Alert archive / Iowa / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 148, NWS Quad Cities, IA

August 13, 2010Lee County, Van Buren County, Iowa; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 13, 2010, 9:03 PM CDT for Lee County, Van Buren County, Iowa; Clark County, Scotland County, Missouri. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 13, 2010, 9:03 PM CDT (02:03 UTC)
Expired: Aug 13, 2010, 10:00 PM CDT
In force: 57 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lee County, IA, Van Buren County, IA, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 156 km from the middle of the area, began a volume at 02:06 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, 2.1 hours before the alert went out and 162 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 52 J/kg
Mixed-layer CIN: -303 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 13, 12:54 PM CDT, 8 hours 9 minutes earlier.

Area forecast discussion, Aug 13, 12:54 PM CDT, 8 hours 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1254 PM CDT FRI AUG 13 2010

.SYNOPSIS...
LOW PRESSURE NEAR KFSD WITH WARM FRONT TO NORTHERN IL AND COLD
FRONT FROM THE LOW TO THE TX PANHANDLE. BAND OF WAA THUNDERSTORMS
THAT WERE OVER THE DVN CWA EARLIER HAVE PUSHED OFF TO THE EAST AND
NORTH. IN THE MEANTIME...LARGE AREA OF THUNDERSTORMS PUSHING INTO
THE DVN CWA AHEAD OF THE FRONT. REFRESHINGLY COOLER AND MUCH LESS
HUMID AIR BEHIND THE COLD FRONT IN THE DAKOTAS. ..HAASE..

&&

.SHORT TERM...TONIGHT AND SATURDAY...
LARGE THUNDERSTORM COMPLEX WILL IMPACT THE DVN CWA THE REMAINDER OF
THE AFTERNOON AND THIS EVENING. MAIN THREAT WILL BE DAMAGING WINDS
AS MID LEVEL WINDS STRENGTHEN TO 50 KNOTS. TORRENTIAL RAINS MAY ALSO
PRODUCE FLASH FLOODING. NAM/RAPID REFRESH SEEMS TO NAIL THE
SCENARIO PRETTY GOOD WITH THE THUNDERSTORMS EXITING THE CWA BEFORE
MIDNIGHT. MAY BE ABLE TO CANCEL THE FLASH FLOOD WATCH SOMETIME TONIGHT
DEPENDING ON EVENTUAL CONVECTIVE TRENDS. HEAT HEADLINES WILL ALSO BE
CANCELED.

SATURDAY...COLD FRONT STILL TO ARRIVE SO VERY WARM AND HUMID BUT MAY
BE NOT QUITE AS EXCESSIVE AS THE PAST SEVERAL DAYS. DEPENDING ON
LINGERING CLOUD COVER OR LACK OF WILL DICTATE IF WE APPROACH HEAT
ADVISORY CRITERIA OR NOT. WILL HAVE A CHANCE OF THUNDERSTORMS STILL
ON SATURDAY AHEAD OF THE FRONT. SPC HAS A SLIGHT RISK FOR SEVERE
EAST OF THE MS RIVER. WILL FORECAST NEAR 90 WITH DEW POINTS IN THE
MID 70S...BUT IF CLOUD COVER LINGERS THEN MAY NOT MAKE IT THAT WARM.

..HAASE..

.LONG TERM...
SATURDAY NIGHT THROUGH NEXT FRIDAY...
THE COLD ADVECTION ALOFT CERTAINLY GETS GOING CLOSER TO EARLY
SUNDAY...AS SATURDAY NIGHT CONTINUES TO NOW APPEAR MORE AFFECTED BY
A WAVE ROUNDING THE BASE OF THE UPPER TROF. THIS CONTINUES THE TREND
OF GETTING SOME SHOWER OR THUNDERSTORMS ACTIVITY GOING SATURDAY
NIGHT. SEVERAL MESOSCALE MODELS SHOW RATHER VIGOROUS STORMS IN A
MATURE TO DISSIPATING MODE ENTERING THE CWA AT THE BEGINNING OF THE
PERIOD.  HOWEVER...DESPITE THE LATER ARRIVAL...MODELS AND ANALYSIS
STILL SHOW A SEASONALLY STRONG HIGH PRESSURE RIDGE BRINGING COOLER
AND MUCH MORE REFRESHING AIR TO THE REGION THROUGH AT LEAST MID
WEEK. TEMPERATURES HAVE BEEN HELD CONSISTENT WITH PREVIOUS FORECASTS
AS ATTENTION IS FOCUSED ON THE SHORT TERM TODAY. WE STILL ARE
KEEPING A VERY LOW POP IN FOR TUESDAY AND TUESDAY NIGHT FOR A RE
ENFORCING SHOT OF COOLER AIR AND UPPER WAVE....HOWEVER THERE IS
LITTLE IF ANY CONFIDENCE IN ITS PLACEMENT.
..ERVIN..

