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Dangerous Heat ends this evening with scattered severe storms

Dangerous Heat ends this evening with scattered severe storms
GOING TO HAVE TO LOOK OUT FOR SOME SEVERE WEATHER TONIGHT. THE THUNDERSTORMS ARE MAKING THEIR WAY OVER INTERSTATE 80 RIGHT NOW. BOY, YOU COULD SEE THE LIGHTNING. IT’S PRACTICALLY NONSTOP. THIS IS A LIVE LOOK FROM THE ROAD AT MILE MARKER 192, JUST BEYOND GRINNELL. YOU SEE THE LIGHTNING BOY JUST FLASHING IN AND OUT. IT’S LIKE LIKE THAT CAMERA HAS BECOME A STROBE CAMERA AND IT’S VERY ACTIVE TONIGHT. YEAH. AND WITH A LOT OF THOSE STORMS, WE’VE SEEN SO MUCH LIGHTNING WITH THOSE OVER HUNDREDS OF CLOUD TO GROUND LIGHTNING STRIKES WITH A LOT OF THOSE CELLS AND ESPECIALLY WHEN THEY’RE CLUSTERED TOGETHER LIKE THAT, UNFORTUNATELY, THAT LINE OF STORMS THAT WE’RE WATCHING ON THE RADAR BASICALLY RIGHT OVER I-80. SO IF YOU KNOW OF ANYONE TRAVELING ALONG GOING EAST OR WESTBOUND OF I-80, GOING IN OR OUT OF DES MOINES, THEY’RE GOING TO BE DEALING WITH THOSE STORMS, AT LEAST FOR THE TIME BEING. AND FOR OUR FRIENDS DOING RAGBRAI IN CORALVILLE. RAIN RIGHT ON YOUR DOORSTEP THERE AS WELL. WE’LL ZOOM IN A LITTLE BIT CLOSER HERE. MOST OF OUR SEVERE THUNDERSTORM WARNINGS, OR AT LEAST THE DESTRUCTIVE ONES, HAVE BEEN ALLOWED TO EXPIRE. THIS IS JUST A NORMAL SEVERE THUNDERSTORM WARNING, INCLUDING JASPER COUNTY AND POWESHIEK COUNTY. SO GRINNELL, YOU’RE INCLUDED IN THAT. NEWTON COLFAX AS WELL. AND THESE STORMS ARE SHIFTING OFF TO THE SOUTH AND TO THE EAST. CHECK OUT THE RAIN RATE, THOUGH, WHERE THESE PURPLES ARE. THAT’S WHERE YOU HAVE THE STRONGEST OR AT LEAST HEAVIEST RAIN AND DOWNPOURS THAT WE HAVE. SO RIGHT OVER NEWTON GRINNELL, RIGHT ALONG HIGHWAY SIX HERE DOWN THROUGH WILLIAMSBURG AND OVER TOWARDS MARENGO AS WELL, WE’VE GOT LOTS OF HEAVY RAIN THAT WE’VE BEEN TALKING ABOUT ALL EVENING, BUT ALSO STILL THE POTENTIAL FOR SOME DECENT SIZED HAIL WHERE THE PURPLES ARE. THAT’S INDICATIVE OF PROBABLY ABOUT AN INCH SIZED HAIL IN DIAMETER. AND THAT’S WHAT THE NATIONAL WEATHER SERVICE CONSIDERS SEVERE HAIL. SO ANYWHERE FROM ABOUT QUARTER SIZED HAIL FOR MOST OF THESE STORMS, RADAR INDICATING A LITTLE BIT LESS THAN THAT. BUT WE’VE GOTTEN REPORTS OF SOME A LITTLE BIT HEAVIER, THICKER HAIL, IF YOU WILL, SOME STRONGER HAIL DOWN TOWARDS PLACES LIKE WILLIAMSBURG AND JUST SOUTH OF MARENGO. SO WE’LL KEEP AN EYE ON THESE STORMS. AGAIN, THESE ARE ALL SHIFTING OFF TO THE SOUTH AND TO THE EAST. AND AGAIN, YOU’LL PROBABLY STILL HAVE AT LEAST SOME DECENT SIZED THUNDER OR AT LEAST LOUD THUNDER, LOTS OF LIGHTNING AND LOTS OF HEAVY RAIN HERE AS THOSE STORMS SLOWLY SINK OFF AGAIN TO THE SOUTH AND TO THE EAST. SO WE’LL KEEP AN EYE ON THOSE THAT SEVERE THUNDERSTORM WARNING, THOUGH, FOR JASPER POWESHIEK COUNTIES THAT WILL EXPIRE LIKELY AT 930. SO WE STILL HAVE JUST A LITTLE BIT MORE TIME LEFT ON THOSE STORMS. SO STORM REPORTS FROM EARLIER TODAY. WE HAD OF COURSE, THE TORNADO UP INTO FRANKLIN COUNTY JUST NORTH OF IOWA FALLS. THOSE ARE OUR ONLY TORNADO REPORTS HERE IN THE VIEWING AREA. BUT LOTS OF WIND DAMAGE AS WELL FROM THOSE STORMS AND HAIL DAMAGE EARLIER THIS EVENING. SEVERE THUNDERSTORM WATCH IN THE PINK BOXES STILL INCLUDES PORTIONS OF THE METRO AREA BACK INTO SOUTHWESTERN IOWA AND THEN NORTHEASTERN AND EASTERN IOWA. STILL INCLUDED IN THAT SEVERE THUNDERSTORM WATCH HERE THIS EVENING. A LITTLE BIT OF LIGHTNING OFF INTO THE DISTANCE FROM OUR DOWNTOWN CAM. TEMPERATURES ARE STILL WARM, STILL MUGGY, FEELING LIKE 100 DEGREES RIGHT NOW HERE IN DES MOINES. SO WE DIDN’T GET ANY RAIN. I DIDN’T REALLY HELP US THAT MUCH. PLACES THAT SAW THE RAIN COOLING OFF A LITTLE BIT QUICKER, 77IN MARSHALLTOWN, RIGHT NOW. CHECK OUT THE DEW POINTS. STILL EXTREMELY OPPRESSIVE AND MUGGY DOWN INTO SOUTHWESTERN PORTIONS OF THE STATE WHERE WE STILL HAVE DEW POINTS IN THE 80S, STILL FEELING MUGGY HERE IN DES MOINES, PLACES THAT SAW THE RAIN EARLIER, GOING BACK AND RECOVERING AT LEAST A LITTLE BIT HERE THIS EVENING. SO, AGAIN, THAT SEVERE THUNDERSTORM WATCH CONTINUES FOR THE