Alert archive / Illinois / Flash Flood Warnings in 2023

Flash Flood Warning 3, NWS Quad Cities, IA

May 8, 2023Henry County, Rock Island County, Illinois; Scott County, Iowa

NWS Quad Cities, IA issued this flash flood warning at May 8, 2023, 2:07 AM CDT for Henry County, Rock Island County, Illinois; Scott County, Iowa. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 8, 2023, 2:07 AM CDT (07:07 UTC)
Expired
May 8, 2023, 5:12 AM CDT
In force
3 hr
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
None

Counties Scott County, IA, Henry County, IL, Rock Island County, IL

The radar

The Quad Cities radar (KDVN), 17 km from the middle of the area, began a volume at 07:11 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood 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

Lincoln, IL (KILX), launched 00:00Z, 7.1 hours before the alert went out and 219 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.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2023-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2003 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2023-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -67 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2003 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
822 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-67 m²/s²
0-3 km storm-relative helicity
-65 m²/s²
Significant tornado parameter
-0.6
Supercell composite
-3.3

Open this sounding in Storm Lab

The text

As transmitted.

851 
WGUS53 KDVN 080707
FFWDVN
IAC163-ILC073-161-081300-
/O.NEW.KDVN.FF.W.0003.230508T0707Z-230508T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Quad Cities IA IL
207 AM CDT Mon May 8 2023

The National Weather Service in Quad Cities has issued a

* Flash Flood Warning for...
  Southeastern Scott County in east central Iowa...
  Northwestern Henry IL County in northwestern Illinois...
  East Central Rock Island County in northwestern Illinois...

* Until 800 AM CDT.

* At 207 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Davenport, Moline, Rock Island, Bettendorf, East Moline, Silvis, 
  Eldridge, Colona, Milan, Le Claire, Hampton, Port Byron, Rapids 
  City, Princeton, Long Grove, Cordova, Riverdale, Cleveland, Osborn 
  and Carbon Cliff.

This includes the following highways...
	Interstate 74 in Iowa between mile markers 1 and 5.
	Interstate 280 between mile markers 9 and 18.
	Interstate 80 in Iowa between mile markers 291 and 306.
	Interstate 80 in Illinois between mile markers 1 and 7.
	Interstate 74 in Illinois between mile markers 1 and 4.
	Interstate 88 between mile markers 1 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

&&

LAT...LON 4153 9066 4162 9066 4169 9064 4170 9042
      4169 9023 4168 9023 4166 9019 4165 9017
      4164 9017 4159 9017 4159 9019 4158 9017
      4151 9024 4148 9035 4147 9046 4144 9057
      4148 9064

FLASH FLOOD...RADAR INDICATED

$$

JTS
2 follow-up statements
303 
WGUS73 KDVN 080857
FFSDVN

Flash Flood Statement
National Weather Service Quad Cities IA IL
357 AM CDT Mon May 8 2023

IAC163-ILC073-161-081300-
/O.CON.KDVN.FF.W.0003.000000T0000Z-230508T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Scott IA-Henry IL IL-Rock Island IL-
357 AM CDT Mon May 8 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING 
FOR SOUTHEASTERN SCOTT, NORTHWESTERN HENRY IL AND EAST CENTRAL ROCK 
ISLAND COUNTIES...

At 357 AM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 3 inches of rain have 
fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Davenport, Moline, Rock Island, Bettendorf, East Moline, Silvis, 
  Eldridge, Colona, Milan, Le Claire, Hampton, Port Byron, Rapids 
  City, Princeton, Long Grove, Cordova, Riverdale, Cleveland, Osborn 
  and Carbon Cliff.

This includes the following highways...
	Interstate 74 in Iowa between mile markers 1 and 5.
	Interstate 280 between mile markers 9 and 11...and
	between mile markers 14 and 17.
	Interstate 80 in Iowa between mile markers 291 and 306.
	Interstate 80 in Illinois between mile markers 1 and 7.
	Interstate 74 in Illinois between mile markers 1 and 4.
	Interstate 88 between mile markers 1 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

&&

LAT...LON 4153 9066 4162 9066 4169 9064 4170 9042
      4169 9023 4168 9023 4166 9019 4165 9017
      4164 9017 4159 9017 4159 9019 4158 9017
      4151 9024 4148 9035 4147 9046 4144 9057
      4148 9064

FLASH FLOOD...RADAR INDICATED

$$

Gibbs
093 
WGUS73 KDVN 081012
FFSDVN

Flash Flood Statement
National Weather Service Quad Cities IA IL
512 AM CDT Mon May 8 2023

IAC163-ILC073-161-081022-
/O.CAN.KDVN.FF.W.0003.000000T0000Z-230508T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Scott IA-Henry IL IL-Rock Island IL-
512 AM CDT Mon May 8 2023

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN SCOTT, 
NORTHWESTERN HENRY IL AND EAST CENTRAL ROCK ISLAND COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4153 9066 4162 9066 4169 9064 4170 9042
      4169 9023 4168 9023 4166 9019 4165 9017
      4164 9017 4159 9017 4159 9019 4158 9017
      4151 9024 4148 9035 4147 9046 4144 9057
      4148 9064

$$

Gibbs

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 8, 12:39 AM CDT, 1 hour 28 minutes earlier.

