Alert archive / Missouri / Flash Flood Watches in 2021
Flash Flood Watch 4, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood watch at Jun 28, 2021, 3:54 AM CDT for Adams County, Brown County, Pike County, Illinois; 12 counties in Missouri. It took effect at Jun 28, 2021, 7:00 AM CDT. It was in force for 36 hr.
The area
The counties it named.
The facts
- Issued
- Jun 28, 2021, 3:54 AM CDT (08:54 UTC)
- In effect from
- Jun 28, 2021, 7:00 AM CDT
- Expired
- Jun 29, 2021, 7:00 PM CDT
- In force
- 36 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
Counties Adams County, IL, Brown County, IL, Pike County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 124 km from the middle of the area, began a volume at 08:53 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.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 8.9 hours before the alert went out and 262 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
- 4 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 1163 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
728 WGUS63 KLSX 280854 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service St Louis MO 354 AM CDT Mon Jun 28 2021 ILZ095>097-MOZ018-019-026-027-034>036-041-042-047-048-050-291200- /O.NEW.KLSX.FF.A.0004.210628T1200Z-210629T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau MO-Cole MO-Callaway MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Mexico, Bowling Green, Jefferson City, Hannibal, and Fulton 354 AM CDT Mon Jun 28 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH TUESDAY MORNING... The National Weather Service in St Louis has issued a * Flash Flood Watch for Portions of west central Illinois, including the following areas, Adams IL, Brown IL and Pike IL. Portions of Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Knox MO, Lewis MO, Marion MO, Moniteau MO, Monroe MO, Pike MO, Ralls MO and Shelby MO. * From 7 AM CDT this morning through Tuesday morning. * Numerous showers and thunderstorms capable of producing heavy rain are expected to develop today through early Tuesday morning across portions of central and northeast Missouri, as well as west-central Illinois. Locally heavy rain from these thunderstorms may produce localized flash flooding, particularly in areas where soils remain largely saturated from previous rainfall. Widespread rain amounts of 1 to 2 inches can be expected, with locally higher amounts likely. * Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Area creeks and streams are running high and could flood with more heavy rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ BRC
4 follow-up statements
880 WGUS63 KLSX 281956 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service St Louis MO 256 PM CDT Mon Jun 28 2021 ILZ095>097-MOZ018-019-026-027-034>036-041-042-047-048-050-300000- /O.EXT.KLSX.FF.A.0004.000000T0000Z-210630T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau MO-Cole MO-Callaway MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Mexico, Bowling Green, Jefferson City, Hannibal, and Fulton 256 PM CDT Mon Jun 28 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY EVENING... The Flash Flood Watch is now in effect for * Portions of west central Illinois, including the following areas, Adams IL, Brown IL and Pike IL. Portions of Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Knox MO, Lewis MO, Marion MO, Moniteau MO, Monroe MO, Pike MO, Ralls MO and Shelby MO. * Through Tuesday evening. * Waves of showers and thunderstorms capable of heavy rainfall are expected at times from this evening through Tuesday evening across north-central and northeastern Missouri as well as west-central Illinois. This heavy rainfall could occur repeatedly over some locations, including those that have previously received significant rainfall, leading to localized flash flooding. * Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Area creeks and streams are running high and could flood with more heavy rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Pfahler
032 WGUS63 KLSX 290835 FFALSX Flood Watch National Weather Service St Louis MO 335 AM CDT Tue Jun 29 2021 ILZ095>097-MOZ018-019-026-027-034>036-041-042-047-048-050-300000- /O.CON.KLSX.FF.A.0004.000000T0000Z-210630T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau MO-Cole MO-Callaway MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Mexico, Bowling Green, Jefferson City, Hannibal, and Fulton 335 AM CDT Tue Jun 29 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... The Flash Flood Watch continues for * Portions of west central Illinois, including the following areas, Adams IL, Brown IL and Pike IL. Portions of Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Knox MO, Lewis MO, Marion MO, Moniteau MO, Monroe MO, Pike MO, Ralls MO and Shelby MO. * Through this evening. * Waves of showers and thunderstorms capable of heavy rainfall are expected at times today across northeast and central Missouri as well as west-central Illinois. This heavy rainfall could occur repeatedly over some locations, including those that have previously received significant rainfall, leading to localized flash flooding. * Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Area creeks and streams are running high and could flood with more heavy rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ GKS
139 WGUS63 KLSX 291951 FFALSX Flood Watch National Weather Service St Louis MO 251 PM CDT Tue Jun 29 2021 ILZ095>097-MOZ018-019-026-027-034>036-041-042-047-048-050-300000- /O.CON.KLSX.FF.A.0004.000000T0000Z-210630T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau MO-Cole MO-Callaway MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Mexico, Bowling Green, Jefferson City, Hannibal, and Fulton 251 PM CDT Tue Jun 29 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... The Flash Flood Watch continues for * Portions of west central Illinois, including the following areas, Adams IL, Brown IL and Pike IL. Portions of Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Knox MO, Lewis MO, Marion MO, Moniteau MO, Monroe MO, Pike MO, Ralls MO and Shelby MO. * Until 7 PM CDT this evening. * Additional showers and thunderstorms capable of heavy rainfall are expected at times this afternoon and evening across northeast and central Missouri as well as west-central Illinois. This heavy rainfall could occur repeatedly over some locations, including those that have previously received significant rainfall, leading to localized flash flooding. * Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Area creeks and streams are running high and could flood with more heavy rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Gosselin
904 WGUS63 KLSX 292345 FFALSX Flood Watch National Weather Service St Louis MO 645 PM CDT Tue Jun 29 2021 ILZ095>097-MOZ018-019-026-027-034>036-041-042-047-048-050-300045- /O.EXP.KLSX.FF.A.0004.000000T0000Z-210630T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO-Boone MO-Audrain MO-Moniteau MO-Cole MO-Callaway MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Mexico, Bowling Green, Jefferson City, Hannibal, and Fulton 645 PM CDT Tue Jun 29 2021 ...FLASH FLOOD WATCH WILL EXPIRE AT 7 PM CDT THIS EVENING... The Flash Flood Watch for Portions of west central Illinois, including the following areas, Adams IL, Brown IL and Pike IL. Portions of Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Knox MO, Lewis MO, Marion MO, Moniteau MO, Monroe MO, Pike MO, Ralls MO and Shelby MO. will expire at 7 PM CDT this evening. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ MRB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:54 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 38 min |
| Jun 28, 3:42 AM CDT | Areal Flood Advisory | LSX | Callaway, Cole, Osage | 3 hr |
| Jun 28, 2:05 PM CDT | Areal Flood Advisory | LSX | Saint Louis | 3 hr |
| Jun 28, 4:37 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 53 min |
| Jun 28, 6:11 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Montgomery, Warren | 49 min |
Nearby
Flash Flood Watches in Missouri, 2021Flash Flood Watches in Illinois, 2021Every flash flood watch in 2021
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.