Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 90, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 15, 2012, 6:47 PM CDT for Pike County, Illinois; Pike County, Missouri. It was in force for 28 min. 2 reports 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 15, 2012, 6:47 PM CDT (23:47 UTC)
- Expired
- Apr 15, 2012, 7:15 PM CDT
- In force
- 28 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Pike County, IL, Pike County, MO
The radar
The St Louis radar (KLSX), 112 km from the middle of the area, began a volume at 23:49 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 15, 6:55 PM CDT | TSTM WND DMG | 1 Nw Rockport, IL | SEVERAL TREES WITH TOPS RIPPED OFF...LARGE MACHINE SHED AND A COUPLE OF SMALLER SHEDS BLOWN DOWN...SEVERAL TREES AND POWER LINES BLOWN DOWN. |
| Apr 15, 6:57 PM CDT | TSTM WND GST 55 | Atlas, IL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 15, 4:42 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.8 hours before the alert went out and 195 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
- 17 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 1124 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 404 m²/s²
- 0-3 km storm-relative helicity
- 425 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
415
WUUS53 KLSX 152347
SVRLSX
ILC149-MOC163-160015-
/O.NEW.KLSX.SV.W.0090.120415T2347Z-120416T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
647 PM CDT SUN APR 15 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
PIKE COUNTY IN WEST CENTRAL ILLINOIS...
NORTH CENTRAL PIKE COUNTY IN NORTHEAST MISSOURI...
* UNTIL 715 PM CDT
* AT 644 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR LOUISIANA...
AND MOVING NORTHEAST AT 55 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
* LOCATIONS IMPACTED INCLUDE...
PITTSFIELD...PIKE...ATLAS...BARRY...GRIGGSVILLE...ROCKPORT...NEW
CANTON...SUMMER HILL...EL DARA...NEW HARTFORD...MARTINSBURG...
BAYLIS...NEW SALEM...FISHHOOK...DETROIT...VALLEY CITY AND PERRY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT
OR SMALL INTERIOR ROOM.
&&
LAT...LON 3977 9060 3975 9061 3972 9064 3968 9063
3964 9060 3936 9112 3951 9127 3976 9097
3976 9092 3980 9092 3984 9087
TIME...MOT...LOC 2347Z 233DEG 47KT 3949 9110
HAIL...<.75IN
WIND...60 MPH
$$
TRUETT2 follow-up statements
824
WWUS53 KLSX 160003
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
703 PM CDT SUN APR 15 2012
MOC163-160013-
/O.CAN.KLSX.SV.W.0090.000000T0000Z-120416T0015Z/
PIKE MO-
703 PM CDT SUN APR 15 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL PIKE COUNTY IN
NORTHEAST MISSOURI IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3977 9060 3972 9064 3969 9064 3964 9060
3942 9100 3947 9106 3949 9106 3954 9110
3955 9115 3957 9117 3959 9117 3976 9097
3976 9092 3980 9092 3984 9087
TIME...MOT...LOC 0003Z 230DEG 44KT 3962 9093
$$
ILC149-160015-
/O.CON.KLSX.SV.W.0090.000000T0000Z-120416T0015Z/
PIKE IL-
703 PM CDT SUN APR 15 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR PIKE COUNTY IN
WEST CENTRAL ILLINOIS UNTIL 715 PM CDT...
AT 702 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTH OF
ATLAS...AND MOVING NORTHEAST AT 55 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
PITTSFIELD...GRIGGSVILLE...BAYLIS...NEW SALEM...PERRY...VALLEY
CITY...DETROIT AND FISHHOOK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT
OR SMALL INTERIOR ROOM.
&&
LAT...LON 3977 9060 3972 9064 3969 9064 3964 9060
3942 9100 3947 9106 3949 9106 3954 9110
3955 9115 3957 9117 3959 9117 3976 9097
3976 9092 3980 9092 3984 9087
TIME...MOT...LOC 0003Z 230DEG 46KT 3962 9093
HAIL...<.75IN
WIND...60 MPH
$$
TRUETT970
WWUS53 KLSX 160017
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
717 PM CDT SUN APR 15 2012
ILC149-160028-
/O.EXP.KLSX.SV.W.0090.000000T0000Z-120416T0015Z/
PIKE IL-
717 PM CDT SUN APR 15 2012
...THE SEVERE THUNDERSTORM WARNING FOR PIKE COUNTY IN WEST CENTRAL
ILLINOIS HAS EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 12 MIDNIGHT.
LAT...LON 3977 9060 3972 9064 3969 9064 3964 9060
3942 9100 3947 9106 3949 9106 3954 9110
3955 9115 3957 9117 3959 9117 3976 9097
3976 9092 3980 9092 3984 9087
TIME...MOT...LOC 0003Z 230DEG 46KT 3962 9093
$$
TRUETTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 3:50 AM CDT | Wind Advisory | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 10 more | 17 hr |
| Apr 14, 9:00 PM CDT | River Flood Warning | LSX | Franklin | 3 days |
| Apr 15, 4:24 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Cole, Moniteau | 36 min |
| Apr 15, 5:37 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Montgomery | 23 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Severe Thunderstorm Warnings in Missouri, 2012Every severe thunderstorm warning in 2012
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.