Alert archive / Iowa / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 245, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 29, 1998, 5:41 PM CDT for Clarke County, Iowa. It was in force for 49 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
- Jun 29, 1998, 5:41 PM CDT (22:41 UTC)
- Expired
- Jun 29, 1998, 6:30 PM CDT
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Clarke County, IA
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 29, 4:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.7 hours before the alert went out and 219 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
- 2006 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 850 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
695 WUUS1 KDSM 292242 RRA SVRDSM IAC039-292330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA ISSUED BY NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 541 PM CDT MON JUN 29 1998 THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CLARKE COUNTY IN SOUTH CENTRAL IOWA * UNTIL 630 PM CDT * AT 540 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL 42 MILES SOUTH OF DES MOINES OR 7 MILES WEST OF WOODBURN MOVING EAST SOUTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WOODBURN AT 540 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. POWERS
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
Special weather statement, Jun 29, 1:25 PM CDT, 4 hours 16 minutes before
IAZ004>007-015>017-023>026-033>034-291930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 125 PM CDT MON JUN 29 1998 THE FOLLOWING COUNTIES OF TORNADO WATCH NUMBER 699 HAVE BEEN CLEARED FROM THE WATCH... EMMET - KOSSUTH - WINNEBAGO - WORTH - PALO ALTO - HANCOCK - CERRO GORDO - POCAHONTAS - HUMBOLDT - WRIGHT - FRANKLIN - SAC - AND CALHOUN. THE REMAINDER OF THE WATCH REMAINS IN EFFECT UNTIL 500 PM. IN ADDITION TORNADO WATCH NUMBER 700 REMAINS IN EFFECT UNTIL 500 PM FOR THE REST OF SOUTHERN AND EASTERN IOWA. THUNDERSTORMS WILL CONTINUE OVER THE CLEARED COUNTIES...HOWEVER THE THREAT OF SEVERE WEATHER HAS PASSED TO THE SOUTH.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 12:18 PM CDT | Severe Thunderstorm Warning | DMX | Carroll | 47 min |
| Jun 29, 12:24 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 36 min |
| Jun 29, 12:32 PM CDT | Tornado Warning | DMX | Hamilton | 33 min |
| Jun 29, 12:37 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 48 min |
| Jun 29, 12:41 PM CDT | Tornado Warning | DMX | Crawford | 49 min |
| Jun 29, 12:59 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 51 min |
| Jun 29, 1:09 PM CDT | Severe Thunderstorm Warning | DMX | Story | 36 min |
| Jun 29, 1:17 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 33 min |
| Jun 29, 1:20 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 50 min |
| Jun 29, 1:23 PM CDT | Tornado Warning | DMX | Boone, Dallas | 32 min |
| Jun 29, 1:32 PM CDT | Tornado Warning | DMX | Polk | 33 min |
| Jun 29, 1:39 PM CDT | Severe Thunderstorm Warning | DMX | Dallas | 31 min |
| Jun 29, 1:44 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Tama | 46 min |
| Jun 29, 1:48 PM CDT | Tornado Warning | DMX | Dallas, Madison | 47 min |
| Jun 29, 1:53 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 32 min |
| Jun 29, 2:04 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 21 min |
| Jun 29, 2:08 PM CDT | Severe Thunderstorm Warning | DMX | Poweshiek | 47 min |
| Jun 29, 2:08 PM CDT | Severe Thunderstorm Warning | DMX | Marion | 47 min |
| Jun 29, 2:11 PM CDT | Severe Thunderstorm Warning | DMX | Madison | 34 min |
| Jun 29, 2:18 PM CDT | Tornado Warning | DMX | Tama | 32 min |
| Jun 29, 2:23 PM CDT | Tornado Warning | DMX | Marion | 32 min |
| Jun 29, 2:28 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Monroe | 62 min |
| Jun 29, 2:28 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Warren | 62 min |
| Jun 29, 2:44 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 66 min |
| Jun 29, 2:55 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 65 min |
| Jun 29, 3:10 PM CDT | Tornado Warning | DMX | Davis | 35 min |
| Jun 29, 3:25 PM CDT | Tornado Warning | DMX | Dallas | 50 min |
| Jun 29, 3:27 PM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 48 min |
| Jun 29, 3:40 PM CDT | Tornado Warning | DMX | Polk | 35 min |
| Jun 29, 3:47 PM CDT | Tornado Warning | DMX | Warren | 33 min |
| Jun 29, 4:05 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion | 50 min |
| Jun 29, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | Taylor | 51 min |
| Jun 29, 6:00 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 35 min |
| Jun 29, 6:19 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 66 min |
| Jun 29, 6:25 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Wayne | 65 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.