Tornadoes and Flash Flooding in Illinois, April 27, 2026

Name: Tornadoes and Flash Flooding in Illinois, April 27, 2026
Start: 2026-04-27T04:41
End: 2026-04-27T19:35
Location: Illinois

April 27, 2026 · NWS LSX · 40 events in 8 counties and zones

Multiple rounds of severe thunderstorms passed through the region for nearly the entirety of April 27th. The afternoon round was expected to be the most volatile, with an environment primed for high-end severe weather reflected by an areawide SPC Moderate Risk.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 3
Property damage: $100,000
Crop damage: None recorded
Events: 40

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.

What happened

The episode as NWS LSX wrote it up.

What forecasters said that day

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 St. Louis, MO wrote its last area forecast discussion before the first event at Apr 27, 12:57 AM CST, 3 hours 44 minutes earlier. Its key messages:

While periods of storms are expected through Monday morning, the most potent thunderstorms will occur this afternoon and evening.
Thunderstorms this afternoon and evening will be capable of damaging wind gusts, large hail, and strong tornadoes.
A period of cool, calm weather is expected mid-week through the weekend.

Area forecast discussion, Apr 27, 12:57 AM CST, 3 hours 44 minutes before

Area Forecast Discussion
National Weather Service Saint Louis MO
157 AM CDT Mon Apr 27 2026

.KEY MESSAGES...

- While periods of storms are expected through Monday morning, the most
  potent thunderstorms will occur this afternoon and evening.

- Thunderstorms this afternoon and evening will be capable of
  damaging wind gusts, large hail, and strong tornadoes.

- A period of cool, calm weather is expected mid-week through the
  weekend.

&&

.SHORT TERM... (Through Tuesday Night)
Issued at 155 AM CDT Mon Apr 27 2026

Storms across southeastern Missouri continue to butt up against an
instability gradient draped from north to south across Missouri.
The warm air advection feeding these storms will also push greater
instability slowly northeastward through this morning, though
propagation vectors will favor convection continuing to move east-
southeastward generally away from the CWA or into an unfavorable
environment. Additionally, the low-level jet refocusing across
Kansas will continue to support the downward trend in convection
across southeastern Missouri early this morning. Any linger storms
over the next couple of hours will be capable mainly of large hail,
though there is also a very low damaging wind and tornado threat for
storms that remain surface based.

Our attention turns to the storms over eastern Kansas that are
propagating eastward with the nose of the low-level jet. With the
nose of this low-level jet edging into northeastern Missouri later
this morning, the focus for these storms will spread into portions
of the CWA north of I-70. Vertical thermal profiles suggest that this
convection will be elevated, mitigating a threat of damaging wind
gusts and/or tornadoes. However, with around 40 kts of effective
shear and building MUCAPE, there is a low chance for isolated
instances of large hail.

How long this convection lingers is uncertain, although guidance
trends have been toward a lull in convective activity in the wake of
this convection and that associated with a cold front during the
late afternoon and evening. Ahead of the front, the warm sector
remains capped through much of the afternoon per a majority of
deterministic soundings. Although, any remnant outflow or
differential heating boundary from early day convection may serve as
enough of a forcing mechanism to spawn discrete convection during
the afternoon as lift from an approaching shortwave increases over
the region. If this convection does form, it will be in an
environment characterized by 2,000-2,500 J/kg of SBCAPE and roughly
50 kts of deep-layer shear. This will favor supercells capable of
all hazards, with long curved hodographs favoring strong tornadoes,
especially if storms are able to latch on to any remnant boundaries
across the CWA.

Where the environment isn't contaminated from earlier rounds of
convection, additional updrafts are expected along the cold front as
it enters the area 4-5pm. Forcing from the front paired with lift
from the shortwave will lead to numerous updrafts along the front.
While this will be occurring within a similar environment detailed
prior, the number of updrafts paired with them occurring along the
front may lead to destructive interactions and congealing into line
segments and/or clusters. While this will tend to limit a strong
tornado threat, storms will still be capable of all severe hazards.
Convection is expected to depart the CWA with the front by 9-10pm.

