Alert archive / Iowa / Special Weather Statements in 2014

Special Weather Statement, NWS Quad Cities, IA

May 12, 2014Jefferson County, Van Buren County, Iowa; Scotland County, Missouri

NWS Quad Cities, IA issued this special weather statement at May 12, 2014, 2:20 PM CDT for Jefferson County, Van Buren County, Iowa; Scotland County, Missouri. It was in force for 70 min. 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 12, 2014, 2:20 PM CDT (19:20 UTC)
Expired: May 12, 2014, 3:30 PM CDT
In force: 70 min
Issued by: NWS Quad Cities, IA

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

The radar

The Quad Cities radar (KDVN), 162 km from the middle of the area, began a volume at 19:22 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 12:00Z, 7.3 hours before the alert went out and 168 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: 850 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 666 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 216 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 12, 12:41 PM CDT, 1 hour 39 minutes earlier.

Area forecast discussion, May 12, 12:41 PM CDT, 1 hour 39 minutes before

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Hazardous weather outlook, May 12, 3:38 AM CDT, 10 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
338 AM CDT MON MAY 12 2014

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-130845-
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-
338 AM CDT MON MAY 12 2014

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

SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE MAINLY DURING THE
AFTERNOON AND EVENING HOURS AS A COLD FRONT PUSHES EAST ACROSS
IOWA. SOME OF THESE STORMS MAY BECOME SEVERE WITH LARGE HAIL AND
DAMAGING WINDS THE MAIN THREATS. AN ISOLATED TORNADO IS ALSO
POSSIBLE WITH ANY DISCRETE SUPERCELLS THAT FORM AHEAD OF THE
FRONT.

THE MISSISSIPPI RIVER IS EXPERIENCING FLOODING. PLEASE SEE THE
LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

GROSS/DLF

In the hours before

Special weather statement, May 12, 9:08 AM CDT, 5 hours 12 minutes before

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Special weather statement, May 12, 10:27 AM CDT, 3 hours 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1027 AM CDT MON MAY 12 2014

IAZ053-054-064>068-ILZ015-121615-
CEDAR-CLINTON-JACKSON-JOHNSON-JONES-MUSCATINE-ROCK ISLAND-SCOTT-
1027 AM CDT MON MAY 12 2014

...STRONG THUNDERSTORM MOVING THROUGH EAST CENTRAL IOWA...

AT 1021 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR NICHOLS...OR 13 MILES SOUTH OF WEST
BRANCH...MOVING NORTHEAST AT 45 MPH.

* THE THUNDERSTORM WILL BE NEAR...
  ATALISSA AROUND 1035 AM CDT...
  ROCHESTER AND WILTON AROUND 1040 AM CDT...
  BENNETT AROUND 1050 AM CDT...
  WHEATLAND AROUND 1100 AM CDT...
  CALAMUS AROUND 1105 AM CDT...
  WELTON AND GRAND MOUND AROUND 1110 AM CDT...

PENNY SIZE HAIL...WINDS UP TO 50 MPH...AND HEAVY RAIN...CAN BE
EXPECTED WITH THIS STORM.

LAT...LON 4214 9086 4192 9042 4152 9051 4140 9135
      4165 9138
TIME...MOT...LOC 1526Z 232DEG 48KT 4153 9130

SHEETS

Special weather statement, May 12, 2:20 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
220 PM CDT MON MAY 12 2014

IAZ076-077-087-098-MOZ009-010-122030-
WASHINGTON IA-VAN BUREN IA-KEOKUK IA-JEFFERSON IA-CLARK MO-
SCOTLAND MO-
220 PM CDT MON MAY 12 2014

...STRONG THUNDERSTORMS LIKELY BY MID AFTERNOON...

AT 210 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM IN NORTHERN MISSOURI...ABOUT 50 MILES SOUTHWEST
OF KEOSAUQUA...OR 35 MILES WEST OF MEMPHIS. THIS STORM WAS MOVING
NORTHEAST AROUND 30 MPH AND WAS CAPABLE OF PRODUCING PENNY SIZE
HAIL...TORRENTIAL RAINFALL...AND WIND GUSTS UP TO 45 MPH.

THIS STORM...ALONG WITH OTHER DEVELOPING THUNDERSTORMS WILL MOVE
INTO FAR NORTHEAST MISSOURI AND SOUTHEAST IOWA...MAINLY WEST OF A
LINE FROM WASHINGTON TO KAHOKA BETWEEN 3 AND 4 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT MONDAY
EVENING FOR EASTERN IOWA...NORTHWESTERN ILLINOIS AND NORTHEAST
MISSOURI. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA OUTLETS
FOR POSSIBLE WARNINGS.

&&

LAT...LON 4128 9240 4132 9175 4025 9175 4025 9195
      4029 9196 4030 9196 4030 9235 4060 9236
      4061 9219 4115 9219 4116 9241 4125 9242

SHEETS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 11:46 PM CDT	Special Weather Statement	DVN	Benton, Buchanan	59 min
May 12, 12:28 AM CDT	Special Weather Statement	DVN	Benton, Buchanan, Iowa, Linn	62 min
May 12, 9:08 AM CDT	Special Weather Statement	DVN	Henry, Iowa, Jefferson, Johnson, Keokuk, Van Buren and 1 more	67 min
May 12, 10:27 AM CDT	Special Weather Statement	DVN	Cedar, Clinton, Muscatine, Scott	48 min
May 12, 3:45 PM CDT	Severe Thunderstorm Warning	DVN	Van Buren	45 min
May 12, 4:19 PM CDT	Special Weather Statement	DVN	Iowa	26 min
May 12, 4:24 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	51 min
May 12, 4:35 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson	25 min
May 12, 4:48 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Washington	42 min
May 12, 5:11 PM CDT	Special Weather Statement	DVN	Cedar	34 min
May 12, 5:18 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Louisa, Muscatine, Washington	42 min
May 12, 6:39 PM CDT	Special Weather Statement	DVN	Clinton, Des Moines, Jackson, Scott	51 min

Nearby

Special Weather Statements in Iowa, 2014 Special Weather Statements in Missouri, 2014 Every special weather statement in 2014

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.