&&

.AVIATION...
LARGE THUNDERSTORM COMPLEX THIS AFTERNOON AND EVENING TO MOVE ACROSS
THE TAF SITES. STRONG TO DAMAGING WINDS AND VERY HEAVY RAINFALL
EXPECTED IN THE STORMS. AFTER MIDNIGHT THE STORMS SHOULD BE MOVING
SOUTHEAST OF THE TAF SITES. ..HAASE..

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR BENTON-BUCHANAN-
     CEDAR-CLINTON-DELAWARE-DES MOINES-DUBUQUE-HENRY IA-IOWA-
     JACKSON-JEFFERSON-JOHNSON-JONES-KEOKUK-LEE-LINN-LOUISA-
     MUSCATINE-SCOTT-VAN BUREN-WASHINGTON.

     EXCESSIVE HEAT WARNING UNTIL 6 PM CDT THIS EVENING FOR CEDAR-DES
     MOINES-HENRY IA-JEFFERSON-JOHNSON-LEE-LOUISA-MUSCATINE-
     SCOTT-VAN BUREN-WASHINGTON.

IL...FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR BUREAU-CARROLL-
     HANCOCK-HENDERSON-HENRY IL-JO DAVIESS-MCDONOUGH-MERCER-
     PUTNAM-ROCK ISLAND-STEPHENSON-WARREN-WHITESIDE.

     EXCESSIVE HEAT WARNING UNTIL 6 PM CDT THIS EVENING FOR HANCOCK-
     HENDERSON-HENRY IL-MCDONOUGH-MERCER-ROCK ISLAND-WARREN.

MO...FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR CLARK-SCOTLAND.

     EXCESSIVE HEAT WARNING UNTIL 6 PM CDT THIS EVENING FOR CLARK-
     SCOTLAND.

&&

HAASE/ERVIN/HAASE

Hazardous weather outlook, Aug 13, 10:46 AM CDT, 10 hours 17 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1046 AM CDT FRI AUG 13 2010

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-141600-
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-
1046 AM CDT FRI AUG 13 2010

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...TODAY AND TONIGHT

A LARGE THUNDERSTORM COMPLEX WILL MOVE ACROSS THE OUTLOOK AREA
THIS AFTERNOON AND TONIGHT. WIDESPREAD RAINS OF 1 TO 3 INCHES IS
LIKELY WITH AT LEAST 3 TO 5 INCHES POSSIBLE WHERE TRAINING OF
STORMS OCCUR. THIS AMOUNT OF RAIN ON SATURATED GROUND MAY CAUSE
SERIOUS FLASH FLOODING. A FLASH FLOOD WATCH IS IN EFFECT FOR THE
ENTIRE AREA THIS AFTERNOON AND TONIGHT.

THE STORM PREDICTION CENTER ALSO HAS THE ENTIRE AREA IN A SLIGHT
RISK FOR SEVERE THUNDERSTORMS. THE MAIN THREAT WILL BE DAMAGING
WINDS GREATER THAN 60 MPH.

HOT AND HUMID CONDITIONS WILL PERSIST UNTIL THUNDERSTORMS ARRIVE.
AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL THIS EVENING FOR
LOCATIONS NEAR AND SOUTH OF HIGHWAY 30. A HEAT ADVISORY IS IN
EFFECT TO THE NORTH. ONCE THUNDERSTORMS ARRIVE THE HEAT THREAT
WILL END QUICKLY AND HEAT HEADLINES WILL BE CANCELED.

AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST
FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL BE A CHANCE OF THUNDERSTORMS ON SATURDAY. THE STORM
PREDICTION CENTER HAS A SLIGHT RISK OF SEVERE STORMS EAST OF THE
MISSISSIPPI RIVER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE REQUIRED THIS AFTERNOON AND TONIGHT.

HAASE

In the hours before

Local storm report, Aug 13, 5:49 PM CDT, 3 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
549 PM CDT FRI AUG 13 2010

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

0106 PM     TSTM WND DMG     2 NE KEYSTONE           42.02N 92.17W
08/13/2010                   BENTON             IA   EMERGENCY MNGR

            LARGE TREE BLOWN DOWN OVER THE ROAD. TIME ESTIMATED.

