The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| Event typeevent_type | Heavy Rain |
|---|---|
| NOAA NCEI event IDncei_event_id | 42,144 |
| Episode IDepisode_id | 7,331 |
| Begin UTCbegin_utc | 2007-08-22T01:00:00+00:00 |
| End UTCend_utc | 2007-08-22T05:00:00+00:00 |
| Statestate | IOWA |
| County/zone typecz_type | C |
| County/zone namecz_name | HUMBOLDT |
| Latitudelat | 42.720 |
| Longitudelon | -94.220 |
| End latitudeend_lat | 42.720 |
| End longitudeend_lon | -94.220 |
| Deaths directdeaths_direct | 0 |
| Deaths indirectdeaths_indirect | 0 |
| Injuries directinjuries_direct | 0 |
| Injuries indirectinjuries_indirect | 0 |
| Damage propertydamage_property | 0.00K |
| Damage cropsdamage_crops | 0.00K |
| Weather forecast office sourcewfo_source | Trained Spotter |
| Episode narrativeepisode_narrative | A nearly stationary frontal boundary remained draped east to west across Iowa once again. The atmosphere became very unstable during the afternoon with highs reaching the upper 80s to low 90s and dew points in the mid 70s to the south of the front. The environment at the beginning of the event showed a CAPE of 5000 to 6000 J/kg and lifted indices in the -9 to -12 C. range. The LCL was a little lower than the previous couple days and was around 1000 meters. The environment had a fair amount of shear, in the 35 to 50 kt range. Downdraft CAPE values were quite high with 1200 to 1700 J/kg available. Once again, the freezing level was quite high at around 15,000 feet, so in spite of the hail cape, CAPE in the -10 to -30 C. layer of the atmosphere, being 500 to 800 J/kg the hail size was restricted. Precipitable water values were in the 1.5 to 1.75 inch range. Thunderstorms formed in two areas. An area of thunderstorms formed over north west into north central Iowa. These were ahead of a line of intense thunderstorms that moved in from Nebraska during the early evening. Initially, the storms produced high winds. Winds of 70 to 80 MPH hit Pocahontas County in the Rolfe and Plover areas. Outbuildings and grain bins were blown over in Humboldt County in the Bradgate area, and a downburst occurred in the Worth County at Manley. Downburst winds also hit south of Bode in Humboldt County. High winds snapped off 40 utility poles in the area. There were numerous reports of trees and power lines down in northwest and north central Iowa. Late in the event, a small bow segment dropped southeast across Marshall County and produced a 59 MPH wind gust at the RWIS site there. The main event was the heavy rainfall and flash flooding. Soil conditions were extremely wet with many of the areas across northern Iowa receiving 6 to 12 inches of rain during the past week. The additional rain on the evening of the 21st caused considerable flash flooding. In Humboldt, for example, 5.7 inches of rain fell with the passage of the line. This lead to the evacuation of a care center in Humboldt. There were several reports of 2 to 4 inch rainfalls. The hardest hit counties were Pocahontas and Humboldt with a large area of greater than 4 inches of rain covering these counties. Following the flooding of the past few nights, the Governor Chet Culver gave a flooding disaster proclamation for 5 counties. They were Pocahontas, Palo Alto, Webster, Humboldt, Calhoun and Boone inside of the CWA, and Cherokee just outside of the CWA. School was canceled in many school districts for a good part of the week. |
| Event narrativeevent_narrative | Very heavy rainfall all occurred during the evening hours. |
| Yearyear | 2,007 |
Provenance
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