Month: January 2012

Posted on

Cold In Alaska

While Illinois enjoys a relatively mild winter, things are far different in Alaska. A colleague alerted me to these reports coming out of Alaska. I don’t know which is more impressive: the nighttime lows or the daytime highs.

REGIONAL TEMPERATURE AND PRECIPITATION ROUNDUP
NATIONAL WEATHER SERVICE FAIRBANKS AK
958 PM AKST SUN JAN 29 2012
 ALL VALUES ARE FOR 18 HOURS BETWEEN 3AM AND 9PM ALASKA
 LOCAL TIME TODAY
:
 SNOWFALL AND SNOW DEPTH DATA AVAILABLE ONLY AT AUGMENTED
 SITES
 PRECIPITATION DATA RELIABLE DURING THE WINTER ONLY AT
 AUGMENTED SITES
.B PAFG 0129 Z DH18/TXL/TNL/PPL/SF/SD
:
: ID           STATION            HI    LO    PCPN   SNOW SNOW
:                                                    FALL DEPTH
PAFA  : FAIRBANKS AIRPORT      : -38 / -51 /  0.01 /     /
PAEI  : EIELSON AFB            : -36 / -52 /    T  /     /
PANN  : NENANA                 : -26 / -54 /  0.00 /     /
PAMH  : MINCHUMINA             : -33 / -53 /       /     /
PAIN  : DENALI PARK            : -24 / -49 /       /     /
PABI  : DELTA JUNCTION         : -21 / -50 /  0.00 /     /
PAOR  : NORTHWAY AIRPORT       : -27 / -48 /    T  /     /   15
PAEG  : EAGLE                  :     /     /  0.00 /     /
PFYU  : FORT YUKON             : -51 / -62 /       /     /
PARC  : ARCTIC VILLAGE         : -42 / -54 /       /     /
PABT  : BETTLES                : -37 / -59 /  0.00 /     /   32
PAHL  : HUSLIA                 : -45 / -60 /       /     /
PAGA  : GALENA                 : -49 / -59 /    T  /     /
PAKV  : KALTAG                 : -44 / -56 /    T  /     /
PAMC  : MCGRATH                : -24 / -49 /  0.00 /     /   35
PAFS  : NIKOLAI                : -26 / -49 /    T  /     /
PANV  : ANVIK                  : -24 / -27 /       /     /
PAHC  : HOLY CROSS             : -25 / -30 /       /     /
:
PABR  : BARROW AIRPORT         : -19 / -24 /    T  /     /
PPIZ  : POINT LAY              : -19 / -24 /    T  /     /
PAWI  : WAINWRIGHT             : -14 / -20 /  0.00 /     /
PATQ  : ATQASUK                : -20 / -26 /       /     /
PAQT  : NUIQSUT                : -19 / -25 /  0.00 /     /
PASC  : DEADHORSE              : -18 / -25 /  0.00 /     /
PABA  : BARTER ISLAND          : -30 / -36 /  0.00 /     /
PAKP  : ANAKTUVUK PASS         : -31 / -36 /       /     /
:
PAOM  : NOME                   : -20 / -35 /  0.00 /     /
PAOT  : KOTZEBUE               : -32 / -39 /    T  /     /
PAPO  : POINT HOPE             :  -9 / -22 /       /     /
PAVL  : KIVALINA               : -24 / -27 /    T  /     /
PAWN  : NOATAK                 : -35 / -42 /       /     /
PAFM  : AMBLER                 :     /     /       /     /
PASH  : SHISHMAREF             : -17 / -24 /       /     /
PADE  : DEERING                : -19 / -38 /    T  /     /
PABL  : BUCKLAND               :     /     /       /     /
PAIW  : WALES                  :  -5 / -12 /       /     /
PATE  : TELLER                 :     /     /       /     /
PAGL  : GOLOVIN                : -27 / -35 /       /     /
PAKK  : KOYUK                  : -15 / -29 /       /     /
PAUN  : UNALAKLEET             : -17 / -27 /       /     /
PACM  : SCAMMON BAY            : -17 / -22 /       /     /
PAMK  : SAINT MICHAEL          : -23 / -26 /       /     /
