August 2011 Weather and Climate Review

     

Monthly Narrative Tri-Cities and Ord Details, and Monthly Extremes Graphs, Tables, Maps Drought Monitor Graphics

2011 Precipitation Totals and Archive of These Monthly Reviews

(Click on the tabs above to quickly jump to information located farther down the page)

August 2011 Weather Stories (Click HERE for archive to all web stories)

August:

August Tornado History for South Central Nebraska and North Central Kansas

August 1:

Grand Island Ties Record-Warm Minimum Temperature

August 6:

Severe Weather Summary (Eastern Parts of South Central Nebraska)

August 8:

Severe Weather Summary (Western Parts of South Central Nebraska)

August 8:

New Daily Rainfall Record at Hastings Municipal Airport

August 9:

Severe Weather Summary (Very Large Hail in North Central Kansas)

August 18:

Severe Weather Summary (Nance and Polk Counties in Nebraska)

August 30:

Heavy Rainfall Summary (Southern parts of South Central Nebraska)

 (*Please Note: All climate data presented here are preliminary and have not undergone final quality control by the National Climatic Data Center (NCDC). Therefore, these data are subject to revision. Final and certified climate data can be accessed at: WWW.NCDC.NOAA.GOV).

* Effective AUGUST 1st, the new set of 30-year climate averages, or "normals", from the National Climatic Data Center (NCDC) for 1981-2010 superseded the previous 30-year set of 1971-2000 normals on all NWS climate-related products. 


AUGUST 2011 CLIMATE REVIEW FOR SOUTH CENTRAL NEBRASKA AND PORTIONS OF NORTH CENTRAL KANSAS:

......Above-Normal Temperatures and Above-Normal Rainfall For Most (But Not All) of The Area...

The following narrative focuses on climate and weather highlights for the month of August 2011 across the NWS Hastings coverage area, encompassing 24 counties in south central and central Nebraska, and 6 counties in north central Kansas. Click HERE for a map of this coverage area. The temperature and precipitation data presented here are largely based on the NWS Cooperative Observer network, along with data from a handful of automated airport sites. Climate averages and "normals" for August 2011 presented here are the newly-released 1981-2010 normals.

TEMPERATURES
...Although the August heat was not as pronounced as that in July, average monthly temperatures across the majority of South Central Nebraska and north Central Kansas still checked in slightly on the warm side, with most areas between 0.1 and 2.0 degrees above the 30-year normal when factoring in both the daily highs and lows. As was the case in July, these slightly above-average temperatures were more a function of warm overnight lows, versus hot afternoon highs. Small portions of the area deviated from the slightly-warmer-than-normal trend, especially in the northeast, where Osceola in Polk County registered 0.9-degree below normal for the month. Examining temperature trends through the month, the first week of August was clearly the hottest, highlighted by the very first day of the month, when many locations broke into the 100-105 degree range across the southern half of the area. On the 1st, Beloit, KS, climbed all the way to 106 degrees, while Grand Island, NE, tied a record-warm minimum temperature with 77 degrees.  Following the hot opening week, the second week of the month checked in as the overall coolest, while the second half of the month generally featured typical August readings as a whole, despite a rather hot day on the 23rd.
In the Nebraska Tri-Cities, both the hottest-high and coolest-low of the month belonged to Grand Island, with 101 degrees on the 23rd, and 54 degrees on the 14th. For the Kearney airport, this was the sixth August in a row that the temperature failed to reach 100 degrees. Based on NWS Cooperative Observer and automated airport observations , a few temperature extremes across the coverage area included Beloit, KS, with 106 degrees on the 1st and Greeley, NE, with a low of 52 on the 14th. (Please look farther down the page for more information on August 2011 temperatures and extremes, including a detailed breakdown for Grand Island, Hastings, Kearney and Ord) 

PRECIPITATION...Given the highly variable nature of summer rainfall, it can sometimes prove difficult to generalize monthly precipitation trends for a 30-county area. However, based on dozens of observations from NWS cooperative observers and automated sites, roughly 75% of the NWS Hastings coverage area received near-normal to above-normal precipitation during August 2011, continuing a trend from July. This was certainly not the case for all areas, however, as discussed in the next paragraph. 

