Alert archive / Iowa / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 17, NWS Quad Cities, IA

May 3, 20155 counties in Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at May 3, 2015, 10:25 PM CDT for 5 counties in Iowa. It was in force for 35 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 3, 2015, 10:25 PM CDT (03:25 UTC)
Expired: May 3, 2015, 11:00 PM CDT
In force: 35 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Buchanan County, IA, Delaware County, IA, Dubuque County, IA, Jones County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 102 km from the middle of the area, began a volume at 03:26 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, 3.4 hours before the alert went out and 106 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: 527 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 2064 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 128 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 3, 7:06 PM CDT, 3 hours 19 minutes earlier.

Area forecast discussion, May 3, 7:06 PM CDT, 3 hours 19 minutes before

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Hazardous weather outlook, May 3, 4:59 AM CDT, 17 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
459 AM CDT SUN MAY 3 2015

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-041000-
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-
459 AM CDT SUN MAY 3 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

THUNDERSTORMS WILL BE POSSIBLE THIS MORNING AND AGAIN TONIGHT
ACROSS THE AREA. NO SEVERE STORMS ARE EXPECTED BUT SOME OF THE
STRONGER STORMS TONIGHT MAY PRODUCE SMALL HAIL.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THERE IS A DAILY CHANCE OF THUNDERSTORMS THROUGH THE WEEK.
CURRENTLY THE MORE FAVORED TIME PERIODS FOR THUNDERSTORMS ARE
MONDAY INTO TUESDAY AND THURSDAY THROUGH SATURDAY.

ON MONDAY...THUNDERSTORMS MAY BE STRONG TO POSSIBLY SEVERE DURING
THE AFTERNOON AND EVENING HOURS. IF SEVERE STORMS DEVELOP...THE
PRIMARY THREAT WOULD BE HAIL AND HIGH WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

In the hours before

Local storm report, May 3, 8:27 PM CDT, 1 hour 58 minutes before

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Local storm report, May 3, 8:49 PM CDT, 1 hour 36 minutes before

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Special weather statement, May 3, 9:14 PM CDT, 1 hour 11 minutes before

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Special weather statement, May 3, 9:19 PM CDT, 1 hour 6 minutes before

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Local storm report, May 3, 10:04 PM CDT, 21 minutes before

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Special weather statement, May 3, 10:09 PM CDT, 16 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
May 4, 3:29 AM CDT	Special Weather Statement	DVN	Cedar, Jones, Linn	61 min
May 4, 3:40 PM CDT	Special Weather Statement	DVN	Hancock	50 min
May 4, 4:45 PM CDT	Special Weather Statement	DVN	McDonough	60 min
May 4, 5:05 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	25 min
May 4, 5:41 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough	34 min
May 4, 6:28 PM CDT	Special Weather Statement	DVN	McDonough	62 min

Nearby

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.