Alert archive / Iowa / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 89, NWS Des Moines, IA

June 23, 2000Mahaska County, Monroe County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 23, 2000, 12:54 PM CDT for Mahaska County, Monroe County, Iowa. It was in force for 36 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Jun 23, 2000, 12:54 PM CDT (17:54 UTC)
Expired: Jun 23, 2000, 1:30 PM CDT
In force: 36 min
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Mahaska County, IA, Monroe County, IA

The radar

The Des Moines radar (KDMX), 105 km from the middle of the area, began a volume at 17:54 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.

What was reported inside it

Time	Report	Where	Remark
Jun 23, 1:25 PM CDT	Thunderstorm Wind 52 E	Oskaloosa, IA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 23, 11:30 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 5.9 hours before the alert went out and 187 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: 2264 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 94 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.

491 
WUUS53 KDMX 231755
SVRDSM
IAC123-135-231830-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1254 PM CDT FRI JUN 23 2000

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MAHASKA COUNTY IN SOUTH CENTRAL IOWA
  NORTHERN MONROE COUNTY IN SOUTH CENTRAL IOWA

* UNTIL 130 PM

* AT 1249 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES NORTHWEST OF ALBIA...OR ABOUT 25 MILES
  WEST OF OTTUMWA...MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR BEACON AROUND 110 PM
  NEAR OSKALOOSA AROUND 120 PM
  NEAR ROSE HILL AROUND 130 PM

DAMAGING WINDS OF 60 TO 70 MILES AN HOUR ARE LIKELY IN THE WARNED
AREA.

STAY AWAY FROM WINDOWS DURING A SEVERE STORM...WIND GUSTS OVER 70 MPH
COULD BLOW THEM OUT.

LAT...LON 4132 9287 4101 9289 4102 9265 4116 9265
          4116 9242 4146 9241

SMALL
NNNN

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 23, 11:03 AM CDT	Severe Thunderstorm Warning	DMX	Madison, Warren	37 min
Jun 23, 11:25 AM CDT	Severe Thunderstorm Warning	DMX	Polk	35 min
Jun 23, 1:41 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	34 min
Jun 23, 2:17 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	43 min
Jun 23, 2:19 PM CDT	Tornado Warning	DMX	Wayne	26 min
Jun 23, 3:16 PM CDT	Flash Flood Warning	DMX	Wapello	119 min
Jun 23, 5:16 PM CDT	Flash Flood Warning	DMX	Wapello	119 min
Jun 23, 5:53 PM CDT	Flash Flood Warning	DMX	Monroe	2 hr
Jun 23, 6:25 PM CDT	Flash Flood Warning	DMX	Wapello	3 hr
Jun 23, 6:45 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	30 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2000 Every severe thunderstorm warning in 2000

Sources

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