Based on 30-year normals, most of the area can expect to receive between
3.10-3.75 inches of rainfall in a "typical" August. While most locations met or exceeded this range, the six counties in North Central Kansas again stood out on the wet side of things, with most Kansas sites measuring between 4-6 inches, led by Hunter in southern Mitchell County with 6.88 inches. On the Nebraska side of the border, more variability existed, with above-average totals prevailing across most counties south of Interstate 80 and/or east of Highway 281. Within these areas, some of the highest totals included Blue Hill (4 miles SW) with 8.89 inches, Harlan County Lake with 7.93 inches, and the Hastings Municipal Airport with 4.90. In sharp contrast, however, several areas north of Interstate 80 and west of Highway 281 fell considerably short of normal rainfall for the month, particularly in parts of Sherman, Valley, northern Buffalo, northern Hall and southern Howard Counties. Within this corridor, many places only measured between 1.4 to 2.7 inches for the month. This included Loup City with only 1.77 inches (59% of normal) and Grand Island Central Nebraska Regional Airport at 2.30 inches (74 percent of normal). For the months of July and August combined, Ord fell 1.44 inches short of normal rainfall for the period. As a result of building dryness across some of these northwestern counties the past few months, the U.S. Drought Monitor introduced an abnormally dry designation across parts of the area on September 6th (see "Drought Status" section below for details).

Focusing on locations that measured considerable rainfall totals in a short time during the month, a few examples included:
- Harlan County Dam...3.60 inches, mainly during the early morning hours on the 30th
- Blue Hill (4 miles SW)...3.38 inches, mainly during the early morning hours of the 30th
- Damar KS...1.95 inches during the evening of the 9th, accompanied by golf ball to tennis ball size hail 
- Logan KS...1.86 inches during the evening of the 9th, accompanied by ping pong ball size hail

(Please look farther down the page for more information on August 2011 precipitation and extremes, including a detailed breakdown for Grand Island, Hastings, Kearney and Ord)  

DROUGHT STATUS
...According to the U.S. Drought Monitor status as of August 30th (shown at bottom of page), all but one tiny sliver of the 30-county area was free from drought issues, with this sole exception consisting of a an area of D0 (abnormally dry) conditions brushing extreme southwestern Rooks County in north central Kansas. However, just one week later on the September 6th product issuance, the recent stretch of dry weather across northern portions of South Central Nebraska resulted in the introduction of a small swath of abnormally dry D0 conditions affecting primarily portions of Sherman, Dawson and Buffalo Counties (these graphics not shown here). With September off to a rather slow start rainfall-wise for many areas, it is possible that future Drought Monitor issuances could expand this corridor of abnormally dry conditions. However, despite this recent introduction of abnormally dry conditions to small portions of the area, South Central Nebraska and North Central Kansas continue to fare much better than areas of southern Kansas and points south still enduring prolonged severe (D2) to exceptional (D4) drought.
(Please refer to the Drought Monitor graphics toward the bottom of the page for further details)

SEVERE WEATHER...Severe thunderstorm activity was rather typical for August, with at least a few rounds of large hail and/or damaging winds affecting relatively localized areas. Most of the severe storms focused early in the month on the 6th, 8th and 9th. The late afternoon and evening hours of the 9th featured the most noteworthy storm of the month, despite only affecting a small fraction of the area, as a large supercell storm pounded parts of Rooks and Phillips Counties in North Central Kansas with large hail from golf ball to softball size. No tornadoes were confirmed across the 30-county area during the month. **Please refer to the individual severe weather story links at the top of the page for further details**

Number of Severe Thunderstorm Warning polygons issued by NWS Hastings in August 2011:  43
Number of Tornado Warning polygons issued by NWS Hastings in August 2011:  4

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August 2011 Climate Details For Grand Island, Hastings, Kearney and Ord...Along With Temperature and Rainfall Extremes For NWS Cooperative Observer and Automated Airport Sites:

Click on the links below for the August 2011 climate summaries for Grand Island, Hastings, Kearney and Ord.

Grand Island     Hastings     Kearney           Ord

 

...AUGUST 2011 TEMPERATURE/PRECIPITATION EXTREMES FROM NWS HASTINGS COOPERATIVE OBSERVERS OR AUTOMATED ASOS/AWOS SITES...

