Alert archive / Missouri / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 118, NWS Quad Cities, IA

September 18, 2015Van Buren County, Iowa; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this severe thunderstorm warning at Sep 18, 2015, 12:51 AM CDT for Van Buren County, Iowa; Clark County, Scotland County, Missouri. It was in force for 24 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: Sep 18, 2015, 12:51 AM CDT (05:51 UTC)
Expired: Sep 18, 2015, 1:15 AM CDT
In force: 24 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Quad Cities radar (KDVN), 165 km from the middle of the area, began a volume at 05:54 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, 5.9 hours before the alert went out and 171 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: 1343 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1492 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 495 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 15.7

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 Sep 18, 12:09 AM CDT, 42 minutes earlier.

Area forecast discussion, Sep 18, 12:09 AM CDT, 42 minutes before

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Hazardous weather outlook, Sep 17, 5:00 AM CDT, 19 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
500 AM CDT THU SEP 17 2015

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-181000-
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-
500 AM CDT THU SEP 17 2015

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 STRONG AND POSSIBLY SEVERE STORMS ARE EXPECTED THIS
AFTERNOON AND EVENING ACROSS EASTERN IOWA INTO FAR NORTHWEST
ILLINOIS. THE STORM PREDICTION CENTER HAS PLACED A SLIGHT RISK OVER
THIS AREA. THE MAIN SEVERE WEATHER THREAT WILL BE LARGE HAIL AND
DAMAGING WIND.

WIDESPREAD THUNDERSTORMS ARE LIKELY OVERNIGHT ACROSS THE ENTIRE
OUTLOOK AREA AS A COLD FRONT MOVES THROUGH THE REGION. THE MAIN
STORM THREAT WILL BE LOCALLY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ANOTHER ROUND OF THUNDERSTORMS ARE EXPECTED TO SPREAD ACROSS MUCH
OF THE OUTLOOK AREA FROM THE SOUTHWEST FRIDAY AFTERNOON AND NIGHT.
A FEW OF THESE STORMS MAY BE SEVERE WITH DAMAGING WINDS AND LARGE
HAIL THE PRIMARY THREATS. LATEST INDICATIONS SUGGEST AREAS MORE
FAVORABLE FOR STRONG TO SEVERE STORMS WILL BE ACROSS EAST CENTRAL
AND SOUTHEASTERN IOWA...FAR NORTHEASTERN MISSOURI...AND INTO WEST
CENTRAL ILLINOIS FRIDAY EVENING. THE STORM PREDICTION CENTER HAS
PLACED A SLIGHT RISK FOR SEVERE WEATHER FOR FRIDAY GENERALLY
ALONG AN WEST OF A LINE FROM CEDAR RAPIDS IOWA...TO THE QUAD
CITIES...AND TO MACOMB IN WEST CENTRAL ILLINOIS.

HEAVY RAINFALL WILL BE MORE OF A WIDESPREAD THREAT BY FRIDAY
NIGHT...WITH 1 TO 2 INCHES OF ADDITIONAL RAINFALL POSSIBLE IN
AREAS THAT GET REPEATED THUNDERSTORMS. HIGH RAINFALL RATES MAY
PRODUCE PONDING OF WATER ON ROADS AND TEMPORARY URBAN FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

SHEETS/12

In the hours before

Special weather statement, Sep 17, 9:47 PM CDT, 3 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
947 PM CDT THU SEP 17 2015

IAC163-180315-
SCOTT-
947 PM CDT THU SEP 17 2015

...STRONG THUNDERSTORM WITH GUSTY WINDS...

AT 947 PM CDT...A STRONG THUNDERSTORM WAS NEAR WALCOTT...OR NEAR
DAVENPORT...MOVING NORTHEAST AT 45 MPH.

WINDS OF 40 TO 50 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
DAVENPORT...ELDRIDGE...WALCOTT...BLUE GRASS...LONG GROVE...DONAHUE...
MCCAUSLAND...MAYSVILLE...PARK VIEW...SCOTT COUNTY PARK...WEST LAKE
PARK...DAVENPORT MUNICIPAL AIRPORT AND PLAINVIEW.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 285 AND 297.
 INTERSTATE 280 BETWEEN MILE MARKERS 1 AND 5.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4146 9078 4168 9079 4177 9059 4176 9058
      4177 9054 4177 9051 4175 9043 4174 9043
      4174 9041 4173 9041 4174 9038 4174 9034
      4173 9032 4172 9032
TIME...MOT...LOC 0247Z 237DEG 38KT 4158 9071

05

Local storm report, Sep 17, 9:50 PM CDT, 3 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
950 PM CDT THU SEP 17 2015

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

0930 PM     HAIL             MUSCATINE               41.42N 91.07W
09/17/2015  E1.50 INCH       MUSCATINE          IA   BROADCAST MEDIA

            FROM SOCIAL MEDIA.

