Alert archive / Wisconsin / Flash Flood Watches in 2018
Flash Flood Watch 2, NWS Green Bay, WI
NWS Green Bay, WI issued this flash flood watch at Jun 16, 2018, 3:30 AM CDT for 14 counties in Wisconsin. It was in force for 53 hr.
The area
The counties it named.
The facts
- Issued
- Jun 16, 2018, 3:30 AM CDT (08:30 UTC)
- Expired
- Jun 18, 2018, 8:29 AM CDT
- In force
- 53 hr
- Issued by
- NWS Green Bay, WI
- Flood severity
- None
Counties Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Portage County, WI, Shawano County, WI, Vilas County, WI, Waupaca County, WI, Wood County, WI
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 8.5 hours before the alert went out and 108 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1591 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 462 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
043 WGUS63 KGRB 160830 FFAGRB URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Green Bay WI 330 AM CDT Sat Jun 16 2018 ...SEVERAL ROUNDS OF HEAVY RAIN EXPECTED THROUGH MONDAY... .Showers and thunderstorms, heavy at times, are expected through Monday afternoon. Radar estimates that 2 to 4 inches, with locally higher amounts of 5 inches, has already fallen on Friday across far north-central Wisconsin. The additional rainfall will result in an increased risk for flash flooding, especially for locations near creeks and streams and in low-lying areas. WIZ005-010-161630- /O.NEW.KGRB.FF.A.0002.180616T0830Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida- Including the cities of Eagle River, Lac Du Flambeau, and Rhinelander 330 AM CDT Sat Jun 16 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY AFTERNOON... The National Weather Service in Green Bay has issued a * Flash Flood Watch for a portion of north central Wisconsin, including the following areas, Oneida and Vilas. * Through Monday afternoon * Several rounds of showers and thunderstorms are expected through Monday afternoon, which will produce heavy rainfall rates. This could lead to an additional 1 to 3 inches of rain, with locally higher amounts possible. * Locations across far north-central Wisconsin have already received 2 to 4 inches, with locally higher amounts of 5 inches on Friday. The additional rainfall on already saturated soils, could lead to flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Kurimski
10 follow-up statements
692 WGUS63 KGRB 162007 FFAGRB Flood Watch National Weather Service Green Bay WI 307 PM CDT Sat Jun 16 2018 ...SEVERAL ROUNDS OF HEAVY RAIN EXPECTED THROUGH MONDAY... .Periods of showers and thunderstorms with heavy rainfall are expected through Monday afternoon across north central Wisconsin. Recent heavy rain and the additional rainfall will result in an increased risk for flash flooding, especially for locations near creeks and streams and in low-lying areas. WIZ005-010-170415- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida- Including the cities of Eagle River, Lac Du Flambeau, and Rhinelander 307 PM CDT Sat Jun 16 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * A portion of north central Wisconsin, including the following areas, Oneida and Vilas counties. * Through Monday afternoon * Several rounds of showers and thunderstorms are expected through Monday afternoon. An additional 1 to 3 inches of rain, with locally higher amounts are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
722 WGUS63 KGRB 170203 FFAGRB Flood Watch National Weather Service Green Bay WI 903 PM CDT Sat Jun 16 2018 ...SEVERAL ROUNDS OF HEAVY RAIN EXPECTED THROUGH MONDAY... .Periods of showers and thunderstorms with heavy rainfall are expected through Monday afternoon across north central Wisconsin. Recent heavy rain and the additional rainfall will result in an increased risk for flash flooding, especially for locations near creeks and streams and in low-lying areas. WIZ005-010-171100- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida- Including the cities of Eagle River, Lac Du Flambeau, and Rhinelander 903 PM CDT Sat Jun 16 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * A portion of north central Wisconsin, including the following areas, Oneida and Vilas. * Through Monday afternoon * Several rounds of showers and thunderstorms are expected through Monday afternoon. An additional 1 to 3 inches of rain, with locally higher amounts, are possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Kieckbusch
