Remnant outflow boundaries from thunderstorms that developed across northeast Texas during the overnight hours of Sunday, July 19th, allowed for additional scattered showers and thunderstorms to develop during the daylight hours of Monday, July 20th, and spread east across the remainder of east Texas, southwest Arkansas. and north Louisiana.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SHV wrote it up.
Remnant outflow boundaries from thunderstorms that developed across northeast Texas during the overnight hours of Sunday, July 19th, allowed for additional scattered showers and thunderstorms to develop during the daylight hours of Monday, July 20th, and spread east across the remainder of east Texas, southwest Arkansas. and north Louisiana. Weak upper level disturbances in the northwest flow aloft, and adequate daytime heating allowed for an unstable air mass as these storms propagated east along additional outflow boundaries, such that scattered strong to severe thunderstorms were observed across portions of southwest Arkansas and north Louisiana during the afternoon. Periodic large hail, and strong, damaging winds resulted from some of these severe thunderstorms, with several reports of downed trees noted.
The local office's own words before the first event, 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 the first event at Jul 20, 9:29 AM CST, 3 hours 8 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SHREVEPORT LA 1029 AM CDT MON JUL 20 2009 .DISCUSSION... SHORTWAVES GALORE SHOWING UP ON WV THIS MORNING WITH THE STRONGEST OVER NORTH CENTRAL TEXAS RIDING SOUTHWARD IN THE THE UNUSUALLY STRONG NW FLOW. THETA E RIDGE AXIS ANALYZED AT 14Z FROM HGX AREA NORTHWARD ALONG THE US 59 CORRIDOR. CORRESPONDINGLY LAPS CAPE VALUES ARE HIGHEST IN THIS REGION. DIFFUSE FRONTAL BOUNDARY IS LYING EAST OF I49 FROM AROUND BTR NORTHWARD THROUGH MLU...AND IS GETTING HARDER TO FIND. SHOWERS AND STORM CLUSTERS APPEAR IRRADIC IN WHERE THEY DEVELOP AND FORM ESPECIALLY EAST AND NORTHEAST OF THE REGION. VISIBLE SAT SHOWS MOST OF THE SHV CWA IN THE CLEAR WITH STORMS AND CLOUDS SURROUNDING AND GIVEN THIS CLEARING AND MODEST SOUNDING THIS MORNING...I WILL INCREASE POPS SLIGHTLY ACROSS EAST TEXAS ALONG AND NEAR THE THETA E AXIS WHERE INSTABILITY APPEARS GREATEST. OTHERWISE EVERYTHING ELSE APPEARS ON TRACK. MONDAY NIGHT INTO TUESDAY AFTERNOON APPEARS TO BE THE MOST ACTIVE WITH A MUCH STRONGER SHORT WAVE DROPPING SOUTH OUT OF THE PLAINS TONIGHT INTO OUR REGION. THE QUESTION STILL REMAINS AS TO HOW MUCH OF THE COMPLEX HOLDS TOGETHER AS IT MOVES THROUGH TUESDAY. TIMING WILL BE KEY SINCE EARLY MORNING CLOUDINESS WOULD KEEP MOST OF THE AREA STABLE..WHEREAS A SLOWER SYSTEM ALLOWS FOR SOME HEATING TO OCCUR. THE NEW MET GUIDANCE IS MOST BULLISH BETWEEN 18 AND 00Z FOR SHV AND HIGHEST AT 18Z FOR DEQ WITH HIGH QPF. FOR NOW...WILL LEAVE TONIGHT ALONE UNTIL MORE GUIDANCE COMES IN. && .AVIATION... VFR FLIGHT CONDITIONS ARE EXPECTED TO PREVAIL THROUGH MUCH OF THE FORECAST PERIOD. HOWEVER THERE WILL BE A CHANCE TO SEE CONVECTION OVER MANY SITES THROUGH THE PERIOD. VCTS HAVE BEEN SEEN THIS MORNING ACROSS EAST TX TERMINALS. THESE ARE BEGINNING TO DECAY...BUT THEY ARE EXPECTED TO AGAIN REDEVELOP BY AROUND 18Z...AS WELL AS SPREAD EAST TO GIVE ISOLATED TO SCATTERED COVERAGE OVER THE ENTIRE FOUR STATE REGION FOR THIS AFTERNOON INTO EARLY THIS EVENING. IF AFFECTED BY A STORM FLIGHT CONDITIONS COULD BE BRIEFLY AFFECTED TO GIVE MVFR TO IFR CONDITIONS. AN UPPER LEVEL DISTURBANCE IS EXPECTED TO MOVE INTO THE REGION FROM THE NORTHWEST