&&

HAASE

Local storm report, Sep 17, 10:19 PM CDT, 2 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1019 PM CDT THU SEP 17 2015

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

0511 PM     TSTM WND GST     PEARL CITY              42.27N 89.83W
09/17/2015  E60.00 MPH       STEPHENSON         IL   PUBLIC

            SMALL TREE BRANCHES DOWN IN TOWN WITH SIDEWAYS RAIN AT
            TIMES...REPORT SENT TO NWS FACEBOOK PAGE.

0532 PM     HEAVY RAIN       PEARL CITY              42.27N 89.83W
09/17/2015  M1.63 INCH       STEPHENSON         IL   BROADCAST MEDIA

            RAINFALL AMOUNT IN 1/2 HOUR ENDING AT 515 PM.

0535 PM     TSTM WND GST     GERMAN VALLEY           42.22N 89.48W
09/17/2015  E50.00 MPH       STEPHENSON         IL   EMERGENCY MNGR

            50 MPH WIND GUST ALONG WITH TORRENTIAL RAINFALL. CARS
            PULLING OFF THE ROAD.

0708 PM     HAIL             1 NW DUBUQUE            42.51N 90.70W
09/17/2015  M0.75 INCH       DUBUQUE            IA   TRAINED SPOTTER

            PEA TO PENNY SIZE HAIL ALONG WITH TORRENTIAL RAIN.

0749 PM     HAIL             DAVENPORT MUNICIPAL AIR 41.62N 90.58W
09/17/2015  M1.50 INCH       SCOTT              IA   NWS EMPLOYEE

0752 PM     HAIL             ELDRIDGE                41.64N 90.57W
09/17/2015  M1.50 INCH       SCOTT              IA   NWS EMPLOYEE

0753 PM     HAIL             ELDRIDGE                41.64N 90.57W
09/17/2015  M1.75 INCH       SCOTT              IA   NWS EMPLOYEE

0754 PM     HAIL             ELDRIDGE                41.64N 90.57W
09/17/2015  M1.25 INCH       SCOTT              IA   NWS EMPLOYEE

0756 PM     HAIL             PARK VIEW               41.69N 90.54W
09/17/2015  M1.50 INCH       SCOTT              IA   NWS EMPLOYEE

0810 PM     HAIL             ESE BATAVIA             40.99N 92.17W
09/17/2015  E1.00 INCH       JEFFERSON          IA   TRAINED SPOTTER

            MOSTLY NICKEL SIZE WITH A FEW QUARTER SIZE.

0900 PM     HAIL             COLUMBUS JUNCTION       41.28N 91.36W
09/17/2015  M1.00 INCH       LOUISA             IA   BROADCAST MEDIA

0925 PM     HAIL             3 NE MUSCATINE          41.44N 91.02W
09/17/2015  M0.88 INCH       MUSCATINE          IA   TRAINED SPOTTER

0930 PM     HAIL             MUSCATINE               41.42N 91.07W
09/17/2015  E1.50 INCH       MUSCATINE          IA   BROADCAST MEDIA

            FROM SOCIAL MEDIA.

&&

GROSS

Special weather statement, Sep 17, 10:57 PM CDT, 1 hour 54 minutes before

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Special weather statement, Sep 18, 12:25 AM CDT, 26 minutes before

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Special weather statement, Sep 18, 12:29 AM CDT, 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 7:50 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	25 min
Sep 17, 8:06 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	24 min
Sep 17, 8:50 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine, Washington	25 min
Sep 17, 9:14 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine	31 min
Sep 17, 9:47 PM CDT	Special Weather Statement	DVN	Scott	28 min
Sep 17, 11:55 PM CDT	Flash Flood Warning	DVN	Clinton, Jackson	6 hr
Sep 18, 12:25 AM CDT	Special Weather Statement	DVN	Jackson	65 min
Sep 18, 12:29 AM CDT	Special Weather Statement	DVN	Van Buren	61 min
Sep 18, 1:18 AM CDT	Special Weather Statement	DVN	Lee	57 min
Sep 18, 1:25 AM CDT	Special Weather Statement	DVN	Scott	65 min
Sep 18, 3:51 AM CDT	Flash Flood Watch	DVN	Cedar, Clinton, Jackson, Muscatine, Scott	20 hr
Sep 18, 3:39 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Keokuk, Washington	41 min
Sep 18, 2:03 PM CDT	Special Weather Statement	DVN	Hancock, McDonough	42 min
Sep 18, 2:42 PM CDT	Special Weather Statement	DVN	McDonough	33 min
Sep 18, 2:59 PM CDT	Flash Flood Warning	DVN	Hancock, Henderson, McDonough, Warren	8 hr
Sep 18, 3:22 PM CDT	Special Weather Statement	DVN	Bureau, Putnam	53 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2015 Severe Thunderstorm Warnings in Iowa, 2015 Every severe thunderstorm warning in 2015

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.