Alert archive / Iowa / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 140, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 28, 1998, 10:15 PM CDT for Story County, Iowa. It was in force for 50 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 28, 1998, 10:15 PM CDT (03:15 UTC)
- Expired
- May 28, 1998, 11:05 PM CDT
- In force
- 50 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Story County, IA
The radar
The Des Moines radar (KDMX), 40 km from the middle of the area, began a volume at 03:17 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 28, 8:45 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 3.3 hours before the alert went out and 250 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
- 2333 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1689 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 290315 RRA SVRDSM IAC169-290405- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1015 PM CDT THU MAY 28 1998 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... STORY COUNTY IN CENTRAL IOWA * UNTIL 1105 PM CDT * AT 1013 PM CDT... STORM SPOTTERS REPORTED A SEVERE THUNDERSTORM 33 MILES NORTH OF DES MOINES OR 7 MILES SOUTHWEST OF ROLAND MOVING EAST SOUTHEAST AT 40 MPH. * THIS STORM CAN BE EXPECTED NEAR... ROLAND NOW AMES NOW HUXLEY BY 1016 PM CDT CAMBRIDGE BY 1021 PM CDT MCCALLSBURG BY 1022 PM CDT NEVADA BY 10.23 PM CDT GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. SEARCY
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.
In the hours before
Local storm report, May 28, 8:39 PM CDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
839 PM CDT THU MAY 28 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0340 PM POCAHONTAS IA TORNADO
05/28/98 POCAHONTAS TORNADO 6 MILES NORTHWEST
OF POCAHANTAS
0523 PM RADCLIFFE IA WIND DAMAGE
05/28/98 HARDIN SHINGLES BLOWN OFF ROOF
0542 PM GRUNDY CENTER IA 70 MPH TSTM GUST
05/28/98 GRUNDY JUST NORTH OF GRUNDY
CENTER
0553 PM BADGER IA 1.75 INCH HAIL
05/28/98 WEBSTERLocal storm report, May 28, 9:34 PM CDT, 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
934 PM CDT THU MAY 28 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0459 PM IOWA FALLS IA 3 INCH HAIL
05/28/98 HARDIN 80 MPH WINDSLocal storm report, May 28, 9:56 PM CDT, 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
956 PM CDT THU MAY 28 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0856 PM LAKE CITY IA TORNADO
05/28/98 CALHOUN LIMBS DOWN AND 1 INCH
HAIL...TORNADO REPORTED 4
E LAKE CITYLocal storm report, May 28, 10:13 PM CDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTION FOR FORMAT
NATIONAL WEATHER SERVICE DES MOINES IA
1013 PM CDT THU MAY 28 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0920 PM 1 N CHARTER OAK IA TORNADO
05/28/98 CRAWFORD REPORTED BY LOCAL FIRE
DEPARTMENT
0926 PM 1 N LANYON IA 1 INCH HAIL
05/28/98 WEBSTER
0940 PM 2 N SCHLESWIG IA .75 INCH HAIL
05/28/98 CRAWFORD
0951 PM 5 NW DENISON IA 1.75 INCH HAIL
05/28/98 CRAWFORD
1012 PM 3 SE DELOIT IA 1.75 INCH HAIL
05/28/98 CRAWFORD
SMALLLocal storm report, May 28, 10:13 PM CDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1013 PM CDT THU MAY 28 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0920 PM 1 N CHARTER OAK IA TORNADO
05/28/98 CRAWFORD REPORTED BY LOCAL FIRE
DEPARTMENT
0926 PM 1 N LANYON IA 1 INCH HAIL
05/28/98 WEBSTER
0940 PM 2 N SCHLESWIG IA .75 INCH HAIL
05/28/98 CRAWFORD
0951 PM 5 NW DENISON IA 1.75 INCH HAIL
05/28/98 CRAWFORD
1012 PM 3 SE DELOIT IA 1.75 INCH HAIL
05/28/98 CRAWFORD
SMALLLocal storm report, May 28, 10:13 PM CDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTION FOR FORMAT
NATIONAL WEATHER SERVICE DES MOINES IA
1013 PM CDT THU MAY 28 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0920 PM 1 N CHARTER OAK IA TORNADO
05/28/98 CRAWFORD REPORTED BY LOCAL FIRE
DEPARTMENT
0926 PM 1 N LANYON IA 1 INCH HAIL
05/28/98 WEBSTER
0940 PM 2 N SCHLESWIG IA .75 INCH HAIL
05/28/98 CRAWFORD
0951 PM 5 NW DENISON IA 1.75 INCH HAIL
05/28/98 CRAWFORD
1012 PM 3 SE DELOIT IA 1.75 INCH HAIL
05/28/98 CRAWFORD
SMALLThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 8:20 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 20 min |
| May 28, 8:24 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 36 min |
| May 28, 8:57 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 33 min |
| May 28, 9:22 PM CDT | Tornado Warning | DMX | Crawford | 33 min |
| May 28, 9:29 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 36 min |
| May 28, 9:41 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 34 min |
| May 28, 9:52 PM CDT | Tornado Warning | DMX | Crawford | 33 min |
| May 28, 10:21 PM CDT | Tornado Warning | DMX | Carroll, Crawford | 39 min |
| May 28, 10:21 PM CDT | Tornado Warning | DMX | Carroll, Crawford | 34 min |
| May 28, 10:40 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 50 min |
| May 28, 10:46 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 34 min |
| May 28, 10:50 PM CDT | Severe Thunderstorm Warning | DMX | Carroll | 35 min |
| May 28, 11:04 PM CDT | Tornado Warning | DMX | Carroll | 36 min |
| May 28, 11:10 PM CDT | Tornado Warning | DMX | Audubon | 35 min |
| May 28, 11:25 PM CDT | Tornado Warning | DMX | Greene, Guthrie | 35 min |
| May 28, 11:44 PM CDT | Tornado Warning | DMX | Audubon, Guthrie | 36 min |
| May 28, 11:59 PM CDT | Tornado Warning | DMX | Dallas, Guthrie | 51 min |
| May 29, 12:09 AM CDT | Severe Thunderstorm Warning | DMX | Audubon | 36 min |
| May 29, 12:24 AM CDT | Tornado Warning | DMX | Guthrie | 26 min |
| May 29, 12:33 AM CDT | Severe Thunderstorm Warning | DMX | Cass | 32 min |
| May 29, 12:50 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Dallas, Guthrie | 50 min |
| May 29, 1:24 AM CDT | Severe Thunderstorm Warning | DMX | Cass | 31 min |
| May 29, 2:01 AM CDT | Severe Thunderstorm Warning | DMX | Adams | 34 min |
| May 29, 2:01 AM CDT | Severe Thunderstorm Warning | DMX | Adams | 39 min |
| May 29, 2:21 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Union | 49 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1998Every severe thunderstorm warning in 1998
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.