Three separate squall line/bowing segments began impacting the Middle Tennessee area around mid day and ending around midnight. These systems produced mostly damaging straight line winds with some hail.
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 OHX wrote it up.
Three separate squall line/bowing segments began impacting the Middle Tennessee area around mid day and ending around midnight. These systems produced mostly damaging straight line winds with some hail.
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 Nashville, TN wrote its last area forecast discussion before the first event at May 21, 9:12 AM CST, 1 hour 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NASHVILLE TN 1012 AM CDT TUE MAY 21 2013 .UPDATE... UPPER LOW SPINNING OVER THE TX PANHANDLE WILL BE THE MAIN WEATHER MAKER ACROSS THE SOUTHERN CONUS TODAY...INCLUDING MIDDLE TN. DOWNSTREAM OF THIS UPPER LOW IS A BOUNDARY LIT UP WITH CONVECTION FROM SRN OK TO WRN TN. THESE CONVECTIVE COMPLEXES WILL CONTINUE TO PUSH EAST-NORTHEAST BUT THEY SHOULD WEAKEN DUE TO DECENT WARMING ALOFT ACROSS MIDDLE TN. NOT EXPECTING ANY TYPE OF SEVERE WEATHER CHANCES UNTIL AT LEAST THIS AFTERNOON. SPEAKING OF THIS AFTERNOON...PROGGED SOUNDINGS ACROSS SOUTHERN MIDDLE TN INDICATE QUITE A BIT OF INSTABILITY. HOWEVER...WINDS ARE STILL VERY WEAK AND WITH A OVERLY-MOIST SOUNDING...ANY STORM THAT DEVELOPS THIS AFTERNOON WOULD LIKELY BE OF THE PULSE NATURE WITH TORRENTIAL RAINFALL AND POSSIBLY ISOLATED DAMAGING WINDS. THE BIGGER SEVERE WEATHER THREAT WILL COME OVERNIGHT INTO WEDNESDAY MORNING...WHERE STORMS WILL DEVELOP THIS AFTERNOON ACROSS THE SRN PLAINS AND PUSH EAST QUICKLY OVERNIGHT. THE LOW-LEVEL JET WILL KICK INTO GEAR BETWEEN 6-12Z...AND ANY STORMS NEARING THE TN RIVER AT THAT TIME WILL PROVIDE THE BEST CHANCE FOR SEVERE STORMS...WITH DAMAGING WINDS BEING THE MAIN THREAT. REALLY THINK THAT HEAVY RAINFALL AND ISOLATED DAMAGING WINDS ARE OUR BIGGEST CONCERNS THROUGH 18Z TOMORROW...AND STORMS TOWARDS THE DAWN HOUR COULD PROVIDE AN ADDED ISOLATED HAIL THREAT AS WELL. AT THIS TIME...THE TORNADO THREAT SEEMS MINIMAL BUT WE CANNOT RULE IT OUT TOWARDS MORNING WITH THE STRONGEST SHEAR IN PLACE. FOR THE SHORT TERM...LOWERED POPS OVER ERN MIDDLE TN AND INCREASED TEMPS EVERYWHERE...JUST A COUPLE DEGREES OVER THE WEST WHERE CONVECTION WILL OCCUR MIDDAY-EARLY AFTERNOON. UPDATE ALREADY SENT TO WEB. ZONE UPDATE COMING SHORTLY. && .PREV DISCUSSION... /ISSUED 321 AM CDT TUE MAY 21 2013/ SHORT TERM... RADAR IMAGERY THIS MORNING SHOWS AN EXTENSIVE LINE OF SHOWERS AND THUNDERSTORMS FROM THE GREAT LAKES SOUTHWARD INTO WESTERN TENNESSEE...WITH ACTIVITY NOW APPROACHING OUR WESTERN CWA BORDER. ALTHOUGH MCS HAS SHOWN AN OVERALL WEAKENING TREND...SATELLITE IMAGERY SHOWS NEW UPDRAFTS DEVELOPING ALONG LEADING EDGE OF COLD POOL WITH CLOUD TOPS COOLING. LATEST SHORT TERM MODEL GUIDANCE SUCH AS THE 4 KM WRF...HRRR...AND NSSL WRF ALL BRING ACTIVITY INTO OUR WESTERN ZONES IN A FEW HOURS BEFORE DIMINISHING LATER THIS