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January 31-February 2 Historic Winter Storm part 9


MidwestChaser

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woohoo boss said i can have tomorrow off :) Its already getting drifty outside with the snowbanks acting as snow fences. Measuring will be next to impossible. DTX updated forecast, snow amounts unchanged but decreased winds to gusts to 35mph instead of gusts to 40 mph. I noticed snow mixed with pellets at TOL. Too close for comfort, but mixing should be brief if it happens.

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3 or 4 inches of sleet here. I do not remember seeing to many sleet drifts but there are some just out my door at the moment. Driving through this much sleet is worse than an equivalent amount of snow. A ton more resistance and it is real easy to get stuck on level ground, at least with a two wheel drive.

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PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE NORTHERN INDIANA

818 PM EST TUE FEB 01 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...

..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....

..REMARKS..

0817 PM BLIZZARD 2 N NORTH WEBSTER 41.36N 85.70W

02/01/2011 KOSCIUSKO IN NWS OFFICE

CURRENTLY HEAVY SNOW FALLING WITH BLOWING AND DRIFTING.

VISIBILITY REDUCED TO ZERO.

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LOT Update:

//DISCUSSION...UPDATED 00Z... HEAVY SNOW AND STRONG WINDS ARE OCCURRING AT ALL TERMINALS. EXPECT LIFR/VLIFR CONDITIONS TO PERSIST THROUGH THE NIGHT AND INTO THE EARLY MORNING HOURS. THE PERIOD OF HEAVIEST SNOW WITH RATES OF 2 TO 3 INCHES PER HOUR ARE POSSIBLE BTWN 04Z AND 10Z. HAVE BEEN MONITORING A MID LEVEL DRY SLOT MOVING THROUGH CNTRL IL AND APPROACHING NRN IL. THERE IS A CHANCE THAT PCPN COULD SWITCH OVER TO A SNOW/SLEET MIX FOR A PERIOD EARLY THIS EVENING...BUT WILL HAVE TO MONITOR METARS FOR THAT POSSIBILITY. REGARDLESS OF PCPN TYPE...STRONG WINDS GUSTING AS HIGH AS 40-45KT SHOULD KEEP VISIBILITY GENERALLY LESS THAN 1/2SM THROUGH THE NIGHT. THERE COULD BE BRIEF PERIODS OF IMPROVING CONDITIONS WITH A LULL IN THE HEAVIER SNOW IF THE DRY SLOT MOVES OVER THE TERMINALS THIS EVENING. HOWEVER...CONDITIONS WILL DETERIORATE RAPIDLY WITH PREVAILING HEAVY SNOW RETURNING BY LATE EVENING AND CONTINUING OVERNIGHT. THE TIMING OF IMPROVEMENT REMAINS A QUESTION AND WILL BE DETERMINED BY HOW QUICKLY THE MAIN LOW PRESSURE SYSTEM MOVES OFF TO THE EAST AND HIGH PRESSURE BUILDS ACROSS THE MIDWEST. CURRENTLY FEEL THAT REDUCED VISIBILITY IN BLOWING SNOW WILL PERSIST INTO THE LATE AFTERNOON HOURS AS WINDS CONTINUE TO GUST TO ARND 25KT...BLOWING AROUND THE RELATIVELY LOW-WATER-CONTENT SNOW. KREIN

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It is impossible to tell how much has fallen here. I have bare ground and I have 20" drifts. I thought I saw lightning but didn't hear any thunder. Our power has flickered twice more.

I have a feeling my power is about to go. We are underground utilities but there are above ground nearby, probably feeding us.

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AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE QUAD CITIES IA IL

