Alert archive / Iowa / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 56, NWS Quad Cities, IA

May 29, 2013Buchanan County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at May 29, 2013, 4:45 PM CDT for Buchanan County, Iowa. It was in force for 45 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
May 29, 2013, 4:45 PM CDT (21:45 UTC)
Expired
May 29, 2013, 5:30 PM CDT
In force
45 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Buchanan County, IA

The radar

The Quad Cities radar (KDVN), 141 km from the middle of the area, began a volume at 21:46 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 29, 2:56 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.8 hours before the alert went out and 145 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, Davenport, at 12:00Z on 2013-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, Davenport, at 12:00Z on 2013-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -64 square meters per square second.193958Sfc1 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
3 J/kg
Mixed-layer CIN
-179 J/kg
Mixed-layer LCL
1192 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-64 m²/s²
0-3 km storm-relative helicity
90 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 May 29, 3:43 PM CDT, 1 hour 2 minutes earlier.

Area forecast discussion, May 29, 3:43 PM CDT, 1 hour 2 minutes before
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Hazardous weather outlook, May 29, 4:36 AM CDT, 12 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
436 AM CDT WED MAY 29 2013

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-300945-
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-
436 AM CDT WED MAY 29 2013

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

SCATTERED THUNDERSTORMS WILL BE POSSIBLE TODAY AND TONIGHT. THERE
IS A SLIGHT RISK OF SEVERE STORMS ESPECIALLY FROM LATE THIS
AFTERNOON INTO THIS EVENING. THE PRIMARY SEVERE WEATHER RISKS WILL
BE DAMAGING WINDS AND LARGE HAIL.

CONDITIONS WILL REMAIN FAVORABLE FOR LOCALLY HEAVY RAINS WITH THE
STRONGER STORMS. HOWEVER...IT DOES NOT APPEAR THAT THERE WILL
ORGANIZED STRONG STORMS THAT WOULD POSE A THREAT OF WIDESPREAD
FLASH FLOODING.

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

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THURSDAY THROUGH FRIDAY...THERE IS A SLIGHT RISK FOR SEVERE
THUNDERSTORMS OVER MOST OF THE OUTLOOK AREA. SEVERAL ROUNDS OF
THUNDERSTORMS WILL BE POSSIBLE THROUGH THIS PERIOD. THE PRIMARY
THREAT WILL BE HEAVY RAINFALL...WHICH MAY LEAD TO SIGNIFICANT FLASH
FLOODING. THE MAIN SEVERE WEATHER THREAT WILL BE DAMAGING WINDS AND
LARGE HAIL...PRIMARILY WITH STORMS THAT OCCUR DURING THE LATE
AFTERNOON AND EVENING HOURS.

THUNDERSTORMS WILL BE POSSIBLE FRIDAY NIGHT THROUGH SATURDAY.
CONDITIONS DO NOT APPEAR FAVORABLE FOR SEVERE WEATHER AND HEAVY
RAINFALL IS NOT EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND THIS EVENING.

DLF/SHEETS

In the hours before

Local storm report, May 29, 11:12 AM CDT, 5 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1112 AM CDT WED MAY 29 2013

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

1100 AM     FLOOD            5 E CANTRIL             40.64N 91.98W
05/29/2013                   VAN BUREN          IA   TRAINED SPOTTER

            THE FOX RIVER IS FLOODING PORTIONS OF JERSEY AVE. AT THIS
            TIME. LOCATION IS ABOUT 1 MILE NORTH OF SPOTTERS
            RESIDENCE.

&&
Special weather statement, May 29, 11:28 AM CDT, 5 hours 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1128 AM CDT WED MAY 29 2013

IAZ089-ILZ025-026-292100-
DES MOINES-HENDERSON-WARREN-
INCLUDING THE CITIES OF...BURLINGTON...OQUAWKA...MONMOUTH
1128 AM CDT WED MAY 29 2013

...HIGH WATER STILL CAUSING PROBLEMS IN SOME AREAS...