PAEM  : EMMONAK                : -17 / -20 /       /     /
PASM  : SAINT MARYS            :  -9 / -17 /       /     /
.END
 COOPERATIVE OBSERVATIONS
 ALL VALUES ARE FOR 24 HOURS ENDING AROUND 9AM ALASKA
 LOCAL TIME TODAY
.B PAFG 0129 Z DH17/TX/TN/PPD/SF/SD
:
: ID           STATION            HI    LO    PCPN   SNOW SNOW
:                                                    FALL DEPTH
PATA  : TANANA                 : -47 / -61 /  0.00 /     /   20
GSCA2 : GOLDSTREAM CREEK       : -41 / -55 /  0.00 /  0.0/   17
FYKA2 : FORT YUKON #2          : -39 / -65 /  0.00 /  0.0/   22
FAOA2 : COLLEGE OBSERVATORY    : -38 / -48 /  0.00 /  0.0/   17
STHA2 : MILE 42 STEESE HWY     :     /     /       /     /
DNPA2 : DENALI PARK HQ         : -27 / -37 /  0.00 /  0.0/   23
HLYA2 : HEALY 2NW              : -30 / -41 /  0.00 /  0.0/    8
LMHA2 : LAKE MINCHUMINA        : -39 / -50 /  0.00 /  0.0/   18
CHSA2 : CIRCLE HOT SPRINGS     : -49 / -58 /  0.00 /  0.0/   20
PRCA2 : PORCUPINE RVR AT COLEEN:     /     /       /     /
RUBA2 : RUBY 14NE              :     /     /       /     /
BIGA2 : DELTA JUNCTION 20SE    : -40 / -58 /  0.00 /  0.0/   19
DDAA2 : DELTA 6N               :     /     /       /     /
PACA2 : PORT ALCAN             : -36 / -49 /  0.00 /  0.0/   13
CQNA2 : CHICKEN COOP           : -43 / -59 /  0.00 /  0.0/   14
EGLA2 : EAGLE                  : -40 / -57 /  0.00 /  0.0/   18
CCVA2 : COLVILLE VILLAGE       : -17 / -37 /    T  /    T/    8
WITA2 : WHITESTONE FARMS       : -38 / -52 /  0.00 /  0.0/   11
.END
 COOPERATIVE OBSERVATIONS
 ALL VALUES ARE FOR 24 HOURS ENDING AROUND 2PM ALASKA
 LOCAL TIME TODAY
.B PAFG 0129 Z DH23/TX/TN/PPD/SF/SD
:
: ID           STATION            HI    LO    PCPN   SNOW SNOW
:                                                    FALL DEPTH
GCQA2 : GILMORE CREEK          : -23 / -47 /  0.00 /  0.0/   16
DRYA2 : DRY CREEK              : -32 / -54 /  0.00 /  0.0/   26
TOFA2 : TOK FORESTRY           :     /     /       /     /
ACLA2 : ALPINE CREEK LODGE     :     /     /       /     /
.END
 COOPERATIVE OBSERVATIONS
 ALL VALUES ARE FOR 24 HOURS ENDING AROUND 6PM ALASKA
 LOCAL TIME TODAY
.B PAFG 0129 Z DH03/TX/TN/PPD/SF/SD
:
: ID           STATION            HI    LO    PCPN   SNOW SNOW
:                                                    FALL DEPTH
TOKA2 : TOK                    :     /     /       /     /
TOAA2 : TOK #2                 : -27 / -51 /  0.00 /  0.0/   22
GALA2 : GALENA                 : -50 / -65 /  0.00 /  0.0/   32
WSMA2 : WISEMAN                :     /     /       /     /
KOBA2 : KOBE HILL              :     /     /       /     /
PALP  : ALPINE                 : -18 / -31 /    T  /    T/   29
MISSI : MISSING                :     /     /       /     /
DIKA2 : KANDIK RIVER           : -52 / -64 /  0.00 /  0.0/   22
.END
 COOPERATIVE OBSERVATIONS
 ALL VALUES ARE FOR 24 HOURS ENDING AROUND 10PM ALASKA
 LOCAL TIME TODAY
.B PAFG 0129 Z DH06/TX/TN/PPD/SF/SD
:
: ID           STATION            HI    LO    PCPN   SNOW SNOW
:                                                    FALL DEPTH
AURA2 : AURORA/FAIRBANKS       : -40 / -51 /    T  /    T/   17
CSKA2 : CLEAR SKY              : -42 / -60 /  0.00 /  0.0/   18
NOPA2 : NORTH POLE             :     /     /       /     /
FMTA2 : FAIRBANKS MIDTOWN      :     /     /       /     /
.END
Posted on

