Alert archive / Missouri / Flash Flood Watches in 2017
Flash Flood Watch 1, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood watch at Apr 27, 2017, 4:29 AM CDT for 25 counties in Missouri; 15 counties in Illinois. It took effect at Apr 28, 2017, 7:00 PM CDT. It was in force for 51 hr.
The area
The counties it named.
The facts
- Issued
- Apr 27, 2017, 4:29 AM CDT (09:29 UTC)
- In effect from
- Apr 28, 2017, 7:00 PM CDT
- Expired
- Apr 30, 2017, 9:31 PM CDT
- In force
- 51 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
All 40 counties
Bond County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Madison County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 6 km from the middle of the area, began a volume at 09:28 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
Lincoln, IL (KILX), launched 00:00Z, 9.5 hours before the alert went out and 246 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
- 848 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 317 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
200 WGUS63 KLSX 270929 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Saint Louis MO 429 AM CDT Thu Apr 27 2017 ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-041-042-047>052- 059>065-072>075-084-085-099-272130- /O.NEW.KLSX.FF.A.0001.170429T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Pike MO-Boone MO-Audrain MO- Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Lincoln MO- Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 429 AM CDT Thu Apr 27 2017 ...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY EVENING THROUGH LATE SUNDAY NIGHT... The National Weather Service in Saint Louis has issued a * Flash Flood Watch for portions of Illinois and Missouri... including the following counties...in Illinois...Bond IL... Calhoun IL...Clinton IL...Fayette IL...Greene IL...Jersey IL... Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Randolph IL...Saint Clair IL and Washington IL. In Missouri...Audrain MO...Boone MO...Callaway MO...Cole MO... Crawford MO...Franklin MO...Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Montgomery MO... Osage MO...Pike MO...Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * from Friday evening through Sunday evening * Rainfall totals of 1 to 3 inches over the past 24 hours has set the stage for a significant flooding event this weekend. A slow moving potent storm system will interact with a very moist airmass to produce heavy rainfall over the weekend. Forecast rainfall totals of 2 to 5 inches are likely with higher amounts possible across southeastern Missouri and southern Illinois. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Significant rises on larger streams and rivers will also be possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ 2%
8 follow-up statements
236 WGUS63 KLSX 272052 FFALSX Flood Watch National Weather Service Saint Louis MO 352 PM CDT Thu Apr 27 2017 ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-041-042-047>052- 059>065-072>075-084-085-099-281030- /O.CON.KLSX.FF.A.0001.170429T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Pike MO-Boone MO-Audrain MO- Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Lincoln MO- Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 352 PM CDT Thu Apr 27 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM FRIDAY EVENING THROUGH LATE SUNDAY NIGHT... The Flash Flood Watch continues for * portions of Illinois and Missouri...including the following counties...in Illinois...Bond IL...Calhoun IL...Clinton IL... Fayette IL...Greene IL...Jersey IL...Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Randolph IL... Saint Clair IL and Washington IL. In Missouri...Audrain MO... Boone MO...Callaway MO...Cole MO...Crawford MO...Franklin MO... Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Montgomery MO...Osage MO...Pike MO... Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * from Friday evening through late Sunday night * Recent rainfall has has set the stage for a significant flooding event this weekend. A slow moving and potent storm system will interact with a very moist airmass to produce heavy rainfall over the weekend. Rainfall totals of 2 to 5 inches are likely with locally higher amounts possible across southeastern Missouri and southern Illinois. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is also possible on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ Carney
030 WGUS63 KLSX 280934 FFALSX Flood Watch National Weather Service Saint Louis MO 434 AM CDT Fri Apr 28 2017 ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-041-042-047>052- 059>065-072>075-084-085-099-282145- /O.CON.KLSX.FF.A.0001.170429T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Pike MO-Boone MO-Audrain MO- Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Lincoln MO- Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 434 AM CDT Fri Apr 28 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH LATE SUNDAY NIGHT... The Flash Flood Watch continues for * portions of Illinois and Missouri...including the following counties...in Illinois...Bond IL...Calhoun IL...Clinton IL... Fayette IL...Greene IL...Jersey IL...Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Randolph IL... Saint Clair IL and Washington IL. In Missouri...Audrain MO... Boone MO...Callaway MO...Cole MO...Crawford MO...Franklin MO... Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Montgomery MO...Osage MO...Pike MO... Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * from this evening through late Sunday night * Recent rainfall has set the stage for a significant flooding event this weekend. A slow moving and potent storm system will interact with a very moist airmass to produce heavy rainfall over the weekend. Rainfall totals of 3 to 5 inches are likely with locally higher amounts possible across southeastern Missouri and southern Illinois. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is also possible on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ GKS