122 WGUS63 KGRB 170914 FFAGRB Flood Watch National Weather Service Green Bay WI 414 AM CDT Sun Jun 17 2018 ...SEVERAL ROUNDS OF HEAVY RAIN EXPECTED THROUGH MONDAY... .Periods of showers and thunderstorms with heavy rainfall are expected through Monday afternoon across north central Wisconsin. Recent heavy rain and the additional rainfall will result in an increased risk for flash flooding. WIZ005-010-171715- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida- Including the cities of Eagle River, Lac Du Flambeau, and Rhinelander 414 AM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * A portion of north central Wisconsin, including the following counties...Oneida and Vilas. * Through Monday afternoon * Several rounds of showers and thunderstorms are expected through Monday afternoon. An additional 1 to 3 inches of rain, with locally higher amounts, are possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
342 WGUS63 KGRB 171701 FFAGRB Flood Watch National Weather Service Green Bay WI 1201 PM CDT Sun Jun 17 2018 ...ADDITIONAL HEAVY RAIN POSSIBLE THROUGH MONDAY... .Periods of showers and thunderstorms with heavy rain are expected through Monday afternoon in north central Wisconsin. Recent heavy rain and the additional rainfall could result in flash flooding. WIZ005-010-180115- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida- Including the cities of Eagle River, Lac Du Flambeau, and Rhinelander 1201 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * A portion of north central Wisconsin, including the following counties, Oneida and Vilas. * Through Monday afternoon * Several rounds of showers and thunderstorms are expected through Monday afternoon. An additional 1 to 3 inches of rain, with locally higher amounts, are possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
284 WGUS63 KGRB 171859 FFAGRB URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Green Bay WI 159 PM CDT Sun Jun 17 2018 ...ADDITIONAL HEAVY RAIN POSSIBLE THROUGH MONDAY... .Showers and thunderstorms with heavy rain are expected in central and northern Wisconsin, as a cold front moves slowly east across the region. Recent heavy rains and the expected rainfall could result in flash flooding. WIZ011>013-018-019-021-030-073-180300- /O.EXA.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Forest-Florence-Northern Marinette County-Lincoln-Langlade- Northern Oconto County-Marathon-Southern Marinette County- Including the cities of Crandon, Aurora, Commonwealth, Spread Eagle, Niagara, Wausaukee, Merrill, Tomahawk, Antigo, Mountain, Lakewood, Townsend, Wausau, Harmony, Peshtigo, Porterfield, Crivitz, High Falls Reservoir, Loomis, and Middle Inlet 159 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY AFTERNOON... The National Weather Service in Green Bay has expanded the * Flash Flood Watch to include portions of central Wisconsin, north central Wisconsin, and northeast Wisconsin, including the following areas, in central Wisconsin, Marathon county. In north central Wisconsin, Langlade and Lincoln counties. In northeast Wisconsin, Florence, Forest, Northern Marinette County, Northern Oconto County, and Southern Marinette County. * Through Monday afternoon * Showers and thunderstorms with heavy rain are expected tonight through early Monday. An additional 1 to 2 inches of rain, with locally higher amounts, are possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ WIZ005-010-180300- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida- Including the cities of Eagle River, Lac Du Flambeau, and Rhinelander 159 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * A portion of north central Wisconsin, including the following areas, Oneida and Vilas counties. * Through Monday afternoon * Showers and thunderstorms with heavy rain are expected tonight through early Monday. An additional 1 to 2 inches of rain, with locally higher amounts, are possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
651 WGUS63 KGRB 172236 FFAGRB Flood Watch National Weather Service Green Bay WI 536 PM CDT Sun Jun 17 2018 ...ADDITIONAL HEAVY RAIN POSSIBLE THROUGH MONDAY... .Showers and thunderstorms with heavy rain are expected in central and northern Wisconsin, as a cold front moves slowly east across the region. Recent heavy rains and the expected rainfall could result in flash flooding. WIZ005-010>013-018-019-021-030-073-180500- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Northern Oconto County-Marathon- Southern Marinette County- Including the cities of Eagle River, Lac Du Flambeau, Rhinelander, Crandon, Aurora, Commonwealth, Spread Eagle, Niagara, Wausaukee, Merrill, Tomahawk, Antigo, Mountain, Lakewood, Townsend, Wausau, Harmony, Peshtigo, Porterfield, Crivitz, High Falls Reservoir, Loomis, and Middle Inlet 536 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * Portions of central Wisconsin, north central Wisconsin, and northeast Wisconsin, including the following areas, in central Wisconsin, Marathon. In north central Wisconsin, Langlade, Lincoln, Oneida, and Vilas. In northeast Wisconsin, Florence, Forest, Northern Marinette County, Northern Oconto County, and Southern Marinette County. * Through Monday afternoon * Showers and thunderstorms with heavy rain are expected tonight through early Monday. An additional 1 to 2 inches of rain, with locally higher amounts, are possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ TSK
