Champaign-Urbana

This morning, University of Illinois/Willard Airport is reporting low IFR conditions with a model index of 72:

KCMI 301245Z 14014KT 1 1/4SM -RA BR BKN003 BKN015 OVC095 17/16 A2991

The winds are from 140 at 14 knots, visibility 1.25 miles in light rain and mist. Broken layer at 300, broken 1500, overcast 9500. Temperature 62.6*F, dewpoint 60.8*F, relative humidity is 94 percent. The barometric pressure is 29.91

Expect Runway 18 - pressure altitude is 794, and density altitude is 4531

IFR and Crosswinds

KGDV 291255Z AUTO 05014G21KT 5SM BKN009 OVC047 06/04 A2988

Dawson Community Airport in Glendive is currently IFR with winds from 050 at 14 knots, gusting to 21 knots, visibility 5 miles. Broken layer at 900, overcast 4700. Temperature 42.8*F, dewpoint 39.2*F, relative humidity is 87 percent. The barometric pressure is 29.88 Wind chill 35*F

Another complication is the wind. On the longest runway, RWY 12, there is a left crosswind component of 14 knots.

METAR Decoding

Here is the current base METAR for San Antonio:
KSAT 281253Z 08006KT 1/8SM R12R/2600V3000FT -RA BR VV001 19/18 A3013

The wxJabber model index is 78 and conditions are LIFR. The METAR is decoded: San Antonio reporting winds from 080 at 6 knots, visibility 0.125 miles, and vertical visibility at 100 feet in light rain and mist. The RVR for Runway 12R is variable between 2600 and 3000 feet. The temperature 66.2*F, dewpoint 64.4*F, relative humidity is 94 percent. The barometric pressure is 30.13.

Historical data reveals that conditions at San Antonio have been LIFR since at least 3:00 A.M., and the TAF indicates soggy conditions for the rest of the day:

http://flightaware.com/live/airport/KSAT/wx

Corsicana, Texas

This is not the place to fly into or out of today. Currently, Corsicana is Low IFR with CAT II: winds 290 at 22 knots, gusting to 30 knots, visibility 3/4 miles in rain and mist. Few clouds at 1000, broken 1900, overcast 2600. Thunder Storms. Temperature 64.4*F, dewpoint 60.8*F, relative humidity is 88 percent. The barometric pressure is 30.05

For information about aviation weather check out FlightAware's weather page at http://flightaware.com/resources/weather_maps/

Tough weather in Austin

KAUS 171253Z 10007KT 1 1/2SM BR OVC003 19/19 A2991

Winds 100 at 6 knots. Visibility 1.5 miles in mist. Overcast 300 feet. Temperature is 66F (19C), dewpoint 66F (19C), relative humidity 100% Altimeter 29.91

CAT IIIb at Staunton

KSHD 161300Z AUTO 00000KT M1/4SM FG OVC001 04/04 A3031 * CAT IIIb

According to my calculations the conditions at KSHD would probably require a CAT IIIb approach to land. But then does KSHD have a low IFR approach? No...but after you execute your missed approach you can climb to 1900 then making a climbing left turn to 3600 and hold over the outer marker until conditions improve.

Staunton/Waynesboro/Harrisonburg reporting calm winds, visibility 0.25 miles in fog. Overcast layer at 100. Temperature 39.2*F, dewpoint 39.2*F, relative humidity is 100 percent. The barometric pressure is 30.31

http://flightaware.com/resources/airport/KSHD

Runway Visual Range

Real time access to RVR data at airports in the US. My favorite is the RVR Monitor. Currently Charlotte (KCLT), Memphis (BNA) and Baltimore/DC (KBWI) are indicating RVRs less than the cutoff of 6500 feet. The lowest is currently Charlotte with an RVR of 2000 feet, though the 1452Z METAR doesn't indicate this:

Charlotte reporting winds 242 at 4 knots, visibility 2.5 miles in mist. Overcast layer at 400. Temperature 55.4*F, dewpoint 53.6*F, relative humidity is 94 percent. The barometric pressure is 29.79

RVR Home
http://rvr.fly.faa.gov/rvr/index.html

RVR Monitor
http://rvr.fly.faa.gov/rvr-cgi-bin/rvr-status.pl