NEXT COUPLE OF HOURS. HOUR-BY-HOUR FORECAST LOOKS LIKE THIS. THOSE STORMS, OR AT LEAST THE CLUSTER OF STRONGER STORMS IN EASTERN IOWA CONTINUE SLOWLY SINK OFF TO THE SOUTH AND TO THE EAST BY MIDNIGHT, I THINK WE CATCH A BREAK, A QUIET START TO THE DAY ON SATURDAY. WE COULD SEE A FEW STORMS ACROSS SOUTHWESTERN IOWA AS WE GO THROUGH THE DAYTIME HOURS OR LATE AFTERNOON HOURS TOMORROW. OTHERWISE, IT’S A LITTLE BIT COOLER TEMPERATURE WISE. BUT I THINK WE STILL KEEP THE HUMIDITY AROUND FOR THE WEEKEND, BUT NOT AS BAD AS WHAT WE SAW THIS WEEK. TONIGHT’S FORECAST INTO THE LOW 70S AND THEN TOMORROW’S FORECAST 80S ON THE BOARD MID TO UPPER 80S, SOMETHING WE HAVEN’T SEEN IN QUITE A FEW DAYS. EIGHT DAY FORECAST LOOKS LIKE THIS SLIM CHANCE FOR LEFTOVER SHOWER TOMORROW OR STORM AND THEN A FEW MORE ISOLATED STO
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Dangerous Heat ends this evening with scattered severe storms
Update 8:16 p.m. A Destructive Severe Thunderstorm Warning has been issued for Marshall, Tama, Jasper and Poweshiek Counties. The National Weather Service has issued a Severe Thunderstorm Watch, which is in effect through 12 a.m. on July 29.The following counties are included in the alert:Adair County, IA, Adams County, IA, Allamakee County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Crawford County, IA, Dallas County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Howard County, IA, Humboldt County, IA, Iowa County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Madison County, IA, Marshall County, IA, Mills County, IA, Mitchell County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Union County, IA, Warren County, IA, Webster County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA.Interactive Radar | Weather Alerts Forecast Discussion:An Excessive Heat Warning and a Heat Advisory remains in effect for much of Central Iowa until 9PM Friday. Just before 4pm Friday, air temperatures for many sites across the state were in the mid to upper 90s with heat indices ranging from 105 to 120 degrees thanks to very high dew points across the state. This immense amount of low-level heat and moisture has led to strong and extreme amounts of potential energy available for thunderstorms to develop as an upper-level disturbance and cold front move south toward Central Iowa. As of mid-afternoon, cumulus clouds have begun to develop along the front from just north of Omaha to Fort Dodge to Mason City. Thunderstorm development is likely around or just after 4pm, along and north of the HWY 20 corridors.Storms will likely grow upscale into complexes and track east and southeast through the evening into the overnight hours, with the best chance of seeing storms at least through midnight north of I-80. Some of high-resolution modeling still suggests the potential for a second complex of storms to develop during the predawn hours of Saturday and move across Southern Iowa.This complex of storms may too contain a risk for damaging winds and hail. Thunderstorm chances will dwindle by Saturday afternoon with slightly cooler air moving into the state. Cooler air will continue to spread in from the north through at least next Monday as a front likely stalls over southwestern Iowa.Any thunderstorm chances through Monday will primarily be confined to southwest Iowa, while cooler, drier air is in place over Central and Northeast portions of the state. Our next best chance for storms may not arrive until next Wednesday and Thursday.Iowa Weather Forecast:Friday Night: Scattered showers and storms. A few storms may be severe. Low around 74F. Winds S shifting to ENE at 5-15 mph.Saturday: Chance of a morning thunderstorm then partly to mostly cloudy. High near 88F. Winds NNE around 10-15 mph.Saturday Night: A few clouds. Low 67F. Winds NE at 10 to 15 mph.Sunday: Partly cloudy. Chance of a storm mainly in Southwest Iowa. High 84F. Winds SE at 10 to 15 mph.Sunday Night: Partly to mostly cloudy. Slight chance of a storm in southwest Iowa. Low 66F. Winds E at 5 to 10 mph.

