Alert archive / Illinois / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 6, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 5, 2001, 10:49 AM CDT for McDonough County, Illinois. It was in force for 56 min. 4 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Apr 5, 2001, 10:49 AM CDT (15:49 UTC)
- Expired
- Apr 5, 2001, 11:45 AM CDT
- In force
- 56 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County McDonough County, IL
The radar
The Lincoln radar (KILX), 116 km from the middle of the area, began a volume at 15:51 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 5, 10:50 AM CDT | Hail 0.88 | Fandon, IL | Emergency management reported nickel sized hail. |
| Apr 5, 11:03 AM CDT | Hail 1 | Macomb, IL | A trained storm spotter reported quarter sized hail. |
| Apr 5, 11:18 AM CDT | Hail 1.75 | Macomb, IL | A trained storm spotter reported golf ball sized hail. |
| Apr 5, 11:28 AM CDT | Hail 0.75 | Macomb, IL | A trained storm spotter reported penny sized hail. |
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 nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 3.8 hours before the alert went out and 130 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
- 1525 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 240 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KDVN 051550 SVRMLI ILC109-051645- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1049 AM CDT THU APR 5 2001 THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MCDONOUGH COUNTY IN WEST CENTRAL ILLINOIS * UNTIL 1145 AM CDT * AT 1048 AM CDT...DOPPLER RADAR AND SPOTTERS INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL 7 MILES WEST OF INDUSTRY...OR 11 MILES SOUTH OF MACOMB...MOVING EAST AT 15 MPH. * THE SEVERE THUNDERSTORM IS EXPECTED TO BE NEAR... INDUSTRY BY 1110 AM CDT. THIS SEVERE THUNDERSTORM HAS A HISTORY OF PRODUCING HAIL UP TO 1 INCH IN DIAMETER. TAKE COVEgR IN A STURDY STRUCTURE UNTIL THE STORM PASSES. LAT...LON 4061 9086 4023 9086 4022 9032 4062 9035 DMD
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 5, 3:08 AM CDT, 7 hours 41 minutes earlier.
Area forecast discussion, Apr 5, 3:08 AM CDT, 7 hours 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 230 PM CDT WED APR 4 2001 A FRONT DRAPED ACROSS SOUTHERN KANSAS AND MISSOURI HAS BEGUN TO SHIFT NORTHWARD...BUT VERY LITTLE PRECIPITATION IS CURRENTLY NOTED ALONG THE FRONT. MOIST 60 DEGREE DEWPOINTS ARE OBSERVED ALONG AND SOUTH OF THE FRONT...WITH THE MAIN LOW PRESSURE CENTER OVER SOUTHEAST COLORADO. THE EASTERLY FLOW OVER CWA HAS VEERED IN THE LAST 12-24 HOURS...AS THE RIDGE OVER THE GREAT LAKES SHIFTS TO THE EAST. PRESSURE FALLS ARE ALSO OCCURRING OVER A LARGE PORTION OF THE UPPER MIDWEST. UPPER LEVEL CHARTS INDICATING THE 850 FRONT IS ALREADY AS FAR NORTH AS THE SOUTHERN FRINGES OF THE CWA...WITH 10+ DEWPOINTS FINALLY AS FAR NORTH AS SOUTHERN IOWA. 30KT LLJ OBSERVED ON EASTERN KS PROFILER. 00Z MODELS APPEAR TO HAVE INITIALIZED REASONABLY WELL...AND ARE FAIRLY SIMILAR ON THE MAIN FEATURES THROUGH THE FORECAST. ONCE AGAIN...THE QPF FORECAST ON ANY OF THE MODELS IS NOT IN LINE WITH ONGOING PRECIPITATION. THE MODELS ARE BREAKING OUT PRECIPITATION SOONER THAN IT ACTUALLY OCCURRS LATELY...AND WILL HAVE TO WATCH THIS CAREFULLY TO SEE IF IT TURNS INTO A SPRINGTIME TREND. WILL BE GOING WITH A COMBINATION OF THE ETA AND AVN. PREFER THE ETA FOR THE HANDLING OF THE SURFACE FRONT AS IT COMES NORTH TODAY...IT DOES NOT BRING THE FRONT QUITE SO FAR NORTH BY MORNING AS THE AVN. WE SHALL BE IN THE WARM SECTOR FOR MOST OF THE DAY...AND AS I THINK BOTH MODELS ARE BEING TOO BULLISH WITH THE PRECIPITATION...WILL GO WITH WARMER TEMPS THAN IN GOING ZONES...CLOSER TO AVN TEMPS. TONIGHT...THE PRECIPITATION SHOULD CONTINUE...AS THE FRONT SHIFT BACK SOUTH AGAIN ON THE BACK SIDE OF A WEAK WAVE THAT DEVELOPS. FEEL THERE WILL BE MORE THUNDER WITH THIS FRONTAL PASSAGE THAN THE EARLIER ONE...AND WILL WORD AS SUCH IN THE ZONES. TEMPS MORE CONSISTENT IN THE GUIDANCE THAN THEY HAVE BEEN LATELY...AND AGREE FAIRLY WELL WITH GOING ZONES... SO WILL NOT TWEEK. FRIDAY AND FRIDAY NIGHT...THE FRONT SHIFTS BACK NORTH AGAIN AS THE MAIN LOW PRESSURE SYSTSEM FINALLY MOVES OUT OF THE LEE OF THE ROCKIES...AND THE MAIN UPPER LEVEL LOW SWINGS OUT ONTO THE PLAINS. THIS COULD BE A PRETTY IMPRESSIVE EVENT...AND IT WILL NEED MONITORING. SPC ALREADY HAS US IN A SLIGHT RISK...AND WILL GO WITH SIMILAR WORDING TO GOING ZONES. DONT EXPECT TO MAKE ANY CHANGES TO GOING EXTENDED FORECAST...THOUGH WILL TAKE A QUICK LOOK AT THE MRF BEFORE SENDING ZPF. .DVN... IA...NONE. IL...NONE. MO...NONE. LRE