573 WGUS63 KGRB 180305 FFAGRB Flood Watch National Weather Service Green Bay WI 1005 PM CDT Sun Jun 17 2018 ...ADDITIONAL HEAVY RAIN POSSIBLE THROUGH MONDAY... .Showers and thunderstorms with heavy rain are expected in central and northern Wisconsin, as a cold front moves slowly east across the region. Recent heavy rains and the expected rainfall could result in flash flooding. WIZ005-010>012-180415- /O.CAN.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Vilas-Oneida-Forest-Florence- Including the cities of Eagle River, Lac Du Flambeau, Rhinelander, Crandon, Aurora, Commonwealth, and Spread Eagle 1005 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of north central Wisconsin and northeast Wisconsin has been cancelled. $$ WIZ013-018-019-021-030-073-181115- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Marinette County-Lincoln-Langlade-Northern Oconto County- Marathon-Southern Marinette County- Including the cities of Niagara, Wausaukee, Merrill, Tomahawk, Antigo, Mountain, Lakewood, Townsend, Wausau, Harmony, Peshtigo, Porterfield, Crivitz, High Falls Reservoir, Loomis, and Middle Inlet 1005 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * Portions of central Wisconsin, north central Wisconsin, and northeast Wisconsin, including the following areas, in central Wisconsin, Marathon. In north central Wisconsin, Langlade and Lincoln. In northeast Wisconsin, Northern Marinette County, Northern Oconto County, and Southern Marinette County. * Through Monday afternoon * Showers and thunderstorms with heavy rain are expected overnight through early Monday. An additional 1 to 2 inches of rain is possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ TSK
483 WGUS63 KGRB 180411 FFAGRB URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Green Bay WI 1111 PM CDT Sun Jun 17 2018 ...ADDITIONAL HEAVY RAIN POSSIBLE THROUGH MONDAY... .Showers and thunderstorms with heavy rain are expected in central and northeast Wisconsin, as a cold front moves slowly southeast across the region. Recent heavy rains and the expected rainfall could result in flash flooding. WIZ020-031-035>037-074-181100- /O.EXA.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Menominee-Shawano-Wood-Portage-Waupaca-Southern Oconto County- Including the cities of Keshena, Neopit, Shawano, Marshfield, Wisconsin Rapids, Stevens Point, Plover, New London, Waupaca, Clintonville, Little Suamico, Sobieski, Brookside, Oconto, and Pensaukee 1111 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY AFTERNOON... The National Weather Service in Green Bay has expanded the * Flash Flood Watch to include portions of central Wisconsin and northeast Wisconsin, including the following areas, in central Wisconsin, Portage and Wood. In northeast Wisconsin, Menominee, Shawano, Southern Oconto County, and Waupaca. * Through Monday afternoon * Showers and thunderstorms with heavy rain are expected overnight through early Monday. An additional 1 to 2 inches of rain is possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ WIZ013-018-019-021-030-073-181100- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Marinette County-Lincoln-Langlade-Northern Oconto County- Marathon-Southern Marinette County- Including the cities of Niagara, Wausaukee, Merrill, Tomahawk, Antigo, Mountain, Lakewood, Townsend, Wausau, Harmony, Peshtigo, Porterfield, Crivitz, High Falls Reservoir, Loomis, and Middle Inlet 1111 PM CDT Sun Jun 17 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... The Flash Flood Watch continues for * Portions of central Wisconsin, north central Wisconsin, and northeast Wisconsin, including the following areas, in central Wisconsin, Marathon. In north central Wisconsin, Langlade and Lincoln. In northeast Wisconsin, Northern Marinette County, Northern Oconto County, and Southern Marinette County. * Through Monday afternoon * Showers and thunderstorms with heavy rain are expected overnight through early Monday. An additional 1 to 2 inches of rain is possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ TSK
