Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 60, NWS Green Bay, WI
NWS Green Bay, WI issued this severe thunderstorm warning at Jul 21, 2002, 6:40 PM CDT for Marathon County, Portage County, Wood County, Wisconsin. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2002, 6:40 PM CDT (23:40 UTC)
- Expired
- Jul 21, 2002, 7:45 PM CDT
- In force
- 65 min
- Issued by
- NWS Green Bay, WI
- Area
- Counties, with a storm outline in the text
Counties Marathon County, WI, Portage County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 128 km from the middle of the area, began a volume at 23:39 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 21, 2:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 21, 4:25 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.7 hours before the alert went out and 310 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2410 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 1319 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
167
WUUS53 KGRB 212340
SVRGRB
WIC073-097-141-220045-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
637 PM CDT SUN JUL 21 2002
THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MARATHON COUNTY IN WISCONSIN
PORTAGE COUNTY IN WISCONSIN
WOOD COUNTY IN WISCONSIN
* UNTIL 745 PM CDT
* AT 637 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
LINE OF SEVERE THUNDERSTORMS WITH 60 MPH WINDS. THE LINE WAS
LOCATED FROM NEAR WAUSAU TO 25 MILES SOUTHWEST OF MARSHFIELD. THE
LINE WAS MOVING EAST AT 35 MPH.
* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORMS INCLUDE...
MARSHFIELD BY 645 PM CDT.
WESTON BY 645 PM CDT.
HOGARTY BY 645 PM CDT.
STEVENS POINT BY 730 PM CDT.
WISCONSIN RAPIDS BY 730 PM CDT.
IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE FOR WINDS IN EXCESS
OF 60 MPH...HAIL...AND DEADLY LIGHTNING. SEEK SHELTER IMMEDIATELY.
IF YOU ARE AT A LARGE OUTDOOR GATHERING...REMAIN CALM. FOLLOW THE
INSTRUCTIONS PROVIDED BY LOCAL AUTHORITIES.
LAT...LON 4513 8941 4466 9028 4429 9034 4447 8936
4511 8925
SKOWRONSKIWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Green Bay, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 5:15 AM CDT, 13 hours 25 minutes earlier.
Area forecast discussion, Jul 21, 5:15 AM CDT, 13 hours 25 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 515 AM CDT SUN JUL 21 2002 FORECAST CONCERNS INCLUDE ONGOING RAIN EVENT...AND CHANCES FOR LATER TODAY/TONIGHT. 08Z SURFACE ANAL SHOWS LOW PRESSURE OVER WEST-CENTRAL MN WITH WARM FRONT EXTENDING TO THE EAST OVER CENTRAL WI TO JUST NORTH OF GRB. COLD FRONT EXTENDS SOUTH THROUGH THE EASTERN DAKOTAS. WIND AND HEAVY RAIN EVENT ONGOING OVER NORTHERN COUNTIES WITH RADAR INDICATING TOTALS OF 1 TO 2 INCHES HAVE FALLEN IN SHORT TIME. REPORTS OF 40 TO 50 MPH WINDS WITH TREES DOWN HAVE BEEN RECEIVED FROM AREA SPOTTERS. MODELS HAVE DIVERGED SOME ON THIS RUN WITH AVN SHOWING FASTER...DEEPER SOLUTION THAN ETA. ETA IS MORE CONSISTENT WITH EARLIER RUNS...THOUGH HAS SHOWN SLIGHTLY SLOWER MOVEMENT WITH FRONTAL PASSAGE. NEITHER MODEL DOING WELL WITH QPF FIELDS. HAVE BASED FORECAST ON ETA AND CURRENT SAT TRENDS. DURING THIS PERIOD WESTERLY FLOW REGIME TO GIVE WAY AS RIDGE IN THE WEST BECOMES RE-ESTABLISHED PUTTING STATE BACK INTO COOLER NORTHWEST FLOW REGIME. COLD FRONT EXPECTED TO PUSH INTO NORTHWEST ZONES LATE