Area forecast discussion, May 8, 12:39 AM CDT, 1 hour 28 minutes before
Area Forecast Discussion
National Weather Service Quad Cities IA IL
1239 AM CDT Mon May 8 2023

...AVIATION UPDATE...

.SYNOPSIS...
Issued at 225 PM CDT Sun May 7 2023

Stationary frontal boundary lies across se NE to se IA to ne IL.
Temps were in the 80s south of the front with dewpoints in the
60s. Moline has already broke the record for today (see climate
section below).

SPC mesoanalysis shows tremendous energy available with SBCAPES of
5000 J/kg across southern IA with the CAPE gradient along I-80.
Bulk shear was very strong at 55-60 kt across IA with SRH of 200
m2/s2. Giant hail parameters were also in place, so this is a
volatile atmosphere to say the least!

&&

.SHORT TERM...(This evening through Monday)
Issued at 225 PM CDT Sun May 7 2023

Enhanced risk (level 3 of 5) for severe storms this evening and
overnight. Main risks are damaging winds greater than 75 mph,
giant hail (hen egg size or larger) and tornadoes. Heavy rain and
possible flash flooding are also a threat. CAM's develops
scattered supercells this evening then followed by a classic
severe bow echo sweeping across much of the cwa overnight. If this
pans out then 80+ mph winds are possible after midnight. With
numerous thunderstorms forming in this juicy airmass (PWAT's 1.50
inches) heavy rainfall and possible flash flooding are also on
the table. This is one of those times be on alert even during the
wee hours of the morning!

Monday: A cold front arrives pushing the thunderstorm threat
eventually east and southward and the severe threat has been
pushed south of the dvn cwa. It will be cooler with highs in the
upper 60s north to upper 70s south.

.LONG TERM...(Monday night through Sunday)
Issued at 225 PM CDT Sun May 7 2023

1) Warm week ahead with thunderstorm chances returning again late
   in the week into next weekend.

Tuesday through Sunday: Persistent deep trough in the Rockies
with a zonal to southwest flow aloft will keep our area in a warm
regime with daily highs in the 70s to lower 80s. Thunderstorm
chances return late in the week into next weekend.

&&

.AVIATION...(For the 06Z TAFS through 06Z Monday night)
Issued at 1232 AM CDT Mon May 8 2023

Showers and thunderstorms have developed across the area and are
currently impacting KDBQ, KCID, and KMLI. Periods of MVFR to IFR
visibilities are possible in the strongest storms. These storms
will slowly spread over the remainder of the area tonight with
storms exiting the area by 12 UTC> Ceilings will remain near 8
kft to start but will slowly lower to MVFR this morning. Ceilings
will remain MVFR until a cold front moves across the area by
Monday afternoon then ceilings will improve to VFR. Winds behind
the front will switch to the north and become gusty.

&&

.CLIMATE...
Issued at 106 PM CDT Sun May 7 2023

Record High Temperatures for Sunday May 7, 2023

Burlington   88 1934
Cedar Rapids 98 1896
Dubuque      91 1896+
Moline       88 1965+

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...NONE.
IL...NONE.
MO...NONE.
&&

SYNOPSIS...Haase
SHORT TERM...Haase
LONG TERM...Haase
AVIATION...Cousins
CLIMATE...Haase
Hazardous weather outlook, May 7, 11:48 AM CDT, 14 hours 19 minutes before
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
1148 AM CDT Sun May 7 2023

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-081700-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
1148 AM CDT Sun May 7 2023

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...THIS AFTERNOON AND TONIGHT

The Storm Prediction Center has an Enhanced risk, or level 3 out
of 5, for severe thunderstorms this evening and overnight across
much of the outlook area. The main threats are tornadoes, damaging
winds in excess of 75 MPH and golf ball size hail or larger.
There is an additional threat for heavy rainfall and the potential
for flash flooding with a slight or level 2 risk of excessive rainfall.

The Mississippi River continues to experience flooding. Please
see the latest Flood Statements and Flood Warnings for details.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

There is a chance for thunderstorms on Monday and again late next
week. However, the risk for severe storms is low.

The Mississippi River will continue to experience flooding during
the upcoming week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed this evening and overnight.

Haase

In the hours before

Local storm report, May 8, 12:23 AM CDT, 1 hour 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1223 AM CDT MON MAY 8 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1155 PM     HAIL             DAVENPORT AIRPORT       41.61N 90.58W
05/07/2023  M0.50 INCH       SCOTT              IA   OFFICIAL NWS OBS

&&
Local storm report, May 8, 12:37 AM CDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1237 AM CDT MON MAY 8 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1155 PM     HAIL             DAVENPORT AIRPORT       41.61N 90.58W
05/07/2023  M0.50 INCH       SCOTT              IA   OFFICIAL NWS OBS

1058 PM     HAIL             3 SSW CENTER JUNCTION   42.08N 91.11W
05/07/2023  E0.70 INCH       JONES              IA   TRAINED SPOTTER

            PEA TO DIME HAIL FOR 3 MINUTES.

1058 PM     HAIL             3 SSW CENTER JUNCTION   42.08N 91.11W
05/07/2023  E0.70 INCH       JONES              IA   TRAINED SPOTTER

            PEA TO DIME HAIL FOR 3 MINUTES.