804 PM CST TUE FEB 1 2011

UPDATE

ABSOLUTELY ASTOUNDING BLIZZARD GOING ON OUT THE WINDOW THIS

EVENING. WIDESPREAD BLIZZARD CONDITIONS ARE BEING OBSERVED FOR ALL

BUT THE THREE HIGHWAY 20 COUNTIES IN IOWA...AND THE SNOW AND

BLIZZARD CONDITIONS ARE SPREADING NORTH. WE HAVE EVEN HAD

THUNDERSNOW AS FAR NORTH AS MERCER COUNTY...THE NEXT COUNTY SOUTH

FROM THE QUAD CITIES. THUNDERSNOW IS AN INDICATOR OF AN EXTREMELY

STRONG WINTER STORM...AND IS FREQUENTLY SEEN WITH EXTREME SNOWFALL

ACCUMULATIONS AS THE CONVECTIVE ELEMENTS ENHANCE THE SNOWFALL

RATES. WE ARE CURRENTLY SITTING UNDER A DEFORMATION ZONE THAT

EXTENDS FROM SOUTHWEST TO NORTHEAST ACROSS THE FOREAST AREA FROM

NEAR KEOSAUQUA MISSOURI TO EAST OF DUBUQUE. WE WILL BE SITTING

UNDER THIS DEFORMATION ZONE FOR SEVERAL MORE HOURS...AS IT EXTENDS

BACK TOWARDS KANSAS CITY AND WILL CONTINUE TO ROTATE ACROSS THE

AREA. WE EXPECT A GRADUAL DIMINISHMENT IN THE STRENGTH OF THIS

DEFORMATION ZONE...AND AN INTENSIFICATION OF ANOTHER TO OUR

SOUTHEAST...OVER NORTHERN AND CENTRAL ILLINOIS. THE WINDS CONTINUE

TO RIP AND ROAR...WITH SUSTAINED WINDS OF 25 TO 35 MPH...WITH SOME

GUSTS TO OVER 40 MPH. THE SURFACE LOW IS NEAR EVANSVILLE

INDIANA...WITH A STRONG PRESSURE FALL CENTER OVER EASTERN

ILLINOIS...AND A RISE OVER WESTERN TENNESSEE. WHILE THE SURFACE

LOW SHOULD CONTINUE TO MOVE NORTHEAST...UP ACROSS INDIANA AND INTO

NORTHERN OHIO BY MORNING. THIS WILL HELP TO MAINTAIN OUR VERY

STRONG SURFACE WINDS...ESPECIALLY WITH THE 925MB WINDS OF 50KTS

THROUGH MIDNIGHT AS ARE EXPECTED OVERNIGHT. HAVE MADE SOME

ADJUSTMENTS TO THE EVENT TOTAL SNOWFALL AMOUNTS...BUT ONLY TO

ADJUST THE 18-00Z SNOWFALL AMOUNTS TO THE AMOUNTS WE RECEIVED IN

REPORTS THIS EVENING. THIS HAS RESULTED IN A MINOR REDUCTION IN

EVENT TOTAL AMOUNTS...BUT NOT ENOUGH TO REDUCE THE ENORMOUS IMPACT

OF THE STORM. BLIZZARD WARNING REMAINS IN EFFECT...NO REASON TO

CHANGE AT THIS TIME.

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LocationTime<BR sab="36">(cst)Sky/WeatherTemp.<BR sab="39">(ºF)Dewpt.<BR sab="41">(ºF)Humidity<BR sab="43">(%)Wind<BR sab="45">(mph)Pressure<BR sab="47">(in)Huntingburg19:55Overcast524682S 12 G 1629.45Bloomington, Monroe County Airport19:53Light Rain Fog/Mist333296E 13 G 2129.48

Crazy temps. Gone up 6 degrees here in the last 30 minutes. Two stations above are just two tiers of counties apart.

edit: sorry that didn't come over well- Huntingburg 52 - Bloomington 33

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Is your existing snowcover still loose? I guess you've had recent snowfall? Everything here is a compact glacier. Only BS will be with the falling snow/fresh snowcover.

Keep the reports coming in Alan. :)

The snowcover is probably a foot and a half deep with maybe a 6 inch layer of powder on the top. We had some wind gusts around 30 kph about 15 minutes ago while I was walking the dog and it was plain ugly. Will be interesting to see what happens later if we get into any good stuff. What is the latest take on this area of the MW?

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
909 PM EST TUE FEB 01 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
           ..REMARKS..

0900 PM     SNOW             ANN ARBOR               42.28N 83.73W
02/01/2011  M2.2 INCH        WASHTENAW          MI   CO-OP OBSERVER

           4 HOUR SNOWFALL TOTAL. UPDATE FROM PREVIOUS REPORT.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
857 PM EST TUE FEB 01 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
           ..REMARKS..

0830 PM     SNOW             RIVERVIEW               42.17N 83.19W
02/01/2011  M2.0 INCH        WAYNE              MI   TRAINED SPOTTER

           3 HOUR TOTAL

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Really wish I could see the LDS data. Tough being at home for this event and not at work (where the blizzard conditions are always multiplied out at the airport). Instead I'm sitting in a completely dark apartment as quiet as can be hoping to see a flash or hear a rumble. Oh well, I do know one thing I can do at home that I can't do at work. :drunk:

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Heights are now tanking fast as the PV max rapidly deepens. Once this co-locates with the frontal zone--all heck will break loose across N IL and eastward. Cloud tops are rapidly cooling.

Your basically saying, more convective development is expected, how many hours should the convective snows be around?

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Heights are now tanking fast as the PV max rapidly deepens. Once this co-locates with the frontal zone--all heck will break loose across N IL and eastward. Cloud tops are rapidly cooling.

post-999-0-68940900-1296612628.png

Baroclinic Instability - You are absolutely on fire tonight - a 99 alarm blaze!!

Keep it up!

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Your basically saying, more convective development is expected, how many hours should the convective snows be around?

Yeah more will be developing. A solid 3-6 hours at least.

Baroclinic Instability - You are absolutely on fire tonight - a 99 alarm blaze!!

Keep it up!

I love weather! Everything is fascinating to me--this storm is truly something epic.

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