... A SHORT WAVE IN NW FLOW ALOFT...BRINGING INCREASING TSTM DEVELOPMENT THIS EVE ACROSS MUCH OF EASTERN OK. MOST OF THE CONVECTION HAS REMAINED ON THE NORTH SIDE OF A WEAK EAST TO WEST FRONTAL BOUNDARY. VERY UNSTABLE AIR ON THE COOL SIDE OF BOUNDARY...AS SEEN ON OKC 0Z SOUNDING...HAS BEEN YIELDING SVRL HAILSTORMS. LACK OF DEVELOPMENT ON SOUTH SIDE OF BOUNDARY SUGGESTS SVRL HOURS BEFORE STORMS REACH AIRPORT TERMINALS IN CWA...WITH POSSIBLE EXCEPTION OF TXK...BEFORE 06Z. FAIRLY LIGHT LOW LVL SOUTHERLY FLOW...AND LACK OF FROPA...SUGGEST CIGS TO REMAIN MOSTLY VFR THRU PERIOD...OUTSIDE OF PSBL CONVECTION. FOG MAY DEVELOP ACROSS MOSTLY MLU AND ELD TERMINALS...WHERE LIGHT WINDS AND LIMITED CLOUDS MAY ALLOW FOR TEMPS TO FALL THRU DEWPOINTS. AT OTHER LOCATIONS...RAINFALL MAY BE NEEDED FOR FOG TO DEVELOP LATER TONIGHT. /VII/ && .PRELIMINARY POINT TEMPS/POPS... SHV 60 78 55 82 62 / 70 40 10 0 0 MLU 54 74 51 79 59 / 50 50 10 0 0 DEQ 57 73 48 80 59 / 80 20 10 0 0 TXK 58 72 52 81 62 / 80 30 10 0 0 ELD 54 72 46 79 60 / 80 50 10 0 0 TYR 62 81 57 83 64 / 70 20 10 0 0 GGG 60 80 57 83 62 / 70 30 10 0 0 LFK 60 83 57 85 62 / 40 30 10 0 0 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...NONE. LA...NONE. OK...NONE. TX...NONE. && 15
Hazardous weather outlook, Oct 22, 12:00 PM CDT, 12 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1200 PM CDT SAT OCT 22 2011 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-231100- ANGELINA-BIENVILLE-BOSSIER-BOWIE-CADDO-CALDWELL-CAMP-CASS-CHEROKEE- CLAIBORNE-COLUMBIA-DE SOTO-FRANKLIN-GRANT-GREGG-HARRISON-HEMPSTEAD- HOWARD-JACKSON-LA SALLE-LAFAYETTE-LINCOLN-LITTLE RIVER-MARION- MCCURTAIN-MILLER-MORRIS-NACOGDOCHES-NATCHITOCHES-NEVADA-OUACHITA- PANOLA-RED RIVER LA-RED RIVER TX-RUSK-SABINE LA-SABINE TX- SAN AUGUSTINE-SEVIER-SHELBY-SMITH-TITUS-UNION AR-UNION LA-UPSHUR- WEBSTER-WINN-WOOD- 1200 PM CDT SAT OCT 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST OKLAHOMA...SOUTHWEST AND SOUTH CENTRAL ARKANSAS...EAST AND NORTHEAST TEXAS...AND NORTHWEST AND NORTH CENTRAL LOUISIANA. .DAY ONE...TODAY AND TONIGHT... ABUNDANT GULF MOISTURE WILL BE MOVING NORTH FROM THE GULF OF MEXICO INTO A WARM FRONT NEAR THE RED RIVER...AS AN UPPER LEVEL DISTURBANCE MOVES SOUTHEAST ACROSS THE AREA. THIS WILL RESULT IN SCATTERED TO NUMEROUS THUNDERSTORMS...SOME OF WHICH MAY BECOME SEVERE. LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE...ALONG WITH DEADLY LIGHTNING. AREAS ALONG AND NORTH OF INTERSTATE 20 WILL HAVE THE BEST CHANCE FOR THUNDERSTORMS AND SEVERE WEATHER. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY... THUNDERSTORMS WILL SPREAD SOUTHEAST ACROSS THE AREA DURING THE DAY SUNDAY...AND END BY LATE AFTERNOON OR EARLY EVENING. INSTABILITY IS EXPECTED TO BE WEAK. HOWEVER...HIGH LAPSE RATES ALONG WITH GULF MOISTURE...AND VEERING WIND UNDER THE NORTHWEST FLOW PATTERN ALOFT...WILL PRODUCE ISOLATED SEVERE THUNDERSTORMS. ANOTHER AND MORE AMPLIFIED UPPER TROUGH WILL SEND A STRONGER COLD FRONT INTO THE FOUR STATE REGION LATE IN THE WEEK. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...HAM RADIO OPERATORS...AND STORM SPOTTERS MAY BE REQUIRED LATE THIS AFTERNOON AND OVERNIGHT.