0950 PM     HAIL             LITTLETON               42.54N 92.02W
05/07/2023  E1.25 INCH       BUCHANAN           IA   CO-OP OBSERVER

0823 PM     HAIL             1 SE KEOKUK             40.40N 91.39W
05/07/2023  E0.70 INCH       LEE                IA   TRAINED SPOTTER

0820 PM     TSTM WND DMG     1 SSE MACOMB            40.46N 90.67W
05/07/2023                   MCDONOUGH          IL   TRAINED SPOTTER

            SEVERAL LARGE TREE LIMBS DOWN. SHED THROWN
            ABOUT 30 FEET. WINDS WITH GUST FRONT. TIME
            ESTIMATED.

0815 PM     TSTM WND DMG     2 SSE MACOMB            40.44N 90.67W
05/07/2023                   MCDONOUGH          IL   TRAINED SPOTTER

            TWO LARGE TREE BRANCHES DOWN. TIME
            ESTIMATED.

0815 PM     TSTM WND GST     MACOMB MUNICIPAL ARPT   40.52N 90.65W
05/07/2023  M63 MPH          MCDONOUGH          IL   ASOS

0812 PM     TSTM WND GST     4 W TENNESSEE           40.41N 90.91W
05/07/2023  E60 MPH          HANCOCK            IL   TRAINED SPOTTER

0810 PM     HIGH SUST WINDS  1 SSE MACOMB            40.46N 90.67W
05/07/2023  E60 MPH          MCDONOUGH          IL   TRAINED SPOTTER

            QUICK MOVING SYSTEM TURNED DARK VERY QUICK
            AND WINDS PICKED UP FROM MILD TO 60 MPH
            QUICKLY.

0802 PM     TSTM WND DMG     1 S SCIOTA              40.55N 90.75W
05/07/2023                   MCDONOUGH          IL   BROADCAST MEDIA

            REPORT OF POWERLINES DOWN ON A CAR WITH THE
            DRIVER TRAPPED NEAR THE WEST PRAIRIE HIGH
            SCHOOL. TIME ESTIMATED BY RADAR.

0759 PM     TSTM WND DMG     2 WSW FLORID            41.22N 89.32W
05/07/2023                   PUTNAM             IL   PUBLIC

            ESTIMATED 65 MPH WIND GUST WITH TREES DOWN
            ACROSS THE COUNTY.

0756 PM     TSTM WND DMG     DALLAS CITY             40.63N 91.16W
05/07/2023                   HANCOCK            IL   AMATEUR RADIO

            REPORT OF TREE DOWN IN DALLAS CITY. TIME
            ESTIMATED BY RADAR.

0748 PM     HIGH SUST WINDS  1 SSW MOOAR             40.44N 91.45W
05/07/2023  E60 MPH          LEE                IA   TRAINED SPOTTER

0742 PM     HAIL             2 SW MOUNT PLEASANT     40.95N 91.57W
05/07/2023  E2.00 INCH       HENRY              IA   PUBLIC

0734 PM     HAIL             1 SE WEST BURLINGTON    40.81N 91.16W
05/07/2023  E1.00 INCH       DES MOINES         IA   TRAINED SPOTTER

0731 PM     TSTM WND GST     1 S BURLINGTON REGIONAL 40.77N 91.13W
05/07/2023  M60 MPH          DES MOINES         IA   ASOS

            ASOS STATION KBRL BURLINGTON ARPT.

0730 PM     TSTM WND DMG     1 NNE MOUNT PLEASANT    40.97N 91.54W
05/07/2023                   HENRY              IA   TRAINED SPOTTER

            PARKING SIGNS BENT OVER. TIME ESTIMATED.

0730 PM     HAIL             1 SSE BEAVERDALE        40.83N 91.21W
05/07/2023  E1.00 INCH       DES MOINES         IA   PUBLIC

            60-65 MPH GUST AND SHEET RAIN.

0723 PM     HAIL             1 NW MOUNT PLEASANT     40.97N 91.56W
05/07/2023  E0.25 INCH       HENRY              IA   TRAINED SPOTTER

            MILD WINDS, MODERATE RAIN, LOTS OF HAIL
            AROUND PEA SIZED.

0721 PM     HAIL             MEDIAPOLIS              41.01N 91.17W
05/07/2023  E1.00 INCH       DES MOINES         IA   TRAINED SPOTTER

            NICKLE TO QUARTER WITH HEAVY RAIN.

0720 PM     TSTM WND DMG     1 N SHALE CITY          41.23N 90.64W
05/07/2023                   MERCER             IL   911 CALL CENTER

            REPORTS OF TREES AND POWERLINES DOWN ALL
            ACROSS THE COUNTY.

0719 PM     FUNNEL CLOUD     1 W BURLINGTON          40.81N 91.13W
05/07/2023                   DES MOINES         IA   PUBLIC

            FUNNEL CLOUDS DIPPING UP AND DOWN NOT
            TOUCHING THE GROUND.

0714 PM     HEAVY RAIN       MEDIAPOLIS              41.01N 91.17W
05/07/2023  U1.00 INCH       DES MOINES         IA   TRAINED SPOTTER

            HIGH WIND GUSTS AND HEAVY RAIN.

0705 PM     HAIL             MACOMB                  40.47N 90.68W
05/07/2023  M1.00 INCH       MCDONOUGH          IL   BROADCAST MEDIA

            ALSO SOME MPING REPORTS OF QUARTER SIZED
            HAIL IN MACOMB.

