Alert archive / Illinois / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 38, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 28, 2020, 4:02 PM CDT for Bureau County, Illinois. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 28, 2020, 4:02 PM CDT (21:02 UTC)
- Expired
- Apr 28, 2020, 4:30 PM CDT
- In force
- 28 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Bureau County, IL
The radar
The Quad Cities radar (KDVN), 91 km from the middle of the area, began a volume at 21:03 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, 9.0 hours before the alert went out and 84 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
- 1308 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 27, 6:37 PM CDT, 21 hours 25 minutes earlier.
Area forecast discussion, Apr 27, 6:37 PM CDT, 21 hours 25 minutes before
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</html>The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 4:08 PM CDT | Special Weather Statement | DVN | Cedar | 37 min |
| Apr 28, 4:28 PM CDT | Special Weather Statement | DVN | Cedar | 47 min |
| Apr 28, 3:37 PM CDT | Special Weather Statement | DVN | Bureau | 23 min |
| Apr 28, 3:56 PM CDT | Special Weather Statement | DVN | Hancock | 49 min |
| Apr 28, 3:57 PM CDT | Special Weather Statement | DVN | Bureau | 63 min |
| Apr 28, 4:42 PM CDT | Special Weather Statement | DVN | McDonough | 48 min |
| Apr 28, 6:02 PM CDT | Special Weather Statement | DVN | Henry | 43 min |
| Apr 28, 6:54 PM CDT | Special Weather Statement | DVN | Whiteside | 36 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2020Every severe thunderstorm warning in 2020
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.