MORNING...AND THUS WILL RAISE POPS SUBSTANTIALLY OVER GUIDANCE FOR THE PRE-FIRST AND FIRST PERIOD OF THE FORECAST. ALSO BUMPED UP CLOUD COVER AND WENT SIGNIFICANTLY BELOW MOS GUIDANCE HIGHS FOR TODAY DUE TO ANTICIPATED CLOUDS/PRECIP. NO SEVERE WEATHER IS EXPECTED WITH THESE STORMS THIS MORNING ALTHOUGH SOME GUSTY WINDS MAY OCCUR. CHANGES TO THE FORECAST ARE LIKELY DEPENDING ON HOW CURRENT ACTIVITY EVOLVES. MODELS INDICATE A SHARP SHORTWAVE TROUGH CURRENTLY SEEN ON WATER VAPOR IMAGERY OVER NEW MEXICO WILL SWING THROUGH THE SOUTHERN PLAINS TODAY...THEN ACROSS THE OHIO VALLEY AND NORTHWEST PART OF OUR FORECAST AREA TUESDAY NIGHT. EXPECTING NUMEROUS SHOWERS AND THUNDERSTORMS TO DEVELOP TO OUR WEST ACROSS ARKANSAS TUESDAY AFTERNOON...THEN SPREAD INTO WESTERN TENNESSEE AND THE NORTHWEST MID STATE TUESDAY EVENING AND ESPECIALLY AFTER MIDNIGHT TUESDAY NIGHT. SPC HAS THE NORTHWEST PART OF THE FORECAST AREA IN A SLIGHT RISK FOR SEVERE STORMS TUESDAY NIGHT...GENERALLY ALONG AND WEST OF A LINE FROM WAYNESBORO TO SPRINGFIELD. APPEARS BEST CHANCE FOR ANY SEVERE WEATHER IN OUR CWA WILL BE IN THE 03Z-12Z TIMEFRAME AS SHORTWAVE TROUGH AXIS MOVES ACROSS...BUT NOCTURNAL TIMING MAY REDUCE THE SEVERE POTENTIAL. FORECAST SOUNDINGS DO SHOW SUBSTANTIAL MLCAPE AND MODERATE DEEP LAYER SHEAR TUESDAY NIGHT...WHICH SUGGESTS POTENTIAL FOR A LOWER END THREAT OF SOME DAMAGING WINDS OR LARGE HAIL. HOWEVER...ANY TORNADO THREAT APPEARS VERY LOW IN OUR FORECAST AREA. MUCH BETTER CHANCES FOR SEVERE STORMS WILL EXIST TO OUR WEST ACROSS ARKANSAS TUESDAY AFTERNOON/EVENING. NOTE THAT MUCH OF THE CWA EAST OF I-65 WILL REMAIN DRY DURING THIS TIME PERIOD. AS SHORTWAVE EXITS THE REGION ON WEDNESDAY...A COLD FRONT WILL PUSH EASTWARD ACROSS THE MID STATE WITH ADDITIONAL SHOWERS AND STORMS ANTICIPATED THROUGH THE DAY. ACTIVITY WILL END FROM WEST TO EAST WEDNESDAY NIGHT AS MUCH COOLER AND DRIER AIR FILTERS IN. BELOW NORMAL TEMPERATURES ARE THEN ANTICIPATED OVER THE WEEKEND AS NORTHWEST FLOW BUILDS IN ALOFT...WITH LOWS IN THE 40S/50S AND HIGHS IN THE 70S. MID STATE LOOKS TO STAY IN A NORTHWEST FLOW PATTERN THROUGH THE REMAINDER OF THE FORECAST PERIOD WITH A GRADUAL WARMING TREND...BUT MAJOR DIFFERENCES EXIST BETWEEN THE GFS/ECMWF NEXT WEEK REGARDING PRECIP CHANCES WITH GFS COMPLETELY DRY BUT ECMWF SHOWING DAILY POPS. HAVE TRENDED TOWARDS THE GFS FOR NOW BUT NOTE THAT EXTENDED FORECAST IS LOW CONFIDENCE. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && AL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NASHVILLE TN 750 AM CDT TUE MAY 21 2013 TNZ005>011-022>034-056>066-075-077>080-093>095-221300- STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON- HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE- SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS- WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE- CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE- GILES- 750 AM CDT TUE MAY 21 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR NORTHWEST MIDDLE TENNESSEE TUESDAY