0704 PM     HAIL             1 NW MACOMB             40.48N 90.69W
05/07/2023  E1.00 INCH       MCDONOUGH          IL   TRAINED SPOTTER

0701 PM     HAIL             MACOMB                  40.47N 90.68W
05/07/2023  E1.00 INCH       MCDONOUGH          IL   PUBLIC

            REPORT FROM MPING: QUARTER (1.00 IN.).

0700 PM     HAIL             MACOMB                  40.47N 90.69W
05/07/2023  E0.75 INCH       MCDONOUGH          IL   PUBLIC

            REPORT FROM MPING: DIME (0.75 IN.).

0658 PM     HEAVY RAIN       PARNELL                 41.59N 92.01W
05/07/2023  M1.30 INCH       IOWA               IA   PUBLIC

0658 PM     HAIL             1 SSE MACOMB            40.46N 90.67W
05/07/2023  E1.00 INCH       MCDONOUGH          IL   PUBLIC

            REPORT FROM MPING: QUARTER (1.00 IN.).

0655 PM     HAIL             1 W MACOMB              40.47N 90.70W
05/07/2023  E1.00 INCH       MCDONOUGH          IL   TRAINED SPOTTER

0649 PM     HAIL             3 SW PRAIRIE CITY       40.60N 90.50W
05/07/2023  E1.75 INCH       MCDONOUGH          IL   TRAINED SPOTTER

0645 PM     HAIL             1 SW PERLEE             41.08N 91.91W
05/07/2023  E0.88 INCH       JEFFERSON          IA   TRAINED SPOTTER

0645 PM     HAIL             3 ESE OSBORN            41.50N 90.22W
05/07/2023  E0.70 INCH       HENRY              IL   TRAINED SPOTTER

0643 PM     HAIL             1 NE COLUMBUS CITY      41.26N 91.36W
05/07/2023  E0.88 INCH       LOUISA             IA   TRAINED SPOTTER

0640 PM     TSTM WND DMG     1 SW BUFFALO PRAIRIE    41.33N 90.86W
05/07/2023                   MERCER             IL   911 CALL CENTER

            POWERLINES DOWNED BY THUNDERSTORM WINDS.
            TIME BASED ON RADAR AND POWER OUTAGE MAPS.

0640 PM     TORNADO          3 E YORKTOWN            41.57N 89.80W
05/07/2023                   BUREAU             IL   BROADCAST MEDIA

            EFU LANDSPOUT TORNADO REPORTED BY MEDIA.

0640 PM     HAIL             2 E COLCHESTER          40.42N 90.76W
05/07/2023  E0.88 INCH       MCDONOUGH          IL   TRAINED SPOTTER

            PEA TO NICKEL HAIL COVERED GROUND.

0638 PM     TSTM WND DMG     2 SW MOUNT PLEASANT     40.95N 91.57W
05/07/2023                   HENRY              IA   PUBLIC

            ROOF TORN OFF A MANUFACTURED HOME DUE TO THE
            STRAIGHT LINE WINDS.

0635 PM     TSTM WND DMG     4 WSW MOUNT UNION       41.03N 91.45W
05/07/2023                   HENRY              IA   TRAINED SPOTTER

            WIND FROM THE NORTH ESTIMATED TO BE 80 MPH.
            DESCRIBED AS LIKE A HURRICANE. THE STRONG
            WINDS LASTED FOR ABOUT 20 MINUTES. POWER OUT
            ABOUT 630 PM BEFORE WIND. A 6 INCH DIAMETER
            TREE LIMB BLOWN DOWN AND SMALLER BRANCHES.
            ALSO SOME SCAFFOLDING WAS BLOWN INTO AT
            TREE. TIME ESTIMATED.

0635 PM     TSTM WND DMG     2 S MOUNT JOY           41.58N 90.54W
05/07/2023                   SCOTT              IA   TRAINED SPOTTER

            3 INCH TREE SNAPPED AT BASE.

0635 PM     HAIL             3 NNE FAIRFIELD MUNICIP 41.09N 91.97W
05/07/2023  E1.75 INCH       JEFFERSON          IA   PUBLIC

            TIME ESTIMATED.

0634 PM     HAIL             3 S SWAN CREEK          40.62N 90.65W
05/07/2023  U2.50 INCH       MCDONOUGH          IL   PUBLIC

            REPORT FROM MPING: TENNIS BALL (2.50 IN.).

0632 PM     TSTM WND GST     2 NE DAVENPORT          41.57N 90.57W
05/07/2023  E70 MPH          SCOTT              IA   NWS EMPLOYEE

            OFF DUTY NWS EMPLOYEE ESTIMATED WINDS OF 70
            MPH. HE ALSO REPORTED NICKEL SIZE HAIL AND
            LARGE TREE BRANCHES DOWN NEAR 53RD STREET
            AND US 61 IN DAVENPORT.

0632 PM     TSTM WND GST     DAVENPORT MUNICIPALITY  41.62N 90.58W
05/07/2023  M67 MPH          SCOTT              IA   ASOS

            ASOS STATION KDVN DAVENPORT ARPT.

0631 PM     HAIL             FRUITLAND               41.35N 91.13W
05/07/2023  U1.00 INCH       MUSCATINE          IA   PUBLIC

            REPORT FROM MPING: QUARTER (1.00 IN.).

0631 PM     TSTM WND GST     1 SE CLINTON MUNICIPALI 41.82N 90.32W
05/07/2023  M66 MPH          CLINTON            IA   AWOS

            AWOS STATION KCWI CLINTON ARPT.

