Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 27, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 7, 2021, 6:38 PM CDT for Adams County, Brown County, Illinois. It was in force for 17 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
- Apr 7, 2021, 6:38 PM CDT (23:38 UTC)
- Expired
- Apr 7, 2021, 6:55 PM CDT
- In force
- 17 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Adams County, IL, Brown County, IL
The radar
The Lincoln radar (KILX), 122 km from the middle of the area, began a volume at 23:39 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 |
|---|---|---|---|
| Apr 7, 6:40 PM CDT | TSTM WND DMG | Camp Point, IL | EM REPORTING CAMP POINT FIRE DEPARTMENT RESPONDING TO DOWNED TREES ON POWER LINES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.6 hours before the alert went out and 177 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
- 7 J/kg
- Mixed-layer CIN
- -292 J/kg
- Mixed-layer LCL
- 1268 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
790
WUUS53 KLSX 072338
SVRLSX
ILC001-009-080015-
/O.NEW.KLSX.SV.W.0027.210407T2338Z-210408T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
638 PM CDT Wed Apr 7 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northeastern Adams County in west central Illinois...
Brown County in west central Illinois...
* Until 715 PM CDT.
* At 638 PM CDT, severe thunderstorms were located along a line
extending from near Carthage to near Clayton to near Barry, moving
northeast at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Mount Sterling, Camp Point, Clayton, Golden, Buckhorn, Versailles,
Loraine, Woodville, Coatsburg, Mound Station, Columbus, Ripley, La
Prairie, Paloma, Kellerville, Coopertown and Chatton.
This also includes Siloam Springs State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4019 9091 4011 9091 4010 9070 4008 9070
4008 9067 4005 9068 4002 9063 4003 9061
4001 9062 4000 9060 3998 9061 3998 9055
3990 9056 3988 9058 3988 9097 4000 9122
4020 9129
TIME...MOT...LOC 2338Z 208DEG 38KT 4039 9120 4006 9101 3969 9099
HAIL...0.75IN
WIND...60MPH
$$
MRM2 follow-up statements
124
WWUS53 KLSX 072350
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
650 PM CDT Wed Apr 7 2021
ILC001-009-080015-
/O.CON.KLSX.SV.W.0027.000000T0000Z-210408T0015Z/
Adams IL-Brown IL-
650 PM CDT Wed Apr 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTHEASTERN ADAMS AND BROWN COUNTIES...
At 650 PM CDT, severe thunderstorms were located along a line
extending from Burnside to near Augusta to near Beverly, moving
northeast at 50 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Mount Sterling, Camp Point, Clayton, Golden, Loraine, Woodville,
Mound Station, Ripley, La Prairie, Coopertown and Chatton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4019 9091 4011 9091 4010 9070 4008 9070
4008 9067 4005 9068 4002 9063 4003 9061
4001 9062 4000 9060 3998 9061 3998 9055
3990 9056 3988 9058 3999 9101 4020 9129
TIME...MOT...LOC 2350Z 206DEG 44KT 4053 9111 4020 9092 3983 9090
HAIL...0.75IN
WIND...60MPH
$$
MRM581
WWUS53 KLSX 072355
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
655 PM CDT Wed Apr 7 2021
ILC001-009-080005-
/O.CAN.KLSX.SV.W.0027.000000T0000Z-210408T0015Z/
Adams IL-Brown IL-
655 PM CDT Wed Apr 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ADAMS AND BROWN
COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been cancelled.
LAT...LON 4019 9091 4011 9091 4010 9070 4008 9070
4008 9067 4005 9068 4002 9063 4003 9061
4001 9062 4000 9060 3998 9061 3998 9055
3990 9056 3988 9058 3999 9101 4020 9129
TIME...MOT...LOC 2354Z 208DEG 38KT 4057 9108 4024 9089 3987 9087
$$
MRMThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 5:09 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 19 min |
| Apr 7, 6:27 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Monroe, Saint Clair | 49 min |
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.