In the wake of a departing deep low pressure, west-southwest winds raked south-central and southeast Wisconsin on December 23rd with peak sustained speeds of 26 to 33 knots (30 to 38 mph), and/or peak gusts to 39 to 44 knots (45 to 51 mph). The media reported that wind-broken tree branches fell on power-lines, resulting in scattered power outages.
Every event with a place to put it; 9 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MKX wrote it up.
In the wake of a departing deep low pressure, west-southwest winds raked south-central and southeast Wisconsin on December 23rd with peak sustained speeds of 26 to 33 knots (30 to 38 mph), and/or peak gusts to 39 to 44 knots (45 to 51 mph). The media reported that wind-broken tree branches fell on power-lines, resulting in scattered power outages. At least 3000 customers were without power for a few hours across south-central and southeast Wisconsin. Specific peak sustained winds include 33 knots (38 mph) at Racine, 30 knots (35 mph) at Burlington, 29 knots (33 mph) at Fond du Lac, and 26 knots (30 mph) at all other locations. Specific peak wind gusts include 44 knots (51 mph) at Waukesha, 43 knots (49 mph) at Racine, 42 knots (48 mph) at Germantown, 40 knots (46 mph) at Burlington, and 39 knots (45 mph) at all other locations. Synoptically, low pressure deepened rapidly as it moved northeast through southeast Wisconsin on its way to the Upper Penesula of Michigan.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Milwaukee, WI wrote its last area forecast discussion before the first event at Dec 23, 3:49 AM CST, 1 hour 11 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
349 AM CST SUN DEC 23 2007
FORECAST FOCUS ON ONGOING WINTER STORM TODAY.
LATEST WATER VAPOR IMAGERY INDICATED A STRONG SHORTWAVE TROUGH
PUSHING NORTHEAST FROM MISSOURI INTO NORTHERN ILLINOIS...AHEAD OF
CLOSED UPPER LOW OVER SOUTHWEST MINNESOTA. AREA OF COLD CLOUD TOPS
AND SUBSEQUENT MODERATE TO HEAVY SNOWFALL OCCURRING OVER NORTH
CENTRAL TO SOUTHWEST WISCONSIN.
THIS AREA DRIVEN BY STRONG UPWARD VERTICAL MOTION FROM
DIFFERENTIAL CYCLONIC VORTICITY ADVECTION...POTENT LOW AND MID
LEVEL FRONTOGENESIS...AND LEFT FRONT QUADRANT OF JET STREAK. SOME
MID LEVEL INSTABILITY ALSO FOUND IN FORECAST SOUNDINGS ACROSS THE
REGION...WHICH HAVE BEEN REALIZED WITH SOME THUNDER REPORTS IN
EASTERN IOWA AND SOUTHWEST WISCONSIN. FAR WESTERN PORTIONS OF THE
FORECAST AREA SEEING SOME OF THE HEAVY SNOW ASSOCIATED WITH THESE
FEATURES.
SOME FREEZING RAIN AND SLEET ALSO SEEN WITH ENHANCED REFLECTIVITY
BANDS ON RADAR AT THE MADISON AIRPORT AND TO THE NORTH...POSSIBLY
DEPICTING BRIGHT BANDING. THIS AREA WAS LOCATED IN TRANSITION ZONE
BETWEEN RAIN IN EASTERN FORECAST AREA...AND SNOW IN THE WEST.
.SHORT TERM...TODAY AND TONIGHT...
RAIN STILL FALLING ACROSS MAINLY SOUTHEAST WISCONSIN...AS SURFACE
LOW MOVES ACROSS THAT AREA. RAIN SHOULD TRANSITION TO SNOW QUICKLY
ONCE DEEPENING SURFACE LOW MOVES NORTH BY 11Z TO 12Z SUNDAY.
LATEST HIGH RESOLUTION LOCAL MODELS INDICATING THAT THE MAIN
SYSTEM SNOW WILL EXIT TO THE NORTH OF THE FORECAST AREA BY 14Z TO
15Z SUNDAY AT THE LATEST. THIS SEEMS TO FIT WELL WITH TIMING OF
CURRENT PRECIPITATION IN NORTHERN ILLINOIS OUT OF THE FORECAST
AREA. MAY SEE A BRIEF LULL IN THE SNOW BEFORE BACK EDGE OF LIGHT
SNOW TO THE NORTH ROTATES AROUND UPPER LOW BACK INTO THE FORECAST
AREA. MAY SEE SOME LIGHT ACCUMULATIONS OF 1 TO 2 INCHES IN THE
NORTH TODAY...WITH LIGHTER AMOUNTS TONIGHT IN THE EAST.