0631 PM     HAIL             1 SE GRANDVIEW          41.26N 91.17W
05/07/2023  M0.88 INCH       LOUISA             IA   TRAINED SPOTTER

0630 PM     HAIL             GOOD HOPE               40.56N 90.67W
05/07/2023  E2.00 INCH       MCDONOUGH          IL   PUBLIC

0628 PM     TSTM WND GST     DAVENPORT MUNICIPALITY  41.62N 90.58W
05/07/2023  M64 MPH          SCOTT              IA   ASOS

            ASOS STATION KDVN DAVENPORT ARPT.

0627 PM     HAIL             2 W BETTENDORF          41.57N 90.51W
05/07/2023  U0.50 INCH       SCOTT              IA   PUBLIC

            REPORT FROM MPING: HALF-INCH (0.50 IN.).

0626 PM     HAIL             1 SSW WASHINGTON        41.28N 91.70W
05/07/2023  E1.00 INCH       WASHINGTON         IA   TRAINED SPOTTER

0625 PM     HAIL             3 SE DAVENPORT          41.54N 90.56W
05/07/2023  U0.50 INCH       SCOTT              IA   PUBLIC

            REPORT FROM MPING: HALF-INCH (0.50 IN.).

0625 PM     HAIL             WASHINGTON              41.30N 91.69W
05/07/2023  E1.00 INCH       WASHINGTON         IA   TRAINED SPOTTER

0624 PM     HAIL             2 W BETTENDORF          41.56N 90.51W
05/07/2023  U0.50 INCH       SCOTT              IA   PUBLIC

            REPORT FROM MPING: HALF-INCH (0.50 IN.).

0623 PM     HAIL             WASHINGTON              41.30N 91.69W
05/07/2023  U1.00 INCH       WASHINGTON         IA   PUBLIC

            REPORT FROM MPING: QUARTER (1.00 IN.).

0621 PM     HAIL             FRUITLAND               41.35N 91.13W
05/07/2023  E1.75 INCH       MUSCATINE          IA   TRAINED SPOTTER

0617 PM     HAIL             OLLIE                   41.20N 92.10W
05/07/2023  M1.25 INCH       KEOKUK             IA   PUBLIC

            CORRECTS PREVIOUS HAIL REPORT FROM OLLIE.

0617 PM     HAIL             1 W SWAN CREEK          40.67N 90.67W
05/07/2023  M0.25 INCH       WARREN             IL   TRAINED SPOTTER

0615 PM     TSTM WND GST     DEWITT                  41.82N 90.55W
05/07/2023  E60 MPH          CLINTON            IA   NWS EMPLOYEE

0612 PM     HAIL             1 NNE BETTENDORF        41.58N 90.47W
05/07/2023  M0.88 INCH       SCOTT              IA   TRAINED SPOTTER

            DIME TO NICKEL HAIL.

0612 PM     HAIL             2 NNE BARSTOW           41.54N 90.34W
05/07/2023  E0.70 INCH       ROCK ISLAND        IL   TRAINED SPOTTER

0611 PM     TSTM WND DMG     BRIGHTON                41.17N 91.82W
05/07/2023                   WASHINGTON         IA   TRAINED SPOTTER

            12 INCH DIAMETER TREE BLOWN DOWN. TIME
            ESTIMATED.

0611 PM     HAIL             2 NE BARSTOW            41.54N 90.32W
05/07/2023  E1.00 INCH       ROCK ISLAND        IL   TRAINED SPOTTER

0607 PM     HAIL             LE CLAIRE               41.60N 90.36W
05/07/2023  E0.50 INCH       SCOTT              IA   PUBLIC

0603 PM     TSTM WND GST     NICHOLS                 41.48N 91.31W
05/07/2023  E60 MPH          MUSCATINE          IA   TRAINED SPOTTER

            WIND GUST ESTIMATED 50-60 MPH.

0602 PM     HAIL             2 SSE HILLS             41.55N 91.53W
05/07/2023  E1.00 INCH       JOHNSON            IA   TRAINED SPOTTER

0600 PM     HAIL             ATALISSA                41.57N 91.16W
05/07/2023  M1.00 INCH       MUSCATINE          IA   PUBLIC

0559 PM     TSTM WND DMG     3 SSW HOMESTEAD         41.73N 91.89W
05/07/2023                   IOWA               IA   TRAINED SPOTTER

            15-18 DIAMETER LIMBS DOWN. MINOR SIDING AND
            SHINGLE DAMAGE.

0559 PM     TSTM WND DMG     TIPTON                  41.77N 91.12W
05/07/2023                   CEDAR              IA   EMERGENCY MNGR

            LARGE TREE FELL ON A SHED. TIME ESTIMATED
            FROM RADAR.

0558 PM     HAIL             1 W SIGOURNEY           41.34N 92.22W
05/07/2023  M1.25 INCH       KEOKUK             IA   TRAINED SPOTTER

            TIME ESTIMATED FROM RADAR.

0555 PM     HAIL             KEOTA                   41.36N 91.96W
05/07/2023  M0.88 INCH       KEOKUK             IA   TRAINED SPOTTER

0555 PM     HAIL             WEST LIBERTY            41.57N 91.27W
05/07/2023  E1.75 INCH       MUSCATINE          IA   PUBLIC

            REPORT FROM MPING: GOLF BALL (1.75 IN.).

