Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 99, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 25, 2021, 4:46 PM CDT for Bureau County, Illinois. It was in force for 29 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
- Aug 25, 2021, 4:46 PM CDT (21:46 UTC)
- Expired
- Aug 25, 2021, 5:15 PM CDT
- In force
- 29 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Bureau County, IL
The radar
The Quad Cities radar (KDVN), 81 km from the middle of the area, began a volume at 21:45 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
Davenport, (KDVN), launched 12:00Z, 9.8 hours before the alert went out and 76 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
- 818 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 1355 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
461 WUUS53 KDVN 252146 SVRDVN ILC011-252215- /O.NEW.KDVN.SV.W.0099.210825T2146Z-210825T2215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Quad Cities IA/IL 446 PM CDT Wed Aug 25 2021 The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Southwestern Bureau County in north central Illinois... * Until 515 PM CDT. * At 446 PM CDT, severe thunderstorms were located along a line extending from Sheffield to near Castleton to near West Jersey, moving east at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Severe thunderstorms will be near... Buda around 455 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with these storms. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4123 8963 4123 8986 4137 8985 4131 8963 TIME...MOT...LOC 2146Z 289DEG 22KT 4136 8976 4115 8975 4099 8987 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs
2 follow-up statements
757 WWUS53 KDVN 252155 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 455 PM CDT Wed Aug 25 2021 ILC011-252215- /O.CON.KDVN.SV.W.0099.000000T0000Z-210825T2215Z/ Bureau IL- 455 PM CDT Wed Aug 25 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR SOUTHWESTERN BUREAU COUNTY... At 455 PM CDT, severe thunderstorms were located along a line extending from Sheffield to Castleton to near Princeville, moving east at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe thunderstorms will remain over mainly rural areas of southwestern Bureau County, including the following locations... Neponset. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. To report severe weather contact your nearest law enforcement agency. They will send your report to the National Weather Service office in the Quad Cities. Continuous cloud to ground lightning is occurring with these storms. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4123 8963 4123 8986 4137 8985 4131 8963 TIME...MOT...LOC 2155Z 289DEG 21KT 4135 8971 4114 8970 4098 8982 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs
274
WWUS53 KDVN 252213
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
513 PM CDT Wed Aug 25 2021
ILC011-252223-
/O.EXP.KDVN.SV.W.0099.000000T0000Z-210825T2215Z/
Bureau IL-
513 PM CDT Wed Aug 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BUREAU COUNTY
WILL EXPIRE AT 515 PM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with these thunderstorms.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.
LAT...LON 4123 8963 4123 8986 4137 8985 4131 8963
TIME...MOT...LOC 2213Z 289DEG 22KT 4131 8957 4110 8956 4094 8968
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 7:22 PM CDT | Special Weather Statement | DVN | Henry | 53 min |
| Aug 25, 3:37 PM CDT | Special Weather Statement | DVN | Henry | 53 min |
| Aug 25, 3:39 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 36 min |
| Aug 25, 3:43 PM CDT | Tornado Warning | DVN | Henry | 17 min |
| Aug 25, 4:11 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 49 min |
| Aug 25, 4:59 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 46 min |
| Aug 25, 6:12 PM CDT | Special Weather Statement | DVN | McDonough | 33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.