Alert archive / Iowa / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 1, NWS Des Moines, IA

February 25, 2000Greene County, Guthrie County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Feb 25, 2000, 6:26 PM CST for Greene County, Guthrie County, Iowa. It was in force for 29 min. No storm report in the archive falls 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.

The facts

Issued
Feb 25, 2000, 6:26 PM CST (00:26 UTC)
Expired
Feb 25, 2000, 6:55 PM CST
In force
29 min
Issued by
NWS Des Moines, IA
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Greene County, IA, Guthrie County, IA

The radar

The Des Moines radar (KDMX), 52 km from the middle of the area, began a volume at 00:26 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

Omaha, NE (KOAX), launched 00:00Z, 0.4 hours before the alert went out and 183 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2000-02-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2000-02-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2404 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
132 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.

000 
WUUS53 KDMX 260027
SVRDSM
IAC073-077-260100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
626 PM CST FRI FEB 25 2000

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GREENE COUNTY IN WEST CENTRAL IOWA
  NORTHEASTERN GUTHRIE COUNTY IN WEST CENTRAL IOWA

* UNTIL 655 PM CST

* AT 626 PM CST DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH
  LARGE HAIL 3 MILES SOUTHWEST OF JAMAICA...OR ABOUT 40 MILES
  NORTHWEST OF DES MOINES...MOVING NORTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR JAMAICA AROUND 630 PM CST
  NEAR RIPPEY AROUND 640 PM CST
  NEAR GRAND JUNCTION AROUND 650 PM CST
  NEAR DANA AROUND 700 PM CST

SEEK A STURDY SHELTER SUCH AS A BASEMENT OR INTERIOR ROOM!

THIS WARNING REPLACE THE PREVIOUS WARNING FOR GREENE COUNTY.

LAT...LON 4179 9448 4177 9428 4186 9429 4186 9417
          4208 9416 4220 9430

JOHNSON
NNNN

Nearby

Severe Thunderstorm Warnings in Iowa, 2000Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.