In the hours before
Local storm report, Apr 5, 8:48 AM CDT, 2 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
848 AM CDT THU APR 05 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0845 AM BRIGHTON IA .5 INCH HAIL
04/05/01 WASHINGTON REPORTED BY LAW
ENFORCEMENT OFFICIAL.Special weather statement, Apr 5, 9:08 AM CDT, 1 hour 41 minutes before
IAZ087-051600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 908 AM CDT THU APR 5 2001 ...SMALL STREAM FLOOD ADVISORY UNTIL 12 PM FOR JEFFERSON COUNTY IN IOWA... AT 905 AM...THE JEFFERSON COUNTY SHERIFF DEPARTMENT REPORTED FULL STREAMS...CREEKS...AND DITCHES IN NORTHERN JEFFERSON COUNTY. LOOK FOR CONTINUED RISES...AND POTENTIAL MINOR STREAM FLOODING...AS THE HEAVY RAIN WHICH FELL EARLIER THIS MORNING CONTINUES FEEDING INTO THE LARGER STREAMS CREEKS IN JEFFERSON COUNTY. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MPH...AND WILL EXIT JEFFERSON COUNTY BY 920 AM. BE ON THE LOOKOUT RISES ON STREAMS... CREEKS...AND DITCHES IN NORTHEASTERN JEFFERSON COUNTY. ALTHOUGH THE RAIN WILL EXIT THE COUNTY SHORTLY...WATER LEVELS IN STREAMS AND CREEKS WILL LIKELY CONTINUE RUNNING HIGH THROUGH LATER THIS MORNING...BEFORE FALLING. JAZ
Special weather statement, Apr 5, 9:08 AM CDT, 1 hour 41 minutes before
IAZ087-051600- SPECIAL WEATHER STATEMENT...CORRECTION TO FIRST PARAGRAPH LAST LINE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 908 AM CDT THU APR 5 2001 ...SMALL STREAM FLOOD ADVISORY UNTIL 12 PM FOR JEFFERSON COUNTY IN IOWA... AT 905 AM...THE JEFFERSON COUNTY SHERIFF DEPARTMENT REPORTED FULL STREAMS...CREEKS...AND DITCHES IN NORTHERN JEFFERSON COUNTY. LOOK FOR CONTINUED RISES...AND POTENTIAL MINOR STREAM FLOODING...AS THE HEAVY RAIN WHICH FELL EARLIER THIS MORNING CONTINUES FEEDING INTO THE LARGER STREAMS AND CREEKS IN JEFFERSON COUNTY. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MPH...AND WILL EXIT JEFFERSON COUNTY BY 920 AM. BE ON THE LOOKOUT RISES ON STREAMS... CREEKS...AND DITCHES IN NORTHEASTERN JEFFERSON COUNTY. ALTHOUGH THE RAIN WILL EXIT THE COUNTY SHORTLY...WATER LEVELS IN STREAMS AND CREEKS WILL LIKELY CONTINUE RUNNING HIGH THROUGH LATER THIS MORNING...BEFORE FALLING. JAZ
Local storm report, Apr 5, 9:12 AM CDT, 1 hour 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
912 AM CDT THU APR 05 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0909 AM GLADSTONE IL .5 INCH HAIL
04/05/01 HENDERSON REPORTED BY LAW
ENFORCEMENT OFFICIAL.Local storm report, Apr 5, 10:31 AM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1031 AM CDT THU APR 05 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1017 AM 1/2 W BENTLEY IL 1 INCH HAIL
04/05/01 HANCOCK REPORTED BY LAW
ENFORCEMENT OFFICIAL.
HAIL COVERING THE
GROUND IN HALF MILE
SWATH. SNOWPLOWS OUT.Local storm report, Apr 5, 10:41 AM CDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1041 AM CDT THU APR 05 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1040 AM BURLINGTON IA 1 INCH HAIL
04/05/01 DES MOINES REPORTED BY STORM
SPOTTER.The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 8:48 AM CDT | Severe Thunderstorm Warning | DVN | Henderson | 57 min |
| Apr 5, 10:06 AM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough | 54 min |
| Apr 5, 10:43 AM CDT | Severe Thunderstorm Warning | DVN | Henderson | 47 min |
| Apr 5, 11:40 AM CDT | Severe Thunderstorm Warning | DVN | McDonough | 65 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.