HEAVY RAIN LAST NIGHT CAUSED FLASH FLOODING ACROSS HENDERSON AND
WARREN COUNTIES IN ILLINOIS...AND DES MOINES COUNTY IN IOWA.

CALLS TO COUNTY SHERIFF AND EMERGENCY MANAGERS INDICATE WATER IS
STILL COVERING SOME ROADS. THE FOLLOWING INFORMATION IS KNOWN.

WARREN COUNTY ILLINOIS...THE MAJOR HIGHWAYS ARE CLEAR OR ONLY HAVE
WATER ON ONE LANE IN SPOTS. SEVERAL SECONDARY GRAVEL ROADS THAT
CROSS CEDAR CREEK AND THE SOUTH BRANCH OF HENDERSON CREEK ARE
STILL CLOSED DUE TO HIGH WATER. SOME GRAVEL ROADS CROSSING SOUTH
HENDERSON CREEK...BIG NEGRO CREEK...AND NEGRO CREEK IN THE
SOUTHERN PART OF WARREN COUNTY ARE ALSO CLOSED.

HENDERSON COUNTY ILLINOIS...HIGHWAY 94 IS CLOSED AT BALD BLUFF.
HIGHWAY 34 IS CLOSED EAST OF BIGGSVILLE. SEVERAL SECONDARY GRAVEL
ROADS REMAIN CLOSED AS WELL.

DES MOINES COUNTY IOWA...SEVERAL ROADS ARE STILL FLOODED.

WATER LEVELS WILL CONTINUE TO SLOWLY DROP THROUGH THE
AFTERNOON. MOTORISTS TRAVELING IN THESE COUNTIES SHOULD FIND
ALTERNATE ROUTES IF A FLOODED ROAD IS ENCOUNTERED.

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 7:27 PM CDTSpecial Weather StatementDVNWashington63 min
May 28, 7:39 PM CDTSevere Thunderstorm WarningDVNDes Moines, Henry, Jefferson, Keokuk, Louisa, Washington66 min
May 28, 7:44 PM CDTFlash Flood WarningDVNLouisa9 hr
May 28, 8:34 PM CDTSevere Thunderstorm WarningDVNDes Moines, Louisa, Muscatine, Scott56 min
May 28, 8:50 PM CDTRiver Flood WarningDVNVan Buren4 days
May 28, 8:50 PM CDTRiver Flood WarningDVNLee5 days
May 28, 9:07 PM CDTSevere Thunderstorm WarningDVNLee, Van Buren23 min
May 28, 9:33 PM CDTSpecial Weather StatementDVNLee57 min
May 29, 4:50 AM CDTAreal Flood WarningDVNDes Moines6 hr
May 29, 3:18 PM CDTFlash Flood WatchDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more54 hr
May 29, 5:01 PM CDTSevere Thunderstorm WarningDVNBenton, Iowa, Linn44 min
May 29, 5:25 PM CDTSpecial Weather StatementDVNBenton, Buchanan50 min
May 29, 5:35 PM CDTSevere Thunderstorm WarningDVNDelaware40 min
May 29, 6:07 PM CDTFlash Flood WarningDVNBenton, Buchanan, Delaware, Iowa, Linn6 hr
May 29, 6:58 PM CDTSevere Thunderstorm WarningDVNBenton, Buchanan, Linn47 min
May 28, 7:29 PM CDTFlash Flood WarningDVNBureau, Henry, Putnam9 hr
May 28, 9:31 PM CDTSpecial Weather StatementDVNRock Island44 min
May 29, 1:07 AM CDTSpecial Weather StatementDVNClark, Scotland53 min
May 29, 4:00 AM CDTRiver Flood WarningDVNClark4 days
May 29, 7:50 AM CDTAreal Flood WarningDVNScotland12 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2013Every severe thunderstorm warning in 2013

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.