Alert archive / Illinois / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 147, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2011, 1:57 PM CDT for Adams County, Illinois. It was in force for 48 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
- May 11, 2011, 1:57 PM CDT (18:57 UTC)
- Expired
- May 11, 2011, 2:45 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Adams County, IL
The radar
The St Louis radar (KLSX), 138 km from the middle of the area, began a volume at 18:58 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 |
|---|---|---|---|
| May 11, 1:58 PM CDT | HAIL 1 | 5 Sw Payson, IL | HAIL RANGED IN SIZE FROM PEA TO QUARTER. LOCATED ALONG HIGHWAY 72 NEAR THE ADAMS AND PIKE COUNTY LINE. |
| May 11, 2:12 PM CDT | HAIL 2 | Payson, IL |
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, 7.0 hours before the alert went out and 203 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
- 2842 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 931 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
689
WUUS53 KLSX 111857
SVRLSX
ILC001-111945-
/O.NEW.KLSX.SV.W.0147.110511T1857Z-110511T1945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
157 PM CDT WED MAY 11 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
* UNTIL 245 PM CDT
* AT 154 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
FALL CREEK...OR 7 MILES NORTHEAST OF HANNIBAL...AND MOVING
NORTHEAST AT 20 MPH.
* LOCATIONS IMPACTED INCLUDE...
PAYSON...BEVERLY...CAMP POINT...CLAYTON...GOLDEN...PLAINVILLE...
BURTON...ADAMS...RICHFIELD...LIBERTY...KINGSTON...PALOMA...
COLUMBUS...KELLERVILLE...COATSBURG...LA PRAIRIE AND CHATTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3976 9092 3976 9136 3978 9137 3978 9136
3980 9137 3983 9141 4019 9110 4019 9092
TIME...MOT...LOC 1857Z 228DEG 16KT 3979 9128
WIND...HAIL 60MPH 1.00IN
$$
MILLER1 follow-up statement
352
WWUS53 KLSX 111916
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
216 PM CDT WED MAY 11 2011
ILC001-111945-
/O.CON.KLSX.SV.W.0147.000000T0000Z-110511T1945Z/
ADAMS IL-
216 PM CDT WED MAY 11 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN ADAMS
COUNTY UNTIL 245 PM CDT...
AT 211 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING 2 INCH DIAMETER HAIL IN PAYSON...AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR PAYSON...OR
11 MILES SOUTHEAST OF QUINCY...MOVING NORTHEAST AT 20 MPH.
LOCATIONS IMPACTED INCLUDE...
BEVERLY...CAMP POINT...CLAYTON...GOLDEN...BURTON...ADAMS...
RICHFIELD...LIBERTY...KINGSTON...COLUMBUS...KELLERVILLE...
COATSBURG...LA PRAIRIE AND CHATTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3976 9092 3976 9128 3984 9129 4019 9110
4019 9092
TIME...MOT...LOC 1916Z 228DEG 16KT 3985 9120
WIND...HAIL 60MPH 1.75IN
$$
MILLERThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 2:06 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 24 min |
| May 11, 2:07 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 38 min |
| May 11, 2:28 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 47 min |
| May 11, 2:31 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 44 min |
| May 11, 2:42 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 48 min |
| May 11, 2:51 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 39 min |
| May 11, 3:15 PM CDT | Severe Thunderstorm Warning | LSX | Brown, Pike | 45 min |
| May 11, 3:30 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 15 min |
| May 11, 4:15 PM CDT | Areal Flood Advisory | LSX | Adams, Pike | 4 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning in 2011
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.