0552 PM     HAIL             1 S ELWOOD              41.99N 90.73W
05/07/2023  M1.25 INCH       CLINTON            IA   PUBLIC

0550 PM     HAIL             KALONA                  41.48N 91.70W
05/07/2023  E1.00 INCH       WASHINGTON         IA   TRAINED SPOTTER

0545 PM     HAIL             WEST LIBERTY            41.57N 91.27W
05/07/2023  U1.00 INCH       MUSCATINE          IA   PUBLIC

            REPORT FROM MPING: QUARTER (1.00 IN.).

0536 PM     HAIL             2 WSW DOWNEY            41.61N 91.39W
05/07/2023  E1.50 INCH       JOHNSON            IA   TRAINED SPOTTER

            TIME ESTIMATED FROM RADAR.

0535 PM     TSTM WND GST     WEST BRANCH             41.67N 91.35W
05/07/2023  M70 MPH          CEDAR              IA   EMERGENCY MNGR

0529 PM     TSTM WND GST     2 SE IOWA CITY          41.64N 91.51W
05/07/2023  M63 MPH          JOHNSON            IA   TRAINED SPOTTER

            55 KNOT WIND GUST.

0525 PM     HAIL             1 ESE NORTH LIBERTY     41.74N 91.60W
05/07/2023  E1.00 INCH       JOHNSON            IA   TRAINED SPOTTER

0524 PM     HAIL             1 ENE NORTH LIBERTY     41.75N 91.59W
05/07/2023  E1.00 INCH       JOHNSON            IA   TRAINED SPOTTER

0523 PM     HAIL             4 ENE IOWA CITY         41.67N 91.47W
05/07/2023  E1.00 INCH       JOHNSON            IA   TRAINED SPOTTER

0522 PM     HAIL             2 NNE NORTH LIBERTY     41.77N 91.59W
05/07/2023  U1.00 INCH       JOHNSON            IA   PUBLIC

            REPORT FROM MPING: QUARTER (1.00 IN.).

0520 PM     HAIL             2 NNE NORTH LIBERTY     41.77N 91.59W
05/07/2023  E1.00 INCH       JOHNSON            IA   PUBLIC

            CORRECTS PREVIOUS HAIL REPORT FROM 2 NNE
            NORTH LIBERTY. REPORT FROM MPING: QUARTER
            (1.00 IN.).

0519 PM     TSTM WND GST     IOWA CITY MUNICIPALITY  41.63N 91.55W
05/07/2023  M73 MPH          JOHNSON            IA   ASOS

            ASOS STATION KIOW IOWA CITY ARPT.

0519 PM     TSTM WND GST     2 NNW NORTH LIBERTY     41.76N 91.62W
05/07/2023  E60 MPH          JOHNSON            IA   TRAINED SPOTTER

0513 PM     HAIL             2 W CORALVILLE          41.69N 91.63W
05/07/2023  E1.00 INCH       JOHNSON            IA   TRAINED SPOTTER

0513 PM     TSTM WND DMG     MIDDLETOWN              40.84N 91.26W
05/07/2023                   DES MOINES         IA   TRAINED SPOTTER

            TREE DOWN.

0511 PM     TSTM WND DMG     1 NNE NORTH LIBERTY     41.76N 91.60W
05/07/2023                   JOHNSON            IA   TRAINED SPOTTER

            SEVERAL LARGE TREE BRANCHES DOWN IN TOWN,
            WITH MULTIPLE SMALLER LIMBS. TIME ESTIMATED
            FROM RADAR.

0510 PM     TSTM WND GST     TIFFIN                  41.71N 91.67W
05/07/2023  E75 MPH          JOHNSON            IA   TRAINED SPOTTER

            70 TO 80 MPH WIND GUSTS. DUST WITH REDUCED
            VISIBILITY. ALSO DIME TO NICKEL HAIL.

0510 PM     HAIL             WEVER                   40.72N 91.23W
05/07/2023  E1.75 INCH       LEE                IA   TRAINED SPOTTER

0510 PM     TSTM WND GST     1 ENE TIFFIN            41.71N 91.66W
05/07/2023  M70 MPH          JOHNSON            IA   TRAINED SPOTTER

0509 PM     HAIL             WEVER                   40.71N 91.23W
05/07/2023  M1.75 INCH       LEE                IA   PUBLIC

            TIME ESTIMATED FROM RADAR.

0509 PM     TSTM WND DMG     1 ENE TIFFIN            41.71N 91.66W
05/07/2023                   JOHNSON            IA   TRAINED SPOTTER

            SEVERAL SIGNIFICANT TREES DOWN OVER 1 FOOT
            AND A HALF IN DIAMETER.

0509 PM     HAIL             1 ENE TIFFIN            41.71N 91.66W
05/07/2023  E0.88 INCH       JOHNSON            IA   TRAINED SPOTTER

0509 PM     HAIL             2 WSW SPRING GROVE      40.73N 91.19W
05/07/2023  M0.25 INCH       DES MOINES         IA   TRAINED SPOTTER

0508 PM     TSTM WND GST     2 SW TIFFIN             41.69N 91.70W
05/07/2023  M74 MPH          JOHNSON            IA   TRAINED SPOTTER

            TIME ESTIMATED. ALSO DIME TO NICKEL HAIL.