INTO TUESDAY NIGHT...GENERALLY ALONG AND WEST OF A LINE FROM WAYNESBORO TO SPRINGFIELD. AN UPPER LEVEL TROUGH OF LOW PRESSURE WILL SWING ACROSS THE REGION TUESDAY NIGHT. AHEAD OF THIS TROUGH...SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE MID STATE TODAY...WITH ADDITIONAL SHOWERS AND STORMS SPREADING INTO THE AREA OVERNIGHT AS THE TROUGH MOVES ACROSS. SOME STORMS MAY BE STRONG TO SEVERE...WITH DAMAGING WINDS AND LARGE HAIL THE MAIN THREATS. LOCALLY HEAVY RAINFALL AND LOCALIZED FLOODING WILL ALSO BE POSSIBLE WITH THE HEAVIER SHOWERS AND STORMS...WITH THE BIGGEST THREAT FOR HEAVY RAINFALL AND POSSIBLE FLOODING ACROSS NORTHWEST MIDDLE TENNESSEE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER CALL TO ACTION STATEMENT... REPORTS FROM TRAINED WEATHER SPOTTERS MAY BE NEEDED TODAY INTO TONIGHT. SPOTTER THUNDERSTORM REPORTING CRITERIA... TORNADO FUNNEL CLOUD FLOODING HAIL >= 1/2 INCH WINDS > 50 MPH (MEASURED) STRUCTURAL DAMAGE TREES OR POWER LINES DOWN 55
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1020 AM CDT TUE MAY 21 2013
TNZ005-022>024-211600-
BENTON-HOUSTON-HUMPHREYS-STEWART-
1020 AM CDT TUE MAY 21 2013
...SIGNIFICANT WEATHER ADVISORY FOR BENTON...HOUSTON...HUMPHREYS AND
STEWART COUNTIES...
AT 1016 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF STRONG THUNDERSTORMS NEAR SPRINGVILLE...MOVING
EAST AT 50 MPH.
SMALL HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.
LAT...LON 3664 8764 3636 8759 3633 8752 3619 8757
3597 8753 3591 8770 3584 8772 3584 8782
3580 8785 3584 8795 3581 8802 3585 8805
3585 8822 3612 8821 3626 8809 3636 8810
3637 8801 3644 8807 3653 8804 3668 8807
BC11SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NASHVILLE TN 1042 AM CDT TUE MAY 21 2013 TNZ005>011-022>034-056>066-075-077>080-093>095-220000- STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON- HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE- SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS- WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE- CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE- GILES- INCLUDING THE CITIES OF...DOVER...CLARKSVILLE...SPRINGFIELD... GALLATIN...LAFAYETTE...CELINA...BYRDSTOWN...CAMDEN...ERIN... WAVERLY...DICKSON...ASHLAND CITY...NASHVILLE...LEBANON... MOUNT JULIET...HARTSVILLE...CARTHAGE...GAINESBORO...COOKEVILLE... LIVINGSTON...JAMESTOWN...LOBELVILLE...CENTERVILLE...HOHENWALD... FRANKLIN...BRENTWOOD...COLUMBIA...LEWISBURG...MURFREESBORO... WOODBURY...SMITHVILLE...SPARTA...CROSSVILLE...SHELBYVILLE... TULLAHOMA...MANCHESTER...MCMINNVILLE...ALTAMONT...SPENCER... WAYNESBORO...LAWRENCEBURG...PULASKI 1042 AM CDT TUE MAY 21 2013 ...TORRENTIAL RAIN AND STRONG TO SEVERE STORMS POSSIBLE... AREAS OF THUNDERSTORMS HAVE ALREADY DEVELOPED ACROSS THE MID MISSISSIPPI VALLEY AREA AND THE SOUTHERN PLAINS. ONE OF THESE THUNDERSTORM COMPLEXES WILL MOVE INTO MIDDLE TENNESSEE FROM LATE MORNING THROUGH THE AFTERNOON HOURS. THE MAIN THREATS WITH THESE STORMS WILL BE TORRENTIAL RAINFALL AND WIND GUSTS