Even with the FROPA Monday evening, the threat for convection will
continue on Tuesday. Guidance consensus has the front stalling just
south of the CWA early Tuesday and then buckling northward as a
shortwave moves through the Central Plains and into the Midwest
through the day. This shortwave will send a subtle surface
reflection through the Mid South along the front, with a brief
period of warm air advection that will help force elevated
convection for areas mainly along and south of I-70. If the front
can move northward enough, shear profiles and instability amounts
favor supercells capable primarily of large hail across far
southeastern Missouri during the afternoon. Waning instability and
the front continuing southward will bring an end to rain chances
during the evening.

Elmore

&&

.LONG TERM... (Tuesday Night through Sunday)
Issued at 155 AM CDT Mon Apr 27 2026

Both deterministic guidance and ensemble clusters keep upper-level
troughing slowly moving eastward over the eastern CONUS through the
long range forecast period. This will maintain northwesterly flow
over the Middle Mississippi Valley through Saturday as several
rounds of high pressure pass through the region. As a result,
temperatures will run at or below climatological normals into the
weekend and mostly dry weather is expected.

Elmore

&&

.AVIATION...  (For the 06z TAFs through 06z Monday Night)
Issued at 1231 AM CDT Mon Apr 27 2026

Light to moderate rainfall with occasional lightning strikes are
expected at the local terminals through the first several hours of
the TAF period. Thunderstorms currently over Kansas will continue
eastward overnight and through the early morning hours, impacting
KCOU, KJEF, and KUIN during the mid morning hours. There is a low
chance that these storms also impact KSUS, KSTL, and KCPS too,
but confidence is currently greater that they will stay north of
these sites. Yet another round of storms is expected during the
late afternoon and evening along a cold front. These storms will
have the potential to produce hail, erratic strong winds, and
tornadoes. They will be moving quickly, and their window of impact
be much more narrow than the current forecast, which is wider due
to timing uncertainty.

Elmore

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

WFO LSX

Hazardous weather outlook, Apr 27, 1:02 AM CST, 3 hours 39 minutes before

Hazardous Weather Outlook
National Weather Service St Louis MO
202 AM CDT Mon Apr 27 2026

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-280715-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
202 AM CDT Mon Apr 27 2026

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Today and tonight.

Periods of thunderstorms are expected through the day into this
evening. Thunderstorms this afternoon and evening will be capable of
large hail, damaging wind gusts, and tornadoes.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a chance of thunderstorms Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report wind damage, hail occurrence and
size, and tornado occurrence to NWS St. Louis.

Elmore

In the hours before

Local storm report, Apr 27, 2:15 AM CST, 2 hours 26 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
315 AM CDT Mon Apr 27 2026

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

0308 AM     Hail             Irondale                37.84N 90.67W
04/27/2026  M1.25 Inch       Washington         MO   Amateur Radio

&&

Pfahler

Local storm report, Apr 27, 2:45 AM CST, 1 hour 56 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
345 AM CDT Mon Apr 27 2026

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

0336 AM     Hail             3 SE Farmington         37.75N 90.39W
04/27/2026  M1.75 Inch       St. Francois       MO   Public

&&

Pfahler

Local storm report, Apr 27, 3:40 AM CST, 1 hour 1 minute before

Preliminary Local Storm Report
National Weather Service St Louis MO
440 AM CDT Mon Apr 27 2026

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

0307 AM     Hail             Irondale                37.84N 90.67W
04/27/2026  E2.00 Inch       Washington         MO   Public

            Time estimated from radar.

&&

Delia

Local storm report, Apr 27, 3:42 AM CST, 59 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
442 AM CDT Mon Apr 27 2026

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

0333 AM     Hail             1 SW Farmington         37.77N 90.44W
04/27/2026  E2.00 Inch       St. Francois       MO   Public

            Time estimated from radar.

&&

Delia

Local storm report, Apr 27, 3:46 AM CST, 55 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
446 AM CDT Mon Apr 27 2026

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

0333 AM     Hail             Farmington              37.78N 90.43W
04/27/2026  E2.00 Inch       St. Francois       MO   Emergency Mngr

            Time estimated from radar.

&&

Delia

Local storm report, Apr 27, 4:06 AM CST, 35 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
506 AM CDT Mon Apr 27 2026

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

0333 AM     Hail             Farmington              37.78N 90.42W
04/27/2026  M2.00 Inch       St. Francois       MO   Emergency Mngr

            Photo of multiple large hail stones, largest
            is measured at 2 inches. Time estimated from
            radar.

&&

Delia

The radar

The St Louis radar (KLSX), 63 km away, was scanning. The volume nearest the first event began at 10:41 UTC.

