Alert archive / Iowa / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 56, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 31, 2000, 9:00 PM CDT for Worth County, Iowa. It was in force for 45 min. 5 reports 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
- May 31, 2000, 9:00 PM CDT (02:00 UTC)
- Expired
- May 31, 2000, 9:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Worth County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 9:13 PM CDT | Hail 0.75 | Manly, IA | |
| May 31, 9:34 PM CDT | Hail 1.75 | Hanlontown, IA | |
| May 31, 9:40 PM CDT | Hail 2 | Joice, IA | |
| May 31, 9:43 PM CDT | Hail 0.75 | Grafton, IA | |
| May 31, 9:50 PM CDT | Hail 1 | Grafton, 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.0 hours before the alert went out and 163 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1826 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KDMX 010216 SVRDSM IAC195-010245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING...RETRANSMISSION NATIONAL WEATHER SERVICE DES MOINES IA 900 PM CDT WED MAY 31 2000 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WORTH COUNTY IN NORTH CENTRAL IOWA * UNTIL 945 PM * AT 859 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER HANLONTOWN...OR ABOUT 15 MILES NORTHWEST OF MASON CITY...MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE... NEAR MANLY AROUND 930 PM NEAR GRAFTON AROUND 945 PM HAIL UP TO THE SIZE OF NICKELS IS LIKELY IN THE WARNED AREA. STAY AWAY FROM WINDOWS DURING A SEVERE STORM...WIND GUSTS OVER 70 MPH COULD BLOW THEM OUT. LAT...LON 4350 9349 4325 9349 4326 9304 4350 9304 SMALL NNNN
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 Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 31, 8:18 PM CDT, 42 minutes earlier.
Area forecast discussion, May 31, 8:18 PM CDT, 42 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 818 PM CDT WED MAY 31 2000 WILL KEEP THINGS SHORT THIS UPDATE. PER 01/00Z RAOBS...80H FRONT OVER NRN IA WITH CONVECTION FIRING OVER FAR NRN CWA ATTM. SFC FRONT NORTH OF OMA TO MIW TO DEH VCNTY WITH A TRIPLE POINT AROUND KADU AREA WHERE OLD OUTFLOW BOUNDARY HAS BEEN MOVING SLOWLY NORTH. BOUNDARY EXTENDS FROM NEAR ADU TO KBRL. GREAT SFC MOISTURE CONV...CAPES...LOW CINH...AND SO FORTH ALONG THIS BOUNDARY...BUT STILL A LITTLE CAP PER 01/00Z OMA SOUNDING. GUESS THAT'S WHY NOTHING IS GOING IN WHAT WE THOUGH WOULD BE INITIAL AREA AROUND ADU SOME HOURS AGO. ALL IN ALL...STILL LOOKS LIKE BEST CONVECTION TO NOW BE OVER NRN IA AND POINTS NORTH...AS 21Z RUC BLOWS BEST 80H MOIST CONV INTO SRN MN BY 06Z. HOWEVER STILL CAN'T RULE IT OUT COMPLETELY...BUT CHCS CERTAINLY DECREASING MAINLY ALONG AND S OF I-80. LITTLE IN THE WAY OF HELP NOTED ON THE H20 VAPOR EITHER. SO...DSM AND OTM TAFS HAVE BEEN UPDATED TO LOWER CONVECTION CHCS...AND ZFP WILL FOLLOW SHORTLY. WILL LIKELY HAVE TO TRIM SRN END OF FFA BEFORE NEWS TIME TOO...BUT WOULD LIKE FOR CONVECTION TO PLAY ITS HAND FIRST BEFORE MAKfING WHOLESALE CHANGES. .DSM...FFA TNGT IAZ006-007-016-017-025>028-036>039-047>050-061-062 SEARCY
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 9:32 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth | 43 min |
| May 31, 9:45 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 45 min |
| Jun 1, 5:34 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 26 min |
| Jun 1, 5:49 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 41 min |
| Jun 1, 5:55 PM CDT | Tornado Warning | DMX | Wapello | 35 min |
| Jun 1, 6:03 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 27 min |
| Jun 1, 6:30 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 30 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.