471 WGUS63 KLSX 282002 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Saint Louis MO 302 PM CDT Fri Apr 28 2017 ILZ097-MOZ034-035-291000- /O.EXA.KLSX.FF.A.0001.170429T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pike IL-Monroe MO-Ralls MO- Including the city of Pittsfield 302 PM CDT Fri Apr 28 2017 ...FLASH FLOOD WATCH IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH LATE SUNDAY NIGHT... The National Weather Service in Saint Louis has expanded the * Flash Flood Watch to include portions of west central Illinois and northeast Missouri...including the following counties...in west central Illinois...Pike IL. In northeast Missouri... Monroe MO and Ralls MO. * from 7 PM CDT this evening through late Sunday night * Recent rainfall has set the stage for a significant flooding event this weekend. A slow moving and potent storm system will interact with a very moist airmass to produce heavy rainfall over the weekend. Rainfall totals of 3 to 5 inches are likely. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is also possible on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ ILZ058>060-064-065-069-070-074-079-098>102-MOZ036-041-042-047>052- 059>065-072>075-084-085-099-291000- /O.CON.KLSX.FF.A.0001.170429T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Pike MO-Boone MO-Audrain MO- Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-Lincoln MO- Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 302 PM CDT Fri Apr 28 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH LATE SUNDAY NIGHT... The Flash Flood Watch continues for * portions of Illinois and Missouri...including the following counties...in Illinois...Bond IL...Calhoun IL...Clinton IL... Fayette IL...Greene IL...Jersey IL...Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Randolph IL... Saint Clair IL and Washington IL. In Missouri...Audrain MO... Boone MO...Callaway MO...Cole MO...Crawford MO...Franklin MO... Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Montgomery MO...Osage MO...Pike MO... Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * from 7 PM CDT this evening through late Sunday night * Recent rainfall has set the stage for a significant flooding event this weekend. A slow moving and potent storm system will interact with a very moist airmass to produce heavy rainfall over the weekend. Rainfall totals of 3 to 5 inches are likely with locally higher amounts possible along Interstate 44 corridor in Missouri and Interstate 55 corridor in Illinois. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is also possible on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ Byrd
630 WGUS63 KLSX 290940 FFALSX Flood Watch National Weather Service Saint Louis MO 440 AM CDT Sat Apr 29 2017 ILZ058>060-064-065-069-070-074-079-097>102-MOZ034>036-041-042- 047>052-059>065-072>075-084-085-099-292145- /O.CON.KLSX.FF.A.0001.000000T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Pike IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Monroe MO-Ralls MO-Pike MO- Boone MO-Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO- Franklin MO-Saint Louis MO-Saint Louis City MO-Jefferson MO- Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Pittsfield, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 440 AM CDT Sat Apr 29 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT... The Flash Flood Watch continues for * portions of Illinois and Missouri...including the following counties...in Illinois...Bond IL...Calhoun IL...Clinton IL... Fayette IL...Greene IL...Jersey IL...Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Pike IL... Randolph IL...Saint Clair IL and Washington IL. In Missouri... Audrain MO...Boone MO...Callaway MO...Cole MO...Crawford MO... Franklin MO...Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Monroe MO...Montgomery MO... Osage MO...Pike MO...Ralls MO...Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * through late Sunday night * Recent rainfall has set the stage for a significant flooding event this weekend. A slow moving and potent storm system will interact with a very moist airmass to produce heavy rainfall over the weekend. Rainfall totals of 3 to 5 inches are likely with locally higher amounts possible along the Interstate 44 corridor in Missouri and Interstate 55 corridor in Illinois. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is also possible on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ GKS
