Ice accumulation reports: January 17, 2011
11 measured ice accumulations were reported to the National Weather Service from freezing rain in the 24 hours ending 11 a.m. EST on January 17, 2011, in 3 states (IA, MT, SD). The largest was 0.25 inches of ice at Brockway, MT. 5 reports were a quarter inch or more, the usual ice storm warning amount, when tree limbs and power lines start to break.
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Ice reports
| Ice | Where | County | Time | Reported to | Source | Remarks |
|---|---|---|---|---|---|---|
| 0.25″ | 2 NW Glendive, MT | Dawson | Jan 16, 10:35 p.m. MST | NWS GGW | Trained spotter | 1/4 INCH OF ICE IN DRIVEWAY. FREEZING RAIN STILL OCCURRING. |
| 0.25″ | 1 S Brockway, MT | McCone | Jan 16, 10:45 p.m. MST | NWS GGW | Trained spotter | ESTIMATED 1/8 INCH TO 1/4 INCH OF ICE ON SURFACE. |
| 0.25″ | Brockway, MT | McCone | Jan 16, 10:50 p.m. MST | NWS GGW | Law enforcement | OFFICER REPORTED 1/4 INCH OF FREEZING RAIN ON HWY 200. FREEZING RAIN STILL OCCURRING. |
| 0.25″ | Circle, MT | McCone | Jan 16, 10:50 p.m. MST | NWS GGW | Law enforcement | OFFICER REPORTS 1/4 INCH OF ICE ON HWY 200. FREEZING RAIN STILL OCCURRING. |
| 0.25″ | Flowing Wells Rest Area, MT | McCone | Jan 16, 10:50 p.m. MST | NWS GGW | Law enforcement | OFFICER REPORTS 1/4 INCH OF FREEZING RAIN ON HWY 200. FREEZING RAIN STILL OCCURRING. |
| 0.20″ | 7 E Floris, IA | Davis | Jan 17, 9:16 a.m. CST | NWS DMX | Trained spotter | |
| 0.12″ | 3 NNE Heath Memorial Co, IA | Van Buren | Jan 17, 6:36 a.m. CST | NWS DVN | Trained spotter | MEASURED ON ELEVATED SURFACES. |
| 0.10″ | Atlantic, IA | Cass | Jan 17, 4:46 a.m. CST | NWS DMX | Broadcast media | FREEZING RAIN AND DUSTING OF SNOW. SLICK ROADS. |
| 0.10″ | Murray, IA | Clarke | Jan 17, 7:00 a.m. CST | NWS DMX | Trained spotter | |
| 0.07″ | 6 SE McIntosh, SD | Corson | Jan 16, 5:00 p.m. MST | NWS ABR | Co-op observer | FREEZING RAIN LASTED ABOUT ONE HALF HOUR |
| 0.01″ | 4 NE Kremlin, MT | Hill | Jan 16, 5:30 p.m. MST | NWS TFX | Trained spotter | FREEZING RAIN HAS COATED THE GROUND. LOCATION IS JUST NORTHEAST OF KREMLIN. |
Day: the 24 hours ending at 16:00 UTC (11 a.m. EST, 10 a.m. CST) on January 17, 2011, so morning observations count toward the day they end. Ice is the thickness of ice on surfaces as measured by the observer; reports of a trace (0.00″) are left out.
Spotter reports: National Weather Service Local Storm Reports (LSRs): measurements sent to NWS offices by trained storm spotters, CoCoRaHS and co-op observers, NWS staff, the public and others, archived by the Iowa Environmental Mesonet (Iowa State University). Reports are what each observer measured at one spot, often a storm total so far, and the NWS doesn't quality-check every one. Exact repeats count once.