0505 PM     TSTM WND DMG     3 WNW TIFFIN            41.72N 91.73W
05/07/2023                   JOHNSON            IA   TRAINED SPOTTER

            SEVERAL TREES DOWN AND TOPPED IN FW KENT
            PARK. TIME ESTIMATED.

0503 PM     HAIL             WEVER                   40.72N 91.23W
05/07/2023  E1.00 INCH       LEE                IA   TRAINED SPOTTER

0500 PM     TSTM WND GST     CEDAR RAPIDS MUNICIPALI 41.88N 91.72W
05/07/2023  M66 MPH          LINN               IA   ASOS

            ASOS STATION KCID CEDAR RAPIDS ARPT.

0500 PM     TSTM WND DMG     4 NW TIFFIN             41.75N 91.72W
05/07/2023                   JOHNSON            IA   EMERGENCY MNGR

            DAMAGE TO HANGAR AT GREENCASTLE AIRPORT,
            TIME ESTIMATED FROM RADAR.

0500 PM     TSTM WND DMG     1 ESE IOWA CITY         41.65N 91.52W
05/07/2023                   JOHNSON            IA   TRAINED SPOTTER

            SEVERAL MEDIUM SIZED TREE LIMBS DOWN.

0458 PM     TSTM WND DMG     3 SSE OXFORD            41.69N 91.77W
05/07/2023                   JOHNSON            IA   EMERGENCY MNGR

            SEMI BLOWN OVER CARRYING US MAIL ON
            INTERSTATE 80 NEAR MILE MARKER 232. TIME
            ESTIMATED FROM RADAR.

0457 PM     HAIL             AMANA                   41.80N 91.87W
05/07/2023  M1.00 INCH       IOWA               IA   TRAINED SPOTTER

0457 PM     TSTM WND DMG     AMANA                   41.80N 91.87W
05/07/2023                   IOWA               IA   TRAINED SPOTTER

            GUTTERS BLOWN OFF. 10 INCH DIAMETER BRANCH
            DOWN. DUMPSTER BLEW DOWN ALLEY.

0456 PM     HAIL             AMANA                   41.80N 91.90W
05/07/2023  E1.50 INCH       IOWA               IA   TRAINED SPOTTER

            TIME ESTIMATED FROM RADAR.

0456 PM     TSTM WND GST     AMANA                   41.80N 91.90W
05/07/2023  E65 MPH          IOWA               IA   PUBLIC

            TIME ESTIMATED FROM RADAR.

0455 PM     HAIL             HOMESTEAD               41.77N 91.87W
05/07/2023  E0.88 INCH       IOWA               IA   TRAINED SPOTTER

0447 PM     HAIL             1 W WEST POINT          40.72N 91.47W
05/07/2023  E1.75 INCH       LEE                IA   EMERGENCY MNGR

0447 PM     HAIL             1 S DENMARK             40.74N 91.34W
05/07/2023  E1.00 INCH       LEE                IA   EMERGENCY MNGR

0445 PM     TSTM WND DMG     HOMESTEAD               41.77N 91.87W
05/07/2023                   IOWA               IA   TRAINED SPOTTER

            10X10 SHED WAS BLOWN INTO A FENCE AND
            SEVERAL HOUSES NEARBY ON HWY 6 HAD LARGE
            TREES DOWN.

0444 PM     HAIL             1 SSE DENMARK           40.74N 91.33W
05/07/2023  M1.00 INCH       LEE                IA   EMERGENCY MNGR

0435 PM     TSTM WND GST     1 S MARENGO             41.78N 92.07W
05/07/2023  E60 MPH          IOWA               IA   PUBLIC

            ESTIMATED HIGHER THAN 60 MPH WIND GUSTS.

0435 PM     HAIL             1 S MARENGO             41.78N 92.07W
05/07/2023  M1.00 INCH       IOWA               IA   PUBLIC

            QUARTER SIZED HAIL.

0435 PM     HAIL             1 WSW MARENGO           41.79N 92.08W
05/07/2023  M1.00 INCH       IOWA               IA   TRAINED SPOTTER

            MOSTLY DIMES.

0433 PM     TSTM WND GST     1 WSW MARENGO           41.79N 92.08W
05/07/2023  E65 MPH          IOWA               IA   TRAINED SPOTTER

0432 PM     HAIL             4 N MARENGO             41.85N 92.07W
05/07/2023  M1.50 INCH       IOWA               IA   TRAINED SPOTTER

0432 PM     TSTM WND GST     2 SSE KOSZTA            41.81N 92.18W
05/07/2023  E70 MPH          IOWA               IA   PUBLIC

            ESTIMATED 70 MPH WINDS NEAR G AVENUE AND
            212.

0428 PM     HAIL             2 SE KOSZTA             41.81N 92.18W
05/07/2023  E2.75 INCH       IOWA               IA   PUBLIC

0423 PM     HAIL             5 E BELLE PLAINE        41.91N 92.18W
05/07/2023  M1.75 INCH       BENTON             IA   AMATEUR RADIO

            GOLF BALL HAIL. RELAYED BY EMERGENCY
            MANAGEMENT.

0420 PM     HAIL             1 S WEST POINT          40.70N 91.45W
05/07/2023  M0.75 INCH       LEE                IA   PUBLIC

            REPORT FROM MPING: DIME (0.75 IN.).