810 WGUS63 KLSX 292107 FFALSX Flood Watch National Weather Service Saint Louis MO 407 PM CDT Sat Apr 29 2017 ILZ058>060-064-065-069-070-074-079-097>102-MOZ034>036-041-042- 047>052-059>065-072>075-084-085-099-301000- /O.CON.KLSX.FF.A.0001.000000T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Pike IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Monroe MO-Ralls MO-Pike MO- Boone MO-Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO- Franklin MO-Saint Louis MO-Saint Louis City MO-Jefferson MO- Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Pittsfield, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 407 PM CDT Sat Apr 29 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT... The Flash Flood Watch continues for * portions of Illinois and Missouri...including the following counties...in Illinois...Bond IL...Calhoun IL...Clinton IL... Fayette IL...Greene IL...Jersey IL...Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Pike IL... Randolph IL...Saint Clair IL and Washington IL. In Missouri... Audrain MO...Boone MO...Callaway MO...Cole MO...Crawford MO... Franklin MO...Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Monroe MO...Montgomery MO... Osage MO...Pike MO...Ralls MO...Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * through late Sunday night * Recent rainfall has set the stage for a significant flooding event this weekend. A slow moving and potent storm system will continue to interact with a very moist airmass to produce heavy rainfall through Sunday evening. Rainfall totals of 3 to 5 inches are likely with locally higher amounts possible along and south of the Interstate 44 corridor in Missouri and Interstate 55 corridor in Illinois. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is also possible on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ Byrd
348 WGUS63 KLSX 301000 FFALSX Flood Watch National Weather Service Saint Louis MO 500 AM CDT Sun Apr 30 2017 ILZ058>060-064-065-069-070-074-079-097>102-MOZ034>036-041-042- 047>052-059>065-072>075-084-085-099-302200- /O.CON.KLSX.FF.A.0001.000000T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Pike IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Monroe MO-Ralls MO-Pike MO- Boone MO-Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO- Franklin MO-Saint Louis MO-Saint Louis City MO-Jefferson MO- Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Pittsfield, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 500 AM CDT Sun Apr 30 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * portions of Illinois and Missouri...including the following counties...in Illinois...Bond IL...Calhoun IL...Clinton IL... Fayette IL...Greene IL...Jersey IL...Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Pike IL... Randolph IL...Saint Clair IL and Washington IL. In Missouri... Audrain MO...Boone MO...Callaway MO...Cole MO...Crawford MO... Franklin MO...Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Monroe MO...Montgomery MO... Osage MO...Pike MO...Ralls MO...Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * through late tonight * A slow moving and potent storm system coupled with a slow moving front will continue to interact with a very moist airmass to produce additional heavy rainfall through this evening. Additional rainfall amounts of around one inch with locally higher amounts on top of the already saturated grounds and rivers and streams running at bankfull from the heavy rains the last couple of days will lead to additional flooding concerns today into tonight. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and ultimately dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is also possible on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ GKS
551 WGUS63 KLSX 302108 FFALSX Flood Watch National Weather Service Saint Louis MO 408 PM CDT Sun Apr 30 2017 ILZ058>060-064-065-069-070-074-079-097>102-MOZ034>036-041-042- 047>052-059>065-072>075-084-085-099-010600- /O.CON.KLSX.FF.A.0001.000000T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Pike IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Monroe MO-Ralls MO-Pike MO- Boone MO-Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO- Franklin MO-Saint Louis MO-Saint Louis City MO-Jefferson MO- Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Pittsfield, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 408 PM CDT Sun Apr 30 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 1 AM CDT MONDAY... The Flash Flood Watch continues for * portions of Illinois and Missouri...including the following counties...in Illinois...Bond IL...Calhoun IL...Clinton IL... Fayette IL...Greene IL...Jersey IL...Macoupin IL...Madison IL...Marion IL...Monroe IL...Montgomery IL...Pike IL... Randolph IL...Saint Clair IL and Washington IL. In Missouri... Audrain MO...Boone MO...Callaway MO...Cole MO...Crawford MO... Franklin MO...Gasconade MO...Iron MO...Jefferson MO...Lincoln MO...Madison MO...Moniteau MO...Monroe MO...Montgomery MO... Osage MO...Pike MO...Ralls MO...Reynolds MO...Saint Charles MO...Saint Francois MO...Saint Louis City MO...Saint Louis MO...Sainte Genevieve MO...Warren MO and Washington MO. * until 1 AM CDT Monday * Scattered thunderstorms through this evening could produce locally heavy rainfall. Additional rainfall amounts of around one inch with locally higher amounts on top of the already saturated grounds and ongoing flooding could produce localized flash flooding. * Heavy rainfall will result in flooding of low lying or poor drainage areas...and dangerous flash flooding on smaller creeks and streams. Moderate to major flooding is either occurring or forecast on larger streams and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch is advanced notice that conditions are favorable that may lead to flash flooding. People in the Watch area, especially in flood prone areas, should use this time to make preparations just in case. Stay informed, and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued. && $$ Glass
