Alert archive / Illinois / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 46, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 30, 2017, 12:05 PM CDT for 4 counties in Illinois; Saint Charles County, Missouri. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2017, 12:05 PM CDT (17:05 UTC)
- Expired
- Mar 30, 2017, 12:45 PM CDT
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Calhoun County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Saint Charles County, MO
The radar
The St Louis radar (KLSX), 38 km from the middle of the area, began a volume at 17:07 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.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 5.1 hours before the alert went out and 207 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 347 m²/s²
- 0-3 km storm-relative helicity
- 373 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
881
WUUS53 KLSX 301705
SVRLSX
ILC013-061-083-117-MOC183-301745-
/O.NEW.KLSX.SV.W.0046.170330T1705Z-170330T1745Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1205 PM CDT THU MAR 30 2017
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southeastern Calhoun County in southwestern Illinois...
Central Greene County in southwestern Illinois...
West central Macoupin County in southwestern Illinois...
Jersey County in southwestern Illinois...
North central St. Charles County in east central Missouri...
* Until 1245 PM CDT.
* At 1205 PM CDT, a severe thunderstorm was located near Grafton,
moving northeast at 40 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Jerseyville, White Hall, Carrollton, Roodhouse, Greenfield,
Grafton, Elsah, Old Kane, Kemper, Kane, Medora, Wrights, Fieldon,
Batchtown, Chesterfield, Rockbridge, Brussels, Otterville, Fidelity
and Delhi.
This also includes Pere Marquette State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3926 8998 3886 9048 3884 9056 3885 9061
3888 9066 3891 9069 3892 9069 3893 9070
3894 9066 3899 9068 3950 9037
TIME...MOT...LOC 1705Z 215DEG 35KT 3895 9055
HAIL...0.88IN
WIND...60MPH
$$
Carney2 follow-up statements
287
WWUS53 KLSX 301720
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1220 PM CDT THU MAR 30 2017
ILC013-MOC183-301730-
/O.CAN.KLSX.SV.W.0046.000000T0000Z-170330T1745Z/
Calhoun IL-St. Charles MO-
1220 PM CDT THU MAR 30 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CALHOUN AND NORTH
CENTRAL ST. CHARLES COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3926 8998 3895 9037 3896 9041 3897 9046
3897 9049 3895 9052 3897 9055 3900 9057
3903 9057 3905 9059 3907 9058 3911 9061
3950 9037
TIME...MOT...LOC 1720Z 215DEG 35KT 3907 9044
$$
ILC061-083-117-301745-
/O.CON.KLSX.SV.W.0046.000000T0000Z-170330T1745Z/
Greene IL-Macoupin IL-Jersey IL-
1220 PM CDT THU MAR 30 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR CENTRAL GREENE...WEST CENTRAL MACOUPIN AND JERSEY COUNTIES...
At 1220 PM CDT, a severe thunderstorm was located near Grafton,
moving northeast at 40 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Jerseyville, White Hall, Carrollton, Roodhouse, Greenfield, Grafton,
Elsah, Old Kane, Kemper, Kane, Medora, Wrights, Fieldon,
Chesterfield, Rockbridge, Otterville, Fidelity, Delhi, Belltown and
Berdan.
This also includes Pere Marquette State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3926 8998 3895 9037 3896 9041 3897 9046
3897 9049 3895 9052 3897 9055 3900 9057
3903 9057 3905 9059 3907 9058 3911 9061
3950 9037
TIME...MOT...LOC 1720Z 215DEG 35KT 3907 9044
HAIL...0.88IN
WIND...60MPH
$$
Carney999
WWUS53 KLSX 301740
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1240 PM CDT THU MAR 30 2017
ILC061-083-117-301748-
/O.EXP.KLSX.SV.W.0046.000000T0000Z-170330T1745Z/
Greene IL-Macoupin IL-Jersey IL-
1240 PM CDT THU MAR 30 2017
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GREENE...WEST CENTRAL
MACOUPIN AND JERSEY COUNTIES WILL EXPIRE AT 1245 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
and gusty winds are still possible with this thunderstorm.
A severe thunderstorm watch remains in effect until 800 PM CDT for
southwestern Illinois.
Remember, a Severe Thunderstorm warning still remains in effect for
southeast Macoupin County until 100 pm.
LAT...LON 3926 8998 3895 9037 3896 9041 3897 9046
3897 9049 3895 9052 3897 9055 3900 9057
3903 9057 3905 9059 3907 9058 3911 9061
3950 9037
TIME...MOT...LOC 1738Z 215DEG 35KT 3921 9032
$$
CarneyThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 8:55 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 35 min |
| Mar 30, 11:49 AM CDT | Special Weather Statement | LSX | Jersey | 41 min |
| Mar 30, 12:37 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison | 23 min |
| Mar 30, 12:58 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison, Montgomery | 47 min |
| Mar 30, 2:19 PM CDT | Special Weather Statement | LSX | Fayette | 41 min |
| Mar 30, 2:23 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 23 min |
| Mar 29, 7:22 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 27 min |
| Mar 29, 8:34 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Monroe, Ralls | 26 min |
| Mar 29, 8:46 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 59 min |
| Mar 29, 9:57 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole | 36 min |
| Mar 30, 10:55 AM CDT | Special Weather Statement | LSX | Franklin | 35 min |
| Mar 30, 11:12 AM CDT | Special Weather Statement | LSX | Saint Charles, Saint Louis | 33 min |
| Mar 30, 11:25 AM CDT | Special Weather Statement | LSX | Saint Charles | 35 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2017Severe Thunderstorm Warnings in Missouri, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.