Alert archive / Iowa / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 29, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at May 17, 2004, 6:57 PM CDT for Benton County, Iowa County, Iowa. It was in force for 63 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 17, 2004, 6:57 PM CDT (23:57 UTC)
- Expired
- May 17, 2004, 8:00 PM CDT
- In force
- 63 min
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
Counties Benton County, IA, Iowa County, IA
The radar
The Des Moines radar (KDMX), 130 km from the middle of the area, began a volume at 23:56 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 |
|---|---|---|---|
| May 17, 7:19 PM CDT | HAIL 0.75 | 2 E Koszta, IA | |
| May 17, 7:32 PM CDT | HAIL 0.75 | 1 N Marengo, IA | 40 TO 50 MPH WINDS |
| May 17, 7:45 PM CDT | HAIL 0.25 | Norway, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 12.0 hours before the alert went out and 350 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
- 92 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 514 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KDVN 172357 SVRDVN IAC011-095-180100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 657 PM CDT MON MAY 17 2004 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN BENTON COUNTY IN EAST CENTRAL IOWA NORTHERN IOWA COUNTY IN EAST CENTRAL IOWA * UNTIL 800 PM CDT * AT 650 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 8 MILES SOUTHWEST OF BELLE PLAINE...OR ABOUT 7 MILES NORTHEAST OF BROOKLYN...AND MOVING EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LUZERNE BY 710 PM CDT 7 MILES NORTH OF MARENGO BY 715 PM CDT BLAIRSTOWN BY 720 PM CDT NORWAY AND NEWHALL BY 735 PM CDT ATKINS BY 745 PM CDT THIS STORM HAS ALREADY PRODUCED WIND DAMAGE AND/OR LARGE HAIL IN POWESHIEK COUNTY...AND IT REMAINS A THREAT. LAT...LON 4188 9239 4172 9237 4184 9184 4206 9184 $$ 08
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 May 17, 3:40 PM CDT, 3 hours 17 minutes earlier.
Area forecast discussion, May 17, 3:40 PM CDT, 3 hours 17 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 340 PM CDT MON MAY 17 2004 .SYNOPSIS... THE SURFACE FRONT HAS NOW SHIFTED SOUTHEAST OF THE CWA THIS AFTERNOON...AND STRETCHES FROM NORTHERN INDIANA...TO EAST CENTRAL KANSAS. IT CONTINUES TO BE THE FOCUS FOR STRONG CONVECTION. THE COMBINATION OF A MID LEVEL SPEED MAX AND DECAYING MCV FROM LAST NIGHTS STORMS OVER SOUTHEAST NEBRASKA HAS ALLOWED INTERMITTENT SHOWERS AND A FEW THUNDERSTORMS NORTH OF THE FRONT. WITH HIGH AMOUNTS OF MOISTURE IN PLACE...EVEN THESE WEAK STORMS HAVE RESULTED IN LOCALIZED HEAVY RAIN...PRIMARILY NEAR AND SOUTHEAST OF THE QUAD CITIES METRO AREA. TEMPERATURES ARE COOL UNDER PRECIP AND LAKE ENHANCED STRATUS...RANGING FROM THE MID 50S NORTHEAST TO LOW 70S SOUTH. .SHORT TERM...(TONIGHT) THE FRONT WILL STALL SOUTH OF THE AREA TONIGHT...AS ANOTHER WAVE EJECTS FROM THE ROCKIES AROUND 06Z. THIS WILL INCREASE WAA ACROSS THE PLAINS LATE TONIGHT...WITH THE BEST LIFT FOUND OVER KANSAS AND NORTHWEST MISSOURI. MODELS DO NOT SHOW MUCH QPF IN THIS AREA...THOUGH MOST OTHER SIGNS POINT TO SCATTERED CONVECTION BREAKING OUT LATE. WITH DECENT THETA-E ADVECTION TAKING PLACE OVER THE SOUTHWEST CWA LATE EVENING THROUGH MORNING...WILL CONTINUE CHANCE POPS SOUTH THE SOUTHWEST HALF TONIGHT. LACK OF A STRONG TRIGGER TONIGHT SHOULD KEEP ANY CONVECTION THAT DOES FORM SCATTERED AND NON SEVERE. NORTHEAST SECTIONS WILL CONTINUE TO ADVECT COOL AND SEASONALLY DRY AIR OFF LAKE MICHIGAN THIS EVENING...ALLOWING TEMPS TO DROP INTO THE UPPER 40S. FARTHER SOUTHWEST...TEMPS WILL BE IN THE 50S WITH COOL NORTHEAST WINDS BECOMING SOUTHEAST LATE. ...ERVIN... (WEDNESDAY THROUGH FRIDAY) MODELS CONTINUE TO AGREE IN THE DEPICTION OF THE OVERALL SYNOPTIC PATTERN THROUGH THE PERIOD. FRONT STALLED ACROSS NRN HALF OF MO PROGGED TO LIFT NORTH THROUGH THE CWA WEDNESDAY. S/W ENERGY MOVING THROUGH THE NRN STREAM...ACROSS SRN CANADA...DRIVES THE FRONT BACK SOUTH THURSDAY...STALLING NEAR THE IA/MO BORDER. FRONT IS FORCED BACK NORTH AGAIN FRIDAY AS TROF OVER AS SRN STREAM RIDGE MOVES E AND SWLY MID LEVEL FLOW SPREADS OVER THE REGION. THIS SCENARIO WILL KEEP THE THREAT OF THE TSRA OVER THE CWA THROUGH THE PERIOD. SPC HAS PLACED A MODERATE RISK OVER MOST OF THE CWA FOR WEDNESDAY/WEDNESDAY NIGHT. THERE WILL BE A RISK OF SEVERE STORMS DURING THE LATE AFTERNOON