685 WGUS63 KGRB 180910 FFAGRB Flood Watch National Weather Service Green Bay WI 410 AM CDT Mon Jun 18 2018 ...ADDITIONAL HEAVY RAIN POSSIBLE THROUGH MONDAY... .Showers and thunderstorms with heavy rain are expected in central and northeast Wisconsin, as a cold front moves slowly southeast across the region. Recent heavy rains and the expected rainfall could result in flash flooding. WIZ013-021-073-074-181015- /O.CAN.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Marinette County-Northern Oconto County- Southern Marinette County-Southern Oconto County- Including the cities of Niagara, Wausaukee, Mountain, Lakewood, Townsend, Harmony, Peshtigo, Porterfield, Crivitz, High Falls Reservoir, Loomis, Middle Inlet, Little Suamico, Sobieski, Brookside, Oconto, and Pensaukee 410 AM CDT Mon Jun 18 2018 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for Marinette and Oconto counties has been cancelled. $$ WIZ018>020-030-031-035>037-181800- /O.CON.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lincoln-Langlade-Menominee-Marathon-Shawano-Wood-Portage-Waupaca- Including the cities of Merrill, Tomahawk, Antigo, Keshena, Neopit, Wausau, Shawano, Marshfield, Wisconsin Rapids, Stevens Point, Plover, New London, Waupaca, and Clintonville 410 AM CDT Mon Jun 18 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... The Flash Flood Watch continues for * Portions of central Wisconsin including the following areas... Marathon, Portage, Wood, Langlade, Lincoln, Menominee, Shawano, and Waupaca. * Until 1 PM CDT this afternoon * Showers and thunderstorms with heavy rain are expected overnight through early Monday. An additional 1 to 2 inches of rain is possible. * Flash flooding of urban areas, creeks and small streams may occur due to excessive rainfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
478 WGUS63 KGRB 181329 FFAGRB Flood Watch National Weather Service Green Bay WI 829 AM CDT Mon Jun 18 2018 ...THE HEAVIEST RAINS HAVE ENDED... .The slow moving cold front that brought heavy rain to the area was exiting the area this morning, and only lighter rain showers are expected. WIZ018>020-030-031-035>037-181430- /O.CAN.KGRB.FF.A.0002.000000T0000Z-180618T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Lincoln-Langlade-Menominee-Marathon-Shawano-Wood-Portage-Waupaca- Including the cities of Merrill, Tomahawk, Antigo, Keshena, Neopit, Wausau, Shawano, Marshfield, Wisconsin Rapids, Stevens Point, Plover, New London, Waupaca, and Clintonville 829 AM CDT Mon Jun 18 2018 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of central Wisconsin, north central Wisconsin, and northeast Wisconsin has been cancelled. The heavy rains have diminished, and only light showers are expected. $$
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Jun 16, 3:27 AM CDT, 3 minutes earlier.
Area forecast discussion, Jun 16, 3:27 AM CDT, 3 minutes before
Area Forecast Discussion National Weather Service Green Bay WI 327 AM CDT Sat Jun 16 2018 Forecast discussion for routine morning forecast issuance .SHORT TERM...Today...Tonight...and Sunday Issued at 326 AM CDT Sat Jun 16 2018 Early this morning some fog is possible as the very wet ground will combine with some radiational cooling with breaks in the clouds and falling temperatures. Any fog that forms this morning should mix out quickly after sunrise. Another difficult forecast is on tap for northeast Wisconsin with outflow and frontal boundaries across the entire region along with shortwaves embedded in the flow. To add further confusion models continue to offer differing opinions on how convection will evolve over the next few days. Current thinking is that the south will have the best shot at remaining dry today and tonight with a chance at another round of showers and thunderstorms across north-central and northeast Wisconsin as several shortwaves ride along the mid level ridge in place across the western Great Lakes. Any storms that form today and tonight have a marginal risk for severe weather, especially across the north where MUCAPEs are forecast to get as high as 4000 to 5000 J/kg. The main limiting factor will be the wind field as bulk shear values will only be around 20 knots. Therefore pulse type severe is the main anticipated mode if storms become severe today and tonight. Although highs across the south are expected to get to around 90 degrees, lingering outflow boundaries and clouds should prevent heat index values from reaching Heat Advisory criteria (100 degrees) this afternoon. Despite this, heat index values today could reach an uncomfortable middle to upper 90s across central and east-central Wisconsin away from the lake. By Sunday the frontal boundary approaches northwest Wisconsin, bringing the chance for additional showers and thunderstorms to north-central Wisconsin. Any storms that form across north-central Wisconsin Sunday will have 3000 to 4000 J/kg of MUCAPE to tap into along with increased bulk shear values of 20 to 30 knots. A shortwave is progged to track across this region on Sunday along the sagging frontal boundary, which will assist in storm development. Given the instability and better shear along with dynamics there is a slight risk for severe weather on Sunday, particularly Sunday afternoon when instability will be maximized. Meanwhile, further