Alert archive / Iowa / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 113, NWS Sioux Falls, SD

May 19, 2004Clay County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 19, 2004, 4:30 PM CDT for Clay County, Iowa. It was in force for 30 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 19, 2004, 4:30 PM CDT (21:30 UTC)
Expired: May 19, 2004, 5:00 PM CDT
In force: 30 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Clay County, IA

The radar

The Sioux Falls radar (KFSD), 132 km from the middle of the area, began a volume at 21:31 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.

What was reported inside it

Time	Report	Where
May 19, 4:35 PM CDT	HAIL 1	2 S Spencer, IA
May 19, 4:35 PM CDT	HAIL 1	2 S Spencer, IA
May 19, 4:35 PM CDT	HAIL 1	2 S Spencer, IA
May 19, 4:53 PM CDT	HAIL 0.75	Fostoria, IA
May 19, 4:53 PM CDT	HAIL 0.75	Fostoria, IA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 226 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1572 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

504 
WUUS53 KFSD 192130
SVRFSD
IAC041-192200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
430 PM CDT WED MAY 19 2004

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN NORTHWEST IOWA

* UNTIL 500 PM CDT

* AT 426 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 8 MILES WEST OF EVERLY...OR ABOUT 17 MILES WEST
  OF SPENCER...MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MONETA...EVERLY...ROYAL AROUND 440 PM CDT
  FOSTORIA...SPENCER AROUND 455 PM CDT

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4325 9539 4304 9539 4308 9492 4324 9492

$$

08

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 2:45 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	45 min
May 19, 3:13 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	32 min
May 19, 3:18 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien	42 min
May 19, 3:26 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	34 min
May 19, 3:59 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien	46 min
May 19, 4:59 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	31 min
May 19, 5:27 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	33 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2004 Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.