...A FEW OF THE HOTTEST HIGH TEMPERATURES DURING AUGUST 2011

106 DEGREES...Beloit KS on the 1st (COOPERATIVE OBSERVER)
105 DEGREES...Alton KS (2 miles SW) on the 1st (COOPERATIVE OBSERVER)
104 DEGREES...Glen Elder Dam KS on the 1st (COOPERATIVE OBSERVER)
103 DEGREES...Superior NE (4 miles E) on the 1st (COOPERATIVE OBSERVER)
103 DEGREES...Oxford NE (6 miles NNW) on the 1st (COOPERATIVE OBSERVER)
103 DEGREES...Harlan County Dam NE on the 1st (COOPERATIVE OBSERVER)


...A FEW OF THE COOLEST LOW TEMPERATURES DURING AUGUST 2011

52 DEGREES...Greeley NE on the 14th (COOPERATIVE OBSERVER)
53 DEGREES...Ord NE on the 14th (AUTOMATED ASOS)
54 DEGREES...Grand Island NE on the 14th (AUTOMATED ASOS)
54 DEGREES...Ravenna NE on the 14th (COOPERATIVE OBSERVER)
55 DEGREES...Lexington NE on the 25th (AUTOMATED AWOS)


...A FEW OF THE HIGHEST MONTHLY RAINFALL TOTALS DURING AUGUST 2011 

8.89 Inches...Blue Hill NE (4 miles SW) in Webster County (Cooperative Observer)
7.93 Inches...Harlan County Lake NE (Cooperative Observer)
6.92 Inches...Hubbell NE in Thayer County (Cooperative Observer)
6.88 Inches...Hunter KS in Mitchell County (Cooperative Observer)
2.64 Inches...Nelson NE in Nuckolls County (Cooperative Obserer)

...A FEW OF THE LOWEST MONTHLY RAINFALL TOTALS DURING AUGUST 2011 

1.44 Inches...Ravenna NE in Buffalo County (Cooperative Observer)
1.77 Inches...Loup City NE in Sherman County (Cooperative Observer)
2.15 Inches...Arcadia NE in Valley County (Cooperative Observer)
2.21 Inches...Miller NE in Buffalo County (Cooperative Observer)
2.27 Inches...Dannebrog NE (4 miles NW) in Howard County (Cooperative Observer)
2.30 Inches...Grand Island Central Nebraska Regional Airport (Automated ASOS)

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Various graphs and tables depicting August 2011 climate data for South Central Nebraska and North Central Kansas:

(Please Note: THESE DATA ARE PRELIMINARY AND HAVE NOT UNDERGONE FINAL QUALITY CONTROL BY THE NATIONAL CLIMATIC DATA CENTER /NCDC/.  THEREFORE...THESE DATA ARE SUBJECT TO REVISION.  FINAL AND CERTIFIED CLIMATE DATA CAN BE ACCESSED AT WWW.NCDC.NOAA.GOV)  

Click Each Graph To Go To Monthly Temp/Precip Summary Pages
Grand Island Temperature Summary:  Observed daily maximum and minimum temperatures are connected by blue bars. Area between normal maximum and minimum temperatures is shaded green. Red bars connect record high temperatures. Blue bars connect record low temperatures. Hastings Temperature Summary:  Observed daily maximum and minimum temperatures are connected by blue bars. Area between normal maximum and minimum temperatures is shaded green. Red bars connect record high temperatures. Blue bars connect record low temperatures.

 

Click Images To Enlarge
 
Grand Island Airport Precipitation Summary:  Blue line indicates cumulative observed precipitation for August 2011. Red line indicates "normal" August precipitation based on 30-year data from 1981-2010. Hastings Airport Precipitation Summary:  Blue line indicates cumulative observed precipitation for August 2011.