Open the radar archive at this moment

Event by event

27 hail, 5 thunderstorm wind, 4 tornado, 3 flash flood, 1 flood. Local standard time, as filed.

Hail, St. Clair

When: April 27, 4:41 AM CST
Where: St. Clair County, 1.75 mi SW of Belleville
Measured: 1 in hail
Reported by: Amateur Radio
Coordinates: 38.500, -90.000

Thunderstorm Wind, Montgomery

When: April 27, 9:38 AM CST
Where: Montgomery County, 7.19 mi NE of Mc Vey
Measured: 50 kt (58 mph) estimated gust
Reported by: Emergency Manager
Coordinates: 39.460, -89.640

Thunderstorm winds blew a semi-truck onto the median of I-55.

Tornado, Madison

When: April 27, 12:41 PM CST to 12:42 PM CST
Where: Madison County, 1.83 mi SW of Marine to 1.58 mi SSW of Marine
Rating: EF0
Path length: 0.33 mi
Path width: 25 yd
Reported by: NWS Storm Survey
Coordinates: 38.759, -89.800

A very brief tornado touched down IL just east of Illinois Route 4 and just north of Lower Marine Road where it collapsed the overhead doors of a metal building and caused minor roof damage to a double wide manufactured home. The tornado lifted shortly after.

Flash Flood, Jersey

When: April 27, 12:49 PM CST
Where: Jersey County, 3.29 mi WSW of Jerseyville to 3.31 mi WSW of Jerseyville
Cause: Heavy Rain
Property damage: $50,000
Reported by: 911 Call Center
Coordinates: 39.110, -90.380

Heavy rain washed out a culvert and a portion of West County Road was washed out.

Thunderstorm Wind, Madison

When: April 27, 12:52 PM CST
Where: Madison County, 1.28 mi WSW of Marine
Measured: 50 kt (58 mph) estimated gust
Reported by: Public
Coordinates: 38.770, -89.800

Thunderstorm winds damaged a shed near Marine.

Hail, Madison

When: April 27, 1:21 PM CST
Where: Madison County, 0.69 mi N of Glen Carbon Crossing
Measured: 1 in hail
Reported by: Trained Spotter
Coordinates: 38.760, -89.970

Flash Flood, Montgomery

When: April 27, 1:45 PM CST
Where: Montgomery County, 0.7 mi SE of Wenonah to 0.77 mi SE of Wenonah
Cause: Heavy Rain
Reported by: Public
Coordinates: 39.322, -89.271

Heavy rain flooded roads along East 23rd Road outside of Nokomis.

Flash Flood, Jersey

When: April 27, 1:59 PM CST
Where: Jersey County, 1.28 mi SW of Newbern to 1.24 mi SW of Newbern
Cause: Heavy Rain
Property damage: $50,000
Reported by: 911 Call Center
Coordinates: 38.985, -90.344

Heavy rain washed out a culvert and damaged Green Acres Road near Elsah.

Hail, Jersey

When: April 27, 4:55 PM CST
Where: Jersey County, 0.54 mi W of Jerseyville
Measured: 1.5 in hail
Reported by: Emergency Manager
Coordinates: 39.120, -90.330

Hail, Jersey

When: April 27, 4:58 PM CST
Where: Jersey County, 1.38 mi N of Jerseyville
Measured: 1 in hail
Reported by: Public
Coordinates: 39.140, -90.320

Hail, Jersey

When: April 27, 5:00 PM CST
Where: Jersey County, 0.54 mi W of Jerseyville
Measured: 2.5 in hail
Reported by: Amateur Radio
Coordinates: 39.120, -90.330

Hail, Madison

When: April 27, 5:50 PM CST
Where: Madison County, 1.08 mi E of Alton
Measured: 1.75 in hail
Reported by: Amateur Radio
Coordinates: 38.900, -90.150

Hail, Madison

When: April 27, 5:52 PM CST
Where: Madison County, 1.28 mi ENE of Fairmont
Measured: 1 in hail
Reported by: Public
Coordinates: 38.930, -90.180

Hail, Madison

When: April 27, 5:54 PM CST
Where: Madison County, 0.88 mi NW of Godfrey
Measured: 1 in hail
Reported by: Trained Spotter
Coordinates: 38.960, -90.190