TONIGHT INTO TUESDAY MORNING...WHICH WILL AGAIN BRING MORE CONVECTION TO THE FOUR STATE REGION DURING THE OVERNIGHT HOURS INTO TUESDAY. OTHERWISE EXPECT SE WINDS OF AROUND 5 TO 10 KTS TO PREVAIL. /22/ && .PRELIMINARY POINT TEMPS/POPS... SHV 90 71 88 72 89 / 30 40 60 40 40 MLU 89 69 86 71 88 / 20 40 60 50 60 DEQ 90 70 83 66 88 / 30 40 60 30 20 TXK 90 71 85 69 89 / 30 50 60 30 20 ELD 90 69 84 68 87 / 20 40 70 50 40 TYR 92 73 88 72 90 / 40 30 40 40 20 GGG 91 72 87 71 89 / 40 30 40 40 30 LFK 92 72 90 72 90 / 40 40 40 40 40 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...NONE. LA...NONE. OK...NONE. TX...NONE. && 04/22
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1138 AM CDT MON JUL 20 2009 ARZ050-051-059>061-OKZ077-211645- SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MCCURTAIN- 1138 AM CDT MON JUL 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST ARKANSAS AND SOUTHEAST OKLAHOMA. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED THUNDERSTORMS WILL BE POSSIBLE TODAY ALONG AND NORTH OF THE INTERSTATE 30 CORRIDOR...AS UPPER LEVEL DISTURBANCES CONTINUE MOVING THROUGH THE REGION. WHILE NO SEVERE STORMS ARE EXPECTED... THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS AROUND 35 MILES AN HOUR AND HAIL SMALLER THAN THREE QUARTERS OF AN INCH. STRONG THUNDERSTORMS WILL BE POSSIBLE BETWEEN MIDNIGHT TONIGHT AND SUNRISE TUESDAY...AS A COMPLEX OF THUNDERSTORMS APPROACHES THE REGION. THESE STORMS COULD PRODUCE WIND GUSTS AROUND 50 MILES AN HOUR AND HAIL SMALLER THAN THREE QUARTERS OF AN INCH. AN ISOLATED SEVERE STORM CANNOT BE RULED OUT. HOWEVER...A LACK OF STRONG INSTABILITY SHOULD LIMIT THE SEVERE WEATHER RISK. IF SEVERE STORMS OCCUR...THE MAIN SEVERE WEATHER RISK WILL LIKELY BE DAMAGING WINDS IN EXCESS OF 60 MILES AN HOUR. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... STRONG THUNDERSTORMS WILL BE POSSIBLE INTO TUESDAY...AS A COMPLEX OF STORMS CONTINUES MOVING THROUGH THE FOUR STATE REGION. LOCALIZED HEAVY RAIN AND GUSTY WINDS WILL BE POSSIBLE. OVERALL...THOUGH...THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER APPEARS LOW THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL COULD BE NEEDED BETWEEN MIDNIGHT AND 7 AM WEDNESDAY IF SEVERE WEATHER DEVELOPS. OTHERWISE...ACTIVATION SHOULD NOT BE REQUIRED. ARZ070-LAZ001-002-010-011-017-018-TXZ096-097-108>112-124>126- 136>138-149>153-165>167-211645- MILLER-CADDO-BOSSIER-DE SOTO-RED RIVER-SABINE LA-NATCHITOCHES- BOWIE-FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH- GREGG-HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA- SAN AUGUSTINE-SABINE TX- 1138 AM CDT MON JUL 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST ARKANSAS...NORTHWEST LOUISIANA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED THUNDERSTORMS WILL BE POSSIBLE THROUGH TONIGHT ACROSS EAST TEXAS AND NORTHWEST LOUISIANA...GENERALLY ALONG AND WEST OF THE INTERSTATE 49 CORRIDOR. WHILE NO SEVERE STORMS ARE EXPECTED... THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS AROUND 35 MILES AN HOUR AND HAIL SMALLER THAN THREE QUARTERS OF AN INCH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... STRONG THUNDERSTORMS WILL BE POSSIBLE INTO TUESDAY...AS A COMPLEX OF STORMS CONTINUES MOVING THROUGH THE FOUR STATE REGION BRINGING HEAVY RAIN AND GUSTY WINDS. OVERALL...THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER APPEARS LOW THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL COULD BE NEEDED BETWEEN MIDNIGHT AND 7 AM WEDNESDAY IF SEVERE WEATHER DEVELOPS. OTHERWISE...ACTIVATION SHOULD NOT BE