 

Grand Island (Regional Airport) - August 2010 - August 2011

  Aug. 2010 September October November December January  February  March April May June July August
Average High (F)

89.1 

79.6 

 70.9 

50.1  

36.2 

28.5

 39.0

 48.6

61.5

71.5 

83.7

89.0

86.0

Average Low (F)

64.4   

 51.9

 40.3

25.8 

14.9 

8.7

15.8 

27.5 

38.1 

48.1 

59.9

69.8

63.5

Average Temperature (F)

76.7 

 65.8

55.6 

37.9 

25.6 

18.6

27.4 

38.1 

49.8

59.8 

71.8

79.4

74.7

Departure from Normal (F)

+3.1 

 +1.3

 +3.6

+1.5 

 0.0

-3.8

-0.8 

 -0.2

-0.1

 -0.8

+0.7 

+3.6

+0.7

 

Precipitation (inches)

 3.87

1.66 

 0.30  

0.44 

0.24 

1.49

 0.28 

1.02 

2.93 

8.70 

1.72

4.37

2.30

Departure from Normal

 +0.79

-0.77 

-1.21 

-0.97 

-0.42 

 +0.95

-0.40 

-1.02 

 +0.32 

+4.63 

-2.00

+1.23

-0.82

 

Snowfall (inches)

0.0 

0.0 

 0.0

T 

3.0 

18.7

 2.2 

 8.7 

 0.2 

 0.0 

 0.0

 0.0

0.0

 Departure from Normal

0.0 

-0.2 

 -1.0

-4.7 

-3.6

+12.5

-3.7 

+1.9 

 -1.3

  0.0

 0.0

 0.0

0.0

 Hastings (Municipal Airport) - August 2010 - August 2011

   Aug. 2010  September October November December January February March April

May

June

July

August

 Average High (F)

 88.6

 78.5

 70.5

50.5 

 36.2

28.6

 38.2

  49.2

 61.9

 71.1

83.1

 89.8

 84.3

Average Low (F)

 65.0

 53.2

41.5 

26.9 

 16.0

 10.2

 16.0

 28.4

38.6 

 48.3

60.8

 69.9

64.6 

Average Temperature (F)

 76.8

65.8 

 56.0

38.7 

 26.1 

  19.4

 27.1

38.8

 50.3

  59.7

71.9

 79.9

74.4 

 Departure  from Normal (F)

 +2.9

 +0.8

 +3.0

 +1.5

  -0.6

-4.2

 -2.5

 -0.3 

  -0.3

  -1.8

+0.2

 +3.8

 +0.1

 

Precipitation (inches)

2.86 

 2.70

  0.16

0.80 

0.28 

 1.00

 0.30

0.49 

  4.34

 5.03

 2.65

 4.96

4.90 

 Departure from Normal

 -0.32

  -0.04

 -1.51

 -0.66

-0.45 

 +0.45

 -0.37

 -1.59

+1.47

 +0.44

-0.94

+1.15

+1.60 

 

Snowfall (inches)

  0.0 

   0.0 

  0.0 

0.1 

3.3 

 20.0

5.2  

 4.4

 1.0

 0.0

0.0

 0.0

0.0 

Departure from Normal 

 0.0 

 -0.2

 -1.0

-3.4 

-2.7 

 +15.1

 -0.2 

 -1.3 

 -0.3

 0.0 

 0.0

 0.0

 0.0 

Kearney (Cooperative Observer and Airport)  - Aug. 2010 - Aug. 2011

 

Aug. 2010

 September

October

November

 December

January

February

March

April

May

June

July

August

Average High (F)

87.7

79.2

71.3 

 50.6

 36.4

29.7

38.2

 48.2

60.9

70.5

82.7

88.1

84.9

 Average Low (F)

63.5

 50.4

38.4 

 24.3

 13.5

8.5

 13.6

 25.7

 37.0

 45.8

59.2

68.4

63.9

Average Temperature (F)

75.6

 64.8

54.9

37.5

25.0 

19.1

25.9

 37.0

 49.0

58.2

71.0

78.2

74.4

  Departure from Normal (F)

+3.1 

 +1.3

+3.5

+1.7

-0.9 

-3.3

-1.7

0.0 

+0.8 

 -1.0

+1.2

+3.5

+1.8

         

Precipitation (inches)

3.47

1.02

0.34 

0.93 

0.14 

0.86

0.12

0.90 

3.45

7.53

4.51

4.07

3.72

 Departure from Normal

 +0.57

 -1.01

 -1.20 

-0.29 

-0.47 

+0.32

-0.49

  -1.15

+1.02

+3.41

+0.58

+0.79

+0.64

           