Update 8:16 p.m. A Destructive Severe Thunderstorm Warning has been issued for Marshall, Tama, Jasper and Poweshiek Counties.

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The National Weather Service has issued a Severe Thunderstorm Watch, which is in effect through 12 a.m. on July 29.

The following counties are included in the alert:

Adair County, IA, Adams County, IA, Allamakee County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Crawford County, IA, Dallas County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Howard County, IA, Humboldt County, IA, Iowa County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Madison County, IA, Marshall County, IA, Mills County, IA, Mitchell County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Union County, IA, Warren County, IA, Webster County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA.

Interactive Radar | Weather Alerts

Forecast Discussion:

An Excessive Heat Warning and a Heat Advisory remains in effect for much of Central Iowa until 9PM Friday. Just before 4pm Friday, air temperatures for many sites across the state were in the mid to upper 90s with heat indices ranging from 105 to 120 degrees thanks to very high dew points across the state.

This immense amount of low-level heat and moisture has led to strong and extreme amounts of potential energy available for thunderstorms to develop as an upper-level disturbance and cold front move south toward Central Iowa. As of mid-afternoon, cumulus clouds have begun to develop along the front from just north of Omaha to Fort Dodge to Mason City. Thunderstorm development is likely around or just after 4pm, along and north of the HWY 20 corridors.

Storms will likely grow upscale into complexes and track east and southeast through the evening into the overnight hours, with the best chance of seeing storms at least through midnight north of I-80. Some of high-resolution modeling still suggests the potential for a second complex of storms to develop during the predawn hours of Saturday and move across Southern Iowa.

This complex of storms may too contain a risk for damaging winds and hail. Thunderstorm chances will dwindle by Saturday afternoon with slightly cooler air moving into the state. Cooler air will continue to spread in from the north through at least next Monday as a front likely stalls over southwestern Iowa.

Any thunderstorm chances through Monday will primarily be confined to southwest Iowa, while cooler, drier air is in place over Central and Northeast portions of the state. Our next best chance for storms may not arrive until next Wednesday and Thursday.

Iowa Weather Forecast:

Friday Night: Scattered showers and storms. A few storms may be severe. Low around 74F. Winds S shifting to ENE at 5-15 mph.

Saturday: Chance of a morning thunderstorm then partly to mostly cloudy. High near 88F. Winds NNE around 10-15 mph.

Saturday Night: A few clouds. Low 67F. Winds NE at 10 to 15 mph.

Sunday: Partly cloudy. Chance of a storm mainly in Southwest Iowa. High 84F. Winds SE at 10 to 15 mph.

Sunday Night: Partly to mostly cloudy. Slight chance of a storm in southwest Iowa. Low 66F. Winds E at 5 to 10 mph.