AND EARLY EVENING HOURS AS THE WARM FRONT LIFTS THROUGH. THE META ALSO SUGGEST A WEAK S/W WILL BE MOVING THOUGH CWA ABOUT THE SAME TIME. BETTER THREAT THOUGH WILL BE LATE WEDNESDAY NIGHT WITH POTENTIAL MCS DEVELOPMENT AHEAD OF SURFACE LOW OVER KANSAS. AT THIS POINT IT LOOKS LIKE INITIATION SHOULD TAKE PLACE OVER NERN KS OR SERN NE JUST NORTH OF CAPPED AIRMASS OVER THE PLAINS. MID LEVEL THICKNESSES WOULD THEN FAVOR AN EASTWARD MOVEMENT ACROSS SRN IA/NRN MO. CAP WILL CONTINUE TO PLAY A ROLE IN DEFINING SRN EXTENT OF CONVECTION THROUGH THE END OF THE WEEK. AS A RESULT...HAVE LIMITED POPS TO SLIGHT CHANCE SOUTH OF THE BOUNDARY THURSDAY AND FRIDAY AND KEPT CHANCE POPS GOING ALONG AND NORTH OF THE BOUNDARY. ...DLF... LONG TERM...(SATURDAY THROUGH TUESDAY)... THE GFS HAS GONE OFF THE DEEP END ON THE 00Z RUN AND PHASES THE NRN AND SRN STREAMS INTO A DEEP TROF OVER THE WRN U.S. BY THE END OF THE WEEKEND THEN FORMS A 531 LOW OVER THE UPPER MS VALLEY BY EARLY WEDNESDAY. THIS IS MUCH DIFFERENT THAN THE SPLIT FLOW AND MID LEVEL RIDGING SHOWN OVER THE CENTRAL U.S. ON THE THE 17/00Z RUN. HAVE OPTED TO GO WITH THE ECMWF SOLUTION...HOLDING A TROF TO THE WEST AND RIDGE OVER THE CENTRAL U.S. ECMWF STILL SHOWS A BOUNDARY IN THE VICINITY SO POP WILL BE CONTINUED THROUGH MOST OF THE PERIOD WITH TEMPS AT OR JUST ABOVE NORMAL. ...DLF... && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. &&
Hazardous weather outlook, May 17, 5:45 AM CDT, 13 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 545 AM CDT MON MAY 17 2004 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-181100- BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO- CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL- HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA- JO DAVIESS IL-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA- MCDONOUGH IL-MERCER IL-MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL- SCOTLAND MO-SCOTT IA-STEPHENSON IL-VAN BUREN IA-WARREN IL- WASHINGTON IA-WHITESIDE IL- 545 AM CDT MON MAY 17 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST IOWA... EAST CENTRAL IOWA...SOUTHEAST IOWA...NORTHWEST ILLINOIS...NORTH CENTRAL ILLINOIS...WEST CENTRAL ILLINOIS AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AHEAD OF A SLOW MOVING COLD FRONT. ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE AS THIS FRONT INTERACTS WITH A MOIST UNSTABLE AIRMASS. THE MAIN THREAT WILL BE HAIL UP TO THE SIZE OF QUARTERS AND WIND GUSTS UP TO 68 MPH. THESE ISOLATED SEVERE STORMS WILL BE MOST LIKELY NORTHWEST OF A LINE FROM WILLIAMSBURG IOWA TO FREEPORT ILLINOIS FROM MID TO LATE AFTERNOON. THE RISK AREA WILL THEN SHIFT TO SOUTHEAST OF THIS LINE FOR THE EVENING HOURS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A LARGE CLUSTER OF THUNDERSTORMS WILL BE POSSIBLE MAINLY SOUTH OF HIGHWAY 34 THROUGH MID MORNING TUESDAY AS A COLD FRONT PUSHES SOUTH OF THE OUTLOOK AREA. THE MAIN THREAT FROM THESE STORMS WILL BE LOCALLY HEAVY RAINFALL AND WIND GUSTS UP TO 40 MPH. THUNDERSTORMS WILL AGAIN BE POSSIBLE OVER THIS SAME AREA TUESDAY NIGHT...THEN ACROSS THE ENTIRE OUTLOOK AREA WEDNESDAY INTO WEDNESDAY NIGHT AS THE FRONT LIFTS BACK NORTH. CHANCES FOR THUNDERSTORMS WILL CONTINUE THURSDAY NIGHT THROUGH SUNDAY AS THE FRONT MEANDERS ACROSS THE AREA. THE MAIN THREAT FROM THUNDERSTORMS THROUGH THIS PERIOD WILL BE REPEATED HEAVY RAINFALL AND ASSOCIATED MINOR FLOODING. A SMALLER THREAT OF SEVERE STORMS WITH LARGE HAIL AND DAMAGING WIND WILL EXIST...ESPECIALLY IN THE LATE AFTERNOON AND EVENING HOURS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON AND TONIGHT. SHEETS
In the hours before
Local storm report, May 17, 6:53 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
653 PM CDT MON MAY 17 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0644 PM TSTM WND DMG HOLY CROSS 42.60N 91.00W
05/17/2004 DUBUQUE IA EMERGENCY MNGR
ROOF BLOWN OFF CHURCH.
0644 PM HAIL HOLY CROSS 42.60N 91.00W
05/17/2004 0.75 INCH DUBUQUE IA EMERGENCY MNGR
0632 PM HAIL 1 SE COLESBURG 42.63N 91.19W
05/17/2004 0.75 INCH DELAWARE IA PUBLIC
&&
14The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 6:29 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 31 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2004Every severe thunderstorm warning in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.