  Snowfall (inches)

 0.0

 0.0

 0.0

T 

 1.8

 15.6

4.7

11.7 

T

0.0 

0.0

0.0

0.0

 Departure from Normal

 0.0 

 -0.2

 -0.8

-4.8

-4.8 

+10.3

-0.4

 +6.1

 -2.0

0.0

0.0

0.0

0.0

  Ord (Evelyn Sharp Field Airport) - August 2010 - August 2011

   Aug. 2010  September October November December January

February

March

April

May

June

July

August

 Average High (F)

-

-

-

-

-

-  

 59.1

68.7

80.4

88.9

86.1

Average Low (F)

-

-

-

-

-

35.2 

44.9

57.0

67.6

61.4

Average Temperature (F)

-

-

-

 

-

-

 47.2

56.8

68.7

78.2

73.8

Departure  from Normal (F)

-

-

-

-

-

-

-

-

-1.6

-2.5

-0.5

+3.8

+0.8

 

Precipitation (inches)

-

-

-

-

-

-

-

-

  2.51

 4.90

4.16

2.23

2.46

 Departure from Normal

 -

  -

 -

 -

-

-

 -

-0.08

+1.09

+0.04 

-0.74

-0.70

 

Snowfall (Coop Observer)

  -

 

 -

-

 -

-

  -

-

 3.0

 0.0

0.0

0.0

0.0

Departure from Normal

 

 

 

 

 

 

 

 

+0.5

0.0

0.0

0.0

0.0

Smith Center KS (Cooperative Observer)  - Aug. 2010 - Aug. 2011

 

Aug. 2010

 September

October

November

 December

January

February

March

April 

May

June

July

August

Average High (F)

93.6

82.9

74.6

 54.0

 39.9

34.6

 40.6

52.8

 66.2

73.8

86.9

 95.8

89.5

 Average Low (F)

65.0

 54.6

42.8

 27.7

 17.6

10.8

 13.5

27.6

 38.1

 47.1

60.4

 69.2

 65.6

Average Temperature (F)

79.3

 68.8

58.7

40.9

28.8

22.7

 27.1

40.2

 52.1

60.5

73.7

 82.5

77.6

  Departure from Normal (F)

+2.1

 +0.6

+3.9

+0.5

0.0 

-5.0

-4.9 

-1.4 

 -0.4

 -3.3

-0.3

 +2.8

+0.4

         

Precipitation (inches)

2.23

1.68

0.12

1.20 

0.25

0.75

0.86 

0.54

 2.30

 9.45

4.82

 5.25

 5.03

 Departure from Normal

 -1.07

 -0.36

 -1.76 

-0.02

-0.41

+0.26

+0.28 

-1.33 

 +0.03 

+5.53

+1.21

+1.38 

+1.73

     

  Snowfall (inches)

 0.0

 0.0

 0.0

T 

 2.2

 10.2

 11.2 

3.4

0.0

0.0

0.0

0.0 

0.0

 Departure from Normal

 0.0 

 -0.2

 -0.4

-1.8

-1.0

+6.5

+7.1 

 +0.8

-0.6

0.0

0.0

0.0 

0.0

 

The following images depicting August Precipitation and Temperatures are courtesy of the High Plains Regional Climate Center:

Please note:
These maps are a "best-approximation" of actual measured values, and data reflected on these maps may not exactly match actual values due to the effects of interpolation and "smoothing" used to create the maps.

Click Images To Enlarge
Nebraska: August 2011 Precipitation (Inches) Kansas: August 2011 Precipitation (Inches)
  

 Nebraska: August 2011 Percent of Normal Precipitation (%) Kansas: August Percent of Normal Precipitation (%)
 

   
Nebraska: Aug. 2011 Temperature Departure from Normal (F) Kansas: August 2011 Temperature Departure from Normal (F)

   


The following drought status images, current as of August 30, 2011, are courtesy of the U.S. Drought Monitor:

Click Images To Enlarge

   
Nebraska U.S. Drought Monitor- as of August 30, 2011 Kansas U.S. Drought Monitor- as of August 30, 2011
 

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For more climate related information, check out the following websites:

This page was composed by the staff at the National Weather Service in Hastings, Nebraska.

 

 



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