Tornado Watch 700

Issued

Jun 29, 1998, 1:00 PM CDT (18:00 UTC)

Expired

Jun 29, 1998, 5:00 PM CDT

In force

4 hr

Issued by

the Storm Prediction Center

The Des Moines radar (KDMX), 46 km from the middle of the area, began a volume at 18:01 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.

623 
WWUS9 KMKC 291742
SEL0  
MKC WW 291742
IAZ000-ILZ000-292200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 700
STORM PREDICTION CENTER NORMAN OK
1242 PM CDT MON JUN 29 1998

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTHERN AND EASTERN IOWA                               
   NORTHWEST ILLINOIS                           

EFFECTIVE THIS MONDAY AFTERNOON FROM 100 PM UNTIL 500 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 95 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 130 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES EAST OF LAMONI IOWA TO WATERLOO IOWA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 699...

DISCUSSION...SUPERCELLS EXPECTED TO INTENSIFY OVER IA THIS
AFTERNOON AS DESTABILIZATION OCCURS IN RESPONSE TO SURFACE HEATING
AND DISSIPATION OF OLD OUTFLOW BOUNDARY OVER MO.  AMPLE VERTICAL
SHEAR IN PLACE TO SUPPORT ROTATING STORMS...WITH 65 KT WNW FLOW
EXPECTED TO ENTER WRN PART OF IA BY MID AFTERNOON.  SURFACE
DEWPOINTS IN THE MID 70S SUGGEST GOOD TORNADO POTENTIAL DESPITE
RELATIVELY WEAK SURFACE-BASED CONVERGENCE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 80 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 28040.

...CORFIDI

403,0954 423,0945 423,0895 403,0904

Tornado Watches in Iowa, 1998Tornado Watches in Illinois, 1998Every tornado watch in 1998

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.