OTHER ISSUE TODAY IS THE STRONG WINDS EXPECTED. TIGHTENING SURFACE
PRESSURE GRADIENT WITH OCCLUDING SURFACE LOW WILL BRING SUSTAINED
WEST TO SOUTHWEST WINDS OF 20 TO 26 KNOTS...WITH 39 KNOT GUSTS
MIXING DOWN FROM 1000 TO 2000 FEET. THIS SHOULD LEAD TO BLOWING
SNOW REDUCING VISIBILITIES AT TIMES.
GIVEN CURRENT TRENDS WITH SNOW...WILL MAINTAIN THE HEADLINES FOR
NOW. ONCE THE MAIN PRECIPITATION BAND MOVES TO THE NORTH OF THE
FORECAST AREA AROUND 14Z TO 15Z SUNDAY...THE MAIN ISSUE WILL BE
JUST THE WINDS AND BLOWING SNOW. ALREADY HAVE A WIND ADVISORY IN
THE EASTERN COUNTIES UNTIL 06Z MONDAY. DAY SHIFT MAY HAVE TO
REPLACE CURRENT HEADLINES WITH A WIND ADVISORY EVERYWHERE IF
VISIBILITIES WITH BLOWING SNOW ARE NOT REDUCED FREQUENTLY TO 1/4
MILE OR LESS.
TEMPERATURES WILL BE FALLING DURING THE DAY...AS STRONG COLD AIR
ADVECTION AFFECTS THE AREA. WILL FOLLOW COOLER 2 METER
TEMPERATURES AS GUIDANCE FOR TODAY AND TONIGHT.
.LONG TERM...MONDAY THROUGH SATURDAY...
HIGH PRESSURE RIDGE THEN MOVES ACROSS REGION FOR MONDAY AND
CHRISTMAS DAY...BRINGING GENERALLY QUIET WEATHER. ECMWF AND GFS
THEN SHOW SOUTHWEST FLOW CONTINUING ACROSS THE REGION THROUGH THE
WEEK. THEY DID INDICATE A FEW SHORTWAVE TROUGHS AFFECTING THE AREA
FROM MID TO LATE WEEK. WILL MAINTAIN POPS IN THESE PERIODS.
TEMPERATURES SHOULD REMAIN NEAR NORMAL THROUGH THIS PERIOD.
&&
.AVIATION...WIDESPREAD LIFR CEILINGS AND VISIBILITIES WILL
TRANSITION TO IFR CEILINGS AND VISIBILITIES DURING THE MORNING
HOURS AS A DEEP LOW PRESSURE MOVES NORTH ALONG THE WESTERN SHORE
OF LAKE MICHIGAN AND A COLD FRONT PUSHES EAST ACROSS SOUTHERN
WISCONSIN. HEAVY SNOW OVER SOUTHWEST WISCONSIN AND MIXED
PRECIPITATION OVER SOUTH CENTRAL WISCONSIN WITH LIGHT RAIN OVER
SOUTHEAST WISCONSIN WILL CHANGE OVER TO ALL SNOW DURING THE
MORNING HOURS FROM WEST TO EAST. CEILINGS AND VISIBILITIES WILL
BECOME MVFR BY AFTERNOON. VERY WINDY CONDITIONS WITH SUSTAINED
WEST WINDS 15 TO 25 KNOTS AND WIND GUSTS TO 39 KTS ARE EXPECTED
AFTER COLD FRONTAL PASSAGE AND THESE CONDITIONS WILL CONTINUE INTO
THE NIGHTTIME HOURS.
&&
.MARINE...A GALE WARNING IS IN EFFECT TODAY AND TONIGHT. STRONG
LOW PRESSURE WILL MOVE NORTHWARD ALONG THE WESTERN SHORE OF LAKE
MICHIGAN THIS MORNING. A STRONG COLD FRONT WILL PUSH ACROSS THE
NEARSHORE WATERS AROUND SUNRISE WITH WEST GALES DEVELOPING AND
LASTING THROUGH TONIGHT. RAIN EARLY THIS MORNING WILL GIVE WAY TO
AREAS OF LIGHT SNOW.
&&
.MKX WATCHES/WARNINGS/ADVISORIES...