south temperatures are expected to soar into the lower to middle 90s with dew points around 70 degrees on Sunday. This should cause heat index values to reach around 100 degrees during the afternoon hours, possibly necessitating a Heat Advisory with subsequent forecast issuances. The main caveat is where convection will occur today and tonight and what sort of outflow boundaries and remaining cloud debris get left behind across the western Great Lakes on Sunday. Given the high degree of uncertainty regarding convection today and tonight will hold off on any heat headlines for Sunday. .LONG TERM...Sunday Night Through Friday Issued at 326 AM CDT Sat Jun 16 2018 Models continue to be in good agreement with the overall synoptic setup through early next week as the sub-tropical ridge flattens and a deep cut off low pressure system settles into the western U.S. By the middle to end of next week, models have slight differences on when the western low will eject out into the Plains. Main forecast challenge will be timing of a frontal passage (and associated precip) early in the week, severe/flooding chances and when the next chance of showers/storms arrives in the mid to late week. Shower/storm activity is likely across the region Sunday night into Monday as the frontal boundary will remain situated somewhere across central or northern WI Sunday evening and a low level jet pointed into the region. Where the heaviest precip will occur will again be a challenge to pin down this far out as activity on Sunday will determine where the low level jet, any outflow boundaries, and frontal boundary will end up. Precipitable waters remain in the 1.5 to 2.25 inch range ahead of the boundary, so heavy rain and flooding will continue to be a threat where the activity occurs. Severe weather threat looks highest Sunday evening as best instability will be present. But any complex of storms could track across the area through the night, bringing a hail and damaging wind threat. On Monday, best severe weather chances stay south of the area if the timing holds, as instability will be difficult to come by this far north due to precip and cloud cover as the boundary makes it way through the area before peak heating. If the front gets hung up at all, instability would be able to build ahead of the front across central and east central WI and severe weather chances would increase as another round/complex of storms forms along/near the boundary. The flattening ridge and high pressure building in from the northern Plains will continue to push the boundary south Monday night into Tuesday. Models is good agreement the front will make it near the IL border Monday night, however they differ on if precip will linger north of the boundary. Canadian/NAM actually show another complex of storms moving across the area, while the GFS and ECMWF push the system far enough to keep the area dry on Tuesday. Will use a blend for now, which gives the area slight chance POPs. Dewpoints look to fall into the 50s to around 60, so relief from the muggy conditions is expected. Wednesday and Thursday look dry as a high pressure ridge shifts eastward into the western Great Lakes. Temps look to be slightly above normal with comfortable humidity levels. Chances for showers and storms looks to return at the end of the week as the high pressure ridge slides to our east and a shortwave trough approaches from the west. && .AVIATION...for 06Z TAF Issuance Issued at 1037 PM CDT Fri Jun 15 2018 Most of the ongoing convection over central and east central WI (as of 0330z/Sat) should be out of the TAF sites by issuance time, so quiet conditions are anticipated early in the period. The exception may be some patchy fog and some borderline LLWS in parts of central and east central WI. Later on, the southwesterly low-level jet is expected to veer west, which should focus the best lift over far northeast WI. Scattered convection should move out of far NE WI Saturday morning, as additional storms develop over north central WI due to the arrival of a short-wave trough. A small chance of storms may persist at mainly the RHI TAF site in the afternoon and evening, due to the presence of a warm front, but confidence in the details is low. && .MARINE... Issued at 326 AM CDT Sat Jun 16 2018 As dewpoints climb today, dense fog is expected to develop on Lake Michigan. The fog is likely to persist tonight as winds stay southerly. On Sunday, winds are expected to veer slightly, which could push the fog offshore for some locations, but spots toward northern Lake Michigan may see the fog continue through the day. && .HYDROLOGY... Issued at 326 AM CDT Sat Jun 16 2018 MRMS estimates 2 to 4 inches, with locally higher amounts close to 5 inches, fell across far north central Wisconsin in the