Hail in Illinois, April 5, 2001

Name: Hail in Illinois, April 5, 2001
Start: 2001-04-05T20:24
End: 2001-04-05T20:35
Location: Illinois

April 5, 2001 · NWS LSX · 3 events in 1 county or zone

Storm spotters and emergency management officials reported hail up to 1 1/4 inch in diameter across parts of Brown County.

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

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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 3

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.

Storm spotters and emergency management officials reported hail up to 1 1/4 inch in diameter across parts of Brown County.

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 5, 2:30 PM CST, 5 hours 54 minutes earlier.

Area forecast discussion, Apr 5, 2:30 PM CST, 5 hours 54 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
330 PM CDT THU APR 5 2001

STG TSTMS CONT TO DVLP OVR NERN KS NWRN MO AND MOV NEWD INTO SWRN IA
ALNG STNRY FNT EXTDG FM WRN IA SW THRU SERN NE SWRN KS AND AHD OF WK
SHRTWV TROF MOVG NEWD THRU WRN IA.  NRN MO APRS TO BE MAIN FOCUS FOR
CONVECTION AS THE STNRY FNT SHIFTS SEWD ACRS NRN KS AND SRN IA LTR
TGT...AND AS WRMFNT CONTS TO MOV NEWD THRU NERN MO W CNTRL IL LATE
THIS AFTN INTO THIS EVENING.  ETA MDL DEPICTS K INDICES INCRSG TO 30
TO 35 ALNG SFC BNDRY ALNG IA MO BRDR LTR TGT AND EARLY FRI MRNG.
BEST 850 MB WAA...THETA E ADVCTN AND MOISTURE CNVG ALSO ACRS NRN MO
ON NOSE OF 30-40 KT SWLY LOW LVL FLOW.  UPR DIVERGENCE ALSO NOTED
OVR IA ARND 12Z FRI IN RGT ENTRANCE REGION OF JT STRK MOVG THRU NRN
GRT LKS REGION.  SEE LTL FRCG FOR CONVECTION FURTHER S ACRS CNTRL
SRN MO TGT AND FRI IN WRM SECTOR.  SHOULD SEE A LINE OF CONVECTION
RACE E-NEWD THRU CWFA FRI NGT AHD OF WK SFC TROF/DRY LINE.  ETA MDL
HAS A N-S STRIPE OF RELATIVELY HI K INDICES ARND 25-30...AND
NEGATIVE LOW-MID LVL DELTA THETA E VALUES DEPICING CONVECTIVE
INSTABILITY FRI NGT WITH DRY INTRUSION.  ETA MDL ALSO DEPICTS FAIRLY
STG THETA E ADVCTN AND MOISTURE CNVG ON NOSE OF 75 KT SLWY LLJ AT
06Z SAT.  EVEN OUTSIDE CONVECTION GRADIENT WNDS WL BE STG FRI NGT
AND SAT AS INTENSE UPR AND SFC SYSTEM PULLS NEWD ACRS THE NRN PLAINS
STATES.  WL GO ABV GUIDANCE ON MAX TEMPS ON FRI WITH STG SWLY LOW
LVL WNDS AND PLENTY OF BRKS IN CLOUDS ESPECIALLY OVR THE SRN PTN OF
THE CWFA.  SHOULD BE WRMR THAN TDA AND TEMPS GETTING CLOSE TO 80
DGRS THIS AFTN OVR CNTRL MO.

.STL...NONE

GKS

The radar

The Lincoln radar (KILX), 121 km away, was scanning. The volume nearest the first event began at 02:23 UTC.

Open the radar archive at this moment

Event by event

3 hail. Local standard time, as filed.

Hail, Brown

When: April 5, 8:24 PM CST
Where: Brown County, 3 mi SE of Mt Sterling
Measured: 0.75 in hail
Reported by: TRAINED SPOTTER
Coordinates: 39.950, -90.733

Hail, Brown

When: April 5, 8:31 PM CST
Where: Brown County, 3 mi SE of Mt Sterling
Measured: 1.25 in hail
Reported by: TRAINED SPOTTER
Coordinates: 39.950, -90.733

Hail, Brown

When: April 5, 8:35 PM CST
Where: Brown County, Versailles
Measured: 0.75 in hail
Reported by: EMERGENCY MANAGER
Coordinates: 39.883, -90.650

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

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

The same day elsewhere

Every storm in Illinois in 2001 Every state in 2001 This day in weather history Warnings in Illinois, April 2001

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: 5243813, 5243814, 5243815.