362 WGUS63 KLSX 010231 FFALSX Flood Watch National Weather Service Saint Louis MO 931 PM CDT Sun Apr 30 2017 ILZ058>060-064-065-069-070-074-079-097>102-MOZ034>036-041-042- 047>052-059>065-072>075-084-085-099-010345- /O.CAN.KLSX.FF.A.0001.000000T0000Z-170501T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Pike IL-Calhoun IL-Jersey IL- Madison IL-Saint Clair IL-Monroe IL-Monroe MO-Ralls MO-Pike MO- Boone MO-Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO- Montgomery MO-Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO- Franklin MO-Saint Louis MO-Saint Louis City MO-Jefferson MO- Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO- Iron MO-Madison MO-Reynolds MO- Including the cities of Litchfield, Vandalia, Centralia, Salem, Chester, Sparta, Pittsfield, Alton, Edwardsville, Belleville, Cahokia, Bowling Green, Columbia, Mexico, Jefferson City, Fulton, Saint Charles, Washington, Union, Sullivan, Saint Louis, and Farmington 931 PM CDT Sun Apr 30 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of Illinois and Missouri has been cancelled. Any moderate to heavy rainfall has ended across the area. $$ Gosselin
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 St. Louis, MO wrote its last area forecast discussion before this flash flood watch went out at Apr 27, 4:08 AM CDT, 21 minutes earlier.
Area forecast discussion, Apr 27, 4:08 AM CDT, 21 minutes before
Area Forecast Discussion
National Weather Service Saint Louis MO
408 AM CDT Thu Apr 27 2017
.SHORT TERM... (Through Late Tonight)
Issued at 407 AM CDT Thu Apr 27 2017
Showers are in the process of moving out of CWA early this morning.
This is happening as the negatively tilted upper trough lifts
northeast into the Great Lakes this morning. GFS/NAM are showing a
shortwave ridge building into the area later today which will help
bring in some clearing temporarily. But then the next shortwave
trough will already be advancing into the Central Plains tonight.
Showers will develop by late this evening and overnight as moisture
convergence develops on the nose of the low level jet.
There will be cold air advection this morning before it ends as the
surface ridge axis passes to the east this afternoon. Highs will be
5-15 degrees cooler today than yesterday. There will not be much of
a diurnal change tonight with increasing clouds and winds
increasing from the south.
Britt
.LONG TERM... (Friday through Wednesday)
Issued at 407 AM CDT Thu Apr 27 2017
Fri - Sun night
This is shaping up to be a very active prd with chances for strong
to SVR TSTMs and a prolonged prd of heavy rainfall that will likely
worsen existing flooding and cause additional flooding through the
weekend and into next week as a strong phased storm system impacts
the cntrl CONUS.
Upper level system that will eventually drive the SFC low is just
now coming onshore across the Pacific NW. Meanwhile, a short wave
rounding the base of the long wave trough will lift a weak SFC low
NE thru the FA. Both SFC and upper level systems will weaken thru
the day but will push a weak cold front thru the CWA. This bndry
will move thru the sthrn CWA drng the aftn with strong to SVR TSTMs
possible. The bndry/outflow will sink S of the FA Fri night...but
not too far. The upper level system will dig S into nthrn NM Fri/Fri
night. After midnight...the LLJ begins ramping up with elevated
precip bcmng widespread across the sthrn CWA overnight. The ECMWF is
further N than the GFS with the bndry and assoc instability so can't
rule out elevated hailers. As the upper level low emerges into the
sthrn Plains on Sat...the SFC low will lift NE out of TX. The
ongoing precip may act to suppress the northward advancement of the
warm front but this just means that wherever that sets up will
receive an extended prd of heavy rainfall. The upper level low lifts
NE into the cntrl Plains on Sun with the SFC tracking from NE TX to
NE MO by Sun evng. The warm front will be slow to move until the SFC
low moves N on Sun. Expect persistent convection along the warm
front as it moves N thru the wknd. A continuous LLJ will provide a
constant supply of theta-e rich air from the Caribbean. Dps in the
mid/upper 60s will help contribute to PWATs in excess of 1.5" with
some indications of values approaching 2.0". These values are at
least 2-3 SDs above normal. If PWATs reach above 1.75"...it would
set a record for the season. Also, warm cloud depths are between 3.5-
4 km. These values would be impressive during the summer but are on
the far high side of the spectrum for this time of the year. The
combination of the strength and dynamics of the system and the heavy
rain parameters indicate that this could be a significant hydrologic
event. Therefore, will issue a flash flood watch from Fri evng thru
Sun evng for widespread 2-5 inches with higher amounts possible
across SE MO and on into sthrn IL. The heavy rain threat will come
to an end as the SFC cold front moves thru the CWA Sun aftn/evng and
the dry slot overspreads the region. Although SPC does not have the
FA outlooked on Sun...would expect a thin line of convection to form
along the cold front with wind being the primary threat. There will
also be plenty of gradient winds assoc with this system.
