Alert archive / Iowa / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 111, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 22, 1998, 1:53 AM CDT for Adair County, Iowa. It was in force for 32 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 22, 1998, 1:53 AM CDT (06:53 UTC)
- Expired
- May 22, 1998, 2:25 AM CDT
- In force
- 32 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Adair County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 22, 2:20 AM CDT | Thunderstorm Wind 64 | Greenfield, IA | |
| May 22, 2:30 AM CDT | Hail 1 | Greenfield, 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 |
|---|---|---|---|
| May 21, 11:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 6.9 hours before the alert went out and 159 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
- 66 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 905 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 300 m²/s²
- 0-3 km storm-relative helicity
- 484 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 220653 RRA SVRDSM IAC001-220725- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 153 AM CDT FRI MAY 22 1998 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ADAIR COUNTY IN SOUTHWESTERN IOWA * UNTIL 225 AM CDT * AT 150 AM CDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 50 MILES WEST SOUTHWEST OF DES MOINES OR 2 MILES SOUTH SOUTHWEST OF GREENFIELD MOVING EAST AT 25 MPH. * THIS STORM CAN BE EXPECTED NEAR... GREENFIELD BY 152 AM CDT ORIENT BY 155 AM CDT LARGE HAIL AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS. A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN OCCUR IN SEVERE THUNDERSTORMS WITH LITTLE WARNING. PYTLAK
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, May 21, 11:41 PM CDT, 2 hours 12 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-221045- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 1141 PM CDT THU MAY 21 1998 HAZARD--AN OUTBREAK OF SEVERE THUNDERSTORMS PRODUCING WIND GUSTS TO 80 MPH. HAIL UP TO GOLFBALL SIZE AND AN ISOLATED TORNADO CANNOT BE RULED OUT. AREA OF CONCERN--SOUTH OF INTERSTATE 80. TIMING DETAILS--THROUGH 700 AM FRIDAY MORNING. METEOROLOGICAL COMMENTS--AN INTENSE BOW ECHO HAS ALREADY PRODUCED WIDESPREAD WIND DAMAGE OVER SOUTHWEST AND SOUTH CENTRAL IOWA WITH GUSTS AS HIGH AS 80 MPH. WHILE THIS BOW ECHO MARCHES INTO SOUTHEAST IOWA... ANOTHER BOW ECHO WAS DEVELOPING OVER EASTERN NEBRASKA. THIS ONE APPEARS TO BE JUST AS STRONG AND HAS HAD A HISTORY OF PRODUCING SOFTBALL SIZED- HAIL AND ISOLATED TORNADOES. AS THE NIGHT WEARS ON...THE HAIL THREAT WITH THIS NEW SQUALL LINE SHOULD DIMINISH BUT INCREASING WINDS ALOFT WILL ENHANCE THE POTENTIAL FOR DAMAGING WINDS. MANY AREAS THAT HAVE STRUCK ALREADY THIS EVENING ARE LIKELY TO BE HIT YET AGAIN OVERNIGHT. SINCE WINDS ARE GETTING STRONGER ALOFT...THIS SECOND BOW ECHO MAY STILL BE STRONG ENOUGH TO SPIN UP A TORNADO OR TWO...ESPECIALLY ON THE NORTH END OF THE BOW ECHOES. PRECAUTIONS--A TORNADO WATCH IS IN EFFECT FOR SOUTHWEST IOWA...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEAST IOWA UNTIL 500 AM. THIS IS A PARTICULARLY DANGEROUS SITUATION SINCE MANY PEOPLE MAY SLEEP THROUGH THIS SEVERE WEATHER AND NOT REACT IN TIME TO THE DANGER. TAKE COVER IF STRONG WINDS DEVELOP IN YOUR AREA AND MONITOR WEATHER RADIO...TELEVISION AND COMMERCIAL RADIO OVERNIGHT. PYTLAK
Local storm report, May 22, 12:34 AM CDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1234 AM CDT FRI MAY 22 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0915 PM ANITA IA WIND DAMAGE
05/21/98 CASS POWER POLES DOWNED.
NUMEROUS TREES BLOCKING
ROADS
0920 PM BRAYTON IA 1.75 INCH HAIL
05/21/98 AUDUBON
0920 PM 5 NW ATLANTIC IA 1 INCH HAIL
05/21/98 CASS
0920 PM 2 E ATLANTIC IA 60 MPH TSTM GUST
05/21/98 CASS HAIL OF UNKNOWN SIZE
COVERED THE GROUND
0920 PM 1 N ANITA IA TORNADO
05/21/98 CASS GRAIN BINS AND SHEDS
DESTROYED
0920 PM 6 N ANITA IA 70 MPH TSTM GUST
05/21/98 AUDUBON WINDOWS BLOWN OUT OF HOMES
0923 PM 3 N WIOTA IA 1 INCH HAIL
05/21/98 CASS
0923 PM 1 N ANITA IA 1 INCH HAIL
05/21/98 CASS
0924 PM BRAYTON IA WIND DAMAGE
05/21/98 AUDUBON TREES AND POWER LINES
DOWNED
0945 PM FONTANELLE IA WIND DAMAGE
05/21/98 ADAIR ROOF TORN OFF SCHOOL
0950 PM BRIDGEWATER IA 70 MPH TSTM GUST
05/21/98 ADAIR POWER LINES DOWNED
1030 PM MACKSBURG IA WIND DAMAGE
05/21/98 MADISON UNKNOWN DAMAGE TO
BUILDINGS. TREES DOWNED.