In the hours before
Special weather statement, Oct 22, 10:57 PM CDT, 1 hour 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1057 PM CDT SAT OCT 22 2011
ARZ050-059-OKZ077-TXZ096-230500-
LITTLE RIVER-MCCURTAIN-RED RIVER-SEVIER-
1057 PM CDT SAT OCT 22 2011
...SIGNIFICANT WEATHER ADVISORY...
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL MIDNIGHT CDT...FOR THE FOLLOWING
COUNTIES...
IN SOUTHWEST ARKANSAS...
LITTLE RIVER AND SEVIER...
IN SOUTHEAST OKLAHOMA...
MCCURTAIN...
IN NORTHEAST TEXAS...
RED RIVER...
INCLUDING THE FOLLOWING LOCATIONS...
ARKINDA...DE QUEEN...FOREMAN...HORATIO...WINTHROP...BROKEN
BOW...IDABEL...BAGWELL...BOXELDER...CLARKSVILLE AND
MANCHESTER...
AT 1057 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES
EAST OF NASHOBA TO 6 MILES SOUTH OF OLETA TO GOODLAND...OR ALONG A
LINE EXTENDING FROM 19 MILES SOUTHEAST OF CLAYTON TO 14 MILES
NORTHEAST OF HUGO TO HUGO...MOVING SOUTHEAST AT 50 MPH.
PEA SIZE HAIL...AND WINDS 40 TO 45 MPH ARE EXPECTED WITH THESE
STORMS.
15Special weather statement, Oct 23, 12:04 AM CDT, 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1204 AM CDT SUN OCT 23 2011
ARZ050-051-059-OKZ077-TXZ096-097-230600-
BOWIE-HOWARD-LITTLE RIVER-MCCURTAIN-RED RIVER-SEVIER-
1204 AM CDT SUN OCT 23 2011
...SIGNIFICANT WEATHER ADVISORY...
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 100 AM CDT...FOR THE FOLLOWING
COUNTIES...
IN SOUTHWEST ARKANSAS...
HOWARD...LITTLE RIVER AND SEVIER...
IN SOUTHEAST OKLAHOMA...
MCCURTAIN...
IN NORTHEAST TEXAS...
RED RIVER AND BOWIE...
INCLUDING THE FOLLOWING LOCATIONS...
ALLEENE...ARKINDA...ASHDOWN...ATHENS...BEN LOMOND...DE QUEEN...
DIERKS...FOREMAN...GILLHAM...HORATIO...LOCKESBURG...OGDEN...
RICHMOND...UMPIRE...WILTON...WINTHROP...BOGATA...BOXELDER...
DALBY SPRINGS...DE KALB...HOOKS AND NEW BOSTON...
AT 1159 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A LINE OF STRONG THUNDERSTORM...NEAR THE OKLAHOMA AND
ARKANSAS STATE LINE...EXTENDING SOUTHWEST TO NEAR CLARKVILLE TEXAS.
THESE STORMS ARE MOVING TO THE EAST SOUTHEAST NEAR 50 MPH.
PEA SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THESE STORMS.
VIILocal storm report, Oct 23, 12:20 AM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1220 AM CDT SUN OCT 23 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1155 PM TSTM WND GST 5 SW IDABEL 33.85N 94.88W
10/22/2011 M64 MPH MCCURTAIN OK MESONET
MEASURED AT THE IDABEL MESONET STATION.
&&
15The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 23, 12:12 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Morris, Red River, Titus | 63 min |
| Oct 23, 12:33 AM CDT | Severe Thunderstorm Warning | SHV | Bowie | 23 min |
| Oct 23, 12:59 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Camp, Cass, Franklin, Harrison, Marion and 4 more | 61 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2011Every severe thunderstorm warning in 2011
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.