The Storm Prediction Center in Norman, OK has issued a Severe Thunderstorm Warning for a large portion of Iowa until 10:00 AM Friday. A growing line of showers and thunderstorms in Nebraska will make their way into Iowa this morning.
They bring with them a primary threat of damaging winds but also small hail. The storms could develop into a fast moving bow line bringing with it destructive winds.
Here is a raw version of the text from the Storm Prediction Center:
HAIL TO 2 INCHES IN DIAMETER…THUNDERSTORM WIND GUSTS TO 70
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTH OF
COLUMBUS NEBRASKA TO 30 MILES NORTH OF OTTUMWA IOWA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU5).
REMEMBER…A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
DISCUSSION…CLUSTERS OF SUSTAINED TSTMS/POSSIBLE SUPERCELLS
EXPECTED TO PERSIST AND GRADUALLY INCREASE IN COVERAGE THROUGH DAWN
TODAY FROM ERN NEB INTO WRN/CNTRL IA…IN AREA OF STRENGTHENING LOW
LVL WAA DOWNSTREAM FROM CO UPR VORT. ACTIVITY EVENTUALLY MAY MERGE
INTO A LOOSELY-ORGANIZED FORWARD-PROPAGATING SYSTEM WITH EMBEDDED
BOWS. THREAT WILL EXIST FOR SVR HAIL AND DMGG WIND. TORNADO
POTENTIAL ATTM APPEARS LOW…WITH ANY SUCH THREAT LIKELY TIED TO
AVIATION…A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26035.