last 24 hours. Given several more rounds of heavy rain are expected through Monday with PWAT values of 1.75 to 2.25 during this period, some flash flooding is possible across this already soaked area through Monday. Therefore will issue a Flash Flood Watch for Oneida and Vilas Counties where the heaviest rain has already fallen with more heavy rain expected on the way during the next few days. Depending on where the heavy rain falls during the next few days, the watch may be expanded to include additional areas. && .GRB WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch through Monday afternoon for WIZ005-010. && SHORT TERM.....Kurimski LONG TERM......Bersch AVIATION.......Kieckbusch MARINE.........Bersch HYDROLOGY......Kurimski
Hazardous weather outlook, Jun 15, 2:40 PM CDT, 12 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Green Bay WI 240 PM CDT Fri Jun 15 2018 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-161945- Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano- Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 240 PM CDT Fri Jun 15 2018 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...Tonight Thunderstorms are possible tonight, especially over northern and eastern Wisconsin. The primary hazard posed by the storms will be heavy rainfall and localized flooding, but a few storms could also be severe and produce large hail and damaging wind gusts. .DAYS TWO THROUGH SEVEN...Saturday through Friday Thunderstorms are likely at times through the weekend and into early next week. Severe storms with large hail and damaging winds are possible, though the exact timing of the severe risk is difficult to discern. The storms could also produce heavy rainfall and pose a risk of flooding. Hot and humid conditions are possible on Saturday, and somewhat more likely on Sunday. Anyone engaged in outdoor activities should take the forecast conditions into account, and develop a plan to avoid heat-related illnesses. .SPOTTER INFORMATION STATEMENT... Spotters are requested to report rainfall amounts, flooding, hail, and damaging winds to the National Weather Service in Green Bay. LMZ521-522-541>543-161945- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 240 PM CDT Fri Jun 15 2018 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...Tonight Thunderstorms will pose a hazard to boaters on the lake and bay at times tonight. Dense fog is also possible on the lake at times. .DAYS TWO THROUGH SEVEN...Saturday through Friday There is a chance of thunderstorms will continue through Monday night. Dense fog is also possible at times through Monday night, especially on the lake. Skowronski/Uhlmann
The office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 7:39 PM CDT | Special Weather Statement | GRB | Portage, Wood | 51 min |
| Jun 15, 7:57 PM CDT | Special Weather Statement | GRB | Waushara | 63 min |
| Jun 15, 8:28 PM CDT | Special Weather Statement | GRB | Brown, Calumet, Door, Kewaunee, Marathon, Oconto and 7 more | 92 min |
| Jun 16, 6:40 AM CDT | Special Marine Warning | GRB | 65 min | |
| Jun 16, 7:25 AM CDT | Special Marine Warning | GRB | 75 min | |
| Jun 16, 7:57 AM CDT | Special Marine Warning | GRB | 33 min | |
| Jun 16, 8:46 AM CDT | Special Weather Statement | GRB | Door | 44 min |
| Jun 16, 9:02 AM CDT | Special Marine Warning | GRB | 88 min | |
| Jun 16, 9:09 AM CDT | Special Weather Statement | GRB | Marinette | 36 min |
| Jun 16, 9:27 AM CDT | Special Weather Statement | GRB | Oneida, Vilas | 48 min |
| Jun 16, 10:04 AM CDT | Special Weather Statement | GRB | Door | 41 min |
| Jun 16, 10:30 AM CDT | Special Marine Warning | GRB | 60 min | |
| Jun 16, 10:40 AM CDT | Special Weather Statement | GRB | Marinette | 50 min |
| Jun 16, 10:49 AM CDT | Special Marine Warning | GRB | 67 min | |
| Jun 16, 11:23 AM CDT | Special Weather Statement | GRB | Door | 37 min |
| Jun 16, 11:30 AM CDT | Special Marine Warning | GRB | 34 min | |
| Jun 16, 12:42 PM CDT | Special Weather Statement | GRB | Kewaunee | 48 min |
| Jun 16, 3:13 PM CDT | Special Weather Statement | GRB | Portage | 47 min |
| Jun 16, 3:49 PM CDT | Special Weather Statement | GRB | Waupaca | 41 min |
| Jun 16, 4:24 PM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Waupaca, Waushara, Winnebago | 66 min |
| Jun 16, 4:40 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 40 min |
| Jun 16, 4:48 PM CDT | Special Weather Statement | GRB | Forest | 57 min |
| Jun 16, 5:33 PM CDT | Special Weather Statement | GRB | Waupaca | 42 min |
| Jun 16, 6:02 PM CDT | Special Weather Statement | GRB | Vilas | 58 min |
| Jun 16, 6:08 PM CDT | Severe Thunderstorm Warning | GRB | Oneida, Vilas | 67 min |
Nearby
Flash Flood Watches in Wisconsin, 2018Every flash flood watch in 2018
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.