TO 45MPH. SCATTERED STORMS WILL CONTINUE THROUGH THIS AFTERNOON AND EVENING...AND AN ISOLATED SEVERE STORM OR TWO CANNOT BE RULED OUT. HOWEVER...THE BEST CHANCE FOR STRONG TO SEVERE STORMS WILL BE MAINLY TOWARDS DAWN WEDNESDAY AS SEVERE STORMS DEVELOP OVER THE SOUTHERN PLAINS THIS AFTERNOON AND MARCH EASTWARD OVERNIGHT. A LINE OF STRONG TO SEVERE STORMS IS EXPECTED TO APPROACH MIDDLE TENNESSEE VERY LATE TONIGHT INTO THE EARLY MORNING HOURS ON WEDNESDAY...WITH STRONG WINDS AND TORRENTIAL RAINFALL BEING THE MAIN THREATS. ISOLATED LARGE HAIL CANNOT BE RULED OUT...AND AT THIS TIME...A TORNADO THREAT LOOKS VERY LOW. IT SHOULD BE EMPHASIZED THAT ANY THUNDERSTORMS THAT AFFECT MIDDLE TENNESSEE TODAY...TONIGHT AND WEDNESDAY WILL NOT NEARLY BE AS SIGNIFICANT AS WHAT OCCURRED YESTERDAY IN OKLAHOMA. THE BEST CHANCE FOR SEVERE WEATHER WILL BE BETWEEN ROUGHLY 3AM AND 8AM NEAR THE TENNESSEE RIVER...WITH STORMS WEAKENING AS THEY MOVE FURTHER EAST. A THREAT FOR STRONG STORMS WILL STILL EXIST THROUGHOUT THE DAY WEDNESDAY BEFORE THE STORM SYSTEM PUSHES THROUGH THE REGION. AL
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1101 AM CDT TUE MAY 21 2013
TNZ022>026-056-057-211645-
BENTON-CHEATHAM-DICKSON-HICKMAN-HOUSTON-HUMPHREYS-PERRY-
1101 AM CDT TUE MAY 21 2013
...SIGNIFICANT WEATHER ADVISORY FOR BENTON...CHEATHAM...DICKSON...
HICKMAN...HOUSTON...HUMPHREYS AND PERRY COUNTIES...
AT 1058 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM TENNESSEE
RIDGE TO HURRICANE MILLS TO 12 MILES NORTHEAST OF PARSONS...MOVING
EAST AT 50 MPH.
SMALL HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.
LAT...LON 3612 8822 3626 8809 3637 8809 3633 8780
3637 8771 3637 8766 3637 8760 3634 8758
3631 8730 3639 8722 3588 8728 3567 8752
3567 8802 3572 8804 3581 8798 3581 8802
3585 8805 3585 8822
BC11SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1121 AM CDT TUE MAY 21 2013
TNZ056>058-093-211700-
HICKMAN-LEWIS-PERRY-WAYNE-
1121 AM CDT TUE MAY 21 2013
...SIGNIFICANT WEATHER ADVISORY FOR HICKMAN...LEWIS...PERRY AND WAYNE
COUNTIES...
AT 1117 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES
SOUTH OF HURRICANE MILLS TO 11 MILES SOUTHEAST OF DECATURVILLE TO
WALNUT GROVE...MOVING EAST AT 40 MPH.
SMALL HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.
LAT...LON 3500 8798 3529 8799 3530 8802 3539 8803
3541 8798 3545 8805 3550 8798 3561 8804
3570 8803 3572 8732 3568 8731 3559 8736
3554 8729 3546 8728 3545 8729 3546 8745
3542 8745 3539 8757 3504 8758 3500 8761
11SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1143 AM CDT TUE MAY 21 2013
TNZ006-007-025-026-211730-
CHEATHAM-DICKSON-MONTGOMERY-ROBERTSON-
1143 AM CDT TUE MAY 21 2013
...SIGNIFICANT WEATHER ADVISORY FOR CHEATHAM...DICKSON...MONTGOMERY
AND ROBERTSON COUNTIES...
AT 1140 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 14 MILES
NORTHWEST OF ASHLAND CITY TO 7 MILES SOUTHEAST OF MCEWEN...MOVING
NORTHEAST AT 40 MPH.
SMALL HAIL...HEAVY RAINFALL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE
STORMS.