0125 PM     TSTM WND GST     5 SW VINTON             42.11N 92.10W
08/13/2010  E60.00 MPH       BENTON             IA   EMERGENCY MNGR

0145 PM     TSTM WND GST     2 N SHELLSBURG          42.12N 91.87W
08/13/2010  E60.00 MPH       BENTON             IA   TRAINED SPOTTER

0210 PM     FLASH FLOOD      WINTHROP                42.47N 91.73W
08/13/2010                   BUCHANAN           IA   EMERGENCY MNGR

            COUNTY ROAD W45 FROM WINTHROP TO MONTI ALONG BUFFALO
            CREEK WAS FLOODED AT SEVERAL LOCATIONS BETWEEN 210 AND
            445 PM. FLOODED INTERSECTIONS INCLUDED 230TH, 260TH, AND
            270TH STREETS...AMONG OTHERS.

0215 PM     TSTM WND DMG     5 SW MASONVILLE         42.43N 91.66W
08/13/2010                   BUCHANAN           IA   LAW ENFORCEMENT

            TREE BLOWN DOWN ON ROOF.

0228 PM     HEAVY RAIN       2 WNW CEDAR RAPIDS      41.98N 91.70W
08/13/2010  M1.00 INCH       LINN               IA   TRAINED SPOTTER

            RAINFALL TOTAL IN PAST 35 MINUTES.

0231 PM     HEAVY RAIN       5 NNE CEDAR RAPIDS      42.04N 91.65W
08/13/2010  M1.50 INCH       LINN               IA   TRAINED SPOTTER

0244 PM     HEAVY RAIN       1 SSE CEDAR RAPIDS      41.95N 91.66W
08/13/2010  M0.60 INCH       LINN               IA   TRAINED SPOTTER

            RAINFALL TOTAL IN ABOUT 30 MINUTES. RAINFALL HAS ENDED AT
            THIS TIME.

0250 PM     TSTM WND DMG     S CENTER JUNCTION       42.11N 91.09W
08/13/2010                   JONES              IA   EMERGENCY MNGR

            TIME IS ESTIMATED - LARGE TREE DOWN NEAR HIGHWAY 13 - 1/2
            MILE SOUTH OF E29

0310 PM     HAIL             N WASHINGTON            41.31N 91.69W
08/13/2010  M0.25 INCH       WASHINGTON         IA   TRAINED SPOTTER

            SPOTTER ALSO REPORTED VERY HAEVY RAIN AT THIS TIME.

0342 PM     HEAVY RAIN       4 WNW DUBUQUE           42.52N 90.76W
08/13/2010  M1.00 INCH       DUBUQUE            IA   TRAINED SPOTTER

            RAINFALL IN THE PAST HALF HOUR. HEAVY RAIN STILL FALLING.

0354 PM     TSTM WND GST     SW CHARLOTTE            41.96N 90.47W
08/13/2010  E50.00 MPH       CLINTON            IA   TRAINED SPOTTER

            SPOTTER ALSO REPORTS A SHELF CLOUD MOVING ACROSS
            CHARLOTTE AT THIS TIME.

0400 PM     TSTM WND DMG     WOODBINE                42.35N 90.15W
08/13/2010                   JO DAVIESS         IL   LAW ENFORCEMENT

            SEVERAL LARGE TREE BRANCHES DOWN. DELAYED REPORT.

0402 PM     HEAVY RAIN       5 NW CROTON             40.64N 91.74W
08/13/2010  M1.00 INCH       VAN BUREN          IA   TRAINED SPOTTER

            RAINFALL IN PAST 20 MINUTES. RAIN IS STILL FALLING.

0402 PM     HEAVY RAIN       SIGOURNEY               41.33N 92.21W
08/13/2010  M1.37 INCH       KEOKUK             IA   TRAINED SPOTTER

            RAINFALL SO FAR THIS AFTERNOON.

0423 PM     TSTM WND GST     4 E FORT MADISON        40.62N 91.28W
08/13/2010  E50.00 MPH       HANCOCK            IL   TRAINED SPOTTER

            SPOTTER ALSO REPORTED HEAVY RAIN AT THIS TIME.

0509 PM     FLASH FLOOD      KEOKUK                  40.41N 91.40W
08/13/2010                   LEE                IA   TRAINED SPOTTER

            SPOTTER RELAYED THAT 10TH AND MAIN STREET ARE FLOODED AND
            LAW ENFORCEMENT IS RE-ROUTING TRAFFIC AROUND THE AREA.