REQUIRED. ARZ071>073-LAZ003>006-012>014-019>022-211645- LAFAYETTE-COLUMBIA-UNION AR-WEBSTER-CLAIBORNE-LINCOLN-UNION LA- BIENVILLE-JACKSON-OUACHITA-WINN-GRANT-CALDWELL-LA SALLE- 1138 AM CDT MON JUL 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA AND NORTHWEST LOUISIANA. .DAY ONE...THIS AFTERNOON AND TONIGHT... ISOLATED THUNDERSTORMS WILL BE POSSIBLE TODAY ACROSS SOUTH CENTRAL ARKANSAS AND NORTH LOUISIANA...GENERALLY ALONG AND EAST OF THE INTERSTATE 49 CORRIDOR. THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE TONIGHT AS A SERIES OF DISTURBANCES MOVE THROUGH THE REGION. WHILE NO SEVERE STORMS ARE EXPECTED...THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS AROUND 35 MILES AN HOUR AND HAIL SMALLER THAN THREE QUARTERS OF AN INCH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... STRONG THUNDERSTORMS WILL BE POSSIBLE INTO TUESDAY...AS A COMPLEX OF STORMS CONTINUES MOVING THROUGH THE FOUR STATE REGION. OVERALL...THOUGH...THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER APPEARS LOW THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL WILL NOT BE NEEDED THROUGH TONIGHT. 04
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1241 PM CDT MON JUL 20 2009
TXZ126-138-201830-
HARRISON-MARION-
1241 PM CDT MON JUL 20 2009
...SIGNIFICANT WEATHER ALERT...
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 130 PM CDT...FOR THE FOLLOWING
COUNTIES...
IN NORTHEAST TEXAS...
MARION AND HARRISON...
INCLUDING THE FOLLOWING LOCATIONS...
BEREA AND HARLETON...
AT 1239 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS ARE TRACKING
A STRONG THUNDERSTORM 8 MILES NORTH OF HARLETON...OR 21 MILES
NORTHWEST OF MARSHALL...MOVING NORTHEAST AT 20 MPH.
PEA SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
121 PM CDT MON JUL 20 2009
ARZ050-059-201915-
LITTLE RIVER-SEVIER-
121 PM CDT MON JUL 20 2009
...SIGNIFICANT WEATHER ALERT...
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 215 PM CDT...FOR THE FOLLOWING
COUNTIES...
IN SOUTHWEST ARKANSAS...
LITTLE RIVER AND SEVIER...
INCLUDING THE FOLLOWING LOCATIONS...
ALLEENE...ARKINDA...ASHDOWN...BEN LOMOND...FOREMAN...HORATIO...
WILTON AND WINTHROP...
AT 121 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS ARE TRACKING
A STRONG THUNDERSTORM NEAR ALLEENE...OR 9 MILES NORTHEAST OF
FOREMAN...MOVING EAST AT 5 MPH.
PEA SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.The Western Arkansas radar (KSRX), 139 km away, was scanning. The volume nearest the first event began at 18:23 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
A 66 mph wind gusts was reported by ASOS at the Helms Sevier County Airport just west of DeQueen, Arkansas.
Nickel sized hail busted out a windshield south of Lockesburg, Arkansas.
Numerous trees were snapped in a forested area south of US 371 with trees facing northeast closer to the intersection of US 371 and Hempstead 290. Trees were snapped along Hempstead 347 near US 371 and facing northwest. A large oak tree fell on a home along Hempstead 347 punching a large hole in the southwest corner of the home. Further northwest, several pieces of tin were peeled from a chicken house |along Hempstead 348. South of US 371 and west of the downburst centerpoint,|an old pickup truck was picked up and thrown approximately 75 yards due west over a fence. Maximum envelope of wind damage was 1.25 miles.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arkansas in 2009Every state in 2009This day in weather historyWarnings in Arkansas, July 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 188076, 188078, 188119.