Alert archive / Iowa / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 32, NWS Des Moines, IA

June 16, 1992Crawford County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 16, 1992, 9:59 PM CDT for Crawford County, Iowa. It was in force for 46 min. 1 report 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: Jun 16, 1992, 9:59 PM CDT (02:59 UTC)
Expired: Jun 16, 1992, 10:45 PM CDT
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Crawford County, IA

What was reported inside it

Time	Report	Where	Remark
Jun 16, 10:10 PM CDT	Tornado F3	Crawford, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Omaha, NE (KOVN), launched 00:00Z, 3.0 hours before the alert went out and 114 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4794 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1163 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 449 m²/s²
Significant tornado parameter: 8.2
Supercell composite: 39.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDSM 170259
SVRDSM
IAC047-170345-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
959 PM CDT TUE JUN 16 1992
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL IOWA
 
   ...WESTERN CRAWFORD COUNTY
 
AT 957 PM...DES MOINES RADAR INDICATED A SEVERE THUNDERSTORM 60 MILES
NORTHEAST OF OMAHA...OR NEAR CHARTER OAK.
 
THE SEVERE THUNDERSTORM WAS MOVING NORTHEAST AT 25 MILES AN HOUR.
PEOPLE IN THE COMMUNITIES OF CHARTER OAK...RICKETTS...DOW
CITY...SCHLESWIG AND KIRON ARE IN THE DIRECT PATH OF THIS STORM.
 
VERY LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING.  MOVE TO THE CENTER OF YOUR HOUSE...STAY AWAY
FROM WINDOWS...AND BE READY TO ACT QUICKLY IF A TORNADO DEVELOPS.
 
MYERS

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 16, 6:49 PM CDT, 3 hours 10 minutes before

IAZ003-007-008-011-170300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
650 PM CDT TUE JUN 16 1992

TORNADO WATCH NUMBER 376 HAS BEEN CANCELLED FOR EAST CENTRAL AND
NORTHEAST IOWA.  WTORNADO WATCH NUMBER 375 REMAINS IN EFFECT FOR PARTS
OF EXTREME WESTERN IOWA UNTIL 11 PM.

MYERS

Special weather statement, Jun 16, 7:39 PM CDT, 2 hours 20 minutes before

IAZALL-160140-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
740 PM CDT TUE JUN 16 1992

...A TORNADO WATCH REMAIN IN EFFECT UNTIL 11 PM FOR EXTREME WESTERN IOWA

AT{ 7 30 PM CDT...NO PRECIPITATION WAS OCCURRING IN THE STATE.

SCOTT

Local storm report, Jun 16, 7:51 PM CDT, 2 hours 8 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WATERLOO IA
750 PM CDT MON JUNE 16 1992

     ...STORM REPORTS OF MONDAY EVENING...

TIME           COUNTY          EVENT AND LOCATION

230 PM CDT    NORTHWEST        GOLF BALL SIZE HAIL WEST END OF CEDAR
              BLACK HAWK       FALLS.

240 PM CDT    W. BLACK HAWK    1/2 INCH HAIL AT UNI-DOME WEST CEDAR
                               FALLS.

250 PM CDT    NW. BLACK HAWK   1 INCH HAIL NORTH CEDAR FALLS.

300-302       N. BLACK HAWK    FUNNEL CLOUDS SIGHTED 1/2 MILE SOUTH OF
PM CDT                         WATERLOO MUNCIPAL AIRPORT AND 1 MILE
                               NORTHEAST OF AIRPORT. / TREE DAMAGE
                               CASTLE HILLS AREA OF CEDAR FALLS.
300-322     N. BLACK HAWK TORNADOES/LARGE TREE DAMAGE/
PM CDT                    DOWNED POWER LINES 4500 BLOCK
                          OF MT. VERNON ROAD NORTHEAST OF
                          WATERLOO MUNCIPAL AIRPORT.

