Alert archive / Illinois / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 21, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 20, 2005, 7:01 PM CDT for Henderson County, Illinois; Des Moines County, Iowa. It was in force for 60 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
- Apr 20, 2005, 7:01 PM CDT (00:01 UTC)
- Expired
- Apr 20, 2005, 8:01 PM CDT
- In force
- 60 min
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
Counties Des Moines County, IA, Henderson County, IL
The radar
The Quad Cities radar (KDVN), 78 km from the middle of the area, began a volume at 00:00 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 00:00Z, 0.0 hours before the alert went out and 82 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
- 5 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 233 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 210001 SVRDVN IAC057-ILC071-210100- /O.NEW.KDVN.SV.W.0021.050421T0001Z-050421T0100Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 701 PM CDT WED APR 20 2005 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN DES MOINES COUNTY IN SOUTHEAST IOWA HENDERSON COUNTY IN WEST CENTRAL ILLINOIS THIS INCLUDES THE CITY OF OQUAWKA * UNTIL 800 PM CDT * AT 658 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 9 MILES NORTH OF OQUAWKA...AND MOVING SOUTH AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OQUAWKA AND ROZETTA BY 720 PM CDT GLADSTONE AND 6 MILES WEST OF BIGGSVILLE BY 735 PM CDT THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY FROM WINDOWS. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM FLOODING. LAT...LON 4107 9085 4107 9099 4081 9115 4078 9085 $$ MCCLURE
4 follow-up statements
000 WWUS53 KDVN 210013 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 711 PM CDT WED APR 20 2005 IAC057-ILC071-210100- /O.CON.KDVN.SV.W.0021.000000T0000Z-050421T0100Z/ DES MOINES IA-HENDERSON IL- 711 PM CDT WED APR 20 2005 ...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 800 PM CDT FOR NORTHERN HENDERSON AND NORTHEASTERN DES MOINES COUNTIES... AT 710 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL NEAR BIG RIVER STATE FOREST...OR ABOUT 7 MILES NORTH OF OQUAWKA...MOVING SOUTH AT 15 MPH. AT 658 PM CDT...A TRAINED SPOTTER REPORTED QUARTER SIZE HAIL IN KEITHSBURG. THE SEVERE THUNDERSTORM WILL BE NEAR... BIG RIVER STATE FOREST NOW BALD BLUFF BY 720 PM CDT DELABAR STATE PARK BY 725 PM CDT ROZETTA AND OQUAWKA BY 730 PM CDT GLADSTONE BY 745 PM CDT BIGGSVILLE BY 755 PM CDT THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY FROM WINDOWS. THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM FLOODING. LAT...LON 4107 9085 4107 9099 4082 9112 4078 9085 $$ MCCLURE
000 WWUS53 KDVN 210015 CCA SVSDVN SEVERE WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE QUAD CITIES IA IL 711 PM CDT WED APR 20 2005 IAC057-ILC071-210100- /O.CON.KDVN.SV.W.0021.000000T0000Z-050421T0100Z/ DES MOINES IA-HENDERSON IL- 711 PM CDT WED APR 20 2005 ...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 800 PM CDT FOR HENDERSON AND EASTERN DES MOINES COUNTIES... AT 710 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL NEAR BIG RIVER STATE FOREST...OR ABOUT 7 MILES NORTH OF OQUAWKA...MOVING SOUTH AT 15 MPH. AT 658 PM CDT...A TRAINED SPOTTER REPORTED QUARTER SIZE HAIL IN KEITHSBURG. THE SEVERE THUNDERSTORM WILL BE NEAR... BIG RIVER STATE FOREST NOW BALD BLUFF BY 720 PM CDT DELABAR STATE PARK BY 725 PM CDT ROZETTA AND OQUAWKA BY 730 PM CDT GLADSTONE BY 745 PM CDT BIGGSVILLE BY 755 PM CDT THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY FROM WINDOWS. THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM FLOODING. LAT...LON 4107 9085 4107 9099 4082 9112 4078 9085 $$ MCCLURE
000 WWUS53 KDVN 210024 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 723 PM CDT WED APR 20 2005 IAC057-210031- /O.CAN.KDVN.SV.W.0021.000000T0000Z-050421T0100Z/ DES MOINES IA- 723 PM CDT WED APR 20 2005 ...THE SEVERE THUNDERSTORM WARNING FOR DES MOINES COUNTY IS CANCELLED... THE THUNDERSTORM WHICH HAS PRODUCED LARGE HAIL HAS MOVED INTO HENDERSON COUNTY AND NO LONGER POSES A THREAT TO DES MOINES COUNTY. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. LAT...LON 4107 9085 4106 9093 4082 9099 4079 9083 $$ ILC071-210100- /O.CON.KDVN.SV.W.0021.000000T0000Z-050421T0100Z/ HENDERSON IL- 723 PM CDT WED APR 20 2005 ...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 800 PM CDT FOR CENTRAL HENDERSON COUNTY... AT 721 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM WITH A HISTORY OF PRODUCING QUARTER SIZE HAIL NEAR BALD BLUFF...OR ABOUT 6 MILES NORTHEAST OF OQUAWKA...MOVING SOUTH AT 25 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... ROZETTA AND DELABAR STATE PARK BY 727 PM CDT OQUAWKA BY 730 PM CDT GLADSTONE BY 740 PM CDT BIGGSVILLE BY 745 PM CDT THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY FROM WINDOWS. THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM FLOODING. LAT...LON 4107 9085 4106 9093 4082 9099 4079 9083 $$ MCCLURE
000 WWUS53 KDVN 210101 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 802 PM CDT WED APR 20 2005 ILC071-210112- /O.EXP.KDVN.SV.W.0021.000000T0000Z-050421T0100Z/ HENDERSON IL- 802 PM CDT WED APR 20 2005 ...THE SEVERE THUNDERSTORM WARNING FOR HENDERSON COUNTY EXPIRES AT 800 PM CDT... THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER HAS WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4107 9085 4106 9093 4082 9099 4079 9083 $$ MCCLURE
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 7:35 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 42 min |
| Apr 21, 3:30 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 30 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2005Severe Thunderstorm Warnings in Iowa, 2005Every severe thunderstorm warning in 2005
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.