IN THE DAY...THROUGH GREEN BAY DURING THE EARLY MORNING HOURS MONDAY. AFTER PASSAGE OF CURRENT MCS...EXPECT NEXT ROUND OF PCPN TO BE ASSOCIATED WITH PASSAGE OF COLD FRONT. MID LEVELS PRETTY WELL CAPPED WITH 700 TEMPS AT 10-12C. RRQ OF JET EJECTING OUT TO THE NORTHEAST TO PROVIDE GOOD LIFT LATE TODAY...TONIGHT AND WITH PWS AOA 2 INCHES...HEAVY RAIN EVENT LIKELY. HAVE PUT MENTION OF HEAVY RAIN IN ZONES. ENTIRE CWA IN SLIGHT RISK FOR SEVERE WITH VERY MOIST AIR OVER CWA AS DEW POINTS IN THE MID 70S PUSHING NORTH THROUGH CWA. SIG SHEAR AND INSTABILITY WITH CAPES NEAR 3K...WILL LIKELY LEAD TO DEVELOPMENT OF A FEW SUPERCELLS OVER AREA THIS EVENING. AFTER FRONTAL PASSAGE PUSHES THROUGH...CANADIAN HIGH PRESSURE TO DROP SOUTH OVER STATE FOR COOLER AND LESS HUMID CONDITIONS THROUGH MID WEEK. WITH CLOUDS FROM MORNING CONVECTION...HAVE STAYED WITH COOLER ETA TEMPS PER PREVIOUS PACKAGE. EXPECT HEAT INDICES AOA 100 IN SOUTHERN ZONES. NO CHANGES MADE TO EXTENDED. COORD WITH LSE...MQT...THANKS .GRB...NONE. TE WWW.CRH.NOAA.GOV/GRB
Hazardous weather outlook, Jul 21, 6:00 AM CDT, 12 hours 40 minutes before
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-211500- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 600 AM CDT SUN JUL 21 2002 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF CENTRAL...NORTH CENTRAL AND NORTHEAST WISCONSIN. SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT OVER NORTHEAST AND PARTS OF CENTRAL AND NORTH CENTRAL WISCONSIN. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS ACROSS ALL OF NORTHEAST AND NORTH-CENTRAL LATE THIS AFTERNOON AND TONIGHT. THE BEST CHANCE FOR SEVERE STORMS WILL BE AFTER 2:00 PM. DAMAGING WINDS AND LARGE HAIL ARE THE MAIN THREAT. HOT AND HUMID CONDITIONS OVER THE STATE TODAY WILL COMBINE TO PRODUCE HEAT INDICES AT OR AROUND 100 TODAY IN AREAS...MAINLY SOUTH OF A LINE FROM MARINETTE TO WAUSAU. A COLD FRONT MOVING THROUGH THE STATE LATER TODAY WILL PRODUCE THUNDERSTORMS AS IT INTERACTS WITH THIS WARM AND HUMID AIR. SPOTTER ACTIVATION MAY BE NECESSARY LATER THIS AFTERNOON OR TONIGHT. THIS OUTLOOK WILL BE UPDATED AT NOON TE WWW.CRH.NOAA.GOV/GRB
In the hours before
Special weather statement, Jul 21, 5:30 PM CDT, 1 hour 10 minutes before
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-220000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 530 PM CDT SUN JUL 21 2002 ...SEVERE THUNDERSTORMS EXPECTED THIS EVENING... SEVERE THUNDERSTORM WATCHES REMAIN IN EFFECT UNTIL 9 PM FOR NORTH-CENTRAL AND CENTRAL WISCONSIN...AND UNTIL 10 PM FOR NORTHEAST AND EAST-CENTRAL WISCONSIN. EARLIER THIS EVENING...THUNDERSTORMS WITH DAMAGING WINDS AND HAIL WERE REPORTED ACROSS NORTH-CENTRAL WISCONSIN. ADDITIONAL STORMS ARE EXPECTED AS THE EVENING WEARS ON. A SEVERE THUNDERSTORM WATCH MEANS THAT THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE. THE STORMS WILL ALSO PRODUCE TORRENTIAL RAINFALL. STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST INFORMATION ON THIS DANGEROUS WEATHER SITUATION. JKL WWW.CRH.NOAA.GOV/GRB
Local storm report, Jul 21, 5:38 PM CDT, 1 hour 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
538 PM CDT SUN JUL 21 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0442 PM ALVIN WI WIND DAMAGE
07/21/02 FOREST REPORTED BY SHERIFF. TREES
AND POWERLINES DOWN ACROSS
NORTHERN PART OF COUNTY.