0536 PM     HEAVY RAIN       MANCHESTER              42.49N 91.46W
08/13/2010  M1.07 INCH       DELAWARE           IA   FIRE DEPT/RESCUE

            RAINFALL FROM EARLIER STORMS

0536 PM     FLASH FLOOD      MANCHESTER              42.49N 91.46W
08/13/2010                   DELAWARE           IA   LAW ENFORCEMENT

            DELAYED REPORT - WATER OVER GRAVEL ROAD NEAR MANCHESTER

0536 PM     HEAVY RAIN       MASONVILLE              42.48N 91.59W
08/13/2010  M3.00 INCH       DELAWARE           IA   FIRE DEPT/RESCUE

            MEASURED AMOUNTS - 2.50 TO 3.00 INCHES - FROM STORMS
            EARLIER THIS AFTERNOON.

0538 PM     HEAVY RAIN       WYOMING                 42.06N 91.00W
08/13/2010  E1.50 INCH       JONES              IA   TRAINED SPOTTER

            SPOTTER ALSO REPORTED THAT LITTLE BEAR CREEK IS STARTING
            TO COME OUT OF ITS BANKS.

&&

HAASE

Local storm report, Aug 13, 6:26 PM CDT, 2 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
626 PM CDT FRI AUG 13 2010

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

0623 PM     HEAVY RAIN       3 ESE KEOKUK            40.40N 91.34W
08/13/2010  M3.00 INCH       HANCOCK            IL   TRAINED SPOTTER

            SPOTTER ALSO REPORTED SOME MINOR FLOODING IN THE AREA.

&&

MIKEZ

Local storm report, Aug 13, 6:38 PM CDT, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
638 PM CDT FRI AUG 13 2010

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

0638 PM     HEAVY RAIN       1 E PRINCETON           41.67N 90.34W
08/13/2010  M1.60 INCH       SCOTT              IA   TRAINED SPOTTER

            AFTERNOON RAINFALL.

&&

MIKEZ

Local storm report, Aug 13, 7:29 PM CDT, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
729 PM CDT FRI AUG 13 2010

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

0728 PM     HEAVY RAIN       2 NE CALAMUS            41.84N 90.73W
08/13/2010  M2.31 INCH       CLINTON            IA   TRAINED SPOTTER

            TOTAL SINCE 7 AM.

&&

MIKEZ

Local storm report, Aug 13, 7:32 PM CDT, 1 hour 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
732 PM CDT FRI AUG 13 2010

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

0730 PM     HEAVY RAIN       ESE MONMOUTH            40.91N 90.63W
08/13/2010  M1.00 INCH       WARREN             IL   TRAINED SPOTTER

            TOTAL RAINFALL TODAY

0727 PM     HEAVY RAIN       2 NE COLUSA             40.59N 91.14W
08/13/2010  M1.46 INCH       HANCOCK            IL   TRAINED SPOTTER

            RAINFALL TOTAL SINCE 6 AM

&&

DMD

Local storm report, Aug 13, 8:15 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
815 PM CDT FRI AUG 13 2010

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

0814 PM     HEAVY RAIN       GALENA                  42.42N 90.43W
08/13/2010  M1.31 INCH       JO DAVIESS         IL   CO-OP OBSERVER

            DAYTIME TOTAL.

&&

MIKEZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 8:02 PM CDT	River Flood Warning	DVN	Louisa	3 days
Aug 13, 8:49 PM CDT	Flash Flood Warning	DVN	Des Moines, Henry, Jefferson, Keokuk, Lee, Van Buren and 1 more	6 hr
Aug 13, 9:43 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Louisa, Washington	22 min
Aug 13, 10:10 PM CDT	Severe Thunderstorm Warning	DVN	Lee	65 min
Aug 13, 11:04 PM CDT	Flash Flood Warning	DVN	Clinton, Dubuque, Jackson, Scott	6 hr
Aug 13, 11:15 PM CDT	Special Weather Statement	DVN	Des Moines	60 min
Aug 13, 11:44 PM CDT	River Flood Warning	DVN	Johnson, Washington	40 hr
Aug 14, 3:25 AM CDT	River Flood Warning	DVN	Clinton, Scott	3 days
Aug 14, 7:53 AM CDT	River Flood Warning	DVN	Cedar, Louisa, Muscatine	27 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2010 Severe Thunderstorm Warnings in Missouri, 2010 Every severe thunderstorm warning in 2010

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.