0419 PM     HAIL             5 E BELLE PLAINE        41.91N 92.18W
05/07/2023  M1.00 INCH       BENTON             IA   AMATEUR RADIO

            ONE INCH HAIL AND 54 MPH GUST.

0411 PM     HAIL             INDUSTRY                40.32N 90.61W
05/07/2023  M1.00 INCH       MCDONOUGH          IL   TRAINED SPOTTER

0408 PM     HAIL             BELLE PLAINE            41.90N 92.28W
05/07/2023  M1.50 INCH       BENTON             IA   TRAINED SPOTTER

0408 PM     HAIL             INDUSTRY                40.32N 90.61W
05/07/2023  M0.88 INCH       MCDONOUGH          IL   TRAINED SPOTTER

            NICKEL SIZED HAIL.

0405 PM     HAIL             BELLE PLAINE            41.90N 92.28W
05/07/2023  M1.00 INCH       BENTON             IA   FIRE DEPT/RESCUE

&&
Local storm report, May 8, 12:42 AM CDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1242 AM CDT MON MAY 8 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0628 PM     TSTM WND DMG     STANWOOD                41.89N 91.15W
05/07/2023                   CEDAR              IA   EMERGENCY MNGR

            TREE LIMBS DOWN ACROSS TOWN AND POWERLINES
            DOWN.

&&

ARG
Local storm report, May 8, 12:46 AM CDT, 1 hour 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1246 AM CDT MON MAY 8 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0628 PM     NON-TSTM WND DMG STANWOOD                41.89N 91.15W
05/07/2023                   CEDAR              IA   EMERGENCY MNGR

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM
            STANWOOD. TREE LIMBS DOWN ACROSS TOWN AND
            POWERLINES DOWN.

&&

ARG
Local storm report, May 8, 12:48 AM CDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1248 AM CDT MON MAY 8 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0504 PM     HAIL             1 SE DENMARK            40.74N 91.33W
05/07/2023  E1.25 INCH       LEE                IA   EMERGENCY MNGR

&&

ARG
Special weather statement, May 8, 1:01 AM CDT, 1 hour 6 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
101 AM CDT Mon May 8 2023

IAZ088-089-098-099-MOZ010-080645-
Henry IA-Des Moines IA-Van Buren IA-Lee IA-Clark MO-
101 AM CDT Mon May 8 2023

...A strong thunderstorm will impact portions of southern Henry, west
central Des Moines, southeastern Van Buren, northwestern Lee and
north central Clark Counties through 145 AM CDT...

At 100 AM CDT, Doppler radar was tracking a strong thunderstorm over
Croton, or 13 miles north of Kahoka, moving northeast at 30 mph.

HAZARD...Winds in excess of 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Donnellson around 110 AM CDT.
  Franklin around 115 AM CDT.
  West Point, St. Paul and Pilot Grove around 125 AM CDT.
  Salem around 135 AM CDT.
  Lowell around 140 AM CDT.
  Mount Pleasant and New London around 145 AM CDT.

Other locations impacted by this storm include Henry County
Fairgrounds, Charleston, Mt Hamill, Oakland Mills, Geode State Park,
Oakland Mills Park, Mount Pleasant Municipal Arpt, Lee County
Fairgrounds, Shimek State Forest and Battle of Athens Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
southeastern Iowa...and northeastern Missouri.

&&

LAT...LON 4050 9158 4058 9180 4100 9160 4088 9128
TIME...MOT...LOC 0600Z 205DEG 25KT 4061 9165

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

JTS

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 7, 7:06 PM CDTSevere Thunderstorm WarningDVNBureau, Henry, Putnam54 min
May 7, 7:09 PM CDTSevere Thunderstorm Warning Considerable damage threatDVNHenderson, Henry, Mercer, Rock Island, Warren51 min
May 7, 7:19 PM CDTSevere Thunderstorm Warning Considerable damage threatDVNHancock, Henderson, McDonough, Mercer, Warren41 min
May 7, 7:23 PM CDTSevere Thunderstorm WarningDVNBureau, Henry54 min
May 7, 7:49 PM CDTSevere Thunderstorm Warning Considerable damage threatDVNHancock, Henderson, McDonough, Warren56 min
May 7, 7:59 PM CDTSevere Thunderstorm WarningDVNBureau, Putnam18 min
May 7, 8:33 PM CDTFlash Flood WarningDVNBureau, Putnam110 min
May 7, 8:42 PM CDTSevere Thunderstorm WarningDVNHancock, McDonough33 min
May 8, 3:08 AM CDTSpecial Weather StatementDVNHenry37 min
May 8, 3:44 AM CDTSpecial Weather StatementDVNMcDonough31 min
May 7, 7:06 PM CDTSevere Thunderstorm Warning Considerable damage threatDVNHenry, Jefferson, Lee, Van Buren24 min
May 7, 7:27 PM CDTSevere Thunderstorm WarningDVNDes Moines, Henry33 min
May 7, 9:33 PM CDTSevere Thunderstorm WarningDVNBuchanan42 min
May 7, 10:39 PM CDTSpecial Weather StatementDVNClinton36 min
May 7, 10:42 PM CDTSpecial Weather StatementDVNBenton33 min
May 8, 1:01 AM CDTSpecial Weather StatementDVNLee44 min

Nearby

Flash Flood Warnings in Illinois, 2023Flash Flood Warnings in Iowa, 2023Every flash flood warning in 2023

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.