SANDERSLocal storm report, Jul 21, 6:16 PM CDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
616 PM CDT SUN JUL 21 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0610 PM EDGAR WI 60 MPH WIND GUST
07/21/02 MARATHON REPORTED BY HAM RADIO
SPOTTER. COUNTY HIGHWAY H
AND STATE HIGHWAY 29.
SANDERSLocal storm report, Jul 21, 6:20 PM CDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
620 PM CDT SUN JUL 21 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0615 PM MERRILL WI WIND DAMAGE
07/21/02 LINCOLN REPORTED BY SHERIFF.
NUMEROUS TREES DOWN.
SANDERSLocal storm report, Jul 21, 6:27 PM CDT, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
627 PM CDT SUN JUL 21 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0455 PM FLORENCE WI WIND DAMAGE
07/21/02 FLORENCE TREES DOWN ACROSS NORTHERN
PART OF COUNTY. REPORT
FROM SHERIFF.
JKLSpecial weather statement, Jul 21, 6:30 PM CDT, 10 minutes before
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-220100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 630 PM CDT SUN JUL 21 2002 ...SEVERE THUNDERSTORMS EXPECTED THIS EVENING... SEVERE THUNDERSTORM WATCHES REMAIN IN EFFECT UNTIL 9 PM FOR NORTH-CENTRAL AND CENTRAL WISCONSIN...AND UNTIL 10 PM FOR NORTHEAST AND EAST-CENTRAL WISCONSIN. EARLIER THIS EVENING...THUNDERSTORMS WITH DAMAGING WINDS AND HAIL WERE REPORTED ACROSS NORTH-CENTRAL AND PORTIONS OF CENTRAL WISCONSIN. THESE STORMS ARE EXPECTED TO MOVE EASTWARD INTO NORTHEAST AND EAST CENTRAL WISCONSIN AS THE EVENING WEARS ON. A SEVERE THUNDERSTORM WATCH MEANS THAT THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE. THE STORMS WILL ALSO PRODUCE TORRENTIAL RAINFALL. STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST INFORMATION ON THIS DANGEROUS WEATHER SITUATION. KURIMSKI WWW.CRH.NOAA.GOV/GRB
The office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 3:34 AM CDT | Severe Thunderstorm Warning | GRB | Vilas | 41 min |
| Jul 21, 4:46 AM CDT | Severe Thunderstorm Warning | GRB | Oneida | 59 min |
| Jul 21, 3:27 PM CDT | Severe Thunderstorm Warning | GRB | Oneida, Vilas | 78 min |
| Jul 21, 4:30 PM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest | 75 min |
| Jul 21, 4:45 PM CDT | Severe Thunderstorm Warning | GRB | Oneida | 75 min |
| Jul 21, 5:46 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Marathon | 74 min |
| Jul 21, 5:59 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Marathon | 61 min |
| Jul 21, 6:04 PM CDT | Severe Thunderstorm Warning | GRB | Forest, Langlade | 56 min |
| Jul 21, 6:07 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Marathon | 53 min |
| Jul 21, 6:47 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Menominee, Oconto, Shawano | 73 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.