Mon - Mon night
CAA will continue with wrap around precip possible across NE MO and W
cntrl IL Mon. The system becomes stacked early next week as the low
moves from the Midwest to the Grt Lks. Temps will be 10-15 degrees
below normal Mon.
Tue - Wed
A short wave embedded in NW flow will deepen as it approaches the
region producing light precip. There are still significant
differences in model solutions drng this prd...but any addtnl precip
would not help any ongoing flooding.
2%
&&
.AVIATION... (For the 06z TAFs through 06z Thursday Night)
Issued at 1157 PM CDT Wed Apr 26 2017
Rain and IFR conditions prevail for most of the TAF sites will
begin to slowly retreat from SW to NE overnight and into early
Thursday morning, yielding VFR conditions thereafter. Dry wx is
also expected for much of the region once this current episode of
rain leaves late tonight with rain chances again on the increase
heading into Thursday night but low enough to preclude mention in
TAF. W-NW winds will continue for much of Thursday before becoming
light-variable with a surface RIDGE building in, and eventually
leading to an easterly flow later on Thursday night.
SPECIFICS FOR KSTL: IFR conditions and rain to continue until
around 09z with improvement to VFR and dry wx by daybreak
Thursday. W-NW surface winds until Thursday afternoon becoming
light-variable then easterly later on Thursday night.
TES
&&
.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flash Flood Watch from Friday evening through late Sunday night
for Audrain MO-Boone MO-Callaway MO-Cole MO-Crawford MO-
Franklin MO-Gasconade MO-Iron MO-Jefferson MO-Lincoln MO-
Madison MO-Moniteau MO-Montgomery MO-Osage MO-Pike MO-
Reynolds MO-Saint Charles MO-Saint Francois MO-Saint Louis
City MO-Saint Louis MO-Sainte Genevieve MO-Warren MO-
Washington MO.
IL...Flash Flood Watch from Friday evening through late Sunday night
for Bond IL-Calhoun IL-Clinton IL-Fayette IL-Greene IL-
Jersey IL-Macoupin IL-Madison IL-Marion IL-Monroe IL-
Montgomery IL-Randolph IL-Saint Clair IL-Washington IL.
&&
WFO LSXHazardous weather outlook, Apr 26, 7:00 PM CDT, 9 hours 29 minutes before
Hazardous Weather Outlook National Weather Service Saint Louis MO 700 PM CDT Wed Apr 26 2017 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-271200- Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL- Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO- Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO- Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO- Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- 700 PM CDT Wed Apr 26 2017 This hazardous weather outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Severe thunderstorms will be possible along and south of I-70 corridor Friday night. Large hail and damaging winds will be the primary threats but a few tornadoes will also be possible. Heavy rainfall is also likely through the weekend, mainly along and south of Interstate 44 in Missouri and Interstate 70 in Illinois. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. TES
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 8:13 PM CDT | River Flood Warning | LSX | Reynolds | 55 hr |
| Apr 26, 9:51 PM CDT | River Flood Warning | LSX | Pike | 45 days |
| Apr 26, 9:51 PM CDT | River Flood Warning | LSX | Saint Charles | 47 days |
Nearby
Flash Flood Watches in Missouri, 2017Flash Flood Watches in Illinois, 2017Every flash flood watch in 2017
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.