WI...WINTER WEATHER ADVISORY UNTIL 6 PM CST THIS AFTERNOON FOR WIZ046-
047-051-057-063-068.
WINTER WEATHER ADVISORY UNTIL 6 AM CST EARLY THIS MORNING FOR
WIZ058-064-069.
WIND ADVISORY FROM 6 AM THIS MORNING TO MIDNIGHT CST TONIGHT FOR
WIZ052-058>060-064>066-069>072.
WINTER STORM WARNING UNTIL 6 PM CST THIS AFTERNOON FOR WIZ056-
062-067.
LM...GALE WARNING FROM 6 AM THIS MORNING TO 6 AM CST MONDAY FOR
LMZ643>646.
SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 6 AM CST EARLY
THIS MORNING FOR LMZ643>646.
&&
SHORT/LONG TERM...WOOD
AVIATION/MARINE...ZAJDELHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 450 PM CST SAT DEC 22 2007 WIZ046-047-051-052-056>060-062>072-231115- MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE- WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE- LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA- 450 PM CST SAT DEC 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN. .DAY ONE...TONIGHT A DENSE FOG ADVISORY IS IN EFFECT UNTIL 6 PM FOR MARQUETTE...GREEN LAKE... COLUMBIA...DANE...AND GREEN COUNTIES...AND UNTIL MIDNIGHT FOR SOUTHEAST WISCONSIN. A WINTER STORM WARNING IS IN EFFECT TONIGHT FOR SAUK...IOWA AND LAFAYETTE COUNTIES FOR 6 TO 8 INCHES OF SNOW AND GUSTY NORTHWEST WINDS TO 45 MPH. CONSIDERABLE BLOWING AND DRIFTING SNOW WILL RESULT...PRODUCING NEAR BLIZZARD CONDITIONS LATE TONIGHT. A WINTER WEATHER ADVISORY IS IN EFFECT BEGINNING AT 6 PM FOR MARQUETTE...GREEN LAKE...COLUMBIA...DANE...AND GREEN COUNTIES...AND BEGINNING AT MIDNIGHT FOR FOND DU LAC...DODGE...JEFFERSON...AND ROCK COUNTIES. RAIN WILL GRADUALLY TRANSITION TO SNOW AND SLEET THIS EVENING...AND EVENTUALLY TO ALL SNOW LATE TONIGHT. SNOW ACCUMULATIONS OF 2 TO 5 INCHES ARE EXPECTED...WITH THE HIGHEST AMOUNTS WEST OF MADISON. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A WINTER STORM WARNING WILL CONTINUE TO BE IN EFFECT SUNDAY FOR SAUK...IOWA AND LAFAYETTE COUNTIES. A WINTER WEATHER ADVISORY WILL CONTINUE TO BE IN EFFECT UNTIL 6 AM SUNDAY FOR DODGE...JEFFERSON...AND ROCK COUNTIES...AND UNTIL 6 PM FOR MARQUETTE...GREEN LAKE...COLUMBIA...DANE...GREEN...AND FOND DU LAC COUNTIES. A WIND ADVISORY IS IN EFFECT FOR MUCH OF SOUTHEAST AND A PORTION OF SOUTH CENTRAL WISCONSIN FROM 6 AM SUNDAY TO MIDNIGHT SUNDAY EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED BUT SNOWFALL MEASUREMENTS WOULD BE APPRECIATED. LMZ643>646-231115- SHEBOYGAN TO PORT WASHINGTON WI- PORT WASHINGTON TO NORTH POINT LIGHT WI- NORTH POINT LIGHT TO WIND POINT WI- WIND POINT WI TO WINTHROP HARBOR IL- 450 PM CST SAT DEC 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN. .DAY ONE...TONIGHT A DENSE FOG ADVISORY IS IN EFFECT UNTIL MIDNIGHT FOR THE NEARSHORE WATERS FOR VISIBILITIES NEAR ZERO. A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS WILL BE IN EFFECT FROM 9 PM THIS EVENING THROUGH LATE TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A GALE WARNING IS IN EFFECT FOR SUNDAY AND SUNDAY NIGHT. WEST WINDS ARE EXPECTED TO GUST TO 40 KNOTS DURING THIS PERIOD. HENTZ WWW.WEATHER.GOV/MILWAUKEE
The national radar mosaic for the moment the first event began.
9 strong wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2007Every state in 2007This day in weather historyWarnings in Wisconsin, December 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 70312, 70313, 70317, 70318, 70319, 70322, 70323, 70328, 70329.