344 PM CDT  S. BREMER     PEA-SIZE HAIL 2 MILES NORTHWEST OF
                          DENVER.

353-412     S. BREMER     MARBLE SIZE HAIL AND DOWNED TREES
PM CDT                    AT HWY 63/MILE MARKER 181.

UNKNOWN     W. BLACK HAWK 2 1/2 IN. HAIL IN NORTH CEDAR FALLS

OTHER REPORTS WILL FOLLOW WEDNESDAY 6/17/92

SPEECE

Special weather statement, Jun 16, 8:49 PM CDT, 1 hour 10 minutes before

IAZALL-160240-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
840 PM CDT TUE JUN 16 1992

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 11 PM FOR EXTREME WESTERN IOWA

AT 8 30 PM CDT...A FEW SPRINKLES 10 TO 30 MILES NORTH OF COUNCIL BLUFFS
WERE THE ONLY PRECIPITATION ACTUALLY OCCURRING IN THE STATE...HOWEVER
INTENSE THUNDERSTORMS WERE LOCATED IN WEST CENTRAL NEBRASKA ABOUT 25
MILES NORTHWEST OF COUNCIL BLUFFS.

THESE STORMS WERE MOVING NORTHEAST AT 30 MILES AND WILL BE ENTERING WEST
CENTRAL IOWA SHORTLY.

VERY HEAVY RAINS...HAIL...AND WINDS TO FIFTY MILES AN HOUR CAN BE
EXPECTED WITH THESE THUNDERSTORMS.

SCOTT

Special weather statement, Jun 16, 9:21 PM CDT, 38 minutes before

IAZ002-003-007-170300-

SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA
NATIONAL WEATHER SERVICE WATERLOO IA
920 PM CDT TUE JUN 16 1992

...TORNADO WATCH IN EFFECT FOR ALL OF NORTHEAST AND NORTH CENTRAL
IOWA UNTIL 5 AM CDT WED 17 JUNE...

AT 9 PM RADAR INDICATED NO THUNDERSTORM OR RAINSHOWER ACTIVITY
IN NORTHEAST OR NORTH CENTRAL IOWA. SKIES ARE MOSTLY CLOUDY WITH
TEMPERATURES IN THE LOW 70S TO LOW 80S. WINDS ARE SOUTHEAST AT
15 TO 25 MILES AN HOUR. DURING THE NEXT FEW HOURS SKIES WILL BE
PARTLY TO MOSTLY CLOUDY WITH TEMPERATURES FALLING TO THE MID TO HIGH
60S. WINDS WILL REMAIN SOUTHEAST AT 15 TO 25 MILES AN HOUR. SCATTERED
SEVERE THUNDERSTORMS ARE POSSIBLE.

DP

Special weather statement, Jun 16, 9:55 PM CDT, 4 minutes before

IAZALL-160340-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
940 PM CDT TUE JUN 16 1992

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 5 AM FOR NEARLY ALL OF IOWA...

AT 9 30 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAINS HAD MOVED
INTO WEST CENTRAL IOWA AND WERE LOCATED BETWEEN MONDAMIN AND ONAWA...ABOUT
40 MILES NORTH OF OMAHA.

VERY HEAVY RAINS...WINDS IN EXCESS OF FIFTY MILES AN HOUR AND HAIL CAN BE
EXPECTED WITH THE PASSAGE OF THESE THUNDERSTORMS.

SCATTERED THUNDERSTORMS WERE ALSO LOCATED IN THE REMAINDER OF WEST CENTRAL
AND NORTHWEST IOWA...GENERALLY WEST OF A LINE FROM DENISON TO SPIRIT LAKE.

THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST EAT 30 MILES AN HOUR.

SCOTT

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 16, 10:03 PM CDT	Tornado Warning	DMX	Crawford	42 min
Jun 16, 10:41 PM CDT	Severe Thunderstorm Warning	DMX	Dickinson	49 min
Jun 17, 3:44 AM CDT	Severe Thunderstorm Warning	DMX	Tama	22 min
Jun 17, 4:00 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy	45 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1992 Every severe thunderstorm warning in 1992

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.