Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 109, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 28, 2021, 3:54 PM CDT for Fayette County, Montgomery County, Illinois. It was in force for 38 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 28, 2021, 3:54 PM CDT (20:54 UTC)
- Expired
- Jun 28, 2021, 4:32 PM CDT
- In force
- 38 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Fayette County, IL, Montgomery County, IL
The radar
The Lincoln radar (KILX), 119 km from the middle of the area, began a volume at 20:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 28, 4:03 PM CDT | TSTM WND DMG | 1 N Ramsey, IL | A COUPLE OF 10 INCH IN DIAMETER PINE TREES SNAPPED AND NUMEROUS TREE LIMBS DOWN AT THE RAMSEY LAKE GOLF COURSE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.9 hours before the alert went out and 127 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
- 386 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 948 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
067
WUUS53 KLSX 282054
SVRLSX
ILC051-135-282145-
/O.NEW.KLSX.SV.W.0109.210628T2054Z-210628T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
354 PM CDT Mon Jun 28 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northern Fayette County in south central Illinois...
Southeastern Montgomery County in south central Illinois...
* Until 445 PM CDT.
* At 354 PM CDT, a severe thunderstorm was located near Ramsey,
moving northeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Ramsey around 405 PM CDT.
This includes Interstate 70 in Illinois between exits 61 and 63.
This also includes Ramsey Lake State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3894 8924 3899 8926 3903 8925 3903 8928
3921 8936 3929 8914 3922 8914 3922 8881
3904 8881
TIME...MOT...LOC 2054Z 244DEG 22KT 3915 8921
HAIL...0.75IN
WIND...60MPH
$$
Glass3 follow-up statements
405
WWUS53 KLSX 282102
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
402 PM CDT Mon Jun 28 2021
ILC051-135-282145-
/O.CON.KLSX.SV.W.0109.000000T0000Z-210628T2145Z/
Fayette IL-Montgomery IL-
402 PM CDT Mon Jun 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHERN FAYETTE AND EAST CENTRAL MONTGOMERY COUNTIES...
At 402 PM CDT, a severe thunderstorm was located near Ramsey, moving
northeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Ramsey around 405 PM CDT.
This also includes Ramsey Lake State Park.
This includes Interstate 70 in Illinois between exits 61 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3894 8924 3899 8926 3903 8925 3925 8925
3929 8914 3922 8914 3922 8881 3904 8881
TIME...MOT...LOC 2102Z 244DEG 22KT 3917 8915
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
Glass858
WWUS53 KLSX 282115
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
415 PM CDT Mon Jun 28 2021
ILC135-282124-
/O.CAN.KLSX.SV.W.0109.000000T0000Z-210628T2145Z/
Montgomery IL-
415 PM CDT Mon Jun 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MONTGOMERY COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3896 8915 3922 8920 3922 8881 3904 8881
TIME...MOT...LOC 2114Z 246DEG 21KT 3919 8906
$$
ILC051-282145-
/O.CON.KLSX.SV.W.0109.000000T0000Z-210628T2145Z/
Fayette IL-
415 PM CDT Mon Jun 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHERN FAYETTE COUNTY...
At 414 PM CDT, a severe thunderstorm was located near Ramsey, moving
northeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Wrights Corner.
This also includes Ramsey Lake State Park.
This includes Interstate 70 in Illinois between exits 61 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3896 8915 3922 8920 3922 8881 3904 8881
TIME...MOT...LOC 2114Z 246DEG 21KT 3919 8906
HAIL...0.75IN
WIND...60MPH
$$
Glass174
WWUS53 KLSX 282132
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
432 PM CDT Mon Jun 28 2021
ILC051-282142-
/O.CAN.KLSX.SV.W.0109.000000T0000Z-210628T2145Z/
Fayette IL-
432 PM CDT Mon Jun 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN FAYETTE COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 3896 8915 3922 8920 3922 8881 3904 8881
TIME...MOT...LOC 2129Z 244DEG 22KT 3924 8893
$$
GlassThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:54 AM CDT | Flash Flood Watch | LSX | Adams, Brown, Pike | 39 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.