Hail, Madison

When: April 27, 5:55 PM CST
Where: Madison County, 0.88 mi NE of Fairmont
Measured: 1.5 in hail
Reported by: Public
Coordinates: 38.930, -90.190

Hail, Madison

When: April 27, 5:56 PM CST
Where: Madison County, 0.88 mi SW of Forest Homes
Measured: 2 in hail
Reported by: Trained Spotter
Coordinates: 38.910, -90.090

Hail, Madison

When: April 27, 5:59 PM CST
Where: Madison County, 0.88 mi NW of Milton
Measured: 1 in hail
Reported by: Public
Coordinates: 38.910, -90.130

Hail, Madison

When: April 27, 6:00 PM CST
Where: Madison County, 1.38 mi N of East Alton
Measured: 1.25 in hail
Reported by: Public
Coordinates: 38.890, -90.080

Hail, Madison

When: April 27, 6:03 PM CST
Where: Madison County, (Aln)stl Rgnl Arpt A
Measured: 1.25 in hail
Reported by: Public
Coordinates: 38.900, -90.050

Hail, Madison

When: April 27, 6:03 PM CST
Where: Madison County, (Aln)stl Rgnl Arpt A
Measured: 1.25 in hail
Reported by: Public
Coordinates: 38.900, -90.050

Hail, Madison

When: April 27, 6:07 PM CST
Where: Madison County, 0.88 mi SW of Cottage Hills
Measured: 1.75 in hail
Reported by: Public
Coordinates: 38.910, -90.060

Hail, Macoupin

When: April 27, 6:08 PM CST
Where: Macoupin County, 0.69 mi N of Bunker Hill
Measured: 1 in hail
Reported by: Public
Coordinates: 39.040, -89.950

Hail, Macoupin

When: April 27, 6:09 PM CST
Where: Macoupin County, 0.69 mi S of Bunker Hill
Measured: 1 in hail
Reported by: Public
Coordinates: 39.020, -89.950

Hail, Madison

When: April 27, 6:10 PM CST
Where: Madison County, Dorsey
Measured: 1 in hail
Reported by: Public
Coordinates: 38.970, -90.000

Hail, Madison

When: April 27, 6:10 PM CST
Where: Madison County, (Aln)stl Rgnl Arpt A
Measured: 1.25 in hail
Reported by: Amateur Radio
Coordinates: 38.900, -90.050

Hail, Madison

When: April 27, 6:11 PM CST
Where: Madison County, 1.75 mi SE of Midway
Measured: 1 in hail
Reported by: Public
Coordinates: 38.910, -89.950

Hail, Madison

When: April 27, 6:13 PM CST
Where: Madison County, 2.15 mi E of Midway
Measured: 1.75 in hail
Reported by: Public
Coordinates: 38.930, -89.930

Hail, Montgomery

When: April 27, 6:15 PM CST
Where: Montgomery County, 0.54 mi E of Litchfield Muni Arpt
Measured: 1.5 in hail
Reported by: Emergency Manager
Coordinates: 39.170, -89.660

Flood, Madison

When: April 27, 6:15 PM CST
Where: Madison County, 0.54 mi E of (Aln)stl Rgnl Arpt A
Cause: Heavy Rain
Reported by: Trained Spotter
Coordinates: 38.900, -90.040

A trained spotter reported about 6 inches of standing water on Prairie Street.

Hail, Macoupin

When: April 27, 6:18 PM CST
Where: Macoupin County, 1.48 mi SSE of Sawyerville
Measured: 1 in hail
Reported by: Public
Coordinates: 39.060, -89.810

Hail, Macoupin

When: April 27, 6:20 PM CST
Where: Macoupin County, 0.87 mi SW of Staunton
Measured: 1 in hail
Reported by: Emergency Manager
Coordinates: 39.010, -89.790

Hail, Macoupin

When: April 27, 6:20 PM CST
Where: Macoupin County, 0.69 mi S of Staunton
Measured: 1 in hail
Reported by: Public
Coordinates: 39.010, -89.780

Thunderstorm Wind, Madison

When: April 27, 6:22 PM CST to 6:30 PM CST
Where: Madison County, 0.69 mi N of Hamel to 0.88 mi NE of Hamel
Measured: 61 kt (70 mph) estimated gust
Reported by: Newspaper
Coordinates: 38.890, -89.850

Thunderstorm winds downed a large portion of a tree onto a home in Hamel. A member of the public estimated 70 mph wind gusts were occurring a few minutes later.

