Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

N/A

Humidity	NA
Wind Speed	NA
Barometer	NA
Dewpoint	N/A
Visibility	NA
Last update	* Not a current observation *

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Sully IA

Flood Watch August 14, 10:57pm until August 15, 10:00am

Click here for hazard details and duration

Flood Watch

Flood Watch August 14, 10:57pm until August 15, 10:00am
NOW until 10:00am Sat
Flood Watch
Tonight
Low: 74 °F
Heavy Rain
and Patchy
Fog
Saturday
High: 90 °F
Chance
Showers and
Patchy Fog
then Slight
Chance
T-storms
Saturday Night
Low: 69 °F
T-storms
Likely
Sunday
High: 83 °F
Chance
T-storms
Sunday Night
Low: 62 °F
Mostly Clear
Monday
High: 82 °F
Sunny
Monday Night
Low: 63 °F
Mostly Clear
Tuesday
High: 85 °F
Partly Sunny
then Slight
Chance
T-storms

Detailed Forecast

Tonight

A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Patchy fog before 1am, then patchy fog after 2am. Otherwise, cloudy, with a steady temperature around 74. East wind around 7 mph. New rainfall amounts between a half and three quarters of an inch possible.

Saturday

A chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 90. Heat index values as high as 106. South southeast wind around 7 mph becoming west northwest in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers and thunderstorms likely, mainly before 5am. Mostly cloudy, with a low around 69. North northwest wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Sunday

A 30 percent chance of showers and thunderstorms, mainly before 7am. Partly sunny, with a high near 83. Light northwest wind becoming north northwest 5 to 10 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Mostly clear, with a low around 62. North northwest wind 5 to 7 mph becoming calm in the evening.

Monday

Sunny, with a high near 82.

Monday Night

Mostly clear, with a low around 63.

Tuesday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.

Tuesday Night

Showers likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.

Wednesday

Partly sunny, with a high near 80.