1030 PM TRURO IA WIND DAMAGE
05/21/98 MADISON TREES DOWNED
1035 PM 3 NW CRESTON IA WIND DAMAGE
05/21/98 UNION *** 1 INJ ***
CAMPERS OVERTURNED AT
GREEN VALLEY STATE PARK
1035 PM ADEL IA 60 MPH TSTM GUST
05/21/98 DALLAS
1040 PM TRURO IA WIND DAMAGE
05/21/98 MADISON TREES DOWNED
1108 PM 3 NW INDIANOLA IA WIND DAMAGE
05/21/98 WARREN LARGE TREES DOWNED
1130 PM 8 S HUMESTON IA WIND DAMAGE
05/21/98 WAYNE SHEDS DESTROYED. BUILDINGS
HEAVILY DAMAGED.
1140 PM LUCAS IA WIND DAMAGE
05/21/98 LUCAS POWER LINES DOWNED
1140 PM CORYDON IA WIND DAMAGE
05/21/98 WAYNE TREE DOWNED THROUGH HOUSE
1215 AM CENTERVILLE IA WIND DAMAGE
05/22/98 APPANOOSE TREES AND POWER LINES
DOWNEDLocal storm report, May 22, 12:36 AM CDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1236 AM CDT FRI MAY 22 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0915 PM ANITA IA WIND DAMAGE
05/21/98 CASS POWER POLES DOWNED.
NUMEROUS TREES BLOCKING
ROADS
0920 PM BRAYTON IA 1.75 INCH HAIL
05/21/98 AUDUBON
0920 PM 5 NW ATLANTIC IA 1 INCH HAIL
05/21/98 CASS
0920 PM 2 E ATLANTIC IA 60 MPH TSTM GUST
05/21/98 CASS HAIL OF UNKNOWN SIZE
COVERED THE GROUND
0920 PM 1 N ANITA IA TORNADO
05/21/98 CASS GRAIN BINS AND SHEDS
DESTROYED
0920 PM 6 N ANITA IA 70 MPH TSTM GUST
05/21/98 AUDUBON WINDOWS BLOWN OUT OF HOMES
0923 PM 3 N WIOTA IA 1 INCH HAIL
05/21/98 CASS
0923 PM 1 N ANITA IA 1 INCH HAIL
05/21/98 CASS
0924 PM BRAYTON IA WIND DAMAGE
05/21/98 AUDUBON TREES AND POWER LINES
DOWNED
0945 PM FONTANELLE IA WIND DAMAGE
05/21/98 ADAIR ROOF TORN OFF SCHOOL
0950 PM BRIDGEWATER IA 70 MPH TSTM GUST
05/21/98 ADAIR POWER LINES DOWNED
1030 PM MACKSBURG IA WIND DAMAGE
05/21/98 MADISON UNKNOWN DAMAGE TO
BUILDINGS. TREES DOWNED.
1030 PM TRURO IA WIND DAMAGE
05/21/98 MADISON TREES DOWNED
1035 PM 3 NW CRESTON IA WIND DAMAGE
05/21/98 UNION *** 1 INJ ***
CAMPERS OVERTURNED AT
GREEN VALLEY STATE PARK
1035 PM ADEL IA 60 MPH TSTM GUST
05/21/98 DALLAS
1040 PM TRURO IA WIND DAMAGE
05/21/98 MADISON TREES DOWNED
1105 PM OSCEOLA IA WIND DAMAGE
05/21/98 CLARKE TREES AND POWER LINES
DOWNED
1108 PM 3 NW INDIANOLA IA WIND DAMAGE
05/21/98 WARREN LARGE TREES DOWNED
1130 PM 8 S HUMESTON IA WIND DAMAGE
05/21/98 WAYNE SHEDS DESTROYED. BUILDINGS
HEAVILY DAMAGED.
1140 PM CORYDON IA WIND DAMAGE
05/21/98 WAYNE TREE DOWNED THROUGH HOUSE
1140 PM LUCAS IA WIND DAMAGE
05/21/98 LUCAS POWER LINES DOWNED
1215 AM CENTERVILLE IA WIND DAMAGE
05/22/98 APPANOOSE TREES AND POWER LINES
DOWNEDLocal storm report, May 22, 12:40 AM CDT, 1 hour 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1240 AM CDT FRI MAY 22 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1015 PM 5 W GREENFIELD IA 77 MPH TSTM GUST
05/21/98 ADAIRThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 8:54 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 31 min |
| May 21, 9:29 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Guthrie | 31 min |
| May 21, 10:04 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison | 41 min |
| May 21, 10:13 PM CDT | Severe Thunderstorm Warning | DMX | Union | 47 min |
| May 21, 10:32 PM CDT | Severe Thunderstorm Warning | DMX | Clarke | 48 min |
| May 21, 10:45 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 50 min |
| May 21, 11:01 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 44 min |
| May 21, 11:03 PM CDT | Severe Thunderstorm Warning | DMX | Lucas | 47 min |
| May 21, 11:17 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 48 min |
| May 21, 11:26 PM CDT | Severe Thunderstorm Warning | DMX | Marion | 49 min |
| May 21, 11:51 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Monroe | 49 min |
| May 22, 12:27 AM CDT | Severe Thunderstorm Warning | DMX | Davis | 48 min |
| May 22, 2:15 AM CDT | Severe Thunderstorm Warning | DMX | Madison | 45 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.