LAT...LON 3624 8703 3605 8714 3605 8718 3597 8720
3596 8721 3596 8728 3599 8753 3601 8755
3610 8754 3665 8716 3665 8682
BCSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1155 AM CDT TUE MAY 21 2013
TNZ056>058-093-211745-
HICKMAN-LEWIS-PERRY-WAYNE-
1155 AM CDT TUE MAY 21 2013
...SIGNIFICANT WEATHER ADVISORY FOR HICKMAN...LEWIS...PERRY AND WAYNE
COUNTIES...
AT 1152 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CENTERVILLE
TO 9 MILES WEST OF HOHENWALD TO OLIVE HILL...MOVING EAST AT 25 MPH.
SMALL HAIL...HEAVY RAINFALL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE
STORMS.
LAT...LON 3546 8805 3550 8798 3559 8803 3569 8796
3584 8772 3592 8767 3595 8756 3599 8753
3596 8721 3573 8723 3561 8736 3554 8729
3545 8729 3546 8745 3542 8745 3539 8757
3534 8758 3521 8798 3539 8803 3541 8798
11The Nashville radar (KOHX), 106 km away, was scanning. The volume nearest the first event began at 16:57 UTC.
25 thunderstorm wind, 5 hail, 1 lightning. Local standard time, as filed.
Hickman County Emergency Management reported three-quarter inch hail falling seven miles south-southwest of Centerville.
The Davidson County Emergency Manager reported over 25 different tree down or power lines down reports across Metro Nashville.
A Twitter report was received reporting trees and powerlines down along a few roads in Franklin.
A report came via Twitter of trees and power lines down along Saddle Wood Drive in Mount Juliet due to gust front winds.
A report was received via Amateur Radio of shingles blown off a home in Mount Juliet from gust front winds.
Severe gust front winds caused a large road construction crane to collapse onto a car that was driving on the highway 109 bridge over the Cumberland River about 2 miles south of Gallatin. The car had two occupants. One was hospitalized with minor injuries. The other was uninjured.
Amateur Radio operator reported nickel sized hail at the Smyrna Airport (KMQY).
The ASOS at the Smyrna Airport (KMQY) measured a wind gust of 76 mph.
A trained spotter reported quarter sized hail three miles north of Lebanon.
A report was received via 911 dispatch of trees down across Smith county.
A trained spotter reported multiple trees down across the city of Carthage.
Local police reported trees downed across Jackson county. Power was also reported out across half the county.
An amateur radio operator reported dime to nickel sized hail falling two miles north of the city of Shelbyville.
Several trees were reported down across the county with multiple power outages.
A roof was blown off a house on Plunk Whitson Road in the Double Springs community.
A roof was blown off of a barn at the intersection of West Gate Road and Highway 70.
Trees were reported down near the intersection of Knights Chapel Road and Shipley Road in northwest of Cookeville.
A roof was reportedly blown off a house on Sugar Creek Road.
Lightning struck a home in Celina causing damage. Type of damage was not specifically stated.
The public reported a tree falling on a house seven miles west-northwest of Livingston due to winds estimated over 50 mph.
An amateur radio operator reported winds in excess of 60 mph near the Sparta Airport. Tree limbs were also reported downed.
Nickel sized hail reported near Muddy Pond by the public.
Trees were reported downed near Dry Valley Road and Buck Mountain Road.
A Twitter report of trees down was reported near the intersection of Dobson Branch Road and Bartlett Road in Cookeville.
A trained spotter reported a tree falling on a house on Old Union Road in the town of Hilham.
A trained spotter reported a tree down on a house on Main Street in Byrdstown. Power outages were also reported in the city.
A trained spotter reported a large tree blocking traffic on Mount Helen Road east of Allardt. The tree caused an accident but there were no injuries.
The county emergency manager reported numerous trees down. A carport was damaged as well due to the winds.
The Sheriff's Department in Perry county reported a tree down on Old Linden Highway near Linden.
Local law enforcement reported downed power lines on Gower Road in West Nashville.
A tree and power line were reported down by local broadcast media on Page Road in Belle Meade.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2013Every state in 2013This day in weather historyWarnings in Tennessee, May 2013
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: 454114, 454118, 454121, 454142, 454143, 454145, 454146, 454148, 454150, 454158, 454151, 454320, 454153, 454310, 454302, 454303, 454305, 454321, 454311, 454312, 454314, 454316, 454318, 454319, 454322, 454307, 454323, 454324, 454325, 454945, 454949.