Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Fair

90°F

32°C

Humidity	62%
Wind Speed	S 7 mph
Barometer	30.02 in (1015.7 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	101°F (38°C)
Last update	17 Aug 11:53 am CDT

More Information:

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

Extended Forecast for

4 Miles SSE Martinsburg IA

This Afternoon
High: 92 °F
Sunny
Tonight
Low: 72 °F
Mostly Clear
Monday
High: 91 °F
Chance
T-storms
Monday Night
Low: 71 °F
Chance
T-storms
Tuesday
High: 86 °F
Slight Chance
T-storms
Tuesday Night
Low: 66 °F
Slight Chance
T-storms then
Partly Cloudy
Wednesday
High: 80 °F
Mostly Sunny
Wednesday Night
Low: 62 °F
Mostly Clear
Thursday
High: 80 °F
Sunny

Detailed Forecast

This Afternoon

Sunny, with a high near 92. Heat index values as high as 103. South wind around 6 mph.

Tonight

Mostly clear, with a low around 72. South southeast wind around 6 mph.

Monday

A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91. South wind 7 to 9 mph.

Monday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. South southwest wind around 6 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday

A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. North northwest wind 6 to 8 mph. Chance of precipitation is 20%.

Tuesday Night

A slight chance of thunderstorms before 7pm. Partly cloudy, with a low around 66. Chance of precipitation is 10%.

Wednesday

Mostly sunny, with a high near 80.

Wednesday Night

Mostly clear, with a low around 62.

Thursday

Sunny, with a high near 80.

Thursday Night

Mostly clear, with a low around 62.

Friday

Sunny, with a high near 84.