Alert archive / Illinois / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 120, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 2, 2001, 5:22 PM CDT for Hancock County, McDonough County, Illinois. It was in force for 38 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 2, 2001, 5:22 PM CDT (22:22 UTC)
- Expired
- Aug 2, 2001, 6:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Hancock County, IL, McDonough County, IL
The radar
The Quad Cities radar (KDVN), 134 km from the middle of the area, began a volume at 22:23 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 |
|---|---|---|---|
| Aug 2, 5:46 PM CDT | Thunderstorm Wind 52 E | Dallas City, IL | Thunderstorm winds downed utility poles. Reported by a trained spotter. |
| Aug 2, 5:50 PM CDT | Thunderstorm Wind 52 E | Countywide, IL | Thunderstorm winds downed trees and utility poles in the Hamilton and Carthage areas. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 2, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.4 hours before the alert went out and 137 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
- 2814 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 991 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Aug 2, 2:15 PM CDT, 3 hours 7 minutes earlier.
Area forecast discussion, Aug 2, 2:15 PM CDT, 3 hours 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 215 PM CDT THU AUG 2 2001 CURRENT DATA SHOWS FRONT HAS ESSENTIALLY WASHED OUT OVER THE CWA WITH JUST NUMEROUS OUTFLOW BOUNDARIES PRESENT. THIS WILL DRIVE THE IMMEDIATE SHORT TERM IN TERMS OF CONVECTION. CURRENT TSRA COMPLEX IS MAINTAINING A STEADY STATE DUE TO A RICH ENVIRONMENT OF MOISTURE/HEAT. 12Z MODELS SLIGHT MINNESOTA HIGH EASTWARD WHILE UPPER RIDGE RETROGRESS INTO THE PLAINS. ONCE REACHING THE PLAINS RIDGE AXIS REMAINS IN PLACE INTO THE EXTENDED PERIOD. MODELS DROP DEW POINTS OFF QUICKLY BUT AM HAVING TROUBLE BELIEVING THIS WILL HAPPEN AS QUICKLY AS MODELS SUGGEST. AREAS THAT DID RECEIVE SIGNIFICANT PRECIP IN NORTHERN PART OF CWA HAVE A FAIRLY GOOD CHANCE OF SEEING SOME FOG DEVELOPMENT TONIGHT/EARLY FRIDAY MORNING. CURRENT TEMPS/DEW POINTS ARE BARELY GETTING TO ADVISORY CRITERIA SO WILL ALLOW ADVISORY TO DROP WITH NEW PACKAGE BUT MENTION HEAT INDICES IN BODY OF ZONES. TEMP WISE...GUIDANCE IS SIMILAR ON MINS BUT FAN/MAV ARE COOLER ON MAXES. WARMER FWC MAXES LOOK BETTER. HEAT INDICES TO REMAIN BELOW ADVISORY CRITERIA FOR FRIDAY AS WELL BUT WILL MENTION IN ZONES. EXTENDED nWISE...RIDGE TO REMAIN IN PLACE WITH NOT MUCH CHANCE OF RAIN. DEW POINTS MAY DROP A LITTLE BIT BUT NOT MUCH. .DVN... IA...NONE. IL...NONE. MO...NONE.
In the hours before
Local storm report, Aug 2, 4:10 PM CDT, 1 hour 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
410 PM CDT THU AUG 02 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0349 PM BETTENDORF IA FUNNEL CLOUD
08/02/01 SCOTT REPORTED BY LAW
ENFORCEMENT OFFICIAL.
FUNNEL OVER RIVER*
MOVING SOUTHEAST
0350 PM MOLINE IL FUNNEL CLOUD
08/02/01 ROCK ISLAND REPORTED BY STORM
SPOTTER.Local storm report, Aug 2, 4:34 PM CDT, 48 minutes before
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</html>Local storm report, Aug 2, 4:39 PM CDT, 43 minutes before
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</html>Local storm report, Aug 2, 4:51 PM CDT, 31 minutes before
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</html>Local storm report, Aug 2, 5:18 PM CDT, 4 minutes before
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</html>Local storm report, Aug 2, 5:20 PM CDT, 2 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 |
|---|---|---|---|---|
| Aug 2, 2:02 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jones | 43 min |
| Aug 2, 3:09 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Scott | 51 min |
| Aug 2, 3:18 PM CDT | Severe Thunderstorm Warning | DVN | Muscatine | 42 min |
| Aug 2, 3:39 PM CDT | Severe Thunderstorm Warning | DVN | Mercer | 51 min |
| Aug 2, 4:14 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 46 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.