New USDA Plant Hardiness Zone Map

The USDA has just released their new Plant Hardiness Zone Map. This is a much-needed update using the 30-year period of 1976-2005 versus the old USDA map which used the period 1974-1986.
One of the outstanding features of the new map is the northward shift of the hardiness zones in Illinois. For example, the boundary between zones 5 and 6 have shifted about 60 miles to the north. Zone 4 has left Illinois in the new map. In addition, the new map shows a lot more detail including the warming effect of the Chicago urban area (see map below).
In the second figure, the minimum winter temperature for each year is shown for Champaign-Urbana. The  old USDA plant hardiness zone map used an unusually short period during one of the colder periods in the record (1974-1986). The general trend in the data shows an increase in the minimum winter temperature from the late 1800s to about 1950, followed by a cooling trend to the 1980s, and finishing with a warming trend through 2005. Interestingly, the last few years showed a cooling trend – except for this year when our coldest temperature so far is 4°F.
The other important feature in the second figure is that even if an area changes Zones, there is still a lot of year to year variability in the minimum temperature for winter. For example, while Champaign-Urbana is nearly classified as Zone 6 in the new map, Champaign-Urbana dipped into Zone 4 a few times (-20°F or less) in the last 30 years.  In fact, as a gardener I would say that the period from the 1930s to the early 1970s was more benign and less challenging than the 1980s and 1990s with respect to winter temperatures. Summer conditions would be another story since the 1930s and 1950s were marred by severe droughts.
Click to enlarge.

Posted on

Severe Weather in January

It was somewhat strange seeing lightning and hearing thunder yesterday evening, considering that it was January. The NOAA Storm Prediction Center listed two reports of 1 to 1.5 inch hail around Mt. Vernon. There were other reports of high winds and wind damage such as trees down. Meanwhile, tornadoes were reported in Arkansas, Tennessee, Mississippi, and Alabama. You can see the preliminary report at http://www.spc.noaa.gov/climo/reports/120122_rpts.html
While tornadoes are rare in Illinois in January and the other winter months, they do occur. Here are the number of tornadoes by month for Illinois (first figure) and their distribution around the state (second figure). You can see more figures like these here and here.

Click to enlarge.

And here is their distribution across the state for January:
Click to enlarge.

Posted on

Getting Around Illinois in Winter

The Illinois Department of Transportation maintains a website called http://www.gettingaroundillinois.com/ According to the site,

Getting Around Illinois is a web-based interactive mapping site that provides the ability to search and display several sources of transportation data. You can find information on winter road conditions, average annual daily traffic, road construction, trucking routes, and planned road projects.

From that main page, you can get current winter road conditions at http://wrc.gettingaroundillinois.com/pages/wrc.htm. I have found this site to be very valuable for  making travel plans during or after a winter storm in Illinois.

Have you ever noticed the weather instruments alongside Interstate Highways? Those systems are called Road Weather Information Systems, or RWIS for short. They include weather sensors as well as roadway sensors to measure pavement temperatures and detect wet or icy conditions. Here is the link for the RWIS data in Illinois: http://www.gettingaroundillinois.com/mapviewer.aspx?mt=rwis