Hail, Madison

When: April 27, 6:25 PM CST
Where: Madison County, 1.75 mi NW of Kuhn
Measured: 1 in hail
Reported by: Public
Coordinates: 38.800, -89.900

Hail, Monroe

When: April 27, 6:33 PM CST
Where: Monroe County, 1.76 mi SE of Columbia
Measured: 1 in hail
Reported by: Public
Coordinates: 38.430, -90.180

Thunderstorm Wind, St. Clair

When: April 27, 6:35 PM CST to 6:41 PM CST
Where: St. Clair County, 0.69 mi S of Belleville to 0.88 mi SW of (Blv)scott Afb Belle
Measured: 50 kt (58 mph) estimated gust
Injuries: 3 direct, 0 indirect
Reported by: Emergency Manager
Coordinates: 38.510, -89.980

Thunderstorm winds blew a tree onto a home 2 miles southeast of Belleville. Three individuals sustained injuries. Near Swansea and at Scott Air Force Base, winds downed large tree limbs. A report of an estimated 55 mph wind gust was reported in Swansea, but winds were likely stronger based on the damage.

Tornado, St. Clair

When: April 27, 6:53 PM CST to 6:58 PM CST
Where: St. Clair County, 2.43 mi ENE of (Blv)scott Afb Belle to 2.68 mi ESE of Summerfield
Rating: EF1
Path length: 5.81 mi
Path width: 350 yd
Continued into: Clinton, Il (LSX)
Reported by: NWS Storm Survey
Coordinates: 38.563, -89.808

A tornado touched down just east of Shiloh on Route 4 and just north of I-64 where it broke multiple power poles before continuing east-northeast. Along its path it damaged mostly trees, but did collapse the walls of one farm outbuilding and remove several shingles from one home. The tornado then continued into Clinton County.

Tornado, Clinton

When: April 27, 6:58 PM CST to 7:03 PM CST
Where: Clinton County, 1.85 mi SW of Trenton to 2.11 mi W of Aviston
Rating: EF1
Path length: 3.84 mi
Path width: 100 yd
Reported by: NWS Storm Survey
Coordinates: 38.582, -89.706

The tornado that formed in St. Clair county moved into Clinton county where it passed just southeast of Trenton and Sugar Creek. Along Route 160, the tornado destroyed power poles, damaged the roof of one home, and removed about half of the roof of one farm outbuilding. Along Highline Road, the tornado peeled part of the roof from a barn before dissipating.

Tornado, Clinton

When: April 27, 7:06 PM CST to 7:18 PM CST
Where: Clinton County, 2.38 mi WSW of Germantown to 1.28 mi S of Carlyle
Rating: EF1
Path length: 11.66 mi
Path width: 350 yd
Reported by: NWS Storm Survey
Coordinates: 38.542, -89.573

A tornado developed just southwest of Germantown where it damaged part of the roof of an outbuilding. In Germantown, the tornado produced mostly tree damage. However, it did destroy the roof of one manufactured home and it completely destroyed another. From there, it damaged mostly trees until it reached just south of Beckemeyer. Here, the tornado destroyed one outbuilding and flipped another. The tornado produced more tree damage before dissipating just south of Carlyle.

Thunderstorm Wind, Marion

When: April 27, 7:30 PM CST to 7:35 PM CST
Where: Marion County, Centralia to 0.69 mi S of Centralia
Measured: 50 kt (58 mph) estimated gust
Reported by: Emergency Manager
Coordinates: 38.530, -89.130

Thunderstorm winds downed power lines all over Centralia. Power poles and trees sustained damage as well.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Tornado: A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Illinois in 2026 Every state in 2026 This day in weather history The tornado archive for Illinois, 2026 Warnings in Illinois, April 2026

Sources

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: 1334003, 1334004, 1333978, 1334011, 1334017, 1334007, 1334014, 1334012, 1334018, 1334019, 1334020, 1334021, 1334023, 1334024, 1334025, 1334026, 1334027, 1334029, 1334030, 1334032, 1334033, 1334035, 1334036, 1334037, 1334038, 1334040, 1334041, 1334042, 1334043, 1334044, 1334045, 1334046, 1334051, 1334048, 1334052, 1334055, 1333992, 1333998, 1334002, 1334057.